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191 results on '"Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES )"'

1. Surface-induced assembly of sophorolipids

Author: Ahmed Hamraoui, Niki Baccile, Vincent Humblot, Jessie Peyre, Marco Faustini, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), Matériaux et Biologie ( MATBIO ), Université Paris Descartes - Faculté des Sciences Fondamentales et Biomédicales ( UPD5 Sciences ), Université Paris Descartes - Paris 5 ( UPD5 ), Matériaux Hybrides et Nanomatériaux ( MHN ), Laboratoire de Réactivité de Surface ( LRS ), Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Matériaux et Biologie (MATBIO), Université Paris Descartes - Faculté des Sciences Fondamentales et Biomédicales (UPD5 Sciences), Université Paris Descartes - Paris 5 (UPD5), Matériaux Hybrides et Nanomatériaux (LCMCP-MHN), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (LCMCP-SMiLES), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), Collège de France (CdF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Matériaux Hybrides et Procédés (LCMCP-MHP ), and Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP)
Subjects: Anatase, Materials science, Silicon, Scanning electron microscope, Sophorolipid, General Physics and Astronomy, chemistry.chemical_element, Electron donor, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Micelle, Surface energy, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry.chemical_compound, Chemical engineering, chemistry, [ CHIM.THEO ] Chemical Sciences/Theoretical and/or physical chemistry, Organic chemistry, Relative humidity, Physical and Theoretical Chemistry, 0210 nano-technology
Abstract: International audience; The surface self-assembly properties of acidic sophorolipids, a bolaform microbial glycolipids with pH-responsive properties in solution, were studied based on the chemical nature of the support and pH of the solution. Sophorolipids generally form micelles in water but formation of morphologies like platelets and twisted fibers depending on pH have also been reported. The surface self-assembly was achieved using dip-coating on three different substrates namely gold, silicon(111) and TiO 2 anatase. Deposition conditions (dip-coating withdrawal speed, relative humidity, temperature) were tested, and it was found that optimum self-assembly occurred at a withdrawal speed of 1 mm s À1 , T of 25 1C and relative humidity of 25%. The local structure of the sophorolipid films was characterized by Atomic Force Microscopy, while Scanning Electron Microscopy was used to characterize the spatial homogeneity. We also attempted to correlate dispersive, electron donor and electron attractor surface energy components, using Good–Van Oss's approach, and the behavior of sophorolipids. We found that when the surface energy is dominated by dispersive components, sophorolipids spontaneously assemble into entangled needles at all pH values (4, 6 and 11). However, when the surface energy is dominated by electronic components, pH has a strong influence on the surface self-assembly. We could discriminate three major organizations: homogeneous layer, isolated aggregates and a two-dimensional network similar to block copolymer surface self-assembly.
Published: 2017

2. Macroscopic electrostatic effects in ATR-FTIR spectra of modern and archeological bones

Author: Xavier Gallet, Loïc Ségalen, Julie Aufort, Christian Brouder, Christel Gervais, Etienne Balan, Matthieu Lebon, Institut de minéralogie, de physique des matériaux et de cosmochimie ( IMPMC ), Muséum National d'Histoire Naturelle ( MNHN ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique ( CNRS ), Histoire naturelle de l'Homme préhistorique ( HNHP ), Muséum National d'Histoire Naturelle ( MNHN ) -Université de Perpignan Via Domitia ( UPVD ) -Centre National de la Recherche Scientifique ( CNRS ), Biominéralisations et environnements sédimentaires ( BES ), Institut des Sciences de la Terre de Paris ( iSTeP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Centre National de la Recherche Scientifique ( CNRS ) -Collège de France ( CdF ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ) -Collège de France ( CdF ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Biominéralisations et environnements sédimentaires (BES), Institut des Sciences de la Terre de Paris (iSTeP), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), and Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS)
Subjects: fossilization, 010506 paleontology, Materials science, Enamel paint, ATR-FTIR spectroscopy, Atr ftir spectroscopy, Infrared spectroscopy, electrostatic properties, 010502 geochemistry & geophysics, 01 natural sciences, bone, Apatite, Diagenesis, Ftir spectra, Biomaterials, Geophysics, Geochemistry and Petrology, visual_art, visual_art.visual_art_medium, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology, [ SDU.STU.MI ] Sciences of the Universe [physics]/Earth Sciences/Mineralogy, 0105 earth and related environmental sciences, Nuclear chemistry, [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy, [ SDU.STU.PG ] Sciences of the Universe [physics]/Earth Sciences/Paleontology
Abstract: International audience; Bones mostly consist of composite materials based on almost equivalent volume fractions of mineral (apatite) and organic (collagen) components. Accordingly, their infrared spectroscopic properties should reflect this composite nature. In this letter, we show by theory and experiment that the variability of the strong phosphate bands in the ATR-FTIR spectra of a series of modern and archeological bone samples can be related to electrostatic interactions affecting apatite particles and depending on the bone collagen content. Key parameters controlling the shape of these bands are the mineral volume fraction and the dielectric constant of the embedding matrix. The magnitude of these effects is larger than the one related to microscopic changes of the apatite structure. Consequently, the interplay of microscopic and macroscopic parameters should be considered when using FTIR spectroscopy to monitor the preservation state of bioapatite during diagenetic and fossilization processes, especially during the degradation of the organic fraction of bone.
Published: 2018

3. Involvement of 3D osteoblast migration and bone apatite during in vitro early osteocytogenesis

Author: Nadine Nassif, Thierry Azaïs, Marc Robin, Corinne Illoul, Bernard Haye, Julie Lesieur, Marie-Madeleine Giraud-Guille, Claudia Almeida, Christophe Hélary, Matériaux Hybrides et Nanomatériaux (MHN), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Matériaux et Biologie (MATBIO), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Pathologies, Imagerie et Biothérapies oro-faciales (EA 2496), Université Paris Descartes - Paris 5 (UPD5), Labex Matisse, ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Matériaux Hybrides et Nanomatériaux ( MHN ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), Matériaux et Biologie ( MATBIO ), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), Pathologies, Imagerie et Biothérapies oro-faciales ( EA 2496 ), Université Paris Descartes - Paris 5 ( UPD5 ), ANR-11-IDEX-0004-02/10-LABX-0067,MATISSE,MATerials, InterfaceS, Surfaces, Environment ( 2011 ), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), and ANR-11-IDEX-0004-02/10-LABX-0067,MATISSE,MATerials, InterfaceS, Surfaces, Environment(2011)
Subjects: 0301 basic medicine, Histology, Physiology, Endocrinology, Diabetes and Metabolism, Nanotopography, 02 engineering and technology, Models, Biological, Osteocytes, Bone and Bones, Extracellular matrix, 03 medical and health sciences, Cell Movement, Osteogenesis, Apatites, Bone cell, Osteocyte differentiation, medicine, Animals, Humans, Cells, Cultured, Migration, Bone morphogenesis, Bone mineral, Bone apatite, Osteoblasts, Sheep, Chemistry, Osteoblast, Anatomy, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, DMP1, Rats, Cell biology, Phenotype, 030104 developmental biology, medicine.anatomical_structure, Osteocyte, [ CHIM.MATE ] Chemical Sciences/Material chemistry, 0210 nano-technology
Abstract: International audience; The transition from osteoblast to osteocyte is described to occur through passive entrapment mechanism (self-buried, or embedded by neighboring cells). Here, we provide evidence of a new pathway where osteoblasts are “more” active than generally assumed. We demonstrate that osteoblasts possess the ability to migrate and differentiate into early osteocytes inside dense collagen matrices. This step involves MMP-13 simultaneously with IBSP and DMP1 expression. We also show that osteoblast migration is enhanced by the presence of apatite bone mineral. To reach this conclusion, we used an in vitro hybrid model based on both the structural characteristics of the osteoid tissue (including its density, texture and three-dimensional order), and the use of bone-like apatite. This finding highlights the mutual dynamic influence of osteoblast cell and bone extra cellular matrix. Such interactivity extends the role of physicochemical effects in bone morphogenesis complementing the widely studied molecular signals. This result represents a conceptual advancement in the fundamental understanding of bone formation.
Published: 2016

4. Tissue free DNA precipitates hydroxyl-apatite crystals in the arterial wall

Author: Coscas, Raphaël, Bensussan, Marie, Jacob, Marie-Paule, Chaussain, Catherine, Daudon, Michel, Bazin, Dominique, Michel, Jean-Baptiste, Laboratoire de Recherche Vasculaire Translationnelle (LVTS (UMR_S_1148 / U1148)), Université Paris 13 (UP13)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de Référence des Maladies Rares du Métabolisme du Calcium et du Phosphore, Hôpital Bretonneau, Pathologies, Imagerie et Biothérapies oro-faciales (EA 2496), Université Paris Descartes - Paris 5 (UPD5), Service d'Odontologie [Bretonneau], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Bretonneau, Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), HAL-UPMC, Gestionnaire, Laboratoire de Recherche Vasculaire Translationnelle ( LVTS ), Université Paris 13 ( UP13 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Pathologies, Imagerie et Biothérapies oro-faciales ( EA 2496 ), Université Paris Descartes - Paris 5 ( UPD5 ), Assistance publique - Hôpitaux de Paris (AP-HP)-Hôpital Bretonneau, Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), CHU Tenon [APHP]-Assistance publique - Hôpitaux de Paris - AP-HP (FRANCE), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)
Subjects: [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, [ SDV.MHEP ] Life Sciences [q-bio]/Human health and pathology, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract: International audience; Arterial wall calcium score, quantified by X-ray scanning, is now used in clinical practice as one of the strongest biomarkers of cardiovascular risk. Calcium phosphate and hydroxyapatite retention in the arterial wall necessitate precipitation on a tissue anionic platform. In the present study we explore the potential role of tissue free DNA as one of this platform. For this purpose we developed both an observational approach on human early stages of atheroma and an experimental demonstration by infusing free DNA in the arterial wall of rats.The first step consisted in histological examination of samples from human and rat spontaneously calcified arteries. Various stains were used to evaluate co-localization of free DNA with calcified tissues before and after section treatment by EDTA. In a second step, a rat model of vascular calcifications provoked by various intra-aortic infusions of free DNA and free DNA + elastase was assessed. Rats underwent a micro-CT for calcium score calculation before being sacrificed at 3 weeks.Our histological study shows a co-localization of calcified arterial plaques with free DNA in human atherosclerotic lesions and in the wall of aneurysm in rats. In the intra-aortic infusion model, free fragmented DNA was able to cross the arterial wall and induce calcifications whereas no microscopic calcification was seen in sham aortas. The calcification score of the free DNA + elastase was significantly higher than the free DNA group (p =.02) and the control group (p
Published: 2016

5. Claudin-16 deficiency impairs tight junction function in ameloblasts, leading to abnormal enamel formation

Author: Bardet, Claire, Courson, Frédéric, Wu, Yong, Khaddam, Mayssam, Salmon, Benjamin, Ribes, Sandy, Thumfart, Julia, Yamaguti, Paulo, Rochefort, Gael, Figueres, Marie-Lucile, Breiderhoff, Tilman, Garcia-Castaño, Alejandro, Vallée, Benoît, Le Denmat, Dominique, Baroukh, Brigitte, Guilbert, Thomas, Schmitt, Alain, Massé, Jean-Marc, Bazin, Dominique, Lorenz, Georg, Morawietz, Maria, Hou, Jianghui, Carvalho-Lobato, Patricia, Manzanares, Maria Cristina, Fricain, Jean-Christophe, Talmud, Déborah, Demontis, Renato, Neves, Francisco, Zenaty, Delphine, Berdal, Ariane, Kiesow, Andreas, Petzold, Matthias, Menashi, Suzanne, Linglart, Agnès, Acevedo, Ana Carolina, Vargas-Poussou, Rosa, Müller, Dominik, Houillier, Pascal, Chaussain, Catherine, Publica, Pathologies, Imagerie et Biothérapies oro-faciales (EA 2496), Université Paris Descartes - Paris 5 (UPD5), Service d'Odontologie [Bretonneau], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Bretonneau, Centre National de Référence des Maladies Rares du Métabolisme du Calcium et du Phosphore, Hôpital Bretonneau, Centre de Recherche des Cordeliers (CRC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratory CRRET, Université Paris-Est (UPE), Institut Cochin (IC UM3 (UMR 8104 / U1016)), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Bioingénierie tissulaire (BIOTIS), Université de Bordeaux (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM), Département de pédiatrie, Centre Hospitalier Régional d'Orléans (CHRO), Group Hospitalier public Sud Oise GHPSO (Creil), Service de pédiatrie générale, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Robert Debré-Université Paris Diderot - Paris 7 (UPD7), Pathologies, Imagerie et Biothérapies oro-faciales ( EA 2496 ), Université Paris Descartes - Paris 5 ( UPD5 ), Assistance publique - Hôpitaux de Paris (AP-HP)-Hôpital Bretonneau, Centre de Recherche des Cordeliers ( CRC ), Université Paris Diderot - Paris 7 ( UPD7 ) -École pratique des hautes études ( EPHE ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Université Paris-Est ( UPE ), Institut Cochin ( UM3 (UMR 8104 / U1016) ), Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physique des Solides ( LPS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), Bioingénierie tissulaire ( BIOTIS ), Université Bordeaux Segalen - Bordeaux 2-Institut National de la Santé et de la Recherche Médicale ( INSERM ), Centre Hospitalier Régional d'Orléans ( CHR ), Assistance publique - Hôpitaux de Paris (AP-HP)-Hôpital Robert Debré-Université Paris Diderot - Paris 7 ( UPD7 ), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpital Bretonneau, Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), Université Bordeaux Segalen - Bordeaux 2-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional d'Orléans (CHR), and Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Hôpital Robert Debré-Université Paris Diderot - Paris 7 (UPD7)
Subjects: Adult, Male, Amelogenesis Imperfecta, Syndrome, Hydrogen-Ion Concentration, Middle Aged, Tight Junctions, Mice, Young Adult, stomatognathic diseases, Phenotype, stomatognathic system, [ SDV.MHEP ] Life Sciences [q-bio]/Human health and pathology, Claudins, Mutation, Ameloblasts, [SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Animals, Humans, Female, Child, Dental Enamel, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, ComputingMilieux_MISCELLANEOUS
Abstract: International audience; Claudin-16 protein (CLDN16) is a component of tight junctions (TJ) with a restrictive distribution so far demonstrated mainly in the kidney. Here, we demonstrate the expression of CLDN16 also in the tooth germ and show that claudin-16 gene (CLDN16) mutations result in amelogenesis imperfecta (AI) in the 5 studied patients with familial hypomagnesemia with hypercalciuria and nephrocalcinosis (FHHNC). To investigate the role of CLDN16 in tooth formation, we studied a murine model of FHHNC and showed that CLDN16 deficiency led to altered secretory ameloblast TJ structure, lowering of extracellular pH in the forming enamel matrix, and abnormal enamel matrix protein processing, resulting in an enamel phenotype closely resembling human AI. This study unravels an association of FHHNC owing to CLDN16 mutations with AI, which is directly related to the loss of function of CLDN16 during amelogenesis. Overall, this study indicates for the first time the importance of a TJ protein in tooth formation and underlines the need to establish a specific dental follow-up for these patients. © 2015 American Society for Bone and Mineral Research.
Published: 2016

6. Effet de la durée de séjour in situ sur les propriétés des sondes JJ: une étude par MEB et par analyse mécanique

Author: Poulard, Christophe, Dessombz, Arnaud, Daudon, Michel, Bazin, Dominique, Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche des Cordeliers (CRC), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Tenon [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides ( LPS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Recherche des Cordeliers ( CRC ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -École pratique des hautes études ( EPHE ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [APHP]-Assistance publique - Hôpitaux de Paris - AP-HP (FRANCE), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Tenon [APHP], and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [ SDV.MHEP.UN ] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Urology, Mechanical analysis, JJ stents, Sondes JJ, [ SDV.IB.BIO ] Life Sciences [q-bio]/Bioengineering/Biomaterials, Analyse mécanique, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Surface defect, Observation MEB, Analyse FTIR, Chemical analysis, Défaut de surface, Urologie, [SDV.IB.BIO]Life Sciences [q-bio]/Bioengineering/Biomaterials, SEM observation
Abstract: International audience; The JJ stent constitutes a medical device extensively used nowadays by urologists in more than 40,000 patients per year in France. In this investigation, we characterize the surface state and the elastic properties of a set of JJ stents on which pathological calcifications are present. These encrustations have been identified by Fourier transform infrared spectroscopy. A surface examination by scanning electron microscopy indicates the existence of defects. The striking point of these observations is that black marks, present at the surface to help urologists during the operation, significantly alter the surface and may serve as nucleation centers. Moreover, elastic properties are not preserved when the indwelling time of JJ stents is longer than 12 wk. Such data may help industrial companies to develop new JJ stents, which avoid the formation of encrustations and help the clinician to optimize the lifetime of JJ stents in patients.; Les sondes JJ constituent un dispositif médical largement utilisé de nos jours par les urologues chez plus de 40 000 patients par an en France. Dans cette étude, nous caractérisons l'état de surface et les propriétés élastiques d'un ensemble de sondes JJ sur lesquelles des calcifications pathologiques sont présentes. Ces incrustations ont été identifiées par spectrophotométrie infrarouge à transformée de Fourier. Un examen de surface par microscopie électronique à balayage indique l'existence de défauts. Le point marquant de ces observations vient du fait que les marques noires présentes à la surface pour aider les urologues pendant l'opération modifient de manière significative la surface et peuvent servir de sites de nucléation. De plus, les propriétés élastiques ne sont pas conservées lorsque le temps de séjour de ces sondes chez le patient est supérieur à 12 semaines. Ces données peuvent donc aider les industriels à développer de nouvelles sondes JJ évitant la formation d'incrustations et aider le clinicien à optimiser la durée de vie des sondes JJ chez les patients.
Published: 2016

7. Comprehensive morpho-constitutional analysis of urinary stones improves etiological diagnosis and therapeutic strategy of nephrolithiasis

Author: Vincent Frochot, Jean-Philippe Haymann, Michel Daudon, Dominique Bazin, Emmanuel Letavernier, Arnaud Dessombz, Paul Jungers, Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre de Recherche des Cordeliers (CRC), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Département de Néphrologie [CHU Necker], CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), d'Eggis, Gilles, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ), Service des Explorations Fonctionnelles, Assistance publique - Hôpitaux de Paris (AP-HP)-CHU Tenon [APHP], Laboratoire de Physique des Solides ( LPS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Recherche des Cordeliers ( CRC ), Université Paris Diderot - Paris 7 ( UPD7 ) -École pratique des hautes études ( EPHE ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Assistance publique - Hôpitaux de Paris (AP-HP)-CHU Necker - Enfants Malades [AP-HP], Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), and Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE)
Subjects: [ SDV.MHEP.UN ] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Morphology, medicine.medical_specialty, Chemistry(all), Etiology, General Chemical Engineering, Urinary system, 030232 urology & nephrology, Calcium oxalate, Urine, Gastroenterology, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Primary hyperoxaluria, 03 medical and health sciences, chemistry.chemical_compound, [ CHIM.CRIS ] Chemical Sciences/Cristallography, 0302 clinical medicine, Distal renal tubular acidosis, Urolithiasis, Internal medicine, medicine, [CHIM.CRIS]Chemical Sciences/Cristallography, Hypercalciuria, [CHIM.CRIS] Chemical Sciences/Cristallography, Drugs, General Chemistry, Morpho-constitutional analysis, medicine.disease, [SDV.MHEP.UN] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, 3. Good health, Steatorrhea, chemistry, Biochemistry, Calcium phosphate, Purines, 030220 oncology & carcinogenesis, Chemical Engineering(all), Uric acid, Cystine, medicine.symptom, Stone analysis
Abstract: International audience; The generalized use of physical methods, X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) decisively improved urinary stone analysis by allowing to accurately identify the chemical nature, crystalline phases and relative proportions of stone constituents. Such compositional analysis is sufficient to identify stone diseases involving a single specific component such as cystine, 2,8-dihydroxyadenine (DHA), struvite, uric acid, ammonium hydrogen urate or a drug. However, for common calcium nephrolithiasis, which represents by far the largest part of urinary stones throughout the world, the simple identification of calcium oxalate (CaOx) and/or calcium phosphate (CaP) as constituents provides incomplete etiologic information because a same elemental stone composition may result from different lithogenic processes.A more comprehensive method combining careful morphologic examination of the surface and the section of stones with detailed FTIR analysis of the nature, location, crystalline phases and a respective proportion of stone constituents, therefore termed ‘morpho-constitutional’ analysis, as used in our laboratory for four decades provides more complete etiologic information. In common idiopathic CaOx nephrolithiasis, the predominance of the monohydrate form (COM) was shown to be associated with elevated urine Ox concentration, whereas the dihydrate form (COD) was associated with hypercalciuria, thus orienting dietary and/or pharmacological intervention. A major contribution of the method is to immediately orient the diagnosis of rare, but severe, diseases leading to a loss of renal function, when stone analysis reveals a peculiar morphology of common constituents. The most salient examples are the type Ic morphology of COM stones, pathognomonic of primary hyperoxaluria, type Ie morphology, which is highly suggestive of absorptive hyperoxaluria as seen in inflammatory bowel diseases and pathologies inducing steatorrhea, type IIId morphology of ammonium urate stones, which orientates towards chronic diarrhea with dietary imbalance and loss of electrolytes, and type IVa2 morphology of carbapatite, specific of distal renal tubular acidosis of congenital or acquired origin, and distinctive aspect of 2,8-DHA stones. In conclusion, the proposed morpho-constitutional method should be recommended for routine stone analysis, inasmuch as it is simple, rapid, reliable, clinically relevant and cost-effective.
Published: 2016

8. Structural elucidation of silica present in kidney stones coming from Burkina Faso

Author: Dessombz, Arnaud, Coulibaly, Gérard, Kirakoya, Brahima, Ouedraogo, Richard W., Lengani, Adama, Rouziere, Stéphan, Weil, Raphael, Picaut, Lise, Bonhomme, Christian, Babonneau, Florence, Bazin, Dominique, Daudon, Michel, Centre de Recherche des Cordeliers ( CRC ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -École pratique des hautes études ( EPHE ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Laboratoire de Physique des Solides ( LPS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre Hospitalier Universitaire Yalgado Ouédraogo ( CHUYO ), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [APHP]-Assistance publique - Hôpitaux de Paris - AP-HP (FRANCE), Centre de Recherche des Cordeliers (CRC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre Hospitalier Universitaire Yalgado Ouédraogo (CHUYO), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)
Subjects: Component, [ SDV.MHEP.UN ] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Urolithiasis, Kidney stones, Burkina Faso, Opaline silica, Structure, Lithiase urinaire, Calculs rénaux, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Silice opaline, Composant
Abstract: International audience; Hundred kidney stones obtained from the University Hospital of Ouagadougou (Burkina Faso) were finally characterized by a panel of complementary spectroscopic and diffraction tools. The most surprising result is the high occurrence of opaline silica as a component in these kidney stones. Opaline silica is a scarce mineral phase in renal calcification; however, we found that at least 48% of the stones had a detectable proportion of silica. SEM images demonstrate the presence of micrometric objects (of spheroidal shape) in close association with monohydrated calcium oxalate crystals. X-ray fluorescence, XRD and 29Si solid state MAS NMR demonstrate unambiguously the presence of amorphous silica, whose composition is comparable to that of natural opals. As NMR is a local spectroscopic probe, other nuclei can be probed. We demonstrate that traces of aluminium are present in the kidney stones by using 27Al solid state MAS NMR. These experiments may offer the first clues of pathological processes that are responsible for these stones.; Cent calculs rénaux obtenus du CHU de Ouagadougou (Burkina Faso) ont été caractérisés par une série d'outils spectroscopiques et de diffraction complémentaires. Le résultat le plus marquant a été la très haute prévalence de la silice opaline comme composant de ces calculs. La silice opaline est un composant rare des calculs rénaux. Cependant, nous l'avons trouvée dans près de 48% des calculs, dans des proportions suffisantes pour être détectables par analyse infrarouge. Les images au MEB démontrent la présence d'objets micrométriques (de forme sphérique) en association intime avec des cristaux d'oxalate de calcium monohydraté. La fluorescence des rayons X, la diffraction des rayons X et la RMN du solide du 29Si démontrent sans ambiguïté la présence de silice amorphe, de manière comparable au cas des opales naturelles. Comme la RMN est une sonde spectroscopique locale, d'autres noyaux peuvent être détectés. Nous avons ainsi démontré que des traces d'aluminium sont présentes dans les calculs rénaux étudiés en utilisant la RMN du solide du noyau 27 Al. Ces expériences peuvent offrir les premiers éléments de réponse concernant le processus pathologique conduisant à la formation de ces calculs.
Published: 2016

9. High Prevalence of Opaline Silica in Urinary Stones From Burkina Faso

Author: Brahima Kirakoya, Dominique Bazin, Raphael Weil, Gérard Coulibaly, Richard W. Ouedraogo, Lise Picaut, Michel Daudon, Arnaud Dessombz, Centre de Recherche des Cordeliers (CRC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre Hospitalier Universitaire Yalgado Ouédraogo (CHUYO), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), ``Once Upon a Tooth' IDEX [ANR-11-IDEX-0005-02], ANR Nanoshap [ANR-09-BLAN-0120-02], Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Tenon [APHP], Centre de Recherche des Cordeliers ( CRC ), Université Paris Diderot - Paris 7 ( UPD7 ) -École pratique des hautes études ( EPHE ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Laboratoire de Physique des Solides ( LPS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre Hospitalier Universitaire Yalgado Ouédraogo ( CHUYO ), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), and CHU Tenon [APHP]-Assistance publique - Hôpitaux de Paris - AP-HP (FRANCE)
Subjects: medicine.medical_specialty, High prevalence, business.industry, Cross-sectional study, Urology, Urinary system, Urinary stone, Calcium oxalate, [CHIM.MATE]Chemical Sciences/Material chemistry, medicine.disease, University hospital, 3. Good health, Surgery, chemistry.chemical_compound, chemistry, [ CHIM.MATE ] Chemical Sciences/Material chemistry, medicine, Opaline silica, Kidney stones, business, Demography
Abstract: International audience; OBJECTIVE To underline peculiar composition of kidney stones and to propose an epidemiologic study of urinary stones in West African countries, where epidemiologic studies are scarce. Only few data are available regarding stone composition in sub-Saharan countries. Recently, a set of 100 stones consecutively removed by surgery in the Department of Urology of the University Hospital of Ouagadougou in Burkina Faso were collected for physical analysis, which provided the opportunity to obtain an epidemiologic profile of stone composition in this country. MATERIALS AND METHODS A total of 100 stones from 64 men, 22 women, 10 boys, and four girls were analyzed by morphologic examination, infrared spectroscopy, and electron microscopy in our laboratory. The results were considered by sex and separately for adults and children. RESULTS Sixty-five percent of the 100 stones contained calcium oxalate as the main component. Interestingly, the second main component was opaline silica (18%). Furthermore, opaline silica was identified in any proportion in 48% of the stones. The prevalence was sex and age dependent. Opaline silica was detected as the main component in 42% of the nuclei, which underlines its role as one of the main components involved in the initiation of calculi in this country. CONCLUSION For the first time, a dramatically high occurrence of a ``scarce'' urinary stone component, namely opaline silica, was reported in a series of consecutive calculi from a single country. We propose that a regular consumption of clay could be the origin of this phenomenon in these populations.
Published: 2015

10. High Prevalence of Opaline Silica in Urinary Stones From Burkina Faso REPLY

Author: Dessombz, Arnaud, Bazin, Dominique, Daudon, Michel, Centre de Recherche des Cordeliers (CRC), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Centre de Recherche des Cordeliers ( CRC ), Université Paris Diderot - Paris 7 ( UPD7 ) -École pratique des hautes études ( EPHE ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Université Paris Descartes - Paris 5 ( UPD5 ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Laboratoire de Physique des Solides ( LPS ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), CHU Tenon [APHP]-Assistance publique - Hôpitaux de Paris - AP-HP (FRANCE), Université Paris Diderot - Paris 7 (UPD7)-École pratique des hautes études (EPHE)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), and Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Tenon [APHP]
Subjects: [ CHIM.MATE ] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract: International audience; no abstract
Published: 2015

11. Structure of Bolaamphiphile Sophorolipid Micelles Characterized with SAXS, SANS, and MD Simulations

Author: Stéphane Abel, Sabine Manet, Claire Valotteau, G. C. Fadda, Niki Baccile, Esra Karakas, Javier Pérez, Anne-Sophie Cuvier, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Bioénergétique Membranaire et Stress (LBMS), Département Biochimie, Biophysique et Biologie Structurale (B3S), Institut de Biologie Intégrative de la Cellule (I2BC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Biologie Intégrative de la Cellule (I2BC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Maison de la Simulation (MDLS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut National de Recherche en Informatique et en Automatique (Inria)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé ( SMiLES ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Collège de France ( CdF ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Léon Brillouin ( LLB - UMR 12 ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ), Synchrotron SOLEIL ( SSOLEIL ), Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Bioénergétique, Métalloprotéines et Stress ( LBMS ), Département Biochimie, Biophysique et Biologie Structurale ( B3S ), Institut de Biologie Intégrative de la Cellule ( I2BC ), Université Paris-Sud - Paris 11 ( UP11 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ) -Université Paris-Sud - Paris 11 ( UP11 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ) -Institut de Biologie Intégrative de la Cellule ( I2BC ), Université Paris-Sud - Paris 11 ( UP11 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ) -Université Paris-Sud - Paris 11 ( UP11 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ), Maison de la Simulation ( MDLS ), Centre National de la Recherche Scientifique ( CNRS ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Université Paris-Sud - Paris 11 ( UP11 ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ), Université Paris-Sud - Paris 11 ( UP11 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Small-angle X-ray scattering, Chemistry, Sophorolipid, Bolaamphiphile, Shell (structure), [CHIM.MATE]Chemical Sciences/Material chemistry, Neutron scattering, Micelle, Surfaces, Coatings and Films, Molecular dynamics, Crystallography, Pulmonary surfactant, [ CHIM.MATE ] Chemical Sciences/Material chemistry, Materials Chemistry, Physical and Theoretical Chemistry
Abstract: International audience; The micellar structure of sophorolipids, a glycolipid bolaamphiphile, is analyzed using a combination of small-angle X-ray scattering (SAXS), small-angle neutron scattering (SANS), and molecular dynamics (MD) simulations. Numerical modeling of SAXS curves shows that micellar morphology in the noncharged system (pH< 5) is made of prolate ellipsoids of revolution with core–shell morphology. Opposed to most surfactant systems, the hydrophilic shell has a nonhomogeneous distribution of matter: the shell thickness in the axial direction of the ellipsoid is found to be practically zero, while it measures about 12 Å at its cross-section, thus forming a “coffee bean”-like shape. The use of a contrast-matching SANS experiment shows that the hydrophobic component of sophorolipids is actually distributed in a narrow spheroidal region in the micellar core. These data seem to indicate a complex distribution of sophorolipids within the micelle, divided into at least three domains: a pure hydrophobic core, a hydrophilic shell, and a region of less defined composition in the axial direction of the ellipsoid. To account for these results, we make the hypothesis that sophorolipid molecules acquire various configurations within the micelle including bent and linear, crossing the micellar core. These results are confirmed by MD simulations which do show the presence of multiple sophorolipid configurations when passing from spherical to ellipsoidal aggregates. Finally, we also used Rb+ and Sr2+ counterions in combination with anomalous SAXS experiments to probe the distribution of the COO– group of sophorolipids upon small pH increase (5 < pH < 7), where repulsive intermicellar interactions become important. The poor ASAXS signal shows that the COO– groups are rather diffused in the broad hydrophilic shell rather than at the outer micellar/water interface.
Published: 2015

12. From lab to market: An integrated bioprocess design approach for new-to-nature biosurfactants produced byStarmerella bombicola

Author: Bernd Everaert, Wim Soetaert, Niki Baccile, Christian V. Stevens, Lisa Van Renterghem, Sophie Roelants, Sam Debrouwer, Stein Mincke, Kristel Scholtens, Marie Claire Leona Hilda Taelman, Sam Ledegen, Katrijn Uyttersprot, Universiteit Gent = Ghent University [Belgium] (UGENT), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Bio Base Europe Pilot Plant
Subjects: 0301 basic medicine, Delta, Technology and Engineering, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Magnetic Resonance Spectroscopy, Stereochemistry, Starmerella, Fatty alcohol, fermentation and purification, Bioengineering, Applied Microbiology and Biotechnology, Surface-Active Agents, 03 medical and health sciences, chemistry.chemical_compound, BOLAAMPHIPHILES, SOPHOROLIPID BIOSURFACTANTS, [CHIM]Chemical Sciences, YEAST, CANDIDA-BOMBICOLA, Bioprocess, chemistry.chemical_classification, IDENTIFICATION, Strain (chemistry), biology, Sophorolipid, Biology and Life Sciences, biosurfactant, Glycosidic bond, biology.organism_classification, GENE, Yeast, sophorolipid, 030104 developmental biology, Metabolic Engineering, chemistry, Saccharomycetales, strain engineering, application testing, Fatty Alcohols, Glycolipids, Gene Deletion, LIPIDS, Biotechnology
Abstract: Glycolipid microbial biosurfactants, such as sophorolipids (SLs), generate high industrial interest as 100% biobased alternatives for traditional surfactants. A well-known success story is the efficient SL producer Starmerella bombicola, which reaches titers well above 200g/L. Recent engineering attempts have enabled the production of completely new types of molecules by S. bombicola, e.g. the bolaform SLs. Scale-up of bolaform SL production was performed at 150L scale. The purified product was evaluated in detergent applications, as classic SLs are mostly applied in eco-friendly detergents. In this paper, we show that they can be used as green and non-irritant surfactants in for example (automatic) dishwashing applications. However, due to the presence of an ester function in the biosurfactant molecule a limited chemical stability at higher pH values (>6.5) was noticed, (therefore called 'non-symmetrical' (nsBola)) which, is a major drawback that will most likely inhibit market introduction. An integrated bioprocess design (IBPD) strategy was thus applied to resolve this issue. The strategy was to replace the fed fatty acids with fatty alcohols, to generate so-called "symmetrical bolaform (sBola) sophorosides (SSs)," containing two instead of one glycosidic bond. Next to a change in feeding strategy, the blocking of the fatty alcohols from metabolizing/oxidizing through the suggested omega-oxidation pathway was necessary. For the latter, two putative fatty alcohol oxidase genes (fao1 and fao2) were identified in the S. bombicola genome and deleted in the bolaform SL producing strain (Delta at Delta sble). Shake flask experiments for these new strains (Delta at Delta sble Delta fao1 and Delta at Delta sble Delta fao2) were performed to evaluate if the fed fatty alcohols were directly implemented into the SL biosynthesis pathway. Indeed, sBola sophorosides (SSs) production up to 20 g/L was observed for the Delta at Delta sble Delta fao1 strain. Unexpectedly, the Delta at Delta sble Delta fao2 strain only produced minor amounts of sBola sophorosides (SSs), and mainly nsBola SLs (alike the parental Delta at Delta sble strain). The sBola sophorosides (SSs) were purified and their symmetrical structure was confirmed by NMR. They were found to be significantly more stable at higher pH, opening up the application potential of the biosurfactant by enhancing its stability properties.
Published: 2018

13. Stabilization of Collagen Fibrils by Gelatin Addition: A Study of Collagen/Gelatin Dense Phases

Author: Claire Teulon, Gervaise Mosser, François Portier, Flavien Guenneau, Agnieszka Nowacka-Perrin, Marie-Claire Schanne-Klein, Matériaux et Biologie (MATBIO), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Laboratoire d'Optique et Biosciences (LOB), École polytechnique (X)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and HAL-UPMC, Gestionnaire
Subjects: collagen, [CHIM.POLY] Chemical Sciences/Polymers, food.ingredient, Materials science, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Gelatin, gelatin, Biopolymers, food, Microscopy, Electron, Transmission, Liquid crystal, Phase (matter), Lyotropic, Microscopy, Polymer chemistry, Electrochemistry, General Materials Science, liquid crystal, Spectroscopy, Polarized light microscopy, Mesophase, self-assembly, Surfaces and Interfaces, 021001 nanoscience & nanotechnology, Condensed Matter Physics, [PHYS.COND.CM-SCM] Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], Extracellular Matrix, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, Chemical engineering, Transmission electron microscopy, 0210 nano-technology, [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], biomaterials
Abstract: International audience; Collagen and its denatured form, gelatin, are biopolymers of fundamental interest in numerous fields ranging from living tissues to biomaterials, food, and cosmetics. This study aims at characterizing mixtures of those biopolymers at high concentrations (up to 100 mg·mL–1) at which collagen has mesogenic properties. We use a structural approach combining polarization-resolved multiphoton microscopy, polarized light microscopy, magnetic resonance imaging, and transmission electron microscopy to analyze gelatin and collagen/gelatin dense phases in their sol and gel states from the macroscopic to the microscopic scale. We first report the formation of a lyotropic crystal phase of gelatin A and show that gelatin must structure itself in particles to become mesogenic. We demonstrate that mixtures of collagen and gelatin phase segregate, preserving the setting of the pure collagen mesophase at a gelatin ratio of up to 20% and generating a biphasic fractal sample at all tested ratios. Moreover, differential scanning calorimetric analysis shows that each protein separates into two populations. Both populations of gelatins are stabilized by the presence of collagen, whereas only one population of collagen molecules is stabilized by the presence of gelatin, most probably those at the interface of the fibrillated microdomains and of the gelatin phase. Although further studies are needed to fully understand the involved mechanism, these new data should have a direct impact on the bioengineering of those two biopolymers.
Published: 2017

14. Antibacterial properties of sophorolipid-modified gold surfaces against Gram positive and Gram negative pathogens

Author: Claire Valotteau, Vincent Humblot, Niki Baccile, Helen Lydon, Christopher A. Mitchell, Roger Marchant, Ibrahim M. Banat, Florence Babonneau, Claire-Marie Pradier, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), School of Biomedical Sciences, University of Ulster, ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Salmonella typhimurium, 0301 basic medicine, Gram-negative bacteria, Streptococcus pyogenes, Gram-positive bacteria, Sophorolipid, antibacterial surface, Microbial Sensitivity Tests, Gram-Positive Bacteria, 010402 general chemistry, medicine.disease_cause, 01 natural sciences, Microbiology, membrane- damaging activity, 03 medical and health sciences, Colloid and Surface Chemistry, Staphylococcus epidermidis, Gram-Negative Bacteria, Escherichia coli, medicine, Physical and Theoretical Chemistry, biology, self-assembled monolayers, Surfaces and Interfaces, General Medicine, Antimicrobial, biology.organism_classification, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Anti-Bacterial Agents, 0104 chemical sciences, 030104 developmental biology, Pseudomonas aeruginosa, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Gold, Glycolipids, Listeria ivanovii, Antibacterial activity, Biotechnology
Abstract: International audience; Sophorolipids are bioderived glycolipids displaying interesting antimicrobial properties. We show that they can be used to develop biocidal monolayers against Listeria ivanovii, a Gram-positive bacterium. The present work points out the dependence between the surface density and the antibacterial activity of grafted sophorolipids. It also emphasizes the broad spectrum of activity of these coatings, demonstrating their potential against both Gram-positive strains (Enteroccocus faecalis, Staphylococcus epidermidis, Streptococcus pyogenes) and Gram-negative strains (Escherichia coli, Pseudomonas aeruginosa and Salmonella typhymurium). After exposure to sophorolipids grafted onto gold, all these bacterial strains show a significant reduction in viability resulting from membrane damage as evidenced by fluorescent labelling and SEM-FEG analysis.
Published: 2017

15. Optical microalgal biosensors for aqueous contaminants using organically doped silica as cellular hosts

Author: Roberta Brayner, Claude Yéprémian, Nada Ben Ahmed, Jean-Yves Piquemal, Guillaume Laurent, Sylvie Masse, Thibaud Coradin, Matériaux et Biologie (MATBIO), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS (UMR_7086)), Université Paris Diderot - Paris 7 (UPD7)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Molécules de Communication et Adaptation des Micro-Organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), French Ministry for Superior Education and Research, Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), and Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Euglena gracilis, Colloidal silica, ved/biology.organism_classification_rank.species, Biosensing Techniques, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, Biochemistry, Analytical Chemistry, chemistry.chemical_compound, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Microalgae, Water Pollutants, 0105 earth and related environmental sciences, Pollutant, Anthracene, Aqueous solution, Nanocomposite, ved/biology, Contaminated water, Silicon Dioxide, 021001 nanoscience & nanotechnology, 6. Clean water, Biosensors, chemistry, Chemical engineering, Environmental chemistry, Hybrid materials, 0210 nano-technology, Hybrid material, Biosensor
Abstract: International audience; Optical biosensors for the detection of toxic species in aqueous media were developed via the encapsulation of microalgae in sol-gel matrices. In a first step, the effect of cadmium(II), lead(II) and anthracene on the chlorophyll a fluorescence intensity of Anabaena flos-aquae, Chorella vulgaris and Euglena gracilis microalgae in suspension was studied. Complementary ATP-metry measurements demonstrated a direct relationship between optical response and pollutant toxicity, in a cell- and dose-dependent manner. In a second step, microalgae were successfully encapsulated in silicate/colloidal silica nanocomposite matrices. However a complete loss of cell response to pollutant addition was observed, despite the preservation of cell viability. Introduction of low amount (5 mol%) of amine- or ethyl-bearing silanes in the matrix formulation allowed for the recovery of the sensing capacity of the immobilized microalgae, without impacting on the response time (30 s). Porosimetry and 29 Si Solid State NMR showed that the organic moieties are fully integrated into the inorganic network, tuning the ability of the target pollutant to diffuse and reach the encapsulated algae. This versatile strategy could be useful for the easy and fast assessment of contamination levels in polluted waters.
Published: 2017

16. Cysteine-montmorillonite composites for heavy metal cation complexation: A combined experimental and theoretical study

Author: Jean-François Lambert, Khaled El Adraa, Thomas Georgelin, Frederik Tielens, Maguy Jaber, Farouk Jaber, Chemistry, Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Réactivité de Surface (LRS), Laboratoire d'Analyse des Composés Organiques, Université Libanaise, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: General Chemical Engineering, Inorganic chemistry, Composite number, 02 engineering and technology, 010402 general chemistry, DFT, 01 natural sciences, Industrial and Manufacturing Engineering, Metal, chemistry.chemical_compound, Adsorption, [CHIM]Chemical Sciences, Environmental Chemistry, Cysteine, Heavy metal cations, Composite material, Fourier transform infrared spectroscopy, Montmorillonite, Chemistry, General Chemistry, 021001 nanoscience & nanotechnology, NMR, 0104 chemical sciences, visual_art, visual_art.visual_art_medium, Density functional theory, 0210 nano-technology, Clay minerals, Hybrid material
Abstract: International audience; Green composites based on montmorillonite (Mt) and cysteine, were prepared for heavy metal removal. A comparison between the adsorption properties of the resulting hybrid inorganic-organic materials and the pure montmorillonite was carried out for the following heavy metal cations Cd2+, Hg2+, Pb2+, Co2+ and Zn2+. It appears that the adsorption capacity is higher on the composite. Moreover, in release experiments, the heavy metal cations are more strongly retained by the hybrid material. Interactions between the hybrid clay mineral and the inorganic hosts were studied by spectroscopic methods such as solid-state NMR (Nuclear Magnetic Resonance) and FTIR (Fourier Transform Infrared). The experimental data were in agreement with the theoretical periodic DFT (Density Functional Theory) calculations where a molecular picture of the adsorption complex is proposed.
Published: 2017

17. Insights on hydride formation over cerium-gallium mixed oxides: A mechanistic study for efficient H2 dissociation

Author: Olivier Matz, Ginesa Blanco, Christel Gervais, Adrian Lionel Bonivardi, Sebastián E. Collins, Miguel Angel Baltanas, Julia Vecchietti, Monica Calatayud, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Laboratoire de Chimie de la Matière Condensée de Paris (site ENSCP) (LCMCP (site ENSCP)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie théorique (LCT), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Universidad Nacional del Litoral (CAID) [PI PI 501 201101 00311], ANPCyT [PICT-2012-1280, PICT-2014-0497], CONICET [PIP-2014-086], GENCI-CINES/IDRIS [2015-x2015082131, 2016-x2016082131], French Region Ile de France - SESAME program, Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: HYDROGEN ACTIVATION, Alkyne hydrogenation, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, DFT, 01 natural sciences, 7. Clean energy, Medicinal chemistry, Catalysis, Ga2O3, Ceria, Gallia, Physical and Theoretical Chemistry, CATALYSIS, Hydride, SURFACES, Otras Ciencias Químicas, Ciencias Químicas, INFRARED, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Cerium, chemistry, Alkane dehydrogenation, Hydrogen activation, Physical chemistry, Time-resolved infrared spectroscopy, 0210 nano-technology, CIENCIAS NATURALES Y EXACTAS, CeO2
Abstract: A four-step reaction mechanism is proposed for the H2 dissociation over pure ceria and Gallium promoted mixed oxide materials, in a combined experimental and computational investigation. Two samples of cerium-gallium mixed oxides with Ce/Ga atomic ratios equal to 90/10 and 80/20 were studied by time-resolved diffuse reflectance infrared spectroscopy under H2 (D2) flow at isothermal condition in the range of 523?623 K. X-ray photoelectron spectrometry allowed to conclude that only Ce4+ is reduced to Ce3+ (Ga3+ is not reduced), in agreement with density functional theory (DFT) results. The time evolution profiles of gallium hydride ðGaAHÞ species, hydroxyl groups (OH) and Ce3+ infrared signals were analyzed and kinetic rate parameters for each step were obtained by mathematical modeling. The values for activation energies were in agreement with those calculated by DFT, for the different elementary pathways. A small activation energy (4 kcal/mol) was found for H2 dissociation found on GaOCe sites assuming that the heterolytic cleavage of the HAH bond is the rate determining step. On pure ceria, the experimental activation energy is 23 kcal/mol, showing that the addition of Ga3+ cations boosts the splitting of H2. Interestingly, the reduction step of pure CeO2 surface domains seems to proceed via a CeH/OH pair intermediate, according to DFT calculations. Moreover, 71Ga NMR experiments indicatethe possible presence of gallia nanodomains. It is proposed that the generation of Ga OACe sites in the perimeter of such surface gallia nanodomains is responsible for the enhanced reactivity of the mixed materials. The key role of this new type of sites to improve the efficiency of relevant catalytic reactions such as selective alkyne hydrogenation and light alkane dehydrogenation is then analyzed. Fil: Vecchietti, María Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina Fil: Baltanas, Miguel Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina Fil: Gervais, Christel. Universite de Paris VI; Francia Fil: Collins, Sebastián Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina Fil: Blanco. Ginesa. Universidad de Cádiz; España Fil: Matz, Olivier. Universite de Paris VI; Francia Fil: Calatayud, Monica. Universite de Paris VI; Francia Fil: Bonivardi, Adrian Lionel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Published: 2017

18. Glucosomes: Glycosylated vesicle-in-vesicle aggregates in water from pH-responsive microbial glycolipid

Author: Inge N. A. Van Bogaert, Sophie Roelants, Bernd Everaert, Wim Soetaert, Patrick Le Griel, Niki Baccile, Sylvain Prévost, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Bio Base Europe Pilot Plant, Department of Biochemical and Microbial Technology, Universiteit Gent = Ghent University [Belgium] (UGENT), Universiteit Gent = Ghent University (UGENT), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: glycolipids, SOPHOROLIPIDS, bolaforms, Bolaamphiphile, 02 engineering and technology, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, 010402 general chemistry, 01 natural sciences, Micelle, surfactants, BOGORIENSIS, Glycolipid, BIOSURFACTANTS, DRUG-DELIVERY, Lipid bilayer, vesosomes, Liposome, MICELLES, BOLAAMPHIPHILE, Full Paper, Chemistry, Vesicle, Sophorolipid, Biology and Life Sciences, MIXTURES, self-assembly, General Chemistry, SELF-ASSEMBLIES, Full Papers, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Crystallography, Membrane, [SDV.SP.PG]Life Sciences [q-bio]/Pharmaceutical sciences/Galenic pharmacology, Biophysics, COMPLEMENTARY LIPOSOMES, 0210 nano-technology, SENSITIVE LIPOSOMES
Abstract: International audience; Vesicle-in-vesicle self-assembled containers, or vesosomes, are promising alternatives to liposomes because of their possible hierarchical encapsulation and high stability. We report herein the first example of sugar-based vesicles-in-vesicles, which we baptize glucosomes. These were prepared by using a natural microbial glycolipid (branched C22 sophorolipid) extracted from the culture medium of the yeast Pseudohyphozyma bogoriensis. Glucosomes spontaneously formed in water between pH 6 and pH 4 at room temperature, without the requirement of any additive. By means of pH-resolved in situ small angle X-ray scattering, we provided direct evidence for the vesicle-formation mechanism. Statistical treatment of the vesicle radii distribution measured by cryo-tansmission electron microscopy by using a derived form of the Helfrich bending free-energy expression provided an order of magnitude for the effective bending constant (the sum of the curvature and the saddle-splay moduli) of the lipid membrane to K=(0.4±0.1) kBT. This value is in agreement with the bending constant measured for hydrocarbon-based vesicles membranes.
Published: 2017

19. Nanocomposites through the Chemistry of Single-Source Precursors: Understanding the Role of Chemistry behind the Design of Monolith-Type Nanostructured Titanium Nitride/Silicon Nitride

Author: Christel Gervais, Mirna Chaker Bechelany, Vanessa Proust, Samuel Bernard, Sylvie Malo, Philippe Miele, Abhijeet Lale, Institut Européen des membranes (IEM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de cristallographie et sciences des matériaux (CRISMAT), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), French Rhone-Alpes council (Cible project) [1897], CEFIPRA agency [5108-1], CNRS, DGA, national research group ``Matinex', French Region Ile de France-SESAME program, Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Silicon, Thermogravimetric analysis, Processability, Inorganic chemistry, chemistry.chemical_element, 02 engineering and technology, Nitride, 010402 general chemistry, 01 natural sciences, Precursor chemistry, Catalysis, chemistry.chemical_compound, symbols.namesake, Titanium, Nanocomposite, Organic Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, 021001 nanoscience & nanotechnology, Titanium nitride, Nanostructures, 0104 chemical sciences, Amorphous solid, Silicon nitride, chemistry, Chemical engineering, symbols, 0210 nano-technology, Tin, Raman spectroscopy
Abstract: International audience; Monolith-type titanium nitride/silicon nitride nanocomposites, denoted as TiN/Si3N4, have been prepared by a reaction of polysilazanes with a titanium amide precursor, warm pressing of the resultant polytitanosilazanes, and subsequent pyrolysis of the green bodies at 1400 degrees C. Initially, a series of polytitanosilazanes was synthesized and the role of the chemistry behind their synthesis was studied in detail by using solid-state NMR spectroscopy, elemental analysis, and molecular-weight measurements. The intimate relationship between the chemistry and the processability of these precursors is discussed. Polytitanosilazanes display the appropriate requirements for facile processing in solution and as a melt, but they must be treated with liquid ammonia to be adapted for solid-state processing, that is, warm-pressing, to design dense and mechanically stable structures after pyrolysis. We provide a comprehensive mechanistic study of the nanocomposite conversion based on solid-state NMR spectroscopy coupled with thermogravimetric experiments. HRTEM images coupled with XRD and Raman spectroscopy confirmed the unique nanostructural features of the nanocomposites, which appear to be a result of the molecular origin of the materials. The as-obtained samples are composed of an amorphous Si3N4 matrix, in which TiN nanocrystals are homogeneously formed in situ in the matrix during the process. The hardness and Young moduli were measured and are discussed.
Published: 2016

20. L’étude de la cristallurie améliore le diagnostic et la prise en charge thérapeutique de la lithiase rénale

Author: Vincent Frochot, Paul Jungers, Dominique Bazin, Michel Daudon, Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Tenon [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Département de Néphrologie [CHU Necker], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), and d'Eggis, Gilles
Subjects: Crystalluria, medicine.medical_specialty, Chemistry(all), Global crystal volume, General Chemical Engineering, 030232 urology & nephrology, Calcium oxalate, Urology, Renal function, Uric acids, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Primary hyperoxaluria, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Cristallurie, Oxalates de calcium, medicine, Hypercalciuria, 030212 general & internal medicine, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], Crystalluria index, [SDV.BBM.BC] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], Pathological, Index cristallurique, business.industry, Dihydroxyadenine, Acides uriques, General Chemistry, Cystinuria, medicine.disease, [SDV.MHEP.UN] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Dihydroxyadénine, 3. Good health, Volume cristallin global, chemistry, Hereditary Diseases, Chemical Engineering(all), Cystine, medicine.symptom, business, Calcium oxalates
Abstract: The search for crystalluria and morphologic analysis of urinary crystals is of interest in the diagnostic evaluation and assessment of efficacy of therapeutic strategies in stone formers. In common calcium oxalate (CaOx) nephrolithiasis, identification of the monohydrate or dihydrate form of CaOx orients toward hyperoxaluria or hypercalciuria as the main lithogenic mechanism, respectively. An unusual high abundance of crystals exclusively made of CaOx monohydrate is highly suggestive of primary hyperoxaluria, the most severe of all types of renal stone diseases. The identification of crystal species such as struvite, cystine, 2,8-dihydroxyadenine, which are not found in normal urine, is indicative of specific pathological conditions, namely, infection stones and hereditary diseases such as cystinuria and dihydroxyadeninuria. Such diseases expose to progressive loss of renal function unless they are prevented by specific therapeutic measures. The presence of crystals made of drugs may entail the risk of kidney dysfunction because of crystallization of the drug or its metabolites.Serial determination of crystalluria, which reflects the activity of stone disease and its response to therapeutic measures, is of major interest in the follow-up of patients suffering from nephrolithiasis. It should be more largely used in clinical practice in most stone formers, still more for the surveillance of patients affected by severe, hereditary renal stone diseases such as primary hyperoxaluria, cystinuria, and dihydroxyadeninuria, where determination of the global crystal volume allows assessing the efficacy of therapeutic measures and optimizing the medical management of the patients., L’étude de la cristallurie et de ses caractéristiques qualitatives et quantitatives est d'un intérêt clinique majeur pour le diagnostic de la maladie lithiasique et l’évaluation de l'efficacité des mesures thérapeutiques proposées aux patients. Dans la lithiase oxalocalcique commune, la forme cristalline, whewellite ou weddellite, oriente respectivement vers une hyperoxalurie ou une hypercalciurie. Une quantité élevée de cristaux de whewellite traduit une forte hyperoxalurie et doit faire rechercher une hyperoxalurie primaire. L'identification de cristaux particuliers tels que la struvite, la cystine, la dihydroxy-2,8-adénine permet le diagnostic de pathologies spécifiques qui exposent à une altération progressive de la fonction rénale lorsqu'elles ne sont pas traitées précocement par des mesures adaptées. La présence de cristaux médicamenteux peut expliquer l'origine d'une insuffisance rénale aiguë développée sous traitement.Au cours du suivi des patients souffrant de lithiase, la détermination de la cristallurie sur des prélèvements sériés est d'un grand intérêt pour la prévention du risque de récidive de calculscar elle reflète l'activité de la maladie lithiasique et sa réponse aux mesures diététiques et thérapeutiques. Elle peut donc bénéficier à la plupart des patients lithiasiques. Elle se doit d’être réalisée chez tout patient souffrant d'une forme héréditaire sévère de lithiase telle que cystinurie, hyperoxalurie primaire ou dihydroxyadéninurie pour en optimiser la prise en charge thérapeutique, la détermination du volume cristallin global dans ces pathologies cristallines sévères permettant d'adapter le traitement médical, d’évaluer l'efficacité des mesures thérapeutiques proposées et de modifier celles-ci en fonction des résultats obtenus.
Published: 2016

21. Randall’s plaque and kidney stones: Recent advances and future challenges

Author: Emmanuel Letavernier, Michel Daudon, Dominique Bazin, Administateur, HAL Sorbonne Université, Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)
Subjects: 0301 basic medicine, Pathology, medicine.medical_specialty, Chemistry(all), General Chemical Engineering, Calcium oxalate kidney stones, 030232 urology & nephrology, Calcium oxalate, chemistry.chemical_element, Calcium, Kidney, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Oxalate, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Interstitial tissue, medicine, Randall’s plaque, General Chemistry, medicine.disease, [SDV.MHEP.UN] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, 3. Good health, 030104 developmental biology, medicine.anatomical_structure, chemistry, Randall's plaque, Calcium Oxalate Crystals, Chemical Engineering(all), Kidney stones
Abstract: International audience; Alexander Randall described eight decades ago a heterogeneous nucleation process at the tip of renal papillae giving birth to calcium oxalate stones. Kidney stones were for the first time described to originate from calcium phosphate plaques growing in the interstitial tissue, breaking urothelium and then promoting calcium oxalate crystals aggregation at their contact. During the next decades, few studies were dedicated to these Randall's plaques but the increasing incidence of calcium oxalate kidney stones, the development of endoscopic procedures allowing plaques visualization and series evidencing the high proportion of calcium oxalate stones generated on these plaques renewed interest in Randall's plaque. Although some progress has been carried during the past two decades, the origin of Randall' plaques, their composition, their role in kidney stones epidemic, their specific affinity for some crystalline phases, and their potential deleterious effects in kidney tissues are among the challenges that lie ahead.
Published: 2016
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22. Type 2 diabetes and uric acid stones: A powder neutron diffraction investigation

Author: Emmanuel Letavernier, Guy Matzen, Raphaël Weil, Emmanuel Véron, Michel Daudon, Dominique Bazin, Gilles André, HAL-UPMC, Gestionnaire, Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: medicine.medical_specialty, Chemistry(all), General Chemical Engineering, Urinary system, Neutron diffraction, 030232 urology & nephrology, Urology, Uric acid stones, Type 2 diabetes, 030204 cardiovascular system & hematology, Structural difference, Nephrolithiasis, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Diabetes mellitus, medicine, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, Gender, General Chemistry, medicine.disease, 3. Good health, Biochemistry, chemistry, Chemical Engineering(all), Uric acid, Kidney stones, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract: International audience; Background: Recent epidemiologic investigations have identified an association between type 2 diabetes and uric acid kidney stones. This association was more apparent in women than in men. However, male patients are more prone than women to form uric acid stones in upper and lower urinary tract. In addition, uric acid stone morphology may be different according to stone location. Finally, it was shown that uric acid stone prevalence is increasing with the patient’s age. Aim of the study: To compare uric acid crystal size as determined by powder neutron diffraction with clinical data and the gender of patients. Material and methods: Uric acid stones from 43 patients (24 males, 19 females) identified by Fourier transform infrared spectroscopy were investigated using Environmental Scanning Electron Microscopy and Powder neutron diffraction.Results: Uric acid anhydrous was the main crystalline form of the stones. The mean size of the crystals was 91.3 ± 28.5 nm. No significant differences were found regarding uric acid crystal size in the stones by comparison to the stone location or the patient’s age. However, particle sizes of uric acid kidney stones were significantly different between male and female patients (84.7 ± 5.3 vs. 140.2 ± 6.7 nm, p < 0.000003) in the absence of diabetes mellitus. Interestingly, when type 2 diabetes appeared, this structural difference between male and female vanished (76.1 ± 3.9 vs. 78.8 ± 4.2 nm, not significant). Thus, the complete set of structural data is in line with observations regarding epidemiological data. Some explanations based on supersaturation are discussed.
Published: 2016
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23. Analyse des cristaux d’hydroxyapatite dans l’os sous chondral par spectroscopie infrarouge à transformée de Fourier et diffraction neutronique sur poudres

Author: Michel Daudon, Christine Chappard, Gilles André, Dominique Bazin, Bioingénierie et Bioimagerie Ostéo-articulaires, Biomécanique et Biomatériaux Ostéo-Articulaires (B2OA (UMR_7052)), École nationale vétérinaire - Alfort (ENVA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), École nationale vétérinaire d'Alfort (ENVA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Diffraction, Materials science, Chemistry(all), Infrared, General Chemical Engineering, Neutron diffraction, Analytical chemistry, 02 engineering and technology, macromolecular substances, 010402 general chemistry, 01 natural sciences, Corps humain, symbols.namesake, Osteoarthritis, [CHIM]Chemical Sciences, Fourier transform infrared spectroscopy, Anisotropy, Spectroscopy, Bone, Diffraction neutronique sur poudres, Anisotropie, Human tissues, technology, industry, and agriculture, Hydroxy-apatite cristals, Spectroscopie infrarouge à transformée de Fourier, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Fourier transform, FTIR, symbols, Cristaux d'hydroxyapatite, Chemical Engineering(all), Ostéoarthrose, Crystallite, Powder neutron diffraction, 0210 nano-technology
Abstract: International audience; CR_Chimie_22_HAL_Chappard_8Juin2015 1 1 Analysis of hydroxyapatite crystallites in subchondral bone by Fourier transform infrared spectroscopy and powder neutron diffraction methods Analyse des cristaux d'hydroxyapatite dans l'os sous chondral par spectroscopie infra-rouge à transformée de Fourier et diffraction neutronique sur poudres ABSTRACT English Fourier Transform Infrared (FTIR) spectroscopy and powder neutron diffraction (PND) were performed in human subchondral bone covered (C+) or not covered by cartilage (C-) to study hydroxyapatite. With FTIR, the carbonation rate was 30% with identical spectra in C+ and C-. With PND, the width of the diffraction peak (hkl=002) highlighted the anisotropy of nanocrystals (with needle and/or platelet-like shape) along the c-axis with average length of 50 nm and thickness of 10 nm and with no difference between C+ and C- .; Des expérimentations par spectroscopie infrarouge à transformée de Fourier (FTIR) et par diffraction neutronique sur poudres (PND) ont été réalisées sur de l’os sous-chondral humain recouvert (C+) ou non recouvert par le cartilage (C) pour étudier l’hydroxyapatite (HAP).En FTIR, le taux de carbonatation est de 30% avec des spectres identiques pour C+ et C−. Avec la PND, la largeur du pic de diffraction (hkl = 002) a mis en évidence l'anisotropie des nanocristaux (en forme aiguille et/ou de plaquettes) le long de l'axe c, avec une longueur moyenne de 50 nm et une épaisseur de 10 nm, sans différence entre C+ et C−.
Published: 2016
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24. Vibrational spectroscopies to investigate concretions and ectopic calcifications for medical diagnosis

Author: Michel Daudon, Dominique Bazin, Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Tenon [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), HAL-UPMC, Gestionnaire, and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)
Subjects: Chemistry(all), Chemistry, Biopsy, General Chemical Engineering, 010401 analytical chemistry, Fourier transform infrared spectroscopy, 02 engineering and technology, General Chemistry, 021001 nanoscience & nanotechnology, Crystals, 01 natural sciences, Raman microspectroscopy, 0104 chemical sciences, Urinary calculi, Nuclear magnetic resonance, [CHIM] Chemical Sciences, Raman spectroscopy, Chemical Engineering(all), [CHIM]Chemical Sciences, Medical diagnosis, Infrared microspectroscopy, 0210 nano-technology, Infrared microscopy
Abstract: International audience; As asserted by numerous authors, Fourier Transform (FT)-Raman and FT-Infrared spectroscopies constitute two useful tools for bio-medical diagnostics. We can distinguish two different kinds of application, namely, tissue disorders analyzed using statistical methods, and detection of ectopic calcifications through precise analysis of the shape and the position of absorption bands. In this contribution, we present some new results regarding these research themes, as well as recent experimental developments, such as the ability to perform nanometer scale near-field infrared microscopy, which have already led to major scientific breakthroughs.
Published: 2016

25. Structural elucidation of silica present in kidney stones coming from Burkina Faso

Author: Michel Daudon, Christian Bonhomme, Stéphan Rouzière, Richard W. Ouedraogo, Raphael Weil, Dominique Bazin, Brahima Kirakoya, G. Coulibaly, Adama Lengani, Florence Babonneau, Arnaud Dessombz, Lise Picaut, HAL-UPMC, Gestionnaire, Centre de Recherche des Cordeliers (CRC), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Universitaire Yalgado Ouédraogo (CHUYO), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)
Subjects: Component, Chemistry(all), Kidney stones, General Chemical Engineering, 030232 urology & nephrology, Solid-state, Mineralogy, 010402 general chemistry, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, 01 natural sciences, 03 medical and health sciences, 0302 clinical medicine, Urolithiasis, Burkina Faso, medicine, Opaline silica, Lithiase urinaire, Mineral, Chemistry, Structure, General Chemistry, University hospital, medicine.disease, [SDV.MHEP.UN] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Silice opaline, Renal calcification, 0104 chemical sciences, Crystallography, Calcium Oxalate Crystals, Chemical Engineering(all), Amorphous silica, Calculs rénaux, Composant
Abstract: Hundred kidney stones obtained from the University Hospital of Ouagadougou (Burkina Faso) were finally characterized by a panel of complementary spectroscopic and diffraction tools. The most surprising result is the high occurrence of opaline silica as a component in these kidney stones. Opaline silica is a scarce mineral phase in renal calcification; however, we found that at least 48% of the stones had a detectable proportion of silica. SEM images demonstrate the presence of micrometric objects (of spheroidal shape) in close association with monohydrated calcium oxalate crystals. X-ray fluorescence, XRD and 29Si solid state MAS NMR demonstrate unambiguously the presence of amorphous silica, whose composition is comparable to that of natural opals. As NMR is a local spectroscopic probe, other nuclei can be probed. We demonstrate that traces of aluminium are present in the kidney stones by using 27Al solid state MAS NMR. These experiments may offer the first clues of pathological processes that are responsible for these stones., Cent calculs rénaux obtenus du CHU de Ouagadougou (Burkina Faso) ont été caractérisés par une série d'outils spectroscopiques et de diffraction complémentaires. Le résultat le plus marquant a été la très haute prévalence de la silice opaline comme composant de ces calculs. La silice opaline est un composant rare des calculs rénaux. Cependant, nous l'avons trouvée dans près de 48% des calculs, dans des proportions suffisantes pour être détectables par analyse infrarouge. Les images au MEB démontrent la présence d'objets micrométriques (de forme sphérique) en association intime avec des cristaux d'oxalate de calcium monohydraté. La fluorescence des rayons X, la diffraction des rayons X et la RMN du solide du 29Si démontrent sans ambiguïté la présence de silice amorphe, de manière comparable au cas des opales naturelles. Comme la RMN est une sonde spectroscopique locale, d'autres noyaux peuvent être détectés. Nous avons ainsi démontré que des traces d'aluminium sont présentes dans les calculs rénaux étudiés en utilisant la RMN du solide du noyau 27 Al. Ces expériences peuvent offrir les premiers éléments de réponse concernant le processus pathologique conduisant à la formation de ces calculs.
Published: 2016

26. Combination of X-ray synchrotron radiation techniques to gather information for clinicians

Author: Michel Daudon, Dominique Thiaudière, Cristian Mocuta, Solenn Reguer, Dominique Bazin, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Chemistry(all), Computer science, General Chemical Engineering, Synchrotron radiation, 02 engineering and technology, Radiation, Cellular level, Nephrolithiasis, 010402 general chemistry, 01 natural sciences, X ray synchrotron, Optics, [CHIM]Chemical Sciences, Information retrieval, business.industry, X-ray absorption spectroscopy, Electronic information, General Chemistry, X-ray scattering, 021001 nanoscience & nanotechnology, osteoporosis, X-Ray Fluorescence Spectroscopy, 0104 chemical sciences, X-ray fluorescence spectroscopy, arthritis, Chemical Engineering(all), 0210 nano-technology, business
Abstract: International audience; Among the different techniques specific to synchrotron radiation, the combination of X-ray absorption spectroscopy with X-ray scattering experiments is a powerful tool to characterize samples with a capability to gather structural and electronic information at the cellular level. In the present contribution, selected examples making use of such techniques, point out as well the information that one can have access to. Via the presentation of the physicochemical data, this paper focuses on displaying the information that has a significant clinical character.
Published: 2016

27. 87Sr,119Sn,127I Single and {1H/19F}-Double Resonance Solid-State NMR Experiments: Application to Inorganic Materials and Nanobuilding Blocks

Author: Christel Gervais, Lionel Campayo, Christian Bonhomme, Danielle Laurencin, François Ribot, Mark E. Smith, Adrian J. Wright, Guillaume Renaudin, Jean-Marie Nedelec, John V. Hanna, Dinu Iuga, Annabelle R. Baker, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), School of Chemistry University of Birmingham, University of Birmingham [Birmingham], Laboratoire d'études de Matériaux Céramiques pour le Conditionnement (LM2C), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), University of Warwick [Coventry], Lancaster University, Institut de Chimie de Clermont-Ferrand (ICCF), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), PICS QMAT, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), and Solid State NMR Group, University of Warwick
Subjects: GIPAW, wideline NMR, Iodide, Inorganic chemistry, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, WURST, 010402 general chemistry, 01 natural sciences, QD, Vanadate, QC, solid state NMR, chemistry.chemical_classification, Resonance, [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, Nuclear magnetic resonance spectroscopy, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Characterization (materials science), [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry, Solid-state nuclear magnetic resonance, 0210 nano-technology, Tin, Hybrid material
Abstract: International audience; 87Sr, 127I and 119Sn wideline NMR spectroscopy was successfully applied to inorganic and hybrid materials: (i) Sr derivatives of medicinal interest (Sr-malonate, Sr-pyrophosphates, mixed Ca,Sr-fluoroapatites); (ii) apatitic structures acting as host matrices for iodine; and (iii) Sn-derived oxo-clusters which can be used as inorganic nanobuilding blocks. The BRAIN (BRoadband Adiabatic INversion) CP (Cross Polarization) approach (by Schurko et al.) was applied to a non integer quadrupolar nucleus (87Sr, I=9/2). The sequence was used in combination with WURST (Wideband Uniform-Rate Smooth-Truncation) QCPMG (Quadrupolar Carr-Purcell Meiboom-Gill) for optimal sensitivity. We showed that 127I WURST QCPMG experiments were sufficiently sensitive to allow rapid characterization of the incorporation of iodide (I−) anions in lead vanadate/phosphate apatites, and that 127I acted as a sensitive probe for the description of local disorder. 1H/19F → 119Sn BRAIN CP was successfully applied to the detailed characterization of tin oxo-clusters, using 1H and 19F as spin baths. We demonstrated that BRAIN CP can be effectively used as a tool of spectral editing leading to the estimation of spatial proximities between 119Sn and 1H/19F nuclei.
Published: 2016

28. pH-Driven Self-Assembly of Acidic Microbial Glycolipids

Author: Mohamed Selmane, Patrick Le Griel, Susanne Zibek, Elisabeth Delbeke, Christian V. Stevens, Javier Pérez, Sophie Roelants, Wim Soetaert, Sylvain Prévost, Michael Guenther, Inge N. A. Van Bogaert, Niki Baccile, Publica, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), European Synchrotron Radiation Facility (ESRF), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), SWING beamline, Biophysics Group (SWING), Synchrotron SOLEIL, SynBioC, Universiteit Gent = Ghent University [Belgium] (UGENT), Fraunhofer Institute for Interfacial Engineering and Biotechnology (Fraunhofer IGB), Fraunhofer (Fraunhofer-Gesellschaft), InBio, Department of Biochemical and Microbial Technology, Bio Base Europe Pilot Plant, Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Universiteit Gent = Ghent University (UGENT)
Subjects: Cellobiose, Carboxylic acid, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, X-Ray Diffraction, Yeasts, Scattering, Small Angle, Ustilago, Electrochemistry, [CHIM]Chemical Sciences, Organic chemistry, General Materials Science, Micelles, Spectroscopy, chemistry.chemical_classification, Aqueous solution, Small-angle X-ray scattering, Vesicle, Bilayer, Fatty acid, Surfaces and Interfaces, Hydrogen-Ion Concentration, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, End-group, chemistry, Saturated fatty acid, Glycolipids, 0210 nano-technology, Acids, Hydrophobic and Hydrophilic Interactions
Abstract: International audience; Microbial glycolipids are a class of well-known compounds, but their self-assembly behavior is still not well understood. While the free carboxylic acid end group makes some of them interesting stimuli-responsive compounds, the sugar hydrophilic group and the nature of the fatty acid chain make the understanding of their self-assembly behavior in water not easy and highly unpredictable. Using cryo-transmission electron microscopy (cryo-TEM) and both pH-dependent in situ and ex situ small angle X-ray scattering (SAXS), we demonstrate that the aqueous self-assembly at room temperature (RT) of a family of β-d-glucose microbial glycolipids bearing a saturated and monounsaturated C18 fatty acid chain cannot be explained on the simple basis of the well-known packing parameter. Using the “pH-jump” process, we find that the molecules bearing a monosaturated fatty acid forms vesicles below pH 6.2, as expected, but the derivative with a saturated fatty acid forms infinite bilayer sheets below pH 7.8, instead of vesicles. We show that this behavior can be explained on the different bilayer membrane elasticity as a function of temperature. Membranes are either flexible or stiff for experiments performed at a temperature respectively above or below the typical melting point, TM, of the lipidic part of each compound. Finally, we also show that the disaccharide-containing acidic cellobioselipid forms a majority of chiral fibers, instead of the expected micelles.
Published: 2016

29. Modeling the attenuated total reflectance infrared (ATR-FTIR) spectrum of apatite

Author: Etienne Balan, Christian Brouder, Loïc Ségalen, Julie Aufort, Christel Gervais, Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS), Biominéralisations et environnements sédimentaires (BES), Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Labex Matisse, ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Infrared, Analytical chemistry, Physics::Optics, Infrared spectroscopy, Effective medium, Bruggeman model, 02 engineering and technology, 010502 geochemistry & geophysics, 01 natural sciences, Apatite, Geochemistry and Petrology, General Materials Science, Fourier transform infrared spectroscopy, 0105 earth and related environmental sciences, [PHYS]Physics [physics], Chemistry, Fluorapatite, [CHIM.MATE]Chemical Sciences/Material chemistry, Fresnel equations, 021001 nanoscience & nanotechnology, Wavelength, visual_art, Attenuated total reflection, visual_art.visual_art_medium, Attenuated total reflectance, 0210 nano-technology, ATR-FTIR, [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy
Abstract: International audience; Attenuated total reflectance (ATR) infrared spectra were measured on a synthetic and a natural fluorapatite sample. A modeling approach based on the computation of the Fresnel reflection coefficient between the ATR crystal and the powder sample was used to analyze the line shape of the spectra. The dielectric properties of the samples were related to those of pure fluorapatite using an effective medium approach, based on Maxwell–Garnett and Bruggeman models. The Bruggeman effective medium model leads to a very good agreement with the experimental data recorded on the synthetic fluorapatite sample. The poorer agreement observed on the natural sample suggests a more significant heterogeneity of the sample at a characteristic length scale larger than the mid-infrared characteristic wavelength, i.e., about 10 micrometers. The results demonstrate the prominent role of macroscopic electrostatic effects over fine details of the microscopic structure in determining the line shape of strong ATR bands.
Published: 2016

30. Rapid and reliable diagnosis of Wilson disease using X‐ray fluorescence

Author: Jean-Charles Duclos-Vallée, Françoise Schmitt, Catherine Guettier, Slavka Kascakova, Tuan Huy Nguyen, Andrea Somogyi, Cameron M. Kewish, Christophe Sandt, Didier Samuel, Joël Poupon, Emmanuel Jacquemin, Dominique Bazin, Bruno Francou, François Le Naour, Stéphan Rouzière, Rodolphe Sobesky, Anne Dubart-Kupperschmitt, Physiopathologie et traitement des maladies du foie, Université Paris-Sud - Paris 11 (UP11)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM), Hepatinov (DHU), Université Paris-Sud - Paris 11 (UP11)-Centre Hépato-Biliaire Paul Brousse, Ligne de lumière NANOSCOPIUM, Synchrotron SOLEIL, Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre de Recherche en Transplantation et Immunologie (U1064 Inserm - CRTI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Hémodynamique, Interaction Fibrose et Invasivité tumorales Hépatiques (HIFIH), Université d'Angers (UA), Centre hépato-biliaire (CHB), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de Référence pour la maladie de Wilson (CNR wilson), CNR Wilson, Service de Neurologie, Hôpital Lariboisière, Laboratoire de toxicologie biologique [AP-HP], Hôpital Lariboisière-Fernand-Widal [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Ligne de lumière SMIS, Service de Génétique Moléculaire Pharmacogénétique et Hormonologie, Hôpital Bicêtre, Service d’Hépatologie et de Transplantation Hépatique Pédiatriques, AP-HP Hôpital Bicêtre (Le Kremlin-Bicêtre), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Service d’Anatomo-Pathologie [AP-HP], Hôpital Paul Brousse, d'Eggis, Gilles, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0301 basic medicine, [SDV.MHEP.AHA] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Pathology, medicine.medical_specialty, Cirrhosis, diagnosis, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, chemistry.chemical_element, X-ray fluorescence, Zinc, X‐ray fluorescence spectroscopy, Pathology and Forensic Medicine, 03 medical and health sciences, 0302 clinical medicine, Cholestasis, [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], medicine, Wilson disease, [SDV.IB] Life Sciences [q-bio]/Bioengineering, Elemental composition, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.MHEP.HEG]Life Sciences [q-bio]/Human health and pathology/Hépatology and Gastroenterology, Original Articles, Long evans, medicine.disease, Copper, [SDV.MHEP.HEG] Life Sciences [q-bio]/Human health and pathology/Hépatology and Gastroenterology, Paraffin embedded, 3. Good health, X-ray fluorescence spectroscopy, 030104 developmental biology, chemistry, copper, Original Article, [SDV.IB]Life Sciences [q-bio]/Bioengineering, 030217 neurology & neurosurgery
Abstract: International audience; Wilson's disease (WD) is a rare autosomal recessive disease due to mutations of the gene encoding the copper-transporter ATP7B. The diagnosis is hampered by the variability of symptoms induced by copper accumulation , the inconstancy of the pathognomonic signs and the absence of a reliable diagnostic test. We investigated the diagnostic potential of X-ray fluorescence (XRF) that allows quantitative analysis of multiple elements. Studies were performed on animal models using Wistar rats (n = 10) and Long Evans Cinnamon (LEC) rats (n = 11), and on human samples including normal livers (n = 10), alcohol cirrhosis (n = 8), haemo-chromatosis (n = 10), cholestasis (n = 6) and WD (n = 22). XRF experiments were first performed using synchrotron radiation to address the elemental composition at the cellular level. High-resolution mapping of tissue sections allowed measurement of the intensity and the distribution of copper, iron and zinc while preserving the morphology. Investigations were further conducted using a laboratory X-ray source for irradiating whole pieces of tissue. The sensitivity of XRF was highlighted by the discrimination of LEC rats from wild type even under a regimen using copper deficient food. XRF on whole formalin-fixed paraffin embedded needle biopsies allowed profiling of the elements in a few minutes. The intensity of copper related to iron and zinc significantly discriminated WD from other genetic or chronic liver diseases with 97.6% specificity and 100% sensitivity. This study established a definite diagnosis of Wilson's disease based on XRF. This rapid and versatile method can be easily implemented in a clinical setting.
Published: 2016

31. Degradation and Crystallization of Cellulose in Hydrogen Chloride Vapor for High-Yield Isolation of Cellulose Nanocrystals

Author: Paavo A. Penttilä, Ritva Serimaa, Janne Ruokolainen, Jani-Markus Malho, Anne Meriluoto, Thomas Rosenau, Eero Kontturi, Niki Baccile, Janne Laine, Herbert Sixta, Antje Potthast, Aalto University, Imperial College London, UPM-Kymmene Corporation, University of Helsinki, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), University of Natural Resources and Life Sciences [Wien] (BOKU), Université médicale de Vienne, Autriche, Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Universität für Bodenkultur Wien = University of Natural Resources and Life [Vienne, Autriche] (BOKU)
Subjects: Materials science, Inorganic chemistry, ta221, 02 engineering and technology, Cellobiose, 010402 general chemistry, 01 natural sciences, Catalysis, Nanomaterials, law.invention, chemistry.chemical_compound, Crystallinity, Adsorption, law, Polysaccharides, [CHIM]Chemical Sciences, Biomass, Cellulose, Crystallization, Hydrogen chloride, Hydrolysis, General Chemistry, Interfacial reactions, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Acid hydrolysis, 0210 nano-technology
Abstract: International audience; Despite the structural, load-bearing role of cellulose in the plant kingdom, countless efforts have been devoted to degrading this recalcitrant polysaccharide, particularly in the context of biofuels and renewable nanomaterials. Herein, we show how the exposure of plant-based fibers to HCl vapor results in rapid degradation with simultaneous crystallization. Because of the unchanged sample texture and the lack of mass transfer out of the substrate in the gas/solid system, the changes in the crystallinity could be reliably monitored. Furthermore, we describe the preparation of cellulose nanocrystals in high yields and with minimal water consumption. The study serves as a starting point for the solid-state tuning of the supramolecular properties of morphologically heterogeneous biological materials.
Published: 2016

32. Hydration in silica based mesoporous materials: a DFT model

Author: Ivan Petit, Jarosław Handzlik, Frederik Tielens, Maciej Gierada, Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Labex Matisse, ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Work (thermodynamics), Materials science, Computation, Ab initio, General Physics and Astronomy, [CHIM.MATE]Chemical Sciences/Material chemistry, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Adsorption, Computational chemistry, Chemical physics, Molecule, Physical and Theoretical Chemistry, 0210 nano-technology, Mesoporous material
Abstract: International audience; The MCM-41 material is very commonly used as a support for catalysts. However, theoretical investigations are significantly limited due to the lack of appropriate models that well and accurately describe the real material and enable effective computation at the same time. In this work, our aim is to obtain calculable models at the DFT level of MCM-41 which are as close as possible to the real material. In particular the hydration degree has been investigated, and we present and characterize here for the first time a model for the MCM-41 unit cell filled with explicit solvent water molecules. This is particularly important, because the models developed here are aimed to be further applied in theoretical ab initio/DFT studies of adsorption or as a support for modelling active sites in catalysts.
Published: 2016

33. Improving solid-state NMR sensitivity using instrumentation, fast acquisition and post-processing

Author: Laurent, Guillaume, Bonhomme, Christian, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [CHIM.ANAL]Chemical Sciences/Analytical chemistry, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2018

34. Delayed ileal perforation from sodium polystyrene sulfonate

Author: Vincent Frochot, Dominique Bazin, Valérie Caudwell, Michel Daudon, Benoit Terris, A.-L. Faucon, Centre Hospitalier Sud Francilien, CH Evry-Corbeil, Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Institut Cochin (IC UM3 (UMR 8104 / U1016)), Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), HAL-UPMC, Gestionnaire, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), and Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Male, 0301 basic medicine, Ileal Perforation, Spectrophotometry, Infrared, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, law.invention, 03 medical and health sciences, law, Spectrophotometry, medicine, Humans, Crystallization, ComputingMilieux_MISCELLANEOUS, Aged, Chelating Agents, Microscopy, medicine.diagnostic_test, Ileal Diseases, Chemistry, [SDV.SP]Life Sciences [q-bio]/Pharmaceutical sciences, [SDV.MHEP.UN] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, [SDV.SP] Life Sciences [q-bio]/Pharmaceutical sciences, 030104 developmental biology, Intestinal Perforation, Nephrology, Microscopy, Electron, Scanning, Polystyrenes, Sodium Polystyrene Sulfonate, Nuclear chemistry
Abstract: International audience
Published: 2018

35. The interplay between calcite, amorphous calcium carbonate and intra-crystalline organics in sea urchin skeletal elements

Author: Mathieu Bennet, Emil Zolotoyabko, Marie Albéric, Luca Bertinetti, Nadine Nassif, Widad Ajili, Peter Fratzl, Yael Politi, El'ad N. Caspi, Thierry Azaïs, Alex Berner, Max Planck Institute of Colloids and Interfaces, Max-Planck-Gesellschaft, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Matériaux Hybrides et Nanomatériaux (MHN), Technion - Israel Institute of Technology [Haifa], and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: 02 engineering and technology, Test (biology), 010402 general chemistry, 01 natural sciences, Paracentrotus lividus, law.invention, chemistry.chemical_compound, law, biology.animal, General Materials Science, Crystallization, Sea urchin, Calcite, biology, Chemistry, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, biology.organism_classification, Amorphous calcium carbonate, 0104 chemical sciences, Chemical engineering, Anhydrous, 0210 nano-technology, Biomineralization
Abstract: International audience; Biomineralization processes in living organisms result in the formation of skeletal elements with complex ultrastructures. Although the formation pathways in sea urchin larvae are known, the interrelation between calcite, amorphous calcium carbonate (ACC), and intra-crystalline organics in adult sea urchin biominerals is less clear. Here, we study this interplay in the spines and test 2 plates of the Paracentrotus lividus sea urchins whose skeletal elements have optimized function-properties relationships. Thermogravimetric analysis coupled with differential scanning calorimetry or mass spectrometry measurements, nuclear magnetic resonance technique and high-resolution powder X-ray diffraction show that pristine spines and test plates are composed of Mg-rich calcite and comprise about 10 wt. % of anhydrous ACC, 1.2 to 1.6 wt. % of organics, and less than 0.2 wt. % of water. Anhydrous ACC originates from incomplete crystallization of a precursor ACC phase during biomineralization and is associated with intra-crystalline organics at the molecular level. Molecular interactions at organic/inorganic interfaces cause significant calcite lattice distortions of the tensile type. The latter are amplified during ACC crystallization and finally disappear after heat-assisted destruction of organic molecules. Converting the measured lattice distortions (strains) into internal stress components, we follow stress evolution upon annealing and find that complete crystallization of ACC leads to the isotropy of residual stresses in all investigated skeletal parts. These results allow us to speculate that organic macromolecules are preferentially attached to different crystallographic planes in the pristine test and spine samples.
Published: 2018

36. pH- and time-resolved in-situ SAXS study of self-assembled twisted ribbons formed by elaidic acid sophorolipids

Author: Bhagavatula L. V. Prasad, Sylvain Prévost, Prabhu Dhasaiyan, Niki Baccile, Physical and Materials Chemistry Division [Pune], Council of Scientific and Industrial Research [India] (CSIR), European Synchrotron Radiation Facility (ESRF), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Double bond, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Hydrophobic effect, chemistry.chemical_compound, Electrochemistry, [CHIM]Chemical Sciences, General Materials Science, Carboxylate, Spectroscopy, Alkyl, chemistry.chemical_classification, integumentary system, Small-angle X-ray scattering, Sophorolipid, Surfaces and Interfaces, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Elaidic acid, 0104 chemical sciences, Crystallography, chemistry, lipids (amino acids, peptides, and proteins), Stearic acid, 0210 nano-technology
Abstract: International audience; Conditions that favor the helical structure formation in structurally similar sophorolipids (SLs), that is, elaidic acid SLs (having trans double bond between the C9 - C10 positions of the alkyl chain) and stearic acid SLs (no double bond) are presented here. The helical self – assembled structures formed by elaidic acid SLs were independent of pH and also were mediated by micellar intermediate. On the other hand, the stearic acid SLs formed helical structures under low pH condition only. Astonishingly, the formation routes were found to be different, albeit the molecular geometry of both the SLs is similar. Though a conclusive mechanistic understanding must await further work, our studies strongly point out that the non - covalent weak interactions in elaidic acid SL are able to overcome the electrostatic repulsions of the sophorolipid carboxylate groups at basic pH and facilitating the formation of helical structures. On the other hand, the hydrophobic interactions in stearic acid SLs endows the helical structures extra stability making them less vulnerable to dissolution upon heating.
Published: 2018

37. Theoretical isotopic fractionation between structural boron in carbonates and aqueous boric acid and borate ion

Author: Jacques Schott, Fabio Pietrucci, Etienne Balan, James R. Rustad, Giuseppe D. Saldi, Christel Gervais, Jérôme Gaillardet, Valérie Montouillout, Marc Blanchard, Vasileios Mavromatis, Johanna Noireaux, Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Géosciences Environnement Toulouse (GET), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (LCMCP-SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Office of Basic Energy Sciences, U.S. Department of Energy [Washington] (DOE), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), HPC resources from GENCI-IDRIS (Grant 2017-A0010401519), ANR-13-BS06-0013,CARBORIC,Les isotopes du bore dans les carbonates comme proxy du paléo-pH océanique: les fondamentaux revisités(2013), ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Institut national des sciences de l'Univers (INSU - CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales [Toulouse] (CNES), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), U.S. Department of Energy (DOE), Centre de recherches sur les matériaux à haute température (CRMHT), Centre National de la Recherche Scientifique (CNRS), Collège de France (CdF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Mécanismes et Transfert en Géologie (LMTG), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), and Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Boron pH-proxy, 010504 meteorology & atmospheric sciences, Inorganic chemistry, chemistry.chemical_element, Fractionation, Isotopes of boron, 010502 geochemistry & geophysics, 01 natural sciences, Boric acid, chemistry.chemical_compound, Geochemistry and Petrology, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, 550 Earth sciences & geology, Boron, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Aqueous solution, Calcium carbonates, Equilibrium fractionation, Theoretical isotopic fractionation factors, Ab initio modeling, chemistry, 13. Climate action, Carbonate, Chemical equilibrium, [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy
Abstract: International audience; The 11B/10B ratio in calcite and aragonite is an important proxy of oceanic water pH. However, the physico-chemical mechanisms underpinning this approach are still poorly known. In the present study, we theoretically determine the equilibrium isotopic fractionation properties of structural boron species in calcium carbonates, BO33-, BO2(OH)2- and B(OH)4- anions substituted for carbonate groups, as well as those of B(OH)4- and B(OH)3 species in vacuum. Significant variability of equilibrium isotopic fractionation properties is observed among these structural species which is related to their contrasted coordination state, B-O bond lengths and atomic-scale environment. The isotopic composition of structural boron does not only depend on its coordination number but also on its medium range environment, i.e. farther than its first coordination shell. The isotopic fractionation between aqueous species and their counterparts in vacuum are assessed using previous investigations based on similar quantum-mechanical modeling approaches. At 300K, the equilibrium isotope composition of structural trigonal species is 7 to 15 ‰ lighter than that of aqueous boric acid molecules, whereas substituted tetrahedral borate ions are heavier than their aqueous counterparts by 10 to 13 ‰. Although significant uncertainties are known to affect the theoretical prediction of fractionation factors between solids and solutions, the usually assumed lack of isotopic fractionation during borate incorporation in carbonates is challenged by these theoretical results. The present theoretical equilibrium fractionation factors between structural boron and aqueous species differ from those inferred from experiments which may indicate that isotopic equilibrium, unlike chemical equilibrium, was not reached in most experiments. Further research into the isotopic fractionation processes at the interface between calcium carbonates and aqueous solution as well as long duration experiments aimed at investigating the kinetics of equilibration of boron environment and isotopic composition are therefore required to refine our understanding of boron coprecipitation in carbonates and thus the theory behind the use of boron isotopes as an ocean pH proxy.
Published: 2018

38. High frequency and wide range of human kidney papillary crystalline plugs

Author: Marine Le Dudal, Marine Livrozet, Jean Philippe Haymann, Léa Huguet, Emmanuel Letavernier, Joëlle Perez, Isabelle Brocheriou, Michel Daudon, Dominique Bazin, Vincent Frochot, Des Maladies Rénales Rares aux Maladies Fréquentes, Remodelage et Réparation, Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Service de Pathologie [CHU Tenon], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Service d'Explorations fonctionnelles multidisciplinaires [CHU Tenon], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), HAL-UPMC, Gestionnaire, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Sorbonne Université (SU), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)
Subjects: Calcium Phosphates, 0301 basic medicine, Urology, 030232 urology & nephrology, Calcium oxalate, chemistry.chemical_element, Calcium, engineering.material, [SDV.MHEP.UN]Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, Kidney Calculi, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Spectroscopy, Fourier Transform Infrared, medicine, Loop of Henle, Humans, Amorphous calcium phosphate, Kidney Tubules, Collecting, Octacalcium phosphate, Aged, Magnesium phosphate, Chemistry, urogenital system, Anatomy, Middle Aged, medicine.disease, [SDV.MHEP.UN] Life Sciences [q-bio]/Human health and pathology/Urology and Nephrology, 030104 developmental biology, medicine.anatomical_structure, Microscopy, Electron, Scanning, Whitlockite, engineering, Kidney stones
Abstract: International audience; Most of kidney stones are supposed to originate from Randall's plaque at the tip of the papilla or from papillary tubular plugs. Nevertheless, the frequency and the composition of crystalline plugs remain only partly described. The objective was to assess the frequency, the composition and the topography of papillary plugs in human kidneys. A total of 76 papillae from 25 kidneys removed for cancer and without stones were analysed by immunohistochemistry combined with Yasue staining, field emission-scanning electron microscopy and Fourier transformed infrared micro-spectroscopy. Papillary tubular plugs have been observed by Yasue staining in 23/25 patients (92%) and 52/76 papillae (68%). Most of these plugs were made of calcium phosphate, mainly carbonated apatite and amorphous calcium phosphate, and rarely octacalcium phosphate pen-tahydrate. Calcium and magnesium phosphate (whitlockite) have also been observed. Based upon immunostaining coupled to Yasue coloration, most of calcium phosphate plugs were located in the deepest part of the loop of Henle. Calcium oxalate monohydrate and dihydrate tubular plugs were less frequent and stood in collecting ducts. At last, we observed calcium phosphate plugs deforming and sometimes breaking adjacent collecting ducts. Papillary tubular plugging, which may be considered as a potential first step toward kidney stone formation, is a very frequent setting, even in kidneys of non-stone formers. The variety in their composition and the distal precipitation of calcium oxalate suggest that plugs may occur in various conditions of urine supersaturation. Plugs were sometimes associated with collecting duct deformation.
Published: 2018

39. 11B-MAS NMR approach to the boron adsorption mechanism on a glucose-functionalised mesoporous silica matrix

Author: Félix Sancenón, Pedro Amorós, Ramón Martínez-Máñez, M. Dolores Marcos, Cristina Sanfeliu, Juan Soto, Thierry Azaïs, Universitat Politècnica de València (UPV), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Boron adsorption modelling, Solid-state, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Isothermal process, Matrix (chemical analysis), Adsorption, QUIMICA ORGANICA, General Materials Science, Boron, Extraction (chemistry), QUIMICA INORGANICA, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, B-11 MAS NMR, Mesoporous silica, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Gluconamide-functionalised porous materials, 0104 chemical sciences, Sugar derivatives, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Chemical engineering, chemistry, Mechanics of Materials, 0210 nano-technology
Abstract: [EN] Boron chemistry has raised much interest because, despite the difference between necessities and toxicity being very narrow, it is still widely used in industrial processes. In a previous work we reported an adsorbent for boron extraction from water by the functionalisation of a UVM-7 mesoporous silica matrix with gluconamide moieties. The ability of this material to adsorb boron is based on its well-known affinity for coordinating the cis-diols present in attached saccharide. Although much research on the formation of boron esters with sugars and sugar derivatives in solution has been done, very few reports have dealt with the adsorption mechanism of boron onto functionalised materials in the solid state. Hence an in-depth study of the adsorption process was conducted in this paper. For this purpose, several solids with increasing boron contents were prepared from the gluconamide-functionalised UVM-7 material and an isothermal boron adsorption curve was obtained. The B-11 and C-13 MAS NMR techniques were used to characterise the obtained solids, and the simulation of the boron NMR and isothermal adsorption combined data was accomplished to enlighten the boron adsorption process. A model with three different coordination environments, two possible adsorption sites and the presence of oligomeric boron species allowed us to reproduce not only the isothermal boron adsorption curve, but also the evolution of the integrated areas for the signals in the B-11 MAS NMR spectra obtained for the different boron-containing gluconamide-functionalised UVM-7 materials., Financial support from the Spanish Government (Project MAT2009-14564-C04-01 and MAT2012-38429-C04-01) and the Generalitat Valenciana (Project PROMETEO/2009/016) is gratefully acknowledged. C.S. thanks the MICINN for a predoctoral fellowship.
Published: 2018

40. Synthesis and Biological Evaluation of Bolaamphiphilic Sophorolipids

Author: Inge N. A. Van Bogaert, Tom Coenye, Olivier Lozach, Tristan Montier, Wim Soetaert, Petra Rigole, Elisabeth Delbeke, Mathieu Berchel, Sophie Roelants, Jonas Everaert, Kevin Van Geem, Martha Brennich, Paul-Alain Jaffrès, Christian V. Stevens, Niki Baccile, Tony Le Gall, SynBioC Research Group [Ghent], Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering [Gent], Universiteit Gent = Ghent University [Belgium] (UGENT)-Universiteit Gent = Ghent University [Belgium] (UGENT), Department of Materials, Textiles and Chemical Engineering (LCT), Universiteit Gent = Ghent University [Belgium] (UGENT), Department of Biotechnology (InBio), Chimie, Electrochimie Moléculaires et Chimie Analytique (CEMCA), Université de Brest (UBO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO), Génétique, génomique fonctionnelle et biotechnologies (UMR 1078) (GGB), Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO)-EFS-Institut National de la Santé et de la Recherche Médicale (INSERM), IBISA ' SynNanoVect ' platform, Université de Brest (UBO)-IFR148 ScInBioS, Service de génétique moléculaire et d'histocompatibilité, Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), Département Universitaire de Médecine Générale (DUMG), Laboratory of Pharmaceutical Microbiology, Institut Laue-Langevin (ILL), ILL, Synchrotron Crystallography Group, European Molecular Biology Laboratory [Grenoble] (EMBL), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Bio Base Europe Pilot Plant, Centre for Synthetic Biology, EFS-Université de Brest (UBO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Brestois Santé Agro Matière (IBSAM), Ghent University [Belgium] ( UGENT ) -Ghent University [Belgium] ( UGENT ), Department of Materials, Textiles and Chemical Engineering ( LCT ), Ghent University [Belgium] ( UGENT ), Department of Biotechnology ( InBio ), Chimie, Electrochimie Moléculaires et Chimie Analytique ( CEMCA ), Université de Brest ( UBO ) -Institut de Chimie du CNRS ( INC ) -Centre National de la Recherche Scientifique ( CNRS ) -IFR148 ScInBioS, Génétique, génomique fonctionnelle et biotechnologies (UMR 1078), EFS-Université de Brest ( UBO ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Université de Brest ( UBO ) -IFR148 ScInBioS, Centre Hospitalier Régional Universitaire de Brest ( CHRU Brest ), Département Universitaire de Médecine Générale ( DUMG ), Université de Brest ( UBO ), Institut Laue-Langevin ( ILL ), European Molecular Biology Laboratory [Grenoble] ( EMBL ), Laboratoire de Chimie de la Matière Condensée de Paris ( LCMCP ), Centre National de la Recherche Scientifique ( CNRS ) -Collège de France ( CdF ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ), RENARD, NICOLAS, Universiteit Gent = Ghent University (UGENT)-Universiteit Gent = Ghent University (UGENT), and Universiteit Gent = Ghent University (UGENT)
Subjects: General Chemical Engineering, Bolaamphiphile, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Aldehyde, Reductive amination, [ CHIM ] Chemical Sciences, Minimum inhibitory concentration, [ CHIM.ORGA ] Chemical Sciences/Organic chemistry, Amphiphile, [CHIM] Chemical Sciences, Environmental Chemistry, [CHIM]Chemical Sciences, bolaamphiphiles, transfection efficiency, chemistry.chemical_classification, Minimum bactericidal concentration, antimicrobial activity, Renewable Energy, Sustainability and the Environment, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Sophorolipid, quaternary ammonium salt, Sophorolipids, General Chemistry, self-assembly, 021001 nanoscience & nanotechnology, Antimicrobial, [CHIM.ORGA] Chemical Sciences/Organic chemistry, Combinatorial chemistry, 0104 chemical sciences, chemistry, 0210 nano-technology, chemical modification
Abstract: New synthetic pathways are proposed for the synthesis of a new set of bolaamphiphilic derivatives starting from microbiologically produced sophorolipids. A total set of 43 new derivatives was synthesized Via reductive amination of a previously synthesized sophorolipid aldehyde with diamines and primary amines. The new derivatives were evaluated for their antimicrobial activity against Gram-negative and Gram-positive bacteria. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values were determined for the active compounds. Transfection efficiencies were also evaluated for some of the deprotected derivatives via the assessment of their capacity to transfect three different eukaryotic cell lines in vitro. Finally, the self-assembly properties were evaluated for the deprotected derivatives. Antimicrobial activities were mostly observed for the peracetylated mono- or dicationic bolaamphiphiles and only the deprotected monocationic bolaamphiphile with an octadecyl chain on the nitrogen atom was eligible for the evaluation of its transfection properties. Evaluation of the self-assembly properties indicated that the presence of an octadecyl chain was necessary for micelle formation. Both micelle formation and the net charge of the compounds seem to have an influence on the antimicrobial activity and transfection efficiency. These results are promising for use of bolaamphiphilic sophorolipids in medical and self-assembly applications., Dans ce travail de nouveaux composés amphiphiles cationiques sont préparés à partir de sophoro lipides. Ces composés sont formulés en solution liposomales et évaluées pour leurs propriétés bactéricides et pour la transfection. Des analyses physico-chimiques montrent des assemblages sous forme de micelles
Published: 2018
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41. Complex coacervation of natural sophorolipid bolaamphiphile micelles with cationic polyelectrolytes

Author: Ghazi Ben Messaoud, Lyndsay Promeneur, Sophie Roelants, Niki Baccile, Martha Brennich, Patrick Le Griel, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Bio Base Europe Pilot Plant, Centre of Expertise for Industrial Biotechnology and Biocatalysis, and Universiteit Gent = Ghent University [Belgium] (UGENT)
Subjects: GLYCOLIPID BIOSURFACTANTS, Sophorolipid, Bolaamphiphile, DODECYL-SULFATE, 02 engineering and technology, Bolaform, 010402 general chemistry, 01 natural sciences, Micelle, AQUEOUS-SOLUTION, Cryo-TEM, Dynamic light scattering, MIXED MICELLES, Environmental Chemistry, BOVINE SERUM-ALBUMIN, Coacervate, Small-angle X-ray scattering, Chemistry, Cationic polymerization, GEMINI SURFACTANT, Polyelectrolyte, 021001 nanoscience & nanotechnology, Pollution, BETA-LACTOGLOBULIN, LIGHT-SCATTERING, 0104 chemical sciences, MOLECULAR-WEIGHT, [CHIM.POLY]Chemical Sciences/Polymers, Chemical engineering, Physics and Astronomy, PHYSICOCHEMICAL PROPERTIES, Complex coacervation, 0210 nano-technology
Abstract: International audience; Complex coacervation of polyelectrolytes with surfactant micelles is a promising system for a wide range of applications. However, the development of “green coacervates” from bio-based surfactants and biopolymers has not yet been explored. Herein, complex coacervation of micelles from a bolaform sophorolipid biosurfactant with oppositely charged cationic polyelectrolytes (i.e., chitosan oligosaccharide lactate, poly (L-lysine) and poly(allylamine)) was investigated. Turbidity titration, light and scanning electron microscopy (SEM), dynamic light scattering (DLS), cryogenic transmission electron microscopy (cryo-TEM) and Small Angle X-ray Scattering (SAXS) were used to monitor the evolution of complex structures as a function of pH and polyelectrolyte concentration. Phase boundaries of the biosurfactant–polyelectrolyte systems were obtained and these revealed the feasibility of coacervation in water over a broad range of pH, from 5 to 9. The state of complexation was found to depend primarily on pH and concentration and the nature of the polyelectrolyte. Light microscopy and SEM demonstrated the associative macrophase separation, and cryo-TEM highlighted the influence of the desolvation level on the coacervate arrangement where two main structures were formed as a function of the coacervation stage, namely spherical particles and aggregates. The SAXS data demonstrated that the sophorolipid micelles maintained their structure integrity following their binding to the cationic polyelectrolyte.
Published: 2018

42. Implication of Water Molecules at the Silica – Ibuprofen Interface in Silica-Based Drug Delivery Systems Obtained through Incipient Wetness Impregnation

Author: Flavien Guenneau, Jean-Marie Devoisselle, Corine Tourné-Péteilh, Guillaume Laurent, Andrei Nossov, Kuldeep Panesar, Florence Babonneau, Cristina Sanfeliu Cano, Thierry Azaïs, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Ibuprofen, 02 engineering and technology, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, 010402 general chemistry, 01 natural sciences, Fast release, chemistry.chemical_compound, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, medicine, Organic chemistry, Molecule, Physical and Theoretical Chemistry, Incipient wetness impregnation, Benzoic acid, solid state NMR, organic chemicals, Chemical exchange, Mesoporous silica, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Drug delivery systems, General Energy, [SDV.SP.PG]Life Sciences [q-bio]/Pharmaceutical sciences/Galenic pharmacology, chemistry, Chemical engineering, Drug delivery, Encapsulation, 0210 nano-technology, medicine.drug
Abstract: International audience; The dynamical behavior of ibuprofen or benzoic acid (model molecule of ibuprofen) encapsulated in mesoporous silica is very specific as a very high mobility is evidenced at ambient temperature due to the existence of confinement effect. In this contribution, we demonstrate through variable temperature 1H MAS NMR experiments that this specific dynamical behavior is also related to a fast chemical exchange that takes place between protons of the COOH group of the organic molecule and protons from water molecules at the surface of the silica for materials obtained through incipient wetness impregnation. This phenomenon implies a weak interaction between the guest molecule and the silica surface that is related to the fast release profile of encapsulated ibuprofen observed in vitro.
Published: 2017

43. Impact of Polyethylenimine Conjugation Mode on the Cell Transfection Efficiency of Silica Nanovectors

Author: Thibaud Coradin, Guillaume Laurent, Xiaolin Wang, Sylvie Masse, Christophe Hélary, Matériaux et Biologie (MATBIO), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), China Scholarship Council, and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Silicon dioxide, Genetic Vectors, Nanotechnology, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, macromolecular substances, 02 engineering and technology, Gene delivery, Transfection, 010402 general chemistry, 01 natural sciences, Mice, chemistry.chemical_compound, Electrochemistry, Animals, Humans, Polyethyleneimine, General Materials Science, Cytotoxicity, Cells, Cultured, Spectroscopy, Electrophoresis, Agar Gel, Polyethylenimine, technology, industry, and agriculture, 3T3 Cells, [CHIM.MATE]Chemical Sciences/Material chemistry, Surfaces and Interfaces, Silicon Dioxide, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Sulfonate, Microscopy, Fluorescence, chemistry, Biophysics, Particle, Surface modification, 0210 nano-technology
Abstract: International audience; The conjugation of polyethylenimine (PEI) to silica nanoparticles has emerged as a useful strategy in gene delivery. Here we investigate the influence of the PEI conjugation mode on the transfection ability of plain silica nanoparticles. Surface functionalization with sulfonate- and chloride-bearing silanes modulates the amount and conformation of PEI and therefore the particles' affinity for the plasmid, without impacting on cytotoxicity. transfection efficiency in both immortalized and primary cells is more directly correlated to the nature and strength of the particle PEI interactions. It suggests that PEI detachment from the particle surface at the stage of endosomal escape is a key event in the plasmid delivery process. These data should provide fruitful guidelines for the fine tuning of colloidal surfaces intended for intracellular delivery of bioactive molecules.
Published: 2015

44. Oil shale powders and their interactions with ciprofloxacin, ofloxacin, and oxytetracycline antibiotics

Author: Abdelaziz Laghzizil, Sanaa Saoiabi, A. Rami, Guillaume Laurent, Miloud El Karbane, Asmae Gouza, Sylvie Masse, A. Saoiabi, Thibaud Coradin, Laboratoire de Chimie physique Générale, Université Mohammed V de Rabat [Agdal] (UM5), Laboratoire National de Contrôle des Médicaments, Rabat, Morocco, Matériaux et Biologie (MATBIO), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), APATENV project of the PICS program., Université Mohammed V de Rabat [Agdal], and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Ofloxacin, Mineral sorbents, Health, Toxicology and Mutagenesis, Iron oxide, Oxytetracycline, 02 engineering and technology, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, 010501 environmental sciences, 01 natural sciences, Hydrophobic effect, chemistry.chemical_compound, Ciprofloxacin, Antibiotics, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Specific surface area, medicine, Soil Pollutants, Environmental Chemistry, Organic matter, Quartz, Environmental Restoration and Remediation, 0105 earth and related environmental sciences, Solid state NMR, chemistry.chemical_classification, Oil shale, Minerals, Chromatography, Chemistry, Sorption, General Medicine, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Pollution, Anti-Bacterial Agents, Morocco, Retention, 13. Climate action, Environmental chemistry, Adsorption, Powders, 0210 nano-technology, Hydrophobic and Hydrophilic Interactions, medicine.drug
Abstract: International audience; The interaction of oil shale, as a widespread sedimentary rock, with common antibiotics ofloxacine, oxytetracycline, and ciprofloxacine was studied. The selected Moroccan deposit and its thermally treated forms were fully characterized from a chemical and structural point of view, indicating the prevalence of quartz as a mineral component together with aluminum- and iron-rich phase that are converted into Al-doped iron oxide phases upon heating. The presence of 4 wt% organics was also detected, which was removed at 550 °C without significant loss of specific surface area. The pseudo-second-order kinetic model and Langmuir equation were found the most adequate to reproduce the kinetics and isothermal sorption experiments. These analyses enlighten the contribution of the organic matter on antibiotic retention as well as the key role of hydrophobic interactions on the molecule-mineral surface interactions. Our results emphasize the possible contribution of raw oil shale in the accumulation of antibiotics in soils and suggest that thermally treated oil shell powders can constitute cheap mineral sorbents for environmental cleaning.
Published: 2017

45. Hydroxyapatites: Key Structural Questions and Answers from Dynamic Nuclear Polarization

Author: Christian Bonhomme, César Leroy, Cristina Coelho-Diogo, Satoshi Hayakawa, Akiyoshi Osaka, Laure Bonhomme-Coury, Florence Babonneau, Fabien Aussenac, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Bruker Biospin SA, Wissembourg, Okayama University of Science, Institut des matériaux de Paris-Centre (IMPC), Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Questions and answers, Chemistry, Resolution (electron density), Nanoparticle, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Polarization (waves), 01 natural sciences, 0104 chemical sciences, Analytical Chemistry, Crystallography, Orders of magnitude (time), Chemical physics, Spin diffusion, [CHIM]Chemical Sciences, Hydroxyapatites, 0210 nano-technology, Line (formation)
Abstract: International audience; We demonstrate that NMR/DNP (Dynamic Nuclear Polarization) allows an unprecedented description of carbonate substituted hydroxyapatite (CHAp). Key structural questions related to order/disorder and clustering of carbonates are tackled by using distance sensitive DNP experiments using 13 C-13 C recoupling. Such experiments are easily implemented due to unprecedented DNP gain (orders of magnitude). DNP is efficiently mediated by quasi one-dimensional spin diffusion through the hy-droxyl columns present in the CHAp structure (thought as "highways" for spin diffusion). For spherical nanoparti-cles and ∅ < 100 nm, it is numerically shown that spin diffusion allows their study as a whole. Most importantly, we demonstrate also that the DNP study at 100 K leads to data which are comparable to data obtained at room temperature (in terms of spin dynamics and lineshape resolution). Finally, all 2D DNP experiments can be interpreted in terms of domains exhibiting well identified types of substitution: local order and carbonate clustering are clearly favored.
Published: 2017

46. Rationalizing the formation of binary mixed thiol self-assembled monolayers

Author: Frederik Tielens, Douga Nassoko, Mahamadou Seydou, David Portehault, Clément Sanchez, Corinne Chanéac, Claire Goldmann, Chemistry, General Chemistry, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Bamako (ENSup Bamako), Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS (UMR_7086)), Université Paris Diderot - Paris 7 (UPD7)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Matériaux Hybrides et Nanomatériaux (MHN), Chaire Chimie des matériaux hybrides, Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)
Subjects: Polymers and Plastics, Nanoparticle, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, DFT, Catalysis, Nanomaterials, Biomaterials, Adsorption, Colloid and Surface Chemistry, Monolayer, Materials Chemistry, thiols, Chemistry, Intermolecular force, Self-assembled monolayer, Interaction energy, [CHIM.MATE]Chemical Sciences/Material chemistry, self assembly, 021001 nanoscience & nanotechnology, Nano domains, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Chemical physics, gold nanoparticles, Self-assembly, 0210 nano-technology
Abstract: International audience; Periodic DFT-D calculations are used to decipher the role of intermolecular forces on the stability of mixed linear thiol self-assembled monolayers (SAMs) on Au(111) and compared with experiment. The interaction energy is rationalized by quantifying its different contributions. The inter-chain interaction energy is shown to be in direct relation with the surface reconstruction and the formation of adatoms. The stability of the mixed SAM systems is predicted by calculations and validated with experiments. In order to describe predictively the segregation of binary thiol mixtures adsorption on Au surfaces a segregation descriptor is defined. This procedure is a promising step forward in the prediction of segregated SAMs leading to future functional nanomaterials, including Janus or patchy nanoparticles for optics, formulation and self-assembled patterns.
Published: 2017

47. NMR safeguarding plan in case of major flooding of the Seine river

Author: Laurent, Guillaume, Babonneau, Florence, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Major flooding, Safeguarding plan, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Nuclear Magnetic Resonance, [SDE.ES]Environmental Sciences/Environmental and Society
Abstract: International audience; Jussieu site is located in Paris on the banks of the Seine river. 14 NMR spectrometers are ranging from 300 MHz to 700 MHz. 9 NMR are on the ground floor, 5 NMR are on higher floors. Their total cost is 7 M€. A quench will cost 40 k€ per spectrometer. Flooding of electronics is estimated to 200 k€ per spectrometer.Major flooding of the Seine river is a highly probable risk. The NMR platform could be strongly affected. The electronic cabinets need to be evacuated to higher floors. A good coordination is needed between NMR technical staff, campus cryogenics staff and campus technical staff. NMR staff comings and goings will get considerably more complicated.; Le site de Jussieu de Sorbonne Universités – Université Pierre et Marie Curie se situe en bordure de la Seine et risque d’être fortement impacté en cas de crue majeure du fleuve. Quatorze spectromètres de Résonance Magnétique Nucléaire (RMN) se trouvent dans cette faculté, pour un coût total de 7 M€. Deux éléments sont à protéger: l’électronique et le cryoaimant. En effet, la noyade de l’électronique entraînera sa destruction et l’absence de fourniture en fluides cryogéniques engendrerait un coût de 40 k€ par appareil.En Juin 2016, la Seine a connu une crue suffisante pour entrainer des perturbations dans les transports en commun de Paris. Toutefois il ne s’agissait que d’une crue mineure. Comment protéger le matériel en cas de crue majeure ?Dans cette communication, nous verrons l’historique des crues, leur mesure, leurs effets sur les RMN et les mesures préventives à mettre en œuvre, en lien avec le service technique et le service des basses températures de l’université.
Published: 2017

48. Surface-Induced Frustration in Solid State Polymorphic Transition of Native Cellulose Nanocrystals

Author: Niki Baccile, Reeta Salminen, Mehedi Reza, Eero Kontturi, Aalto University, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department of Applied Physics, and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: Polymers and Plastics, media_common.quotation_subject, Crystallization of polymers, Frustration, Bioengineering, 02 engineering and technology, 010402 general chemistry, Microscopy, Atomic Force, 01 natural sciences, Biomaterials, Crystal, chemistry.chemical_compound, symbols.namesake, image analysis, Polymer chemistry, Materials Chemistry, Cellulose, ta216, cellulose nanocrystals, media_common, polymorphic transition, Hydrogen Bonding, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Ethylenediamines, Silicon Dioxide, Exfoliation joint, 0104 chemical sciences, Cellulose nanocrystals, Chemical engineering, chemistry, symbols, host-guest system, Nanoparticles, Adsorption, van der Waals force, surface immobilization, 0210 nano-technology, Dispersion (chemistry)
Abstract: International audience; The presence of an interface generally influences crystallization of polymers from melt or from solution. Here, by contrast, we explore the effect of surface immobilization in a direct solid state polymorphic transition on individual cellulose nanocrystals (CNCs), extracted from a plant-based origin. The conversion from native cellulose I to cellulose III crystal occurred via a host-guest inclusion of ethylene diamine inside the crystal. 60% reduction in CNC width (height) in atomic force microscopy images suggested that when immobilized on a flat modified silica surface, the stresses caused by the inclusion or the subsequent regeneration resulted in exfoliation, hypothetically between the van der Waals bonded sheets within the crystal. Virtually no changes in dimensions were visible when the polymorphic transition was performed to non-immobilized CNCs in bulk dispersion. With reservations and by acknowledging the obvious dissimilarities, the exfoliation of cellulose crystal sheets can be viewed as analogous to exfoliation of 2D structures like graphene from a van der Waals stacked solid. Here, the detachment is triggered by an inclusion of a guest molecule inside a host cellulose crystal and the stresses caused by the firm attachment of the CNC on a solid substrate, leading to detachment of molecular sheets or stacks of sheets.
Published: 2017

49. Development of a Cradle-to-Grave Approach for Acetylated Acidic Sophorolipid Biosurfactants

Author: Christopher A. Mitchell, Bernd Everaert, Wim Soetaert, Katarzyna Ciesielska, Bart Devreese, Lasse Six, Georgia Eleni Tsotsou, Florence Babonneau, Helen Lydon, Anne-Sophie Cuvier, Brecht Vanlerberghe, Inge N. A. Van Bogaert, Roger Marchant, Sophie Roelants, Georgios Tsatsos, Niki Baccile, Elke Theeuwes, Ibrahim M. Banat, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), University of Ulster, Laboratory for Protein Biochemistry and Biomolecular Engineering, Department of Biochemistry, Physiology and Microbiology, Universiteit Gent = Ghent University [Belgium] (UGENT), Bio Base Europe Pilot Plant, Faculty of Bioscience Engineering, Ghent University, Organic Waste Systems (OWS), Ecover Co-ordination Center NV, COSMETIC SP, Universiteit Gent = Ghent University (UGENT), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)
Subjects: 0301 basic medicine, General Chemical Engineering, Biology, 01 natural sciences, 03 medical and health sciences, Environmental Chemistry, [CHIM]Chemical Sciences, Low toxicity, 010405 organic chemistry, Renewable Energy, Sustainability and the Environment, business.industry, Sophorolipid, Starmerella bombicola, General Chemistry, Self-assembly, Biodegradation, Pulp and paper industry, 6. Clean water, Cradle to grave, 0104 chemical sciences, Biotechnology, 030104 developmental biology, Solubilization, Genetic engineering, Fermentation, Antimicrobial, Glycolipids, business, Life cycle analysis
Abstract: International audience; Microbial production of biosurfactants represents one of the most interesting alternatives to classical petrol-based compounds due to their low toxicity, high biodegradability, and biological production processes from renewable bioresources. However, some of the main drawbacks generally encountered are the low productivities and the small number of chemical structures available, which limit widespread application of biosurfactants. Although chemical derivatization of (microbial) biosurfactants offers opportunities to broaden the panel of available molecules, direct microbial synthesis is still the preferred option and the use of engineered strains is becoming a valid alternative. In this multidisciplinary work we show the entire process of conception, upscaling of fermentation (150 L) and sustainable purification (filtration), application (foaming, solubilization, antibacterial), and life cycle analysis of acetylated acidic sophorolipids, directly produced by the Starmerella bombicola esterase knock out yeast strain, rather than purified using chromatography from the classical, but complex, mixture of acidic and lactonic sophorolipids.
Published: 2017

50. A novel PAN/silazane hybrid polymer for processing of carbon-based fibres with extraordinary oxidation resistance

Author: Christel Gervais, Ricardo Antonio Francisco Machado, Olivier Flores, Rhett Kempe, Günter Motz, P. Furtat, Luiz Fernando Belchior Ribeiro, Universität Bayreuth, Spectroscopie, Modélisation, Interfaces pour L'Environnement et la Santé (SMiLES), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC), CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior), DAAD (Deutscher Akademischer Austauschdienst) [PROBRAL 366/11], DFG (Deutsche Forschungsgemeinschaft) [MO851/10], and Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Thermogravimetric analysis, Materials science, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Polysilazane, chemistry.chemical_compound, Organic chemistry, General Materials Science, Ceramic, Nanocomposite, Renewable Energy, Sustainability and the Environment, Polyacrylonitrile, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Chemical engineering, visual_art, visual_art.visual_art_medium, Acrylonitrile, 0210 nano-technology, Carbon, Pyrolysis
Abstract: International audience; A novel hybrid polymer made up of acrylonitrile (AN) and a commercial available oligosilazane (ML33) was developed as a precursor for the processing of carbon-based fibres with extraordinary intrinsic oxidation stability up to 800 degrees C. While polyacrylonitrile is used as the typical precursor for carbon fibres, a polysilazane derived SiCN ceramic phase should lead to improved oxidation resistance. Thermogravimetric analysis demonstrated that depending on the AN/ML33 ratio the weight loss during pyrolysis is drastically reduced up to 63% due to crosslinking reactions between both components, confirmed by NMR spectroscopy investigations. Unexpectedly, with increasing AN content in the starting composition the thermal treatment up to 1500 degrees C leads to a change from amorphous C/SiCN to C/Si3N4 nanocomposites confirmed by NMR, XRD and TEM measurements. The homogeneously distributed ceramic phase within the carbon matrix is responsible for the extraordinary intrinsic oxidation stability of this new type of carbon-based fibre.
Published: 2017

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