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155 results on '"Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)"'

1. High-resolution synchrotron K-edge subtraction CT allows tracking and quantifying therapeutic cells and their scaffold in a rat model of focal cerebral injury and can serve as a reference for spectral photon counting CT

Author: Clément Tavakoli, Elisa Cuccione, Chloé Dumot, Joëlle Balegamire, Salim Aymeric Si-Mohamed, Johoon Kim, Claire Crola-da-Silva, Yves Chevalier, Loïc Boussel, Philippe Douek, David Cormode, Hélène Elleaume, Emmanuel Brun, Marlène Wiart, Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Synchrotron Radiation for Biomedicine = Rayonnement SynchroTROn pour la Recherche BiomédicalE (STROBE), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Grenoble Alpes (UGA), Hospices Civils de Lyon (HCL), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Hôpital Louis Pradel [CHU - HCL], Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), University of Pennsylvania, ANR-18-CE19-0003,BREAKTHRU,Développement de l'imagerie bicolore à l'aide d'un scanner X spectral à comptage de photons pour l'évaluation in-vivo de thérapies cellulaires(2018), European Project: ESRF, European Project: 643694,SPCCT, Wiart, Marlene, APPEL À PROJETS GÉNÉRIQUE 2018 - Développement de l'imagerie bicolore à l'aide d'un scanner X spectral à comptage de photons pour l'évaluation in-vivo de thérapies cellulaires - - BREAKTHRU2018 - ANR-18-CE19-0003 - AAPG2018 - VALID, MD1094 - ESRF - INCOMING, H2020 - SPCCT - 643694 - INCOMING, and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDV] Life Sciences [q-bio], Synchrotron K-edge subtraction CT, [SPI]Engineering Sciences [physics], cell tracking, [SPI] Engineering Sciences [physics], neurology, [SDV]Life Sciences [q-bio], spectral photon-counting CT, Biomedical Engineering, regenerative medicine, Medicine (miscellaneous), Pharmacology, Toxicology and Pharmaceutics (miscellaneous), Biotechnology
Abstract: International audience; Background: The objective of this study was to demonstrate that synchrotron K-edge subtraction tomography (SKES-CT) can simultaneously track therapeutic cells and their encapsulating carrier, in vivo, in a rat model of focal brain injury using a dual-contrast agent approach. The second objective was to determine if SKES-CT could be used as a reference method for spectral photon counting tomography (SPCCT). Methods: Phantoms containing different concentrations of gold and iodine nanoparticles (AuNPS/INPs) were imaged with SKES-CT and SPCCT to assess their performances. A pre-clinical study was performed in rats with focal cerebral injury which intracerebrally received AuNPs-labelled therapeutic cells encapsulated in a INPs-labelled scaffold. Animals were imaged in vivo with SKES-CT and back-to-back with SPCCT. Results: SKES-CT revealed to be reliable for quantification of gold and iodine, whether alone or mixed. In the preclinical model, SKES-CT showed that AuNPs remained at the site of cell injection, while INPs expanded within and/or along the lesion border, suggesting dissociation of both components in the first days post-administration. Compared to SKES-CT, SPCCT was able to correctly locate gold, but not completely located iodine. When SKES-CT was used as reference, SPCCT gold quantification appeared very accurate both in vitro and in vivo. Iodine quantification by SPCCT was also quite accurate, albeit less so than for gold. Conclusion: We here provide the proof-of-concept that SKES-CT is a novel method of choice for performing dual-contrast agent imaging in the context of brain regenerative therapy. SKES-CT may also serve as ground truth for emerging technologies such as multicolour clinical SPCCT.
Published: 2023

2. Exosomal lipids from membrane organization to biomarkers: Focus on an endolysosomal-specific lipid

Author: Françoise Hullin-Matsuda, Pascal Colosetti, Maxence Rabia, Céline Luquain-Costaz, Isabelle Delton, Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), and CarMeN, laboratoire
Subjects: bis(monoacylglycero)phosphate, Proteins, Cell Communication, Lipid trafficking, General Medicine, Extracellular vesicles, Exosomes, Lipids, Biochemistry, Docosahexaenoic acid, [SDV.AEN] Life Sciences [q-bio]/Food and Nutrition, Cholesterol, interest, [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition, Biomarkers
Abstract: The term extracellular vesicles (EVs) has been recommended to describe various membrane-bound vesicles secreted by most living cells and found in various biological fluids. They gained growing interest as mediators of cell-cell communication and for their roles in different patho-physiological processes. In addition, they were recently considered as disease biomarkers and new drug delivery systems. However, it is still difficult to link a biological function to a specific EV population among the heterogenous EV mixture secreted in the extracellular space due to limitations of optimal isolation methods. EV classification according to their size as small (\textless200 nm) and large (\textgreater200 nm) vesicles is also completed by the identification of selected proteins, nucleic acids and lipids. In this review, we summarized briefly knowledge about the composition and role of EV lipids that received less attention compared to their protein and nucleic acid content. Lipids are not only essential structural components of EVs, but can give important information on their biogenesis. Especially, we discussed our recent data showing the utility of bis(monoacylglycero)phosphate (BMP), a specific endolysosomal lipid marker, that could sign the endosomal origin of small EVs, classically named as exosomes.
Published: 2022

3. Steady state population balance modelling of precipitation processes: nucleation, growth and size-dependent agglomeration

Author: Cristian Camilo Ruiz Vasquez, Noureddine Lebaz, Isabelle Ramière, Sophie Lalleman, Denis Mangin, Murielle Bertrand, Département de recherche sur les procédés pour la mine et le recyclage du combustible (DMRC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), CEA, DES, IRESNE, DEC, SESC Cadarache F-13108 Saint-Paul-Lez-Durance, France, and ORANO
Subjects: Inorganic Chemistry, Population balance, [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment, Materials Chemistry, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Size-dependent agglomeration, Condensed Matter Physics, Fixed point algorithm
Abstract: International audience
Published: 2023

4. Nanoemulsions Embedded in Alginate Beads as Bioadhesive Nanocomposites for Intestinal Delivery of the Anti-Inflammatory Drug Tofacitinib

Author: Valentina Andretto, Giuseppe Taurino, Giulia Guerriero, Hanäé Guérin, Emmanuelle Lainé, Massimiliano G. Bianchi, Géraldine Agusti, Stéphanie Briançon, Ovidio Bussolati, Alexandra Clayer-Montembault, Giovanna Lollo, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Università degli studi di Parma = University of Parma (UNIPR), Microbiologie Environnement Digestif Santé (MEDIS), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Clermont Auvergne (UCA), Ingénierie des Matériaux Polymères (IMP), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-18-CE18-0025,HyDNano,Développent d'une nouvelle plateforme pour la libération orale des principes actifs en utilisant un hydrogel chargé en nanoparticules(2018)
Subjects: Biomaterials, Polymers and Plastics, [SDV]Life Sciences [q-bio], Materials Chemistry, Bioengineering
Abstract: International audience; Oral administration of nanoparticles (NPs) is a promising strategy to overcome solubility and stability issues of many active compounds. However, this route faces major obstacles related to the hostile gastrointestinal (GI) environment, which impairs the efficacy of orally administered nanomedicines. Here, we propose nanocomposites as a promising approach to increase the retention time of NPs in the intestinal tract by using bio-and mucoadhesive matrixes able to protect the cargo until it reaches the targeted area. A microfluidic-based approach has been applied for the production of tailored nanoemulsions (NEs) of about 110 nm, used for the encapsulation of small hydrophobic drugs such as the antiinflammatory JAK-inhibitor tofacitinib. These NEs proved to be efficiently internalized into a mucus-secreting human intestinal monolayer of Caco-2/ HT29-MTX cells and to deliver tofacitinib to subepithelial human THP-1 macrophage-like cells, reducing their inflammatory response. NEs were then successfully encapsulated into alginate hydrogel microbeads of around 300 μm, which were characterized by rheological experiments and dried to create a long-term stable system for pharmaceutical applications. Finally, ex vivo experiments on excised segments of rats′ intestine proved the bioadhesive ability of NEs embedded in alginate hydrogels compared to free NEs, showing the advantage that this hybrid system can offer for the treatment of intestinal pathologies.
Published: 2023

5. Hurdle technology using encapsulated enzymes and essential oils to fight bacterial biofilms

Author: Samah Mechmechani, Simon Khelissa, Adem Gharsallaoui, Khaled El Omari, Monzer Hamze, Nour-Eddine Chihib, Université de Lille, Lebanese German University (LGU), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: Technology, Biofilm Enzymes Essential oils Microencapsulation, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Bacteria, Biofilm, Microbial Sensitivity Tests, General Medicine, Applied Microbiology and Biotechnology, Essential oil, Anti-Bacterial Agents, Enzymes, Anti-Infective Agents, Essential oils, Biofilms, Oils, Volatile, Microencapsulation, Biotechnology
Abstract: Biofilm formation on abiotic surfaces has become a major public health concern because of the serious problems they can cause in various fields. Biofilm cells are extremely resistant to stressful conditions, because of their complex structure impedes antimicrobial penetration to deep-seated cells. The increased resistance of biofilm to currently applied control strategies underscores the urgent need for new alternative and/or supplemental eradication approaches. The combination of two or more methods, known as Hurdle technology, offers an excellent option for the highly effective control of biofilms. In this perspective, the use of functional enzymes combined with biosourced antimicrobial such as essential oil (EO) is a promising alternative anti-biofilm approach. However, these natural antibiofilm agents can be damaged by severe environmental conditions and lose their activity. The microencapsulation of enzymes and EOs is a promising new technology for enhancing their stability and improving their biological activity. This review article highlights the problems related to biofilm in various fields, and the use of encapsulated enzymes with essential oils as antibiofilm agents. KEY POINTS: • Problems associated with biofilms in the food and medical sectors and their subsequent risks on health and food quality. • Hurdle technology using enzymes and essential oils is a promising strategy for an efficient biofilms control. • The microencapsulation of enzymes and essential oils ensures their stability and improves their biological activities.
Published: 2023

6. From netrin‐1‐targeted <scp>SPECT</scp> / <scp>CT</scp> to internal radiotherapy for management of advanced solid tumors

Author: David Kryza, Jennifer Wischhusen, Mathieu Richaud, Maëva Hervieu, Jacqueline Sidi Boumedine, Jean‐Guy Delcros, Sophie Besse, Thomas Baudier, Pierre‐Alexandre Laval, Silvia Breusa, Erwan Boutault, Hugo Clermidy, Nicolas Rama, Benjamin Ducarouge, Mojgan Devouassoux‐Shisheboran, Jean‐Michel Chezal, Anne‐Laure Giraudet, Thomas Walter, Patrick Mehlen, David Sarrut, Benjamin Gibert, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Cancérologie de Lyon (UNICANCER/CRCL), Centre Léon Bérard [Lyon]-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université Clermont Auvergne (UCA), Imagerie Tomographique et Radiothérapie, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Netris Pharma, Partenaires INRAE, and Hospices Civils de Lyon (HCL)
Subjects: netrin, cancer extracellular matrix netrin radioimmunotherapy targeted therapy Subject Categories Cancer Pharmacology & Drug Discovery, extracellular matrix, radioimmunotherapy, Molecular Medicine, cancer, [SDV.CAN]Life Sciences [q-bio]/Cancer, Pharmacology & Drug Discovery, targeted therapy
Abstract: International audience; Targeted radionuclide therapy is a revolutionary tool for the treatment of highly spread metastatic cancers. Most current approaches rely on the use of vectors to deliver radionuclides to tumor cells, targeting membrane-bound cancer-specific moieties. Here, we report the embryonic navigation cue netrin-1 as an unanticipated target for vectorized radiotherapy. While netrin-1, known to be reexpressed in tumoral cells to promote cancer progression, is usually characterized as a diffusible ligand, we demonstrate here that netrin-1 is actually poorly diffusible and bound to the extracellular matrix. A therapeutic anti-netrin-1 monoclonal antibody (NP137) has been preclinically developed and was tested in various clinical trials showing an excellent safety profile. In order to provide a companion test detecting netrin-1 in solid tumors and allowing the selection of therapy-eligible patients, we used the clinical-grade NP137 agent and developed an indium-111-NODAGA-NP137 single photon emission computed tomography (SPECT) contrast agent. NP137-111 In provided specific detection of netrin-1-positive tumors with an excellent signal-to-noise ratio using SPECT/CT imaging in different mouse models. The high specificity and strong affinity of NP137 paved the way for the generation of lutetium-177-DOTA-NP137, a novel vectorized radiotherapy, which specifically accumulated in netrin-1-positive tumors. We demonstrate here, using tumor cell-engrafted mouse models and a genetically engineered mouse model, that a single systemic injection of NP137-177 Lu provides important antitumor effects and prolonged mouse survival. Together, these data support the view that NP137-111 In and NP137-177 Lu may represent original and unexplored imaging and therapeutic tools against advanced solid cancers.
Published: 2023

7. Optimization of Paracetamol and Chloramphenicol Removal by Novel Activated Carbon Derived from Sawdust Using Response Surface Methodology

Author: Mohamed Romdhani, Afef Attia, Catherine Charcosset, Samia Mahouche-Chergui, Ayten Ates, Joelle Duplay, Raja Ben Amar, Université de Sfax - University of Sfax, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie et des Matériaux Paris-Est (ICMPE), Institut de Chimie du CNRS (INC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Cumhuriyet University [Sivas, Turkey], Institut Terre Environnement Strasbourg (ITES), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), PRIMA program, and European Project: 2024,TRUST
Subjects: chloramphenicol, experimental design, Renewable Energy, Sustainability and the Environment, paracetamol, adsorption, [SDE.IE]Environmental Sciences/Environmental Engineering, Geography, Planning and Development, methodology, activated carbon, Building and Construction, [CHIM.MATE]Chemical Sciences/Material chemistry, Management, Monitoring, Policy and Law, response surface
Abstract: Paracetamol (PCT) and chloramphenicol (CPL) can have unfavorable impacts on human health, as well as on natural ecosystems. These substances contribute to the aquatic environment’s contamination and disturb the performance of municipal wastewater treatment systems, causing ecosystem disruption and microbial resistance. In this study, activated carbon produced from sawdust (ACs) was synthesized utilizing the chemical activation process for the removal of both PCT and CPL compounds from an aqueous solution. ACs has a primarily microporous structure with a significant specific surface area of 303–1298 m2/g, total pore volume of 0.462 cm3/g and bimodal distribution of pores of 0.73–1.7 nm. The removal efficiencies for PCT and CPL with the low-cost activated carbon, determined at the optimum dose (750 mg/L for PCT and 450 mg/L for CPL), were significantly high at 85% and 98%, respectively. The adsorption kinetics for both pharmaceuticals exhibited a quick initial decline. For PCT and CPL adsorption, the equilibrium was attained after just 20 and 90 min, respectively. The Langmuir isotherm model and the pseudo-second-order kinetics model offered the best fits for the adsorption of both compounds. Additionally, the central composite design (CCD) and Box–Behnken design (BBD) were used to optimize the experimental adsorption conditions using a response surface methodology (RSM). On the basis of the findings, it is evident that activated carbon made from sawdust may be used as a new, effective alternative adsorbent for removing PCT and CPL in aqueous environments.
Published: 2023

8. Enriched PUFA environment of Leishmania infantum promastigotes promotes the accumulation of lipid mediators and favors parasite infectivity towards J774 murine macrophages

Author: Marine, Leroux, Hana, Bouazizi-Ben Messaoud, Céline, Luquain-Costaz, Lars P, Jordheim, Pauline, Le Faouder, Marie-Paule, Gustin, Karim, Aoun, Philippe, Lawton, Samira, Azzouz-Maache, Isabelle, Delton, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA), Centre de Recherche en Cancérologie de Lyon (UNICANCER/CRCL), Centre Léon Bérard [Lyon]-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre Léon Bérard [Lyon], MetaToul Lipidomics, MetaboHUB-MetaToul, MetaboHUB-Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-MetaboHUB-Génopole Toulouse Midi-Pyrénées [Auzeville] (GENOTOUL), Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut des Maladies Métaboliques et Casdiovasculaires (UPS/Inserm U1297 - I2MC), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut des Maladies Métaboliques et Casdiovasculaires (UPS/Inserm U1297 - I2MC), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre International de Recherche en Infectiologie (CIRI), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Parasitologie, Institut Pasteur de Tunis, Institut Pasteur de Tunis, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), and University of Tunis El Manar
Subjects: reactive oxygen species, [SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases, arachidonic acid, [SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology, lipid mediators, docosahexaenoic acid, Leishmania infantum, macrophages
Abstract: Leishmania parasites are the causative agents of visceral or cutaneous leishmaniasis in humans and of canine leishmaniosis. The macrophage is the predilected host cell of Leishmania in which the promastigote stage is transformed into amastigote. We previously showed changes in the fatty acid composition (FA) of lipids in two strains of Leishmania donovani upon differentiation of promastigote to amastigote, including increased proportions of arachidonic acid (AA) and to a less extent of docosahexaenoic acid (DHA). Here, we carried out supplementation with AA or DHA on two Leishmania infantum strains, a visceral (MON-1) and a cutaneous (MON-24), to evaluate the role of these FA in parasite/macrophage interactions. The proportions of AA or DHA in total lipids were significantly increased in promastigotes cultured in AA- or DHA-supplemented media compared to controls. The content of FA-derived oxygenated metabolites was enhanced in supplemented strains, generating especially epoxyeicosatrienoic acids (11,12- and 14,15-EET) and hydroxyeicosatetraenoic acids (5- and 8- HETE) from AA, and hydroxydocosahexaenoic acids (14- and 17-HDoHE) from DHA. For both MON-1 and MON-24, AA-supplemented promastigotes showed higher infectivity towards J774 macrophages as evidenced by higher intracellular amastigote numbers. Higher infectivity was observed after DHA supplementation for MON-24 but not MON-1 strain. ROS production by macrophages increased upon parasite infection, but only minor change was observed between control and supplemented parasites. We propose that under high AA or DHA environment that is associated with AA or DHA enrichment of promastigote lipids, FA derivatives can accumulate in the parasite, thereby modulating parasite infectivity towards host macrophages.
Published: 2023

9. LMI conditions for contraction, integral action, and output feedback stabilization for a class of nonlinear systems

Author: Giaccagli, Mattia, Andrieu, Vincent, Tarbouriech, Sophie, Astolfi, Daniele, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Équipe Méthodes et Algorithmes en Commande (LAAS-MAC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), ANR-18-CE40-0010,HANDY,Systèmes Dynamiques Hybrides et en Réseau(2018), and ANR-11-LABX-0040,CIMI,Centre International de Mathématiques et d'Informatique (de Toulouse)(2011)
Subjects: LMIs, Contraction, observers, monotonic, [INFO.INFO-SY]Computer Science [cs]/Systems and Control [cs.SY], nonlinear systems, sector bound, integral action, incremental stability, separation principle
Abstract: International audience; This article focuses on the class of linear systems coupled with a nonlinearity satisfying a sector bound or a monotonic condition. First, we present a set of sufficient conditions based on Linear Matrix Inequalities (LMIs) to establish if such a system defines a contraction. Then, we propose a contractive state-feedback control law designed via the use of LMIs which may include nonlinear terms. Furthermore, the design is extended to the case in which an integral action is included in order to achieve constant output regulation. Following a similar approach, the design of contractive observers for the aforementioned class of systems is also considered. Finally, based on previous conditions, we establish a new nonlinear separation principle in which the feedback and the observer gains may be designed independently. Throughout the paper, we illustrate our results by means of practical examples.
Published: 2023

10. Global exponential set-point regulation for linear operator semigroups with input saturation

Author: Daniele Astolfi, Swann Marx, Vincent Andrieu, Christophe Prieur, Centre National de la Recherche Scientifique (CNRS), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Numérique de Nantes (LS2N), Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-École Centrale de Nantes (Nantes Univ - ECN), Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ), GIPSA - Infinite Dimensional Dynamics (GIPSA-INFINITY), GIPSA Pôle Automatique et Diagnostic (GIPSA-PAD), Grenoble Images Parole Signal Automatique (GIPSA-lab), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Grenoble Alpes (UGA), IEEE, ANR-19-CE48-0004,ODISSE,Synthèse d'observateur pour des systèmes de dimension infinie(2019), and ANR-19-P3IA-0003,MIAI,MIAI @ Grenoble Alpes(2019)
Subjects: Sufficient conditions, Control theory, [INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering, Dynamical systems, Linear systems, Stability, Regulation, Generators
Abstract: International audience; In this paper the problem of set-point regulation of linear operator semigroups is considered, in presence of saturation of the control input. It is shown how global exponential stability can still be obtained by adding an anti-windup loop to the integral action. As first contribution towards the solution of this regulation problem, we give some new results related to the characterization of global exponential stability of the equilibrium of a subclass of semi-linear dynamical systems.
Published: 2022

11. Dynamic Salmonella Enteritidis biofilms development under different flow conditions and their removal using nanoencapsulated thymol

Author: Yammine, Jina, Gharsallaoui, Adem, Karam, Layal, Ismail, Ali, Fadel, Alexandre, Chihib, Nour-Eddine, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Libanaise, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Qatar University, University of Lille, Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris ), and Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: Hydrodynamic conditions, Disinfection, Dynamic biofilm, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Salmonella enteritidis, Cell Biology, Nanoencapsulation, Molecular Biology, Applied Microbiology and Biotechnology, Microbiology, Thymol
Abstract: In food industries, microbial contaminations are difficult to control due to the recurrent formation of biofilms that hinders antimicrobials penetration and efficiency. An understanding of Salmonella Enteritidis biofilms behavior under flow conditions is a key to develop efficient preventive and control strategies. S. Enteritidis biofilms displayed 5.96, 6.28 and 6.80 log CFU cm−2 under 0.006 cm s−1, 0.045 cm s−1, and 0.087 cm s−1 flow velocities, respectively. Biofilms exposed to higher nutrient conditions under greater flow rates, induced significantly more biofilm biomass. To control biofilms, the disinfection efficiency of thymol (THY) was assessed under dynamic conditions by encapsulation it into two types of nanocapsules: monolayer (ML) nanocapsules prepared with a single carrier material (maltodextrin), and layer-by-layer (LBL) nanocapsules prepared by combining two carrier materials (maltodextrin and pectin). A combined mixture of ML and LBL nanocapsules at ½ their minimal inhibitory concentrations induced 99.99% eradication of biofilms developed under the highest flow conditions, after 5 h. ML nanocapsules decreased significantly bacterial counts during the first 0.5 h, while LBL nanocapsules eliminated the remaining bacterial cells and ensured a protection from bacterial contamination for up to 5 h by releasing THY in a sustained manner over time due to the thicker shell wall structure. The authors are grateful to Dr. Heni Dallagi and Laurent Wauquier for their valuable technical assistance. The Chevreul Institute is also thanked for its help in the development of this work through the ARCHI-CM project supported by the “Ministère de l’Enseignement Supérieur de la Recherche et de l’Innovation”, the region “Hauts-de-France”, the ERDF program of the European Union and the “Métropole Européenne de Lille.
Published: 2022

12. Continuous and intensified membrane crystallization process : quality control of an active pharmaceutical ingredient

Author: Kalakech, Carla, Charcosset, C., Monnot, Mathias, Mangin, Denis, Gagnière, E., Lafont, Sylvaine, Hir, Morgane Le, Baltes, David, Chabanon, E, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique, Modélisation et Procédés Propres (M2P2), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), SANOFI Recherche, and ANR-21-CE04-0008,MEMCRYST,Procédé continu et intensifié de cristallisation membranaire : Contrôle de la qualité de principes Actifs Pharmaceutiques(2021)
Subjects: [CHIM.GENI]Chemical Sciences/Chemical engineering, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering
Abstract: International audience
Published: 2022

13. Infinite gain margin, contraction and optimality: an LMI-based design

Author: Mattia Giaccagli, Vincent Andrieu, Sophie Tarbouriech, Daniele Astolfi, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Équipe Méthodes et Algorithmes en Commande (LAAS-MAC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), and Université de Toulouse (UT)
Subjects: General Engineering, [INFO.INFO-SY]Computer Science [cs]/Systems and Control [cs.SY]
Abstract: International audience; In this paper we focus on nonlinear systems composed by a linear term plus a nonlinearity satisfying a monotonic or a sector bound condition. We present sufficient conditions based on LMIs for the design of a feedback control law possessing an infinite gain margin property that makes the closed-loop system to define a contraction. Then, we analyze the connection between infinite gain margin contractive feedbacks and optimization problems by showing how such an infinite gain control design minimizes a given cost function. A practical case of study is given to illustrate our results.
Published: 2022

14. Procédé continu et intensifié de cristallisation membranaire : Contrôle de la qualité d’un principe actif pharmaceutique

Author: Kalakech, C., Charcosset, C., Monnot, Mathias, Gagnière, E., Mangin, Denis, Baltes, David, Clair, Thomas, Hir, Morgane Le, Lafont, Sylvaine, Chabanon, E, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique, Modélisation et Procédés Propres (M2P2), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), SANOFI Recherche, and ANR-21-CE04-0008,MEMCRYST,Procédé continu et intensifié de cristallisation membranaire : Contrôle de la qualité de principes Actifs Pharmaceutiques(2021)
Subjects: [CHIM.GENI]Chemical Sciences/Chemical engineering
Published: 2022

15. Solution du bilan de population à l'état stationnaire dans le contexte de la précipitation oxalique dans un réacteur à effet vortex

Author: Ruiz Vasquez, Cristian Camilo, Lebaz, Noureddine, Ramière, Isabelle, Mangin, Denis, Bertrand, Murielle, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Département de recherche sur les procédés pour la mine et le recyclage du combustible (DMRC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
Subjects: [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, ComputingMilieux_MISCELLANEOUS
Abstract: National audience
Published: 2022

16. Preparation and Characterization of Microcapsules Containing Antioxidant Fish Protein Hydrolysates: a New Use of Bycatch in Brazil

Author: Nour-Eddine Chihib, Simon Khelissa, Adem Gharsallaoui, Wagner Cotroni Valenti, Tavani Rocha Camargo, Emilie Dumas, Jian Wang, Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University (UNESP), Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Universidade Estadual Paulista (Unesp), Centrale Lille, and CNRS
Subjects: Fish Proteins, 0106 biological sciences, 0301 basic medicine, Antioxidant, Protein Hydrolysates, DPPH, [SDV]Life Sciences [q-bio], medicine.medical_treatment, Fisheries, Capsules, Biology, 01 natural sciences, Applied Microbiology and Biotechnology, Antioxidants, Hydrolysate, Paralonchurus brasiliensis, 03 medical and health sciences, chemistry.chemical_compound, Nutraceutical, Micropogonias furnieri, 010608 biotechnology, Zeta potential, medicine, Animals, Food science, Microencapsulation, Pea protein, food and beverages, Biological activity, Perciformes, Shrimp, 030104 developmental biology, chemistry, Brazil, Pea Proteins
Abstract: Made available in DSpace on 2021-06-25T10:56:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-04-01 In this study, we evaluated the effect of complexation and microencapsulation with pea protein on the antioxidant activity of protein hydrolysates from bycatch in Brazil. The zeta potential values of complexes changed from negative to positive with the increase of pea protein as a result of positively charged complexes formation. The increase in the ratio of pea protein/hydrolysates also resulted in increased turbidity in all samples. Particle size measurements indicated that the complexes tended to form larger aggregates (ranged from 61.5 ± 1.7 μm to 183 ± 2.8 μm). The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of the pea protein/fish protein hydrolysate complexes was higher than that of the protein hydrolysates alone. Moreover, increasing levels of pea protein did not affect the antioxidant activity of fish protein hydrolysates. The complexes of the Paralonchurus brasiliensis were chosen for the microencapsulation process by spray-drying. The results revealed that spray-drying did not have a significant effect (P > 0.05) on the protein hydrolysate antioxidant activity when they were complexed with pea protein. Thus, this work suggests that the complexation with pea protein and subsequent microencapsulation by spray-drying is an efficient way to protect the biological activity of protein hydrolysates obtained from bycatch. This study provides evidence for the potential use of bycatch from shrimp fisheries as functional ingredients or nutraceuticals. São Paulo State University (UNESP), Aquaculture Center, Campus Jaboticabal UMR 8207 - UMET - Unité Matériaux Et Transformations Univ Lille CNRS INRAE Centrale Lille LAGEPP UMR 5007 Univ Lyon Université Claude Bernard Lyon 1 CNRS, 43 Bd 11 Novembre 1918 São Paulo State University (UNESP), Aquaculture Center, Campus Jaboticabal
Published: 2021

17. Nanoemulsion-Based Multilayer Films for Ground Beef Preservation: Antimicrobial Activity and Physicochemical Properties

Author: Fatemeh Baghi, Sami Ghnimi, Emilie Dumas, Nour-Eddine Chihib, Adem Gharsallaoui, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Isara, Unité Matériaux et Transformations - UMR 8207 (UMET), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: antimicrobial activity, pectin film, nanoemulsion, ethylcellulose, multilayer packaging, Organic Chemistry, Pharmaceutical Science, Analytical Chemistry, Chemistry (miscellaneous), Drug Discovery, Molecular Medicine, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Physical and Theoretical Chemistry
Abstract: International audience; This study aimed to improve the physical, mechanical, and biological properties of a monolayer pectin (P) film containing nanoemulsified trans-Cinnamaldehyde (TC) by incorporating it between inner and outer layers of ethylcellulose (EC). The nanoemulsion had an average size of 103.93 nm and a zeta potential of −46 mV. The addition of the nanoemulsion increased the opacity of the film, reduced its moisture absorption capacity, and improved its antimicrobial activity. However, the tensile strength and elongation at break of the pectin films decreased after the incorporation of nanoemulsions. Multilayer films (EC/P/EC) showed a higher resistance to breaking and better extensibility compared to monolayer films. The antimicrobial activity of both mono and multilayer films was effective in inhibiting the growth of foodborne bacteria during storage of ground beef patties at 8 °C for 10 days. This study suggests that biodegradable antimicrobial multilayer packaging films can be effectively designed and applied in the food packaging industry.; Cette étude visait à améliorer les propriétés physiques, mécaniques et biologiques d'un film monocouche de pectine (P) contenant du trans-cinnamaldéhyde (TC) nanoémulsifié en l'incorporant entre les couches internes et externes d'éthylcellulose (EC). La nanoémulsion avait une taille moyenne de 103,93 nm et un potentiel zêta de -46 mV. L'ajout de la nanoémulsion a augmenté l'opacité du film, réduit sa capacité d'absorption de l'humidité et amélioré son activité antimicrobienne. Cependant, la résistance à la traction et l'élongation à la rupture des films de pectine ont diminué après l'incorporation des nanoémulsions. Les films multicouches (EC/P/EC) ont montré une plus grande résistance à la rupture et une meilleure extensibilité que les films monocouches. L'activité antimicrobienne des films monocouches et multicouches a permis d'inhiber la croissance des bactéries d'origine alimentaire pendant le stockage de galettes de bœuf haché à 8 °C pendant 10 jours. Cette étude suggère que les films d'emballage multicouches biodégradables et antimicrobiens peuvent être conçus et appliqués efficacement dans l'industrie de l'emballage alimentaire.
Published: 2023

18. Zermelo-Markov-Dubins with two trailers

Author: Jean-Baptiste Pomet, Ludovic Sacchelli, Jean-Baptiste Caillau, Thierry Combot, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Université Côte d'Azur, CNRS, LJAD, Partenaires INRAE, Mathematics for Control, Transport and Applications (McTAO), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Institut de Mathématiques de Bourgogne [Dijon] (IMB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire Jean Alexandre Dieudonné (JAD), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Université Côte d'Azur (UCA), Laboratoire Jean Alexandre Dieudonné (LJAD), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université de Bourgogne (UB)
Subjects: 0209 industrial biotechnology, 021103 operations research, Kovacic algorithm, Markov chain, turnpike, Plane (geometry), Mathematical analysis, Trailer, 0211 other engineering and technologies, 02 engineering and technology, integrability, Curvature, Zermelo navigation, Hamiltonian system, 020901 industrial engineering & automation, Maximum principle, Flow (mathematics), Control and Systems Engineering, [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], minimum time, Towing, Mathematics
Abstract: International audience; We study the minimum time problem for a simplified model of a ship towing a long spread of cables. Constraints are on the curvature of the trajectory as well as on the shape of what represent the spread of cables here. This model turns out to be the same as a cart towing two trailers and rolling without sleeping on a plane in uniform translation. We analyse the Hamiltonian system describing the extremal flow given by Pontrjagin maximum principle. We detail the equilibria of the system and prove that, contrary to the case of one trailer studied previously by part of the authors, it is not solvable by quadratures. Preliminary numerical results are given.
Published: 2021

19. Control of the single atom/nanoparticle ratio in Pd/C catalysts to optimize the cooperative hydrogenation of alkenes

Author: Camila Rivera‐Cárcamo, Alain Favre-Réguillon, C. de Bellefon, Iann C. Gerber, Boris Guicheret, Régis Philippe, J. Audevard, I. del Rosal, Bruno F. Machado, R. Castro Contreras, Laurent Vanoye, Philippe Serp, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-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-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique et chimie des nano-objets (LPCNO), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), Laboratoire de Génie des Procédés Catalytiques (LGPC), École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Conservatoire National des Arts et Métiers [CNAM] (CNAM), Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM) Departamento de Tecnologia Quimica e Biologica Escola Superior de Tecnologia e Gestao (LSRE-LCM), Instituto Politecnico de Braganca, Fundação para a Ciência e a Tecnologia, CONICYT, Région Auvergne-Rhône-Alpes (contract number 15 021131 01 – CNR006), ANR-19-CE07-0030,COMET,Catalyse Coopérative Entre Atomes Et Nanoparticules Métalliques(2019), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Fédération de recherche « Matière et interactions » (FeRMI), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), and HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)
Subjects: chemistry.chemical_classification, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Chemistry, Alkene, Inorganic chemistry, Nanoparticle, chemistry.chemical_element, [CHIM.CATA]Chemical Sciences/Catalysis, 02 engineering and technology, Orders of magnitude (numbers), 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Oxygen, Catalysis, 0104 chemical sciences, Hydrogen spillover, 0210 nano-technology, Dispersion (chemistry), Isomerization
Abstract: International audience; We recently reported (R. Castro Contreras, B. Guicheret, B. F. Machado, C. Rivera-Cárcamo, M. A. Curiel Alvarez, B. Valdez Salas, M. Ruttert, T. Placke, A. Favre Réguillon, L. Vanoye, C. de Bellefon, R. Philippe and P. Serp, J. Catal., 2019, 372, 226–244) that a structure/activity correlation exists in Pd/C catalysts for myrcene hydrogenation, which integrates the Pd dispersion, and the surface concentration of oxygen groups and defects of the support. Here, through a combined experimental–theoretical study, we provide an explanation of the influence of these three structural characteristics of Pd/C catalysts for alkene hydrogenation. Highly dispersed Pd nanoparticles (PdNP) are necessary to activate dihydrogen. A high concentration of surface defects on the support is necessary to stabilize Pd single atoms (PdSA), which coexist with PdNP on Pd/C catalysts. A high concentration of oxygenated surface groups is also necessary on the support to allow hydrogen spillover. We demonstrate that such a combination allows cooperative catalysis to operate between PdNP and PdSA that involves the formation of PdSA–H species, which are much more active than PdNP–H for alkene hydrogenation but also isomerization. Importantly, we also report an efficient method to control the ratio between PdSA and PdNP in Pd/C catalysts of similar loadings and show that the control of this ratio allows the development of a new generation of stable and highly active catalysts integrating the ultra-rational use of precious metals in short supply. Indeed, for myrcene hydrogenation, activity variations of several orders of magnitude were measured as a function of the value of this ratio.
Published: 2021

20. Steady state population balance solution: application to neodymium oxalate precipitation in a vortex reactor

Author: Ruiz Vasquez, Cristian Camilo, Lebaz, Noureddine, Ramière, Isabelle, Mangin, Denis, Bertrand, Murielle, Département de recherche sur les procédés pour la mine et le recyclage du combustible (DMRC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
Subjects: [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2022

21. Conditions of nisin production by Lactococcus lactis subsp. lactis and its main uses as a food preservative

Author: Simon Khelissa, Nour-Eddine Chihib, Adem Gharsallaoui, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Food preservation, Preservative, [SDV]Life Sciences [q-bio], medicine.disease_cause, Biochemistry, Microbiology, Industrial Microbiology, 03 medical and health sciences, chemistry.chemical_compound, polycyclic compounds, Genetics, medicine, Food science, Molecular Biology, Nisin, 030304 developmental biology, 0303 health sciences, Growth medium, biology, 030306 microbiology, Lactococcus lactis, food and beverages, Pathogenic bacteria, Lactic acid bacteria (LAB), General Medicine, biology.organism_classification, Culture Media, chemistry, Fermentation, Food Preservatives, bacteria, Bacteria, Production yields
Abstract: International audience; Nisin is a small peptide produced byLactococcus lactisssplactisthat is currently industrially produced. This preservative is often used for growth prevention of pathogenic bacteria contaminating the food products. However, the use of nisin as a food preservative is limited by its low production during fermentation. This low production is mainly attributed to the multitude of parameters influencing the fermentation progress such as bacterial cells activity, growth medium composition (namely carbon and nitrogen sources), pH, ionic strength, temperature, and aeration. This review article focuses on the main parameters that affect nisin production byLactococcus lactisbacteria. Moreover, nisin applications as a food preservative and the main strategies generally used are also discussed.
Published: 2020

22. Magnetic nanoparticles in microfluidic and sensing: From transport to detection

Author: Abdelhamid Errachid, Nadia Zine, Hamdi Ben Halima, Abdelhamid Elaissari, Sumera Khizar, Nasir M. Ahmad, National University of Sciences and Technology [Islamabad] (NUST), Micro & Nanobiotechnologies, Institut des Sciences Analytiques (ISA), Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Sumera Khizar acknowledges the financial support of Higher Education Commission, Pakistan for the scholarship and IRSIP program grant No. 9046 for visit to Univ Lyon, University Claude Bernard Lyon-1, CNRS, LAGEP-UMR, Lyon, France. Hamdi Ben Halima acknowledges the funding through the European Union's Horizon 2020 research and innovation program entitled (An integrated POC solution for non-invasive diagnosis and therapy monitoring of Heart Failure patients, KardiaTool) under grant agreement No 768686. Dr. Nasir M. Ahmad acknowledges the support of Higher Education Commission (HEC), NRPU Project No. 3526 and 6020 and TDF-02-164., European Project: 768686,KardiaTool, Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Materials science, Point-of-Care Systems, Clinical Biochemistry, Microfluidics, Context (language use), Nanotechnology, Biosensing Techniques, 02 engineering and technology, 01 natural sciences, Biochemistry, Analytical Chemistry, law.invention, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, law, Lab-On-A-Chip Devices, Microsystem, Miniaturization, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Magnetite Nanoparticles, ComputingMilieux_MISCELLANEOUS, Microscale chemistry, 010401 analytical chemistry, Microfluidic Analytical Techniques, Lab-on-a-chip, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Magnetic nanoparticles, 0210 nano-technology, Biosensor
Abstract: Superparamagnetic nanoparticles are attracting significant attention. Therefore, being explored in microsystems for a wide range of applications. Typical examples include lab-on-a-chip and microfluidics for synthesis, detection, separation, and transportation of different bioanalytes, such as biomolecules, cells, and viruses to develop portable, sensitive, and cost-effective biosensing systems. Particularly, microfluidic systems incorporated with magnetic nanoparticles and, in combination with magnetoresistive sensors, shift diagnostic and analytical methods to a microscale level. In this context, nanotechnology enables the miniaturization and integration of a variety of analytical functions in a single chip for manipulation, detection, and recognition of bioanalytes reliably and flexibly. In consideration of the above, recent development and benefits are elaborated herein to discuss the role of magnetic nanoparticles inside the microchannels to design highly efficient disposable point-of-care applications from transportation to the detection of bioanalytes.
Published: 2020

23. Fixed point convergence and acceleration for steady state population balance modelling of precipitation processes: application to neodymium oxalate

Author: Cristian Camilo Ruiz Vasquez, Isabelle Ramière, Noureddine Lebaz, Murielle Bertrand, Denis Mangin, Sophie Lalleman, Département de recherche sur les procédés pour la mine et le recyclage du combustible (DMRC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: Discretization, General Chemical Engineering, Population, Population balance equation, 02 engineering and technology, oxalic precipitation, Fixed point, 01 natural sciences, 010305 fluids & plasmas, Acceleration, [CHIM.GENI]Chemical Sciences/Chemical engineering, 020401 chemical engineering, 0103 physical sciences, Convergence (routing), Initial value problem, Applied mathematics, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, steady state, convergence acceleration, 0204 chemical engineering, education, ComputingMilieux_MISCELLANEOUS, Mathematics, education.field_of_study, Steady state, General Chemistry, population balance, fixed point solution
Abstract: International audience; The present work focuses on the development of a performing numerical methodology to solve the steady state Population Balance Equation (PBE) including nucleation, independent size growth and loose agglomeration as crystallization mechanisms. The methodology is based on the solution of two PBEs: one for the isolated crystallites and one describing the loose agglomerates formation. Both are solved by a discretization method and only the last one is reformulated as a fixed point problem. The algorithm solving PBE for agglomeration includes the crossed-secant algorithm as a fixed point acceleration method. The numerical PBE solution method is first validated by comparison to analytical solutions and then applied to the neodymium oxalate precipitation in order to compare to experimental results in a wide range of operating conditions. The methodology is tested under highly restrictive numerical conditions: narrow tolerances, a large amount of points in the discretization scheme and a zero vector as initial condition. The crossed-secant method demonstrates to improve the robustness of the standard fixed point iterations by ensuring the convergence of the agglomerates PBE when penalizing conditions are applied and by reducing the number of iterations otherwise. In all cases, the developed methodology predicts accurately the crystal size distribution under the experimental uncertainty in a reasonable computation time and number of iterations.
Published: 2022

24. LMI-Based Stubborn and Dead-Zone Redesign in Linear Dynamic Output Feedback

Author: Sophie Tarbouriech, Angelo Alessandri, Daniele Astolfi, Luca Zaccarian, Équipe Méthodes et Algorithmes en Commande (LAAS-MAC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Università degli studi di Genova = University of Genoa (UniGe), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), University of Trento [Trento], and ANR-18-CE40-0010,HANDY,Systèmes Dynamiques Hybrides et en Réseau(2018)
Subjects: Control and Optimization, sector conditions, Noise measurement, Linear matrix inequalities, Linear systems, Vehicle dynamics, Saturation, Output feedback, Symmetric matrices, Control and Systems Engineering, dead-zone, [INFO.INFO-SY]Computer Science [cs]/Systems and Control [cs.SY], Observers, LMI
Abstract: International audience; The redesign of output feedback controllers for linear systems based on adaptive saturation (stubborn) and dead-zone redesign is investigated by showing that input-to-state stability holds in closed loop upon the satisfaction of linear matrix inequalities. Such results are obtained by using sector conditions that are involved in the Lyapunov analysis in order to ensure input-to-state stability. A simulation case study shows the effectiveness of the proposed redesign in denoising and outlier attenuation with increased accuracy and precision.
Published: 2022

25. ColHySE: An Advanced Column Hydrodynamic-based model for Solvent Extraction

Author: Sophie Charton, Simone Castellano, Samer Alzyod, Nida Sheibat-Othman, Département de recherche sur les procédés pour la mine et le recyclage du combustible (DMRC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics::Fluid Dynamics, two-phase flow, population balance equation, averaged kernels, [CHIM.GENI]Chemical Sciences/Chemical engineering, General Chemical Engineering, Solvent extraction column, General Chemistry, advanced hydrodynamics description
Abstract: International audience; An original one dimensional population balance model (PBM)-based model of liquid-liquid extraction columns is reported. Compared to existing simulators, ColHySE implements a more realistic description of the flow patterns in the contactor, and predicts its effect on the local droplet-droplet interactions (i.e. breakage and coalescence rates). Proper turbulent properties, extracted from single-phase flow CFD simulations, are used in the source terms of the PBM to evaluate locally the inhomogeneous breakage and coalescence rates, using the averaged Coulaloglou and Tavlarides kernels (Castellano et al., 2018). The sensitivity of the predicted droplets mean diameter, d32, and the holdup, , to the parameters of the used empirical and phenomenological models, on the one hand, and to the operating conditions of the column, on the other hand, was studied. Although some model parts must be refined, and an experimental validation remains necessary, the results confirm that the 1D-PBM methodology used in ColHySE is relevant for predicting the interfacial area in the pulsed column as a function of the operating conditions and geometry, hence highlighting its relevance to study the hydrodynamic stability and the tendency to flooding. The sensitivity analysis has moreover highlighted the needs for an improved slip velocity model.
Published: 2022

26. Triggering Xylitol crystallization in a 42 kWhth shell and tubes latent heat thermal energy storage system

Author: Piquard, Louis, Gagnière, Emilie, Largiller, Grégory, Mangin, Denis, Bentivoglio, Fabrice, Université grenoble alpes, CEA, LITEN,DTGH, SSETI, LGST, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Energy Engineering and Power Technology, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Industrial and Manufacturing Engineering
Abstract: International audience
Published: 2023

27. Enhanced antimicrobial, antibiofilm and ecotoxic activities of nanoencapsulated carvacrol and thymol as compared to their free counterparts

Author: Jina Yammine, Adem Gharsallaoui, Alexandre Fadel, Samah Mechmechani, Layal Karam, Ali Ismail, Nour-Eddine Chihib, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Libanaise, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA), Université de Lille, and Qatar University
Subjects: Salmonella enteritidis, Carvacrol, Antibiofilm activity, [SDE]Environmental Sciences, Nanoencapsulation, Ecotoxicity, Thymol, Food Science, Biotechnology
Abstract: Essential oils active components emerged as captivating antimicrobials to control biofilms developed on food contact surfaces. Free and nanoencapsulated carvacrol (CAR) and thymol (THY) were assessed as antimicrobials against Salmonella Enteritidis biofilms adhered to stainless steel. The developed spherical nanocapsules using the spray-drying technique showed an average size ranged between 159.25 and 234.76 nm and zeta potential values ranged between 23.60 and 24.66 mV. The minimal inhibitory concentrations (MIC) of free THY and CAR were both 1.25 mg L-1. Nanoencapsulation reduced MIC values to 0.62 mg L-1 (THY) and 0.31 mg L-1 (CAR). Furthermore, the exposure to free and nanoencapsulated CAR and THY induced a destabilization of bacterial membranes with obvisous morphological deformations and a pronounced leakage of potassium ions and green fluorescent proteins. Eradication of S. Enteritidis biofilms developed on stainless steel was achieved following a 15 min treatment with nanoencapsulated CAR and THY at 2 MIC. Free antimicrobial exposures induced up to 4.27 log CFU cm(-2) reductions. Additionally, the ecotoxicity tests against Daphnia magna crustaceans reported a non-toxicity of both free and nanoencapsulated CAR and THY after 48 h exposure. Thereby, both CAR and THY antimicrobials proved to be promising natural surface disinfectants that require further exploration and incorporation in food industries.
Published: 2023

28. Reinforcement Learning Policies With Local LQR Guarantees For Nonlinear Discrete-Time Systems

Author: Zoboli, Samuele, Andrieu, Vincent, Astolfi, Daniele, Casadei, Giacomo, Dibangoye, Jilles, Nadri, Madiha, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Robots coopératifs et adaptés à la présence humaine en environnements dynamiques (CHROMA), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-CITI Centre of Innovation in Telecommunications and Integration of services (CITI), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), Ampère, Département Automatique pour l'Ingénierie des Systèmes (AIS), Ampère (AMPERE), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), ANR-19-CE23-0006,DeLiCio,Données et a priori, apprentissage et contrôle(2019), and Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: [INFO.INFO-SY]Computer Science [cs]/Systems and Control [cs.SY], [INFO]Computer Science [cs], [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI]
Abstract: International audience; Optimal control of nonlinear systems is a difficult problem which has been addressed by both the Control Theory (CT) and Reinforcement Learning (RL) communities. Frequently, the former relies on the linearization of the system thus obtaining only local guarantees. The latter relies on data to build model-free controllers, focused solely on performances. In this paper we propose a methodology to combine the advantages of both approaches, casting the formulation of an optimal local Linear Quadratic Regulator (LQR) into a Deep RL problem. Our solution builds on the linear framework to derive a learnt nonlinear controller showing local stability properties and global performances.
Published: 2021

29. Approximate observability and back and forth observer of a PDE model of crystallization process

Author: Brivadis, Lucas, Sacchelli, Ludovic, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), ANR-19-CE48-0004,ODISSE,ODISSE: Observer Design for Infinite-dimensional SyStEm(2019), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Mathematics for Control, Transport and Applications (McTAO), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), and ANR-19-CE48-0004,ODISSE,Synthèse d'observateur pour des systèmes de dimension infinie(2019)
Subjects: Optimization and Control (math.OC), FOS: Mathematics, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], Mathematics - Optimization and Control, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract: International audience; In this paper, we are interested in the estimation of Particle Size Distributions (PSDs) during a batch crystallization process in which particles of two different shapes coexist and evolve simultaneously. The PSDs are estimated thanks to a measurement of an apparent Chord Length Distribution (CLD), a measure that we model for crystals of spheroidal shape. Our main result is to prove the approximate observability of the infinite-dimensional system in any positive time. Under this observability condition, we are able to apply a Back and Forth Nudging (BFN) algorithm to reconstruct the PSD.
Published: 2021

30. New perspectives on output feedback stabilization at an unobservable target

Author: Ulysse Serres, Ludovic Sacchelli, Lucas Brivadis, Jean-Paul Gauthier, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Université de Lyon, Laboratoire d'Informatique et Systèmes (LIS), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Université de Toulon (UTLN), ANR-19-CE48-0004,ODISSE,Synthèse d'observateur pour des systèmes de dimension infinie(2019), Institut de recherche sur la biologie de l'insecte UMR7261 (IRBI), Université de Tours-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0209 industrial biotechnology, Control and Optimization, Observability, Dissipative systems, Luenberger observers, 02 engineering and technology, 01 natural sciences, Unobservable, Unitary state, [SPI.AUTO]Engineering Sciences [physics]/Automatic, 020901 industrial engineering & automation, Control theory, FOS: Mathematics, Nonlinear systems, 0101 mathematics, [MATH]Mathematics [math], Mathematics - Optimization and Control, Mathematics, 010102 general mathematics, Representation theory, Observable, Stabilization, Output feedback, Computational Mathematics, Nonlinear system, Optimization and Control (math.OC), Control and Systems Engineering, Dissipative system, Embedding, State (computer science), [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC]
Abstract: We address the problem of dynamic output feedback stabilization at an unobservable target point. The challenge lies in according the antagonistic nature of the objective and the properties of the system: the system tends to be less observable as it approaches the target. We illustrate two main ideas: well chosen perturbations of a state feedback law can yield new observability properties of the closed-loop system, and embedding systems into bilinear systems admitting observers with dissipative error systems allows to mitigate the observability issues. We apply them on a case of systems with linear dynamics and nonlinear observation map and make use of an ad hoc finite-dimensional embedding. More generally, we introduce a new strategy based on infinite-dimensional unitary embeddings. To do so, we extend the usual definition of dynamic output feedback stabilization in order to allow infinite-dimensional observers fed by the output. We show how this technique, based on representation theory, may be applied to achieve output feedback stabilization at an unobservable target.
Published: 2021

31. Water-Soluble Ruthenium (II) Complex Derived From Optically Pure Limonene and Its Microencapsulation Are Efficient Tools Against Bacterial Food Pathogen Biofilms: Escherichia coli, Staphylococcus aureus, Enteroccocus faecalis, and Listeria monocytogenes

Author: Nour-Eddine Chihib, Sakhr Alhuthali, Adem Gharsallaoui, Samah Mechmechani, Simon Khelissa, Alexandre Barras, Yousra El Fannassi, Mohamed Amin El Amrani, Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Université Abdelmalek Essaâdi (UAE), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), NanoBioInterfaces - IEMN (NBI - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), This work was carried out within the framework of TOUBKAL PROJECT No. 43716SB. The authors thank Campus France and the Partenariats Hubert Curien program and Imperial Open Access Fund for their financial support. This program was carried out between Abdelmalek Essaadi University, Faculty of Sciences, Tetouan, Morocco and Lille University, Lille, France., Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: Microbiology (medical), antibacterial agent, complexation, chemistry.chemical_element, biofilm removal, medicine.disease_cause, Microbiology, Bacterial cell structure, Enterococcus faecalis, biofilm, [SPI]Engineering Sciences [physics], 03 medical and health sciences, Minimum inhibitory concentration, Listeria monocytogenes, [SDV.IDA]Life Sciences [q-bio]/Food engineering, medicine, [CHIM.COOR]Chemical Sciences/Coordination chemistry, 0502 Environmental Science and Management, 0503 Soil Sciences, Escherichia coli, 030304 developmental biology, Antibacterial agent, 0303 health sciences, ruthenium (II), biology, 030306 microbiology, Chemistry, biology.organism_classification, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Combinatorial chemistry, QR1-502, Ruthenium, limonene, microencapsulation, food pathogen, Bacteria, 0605 Microbiology
Abstract: Bioactive aminooxime ligands based on optically pure (R)-limonene have been synthesized in two steps. Their ruthenium (II) cationic water-soluble complex was prepared by a reaction between dichloro (para-cymene) ruthenium (II) dimers and aminooxime ligands in a 1:2 molar ratio. Antibacterial and antibiofilm activities of the synthetized complex were assessed against Escherichia coli, Staphylococcus aureus, Listeria monocytogenes, and Enterococcus faecalis. The results revealed that the ruthenium (II) complex has higher antibacterial and antibiofilm activities in comparison with free ligands or the enantiopure (R)-limonene. Moreover, microencapsulation of this complex reduced its cytotoxicity and improved their minimum inhibitory concentration and antibiofilm activity toward the considered bacteria. The ruthenium (II) complex targets the bacterial cell membrane, which leads to rapid leakage of intracellular potassium. Our study suggests that the developed ruthenium (II) complexes could be useful as an alternative to conventional disinfectants.
Published: 2021

32. Imaging of Dysfunctional Elastogenesis in Atherosclerosis Using an Improved Gadolinium-Based Tetrameric MRI Probe Targeted to Tropoelastin

Author: Alkystis Phinikaridou, Giuseppe Digilio, Federico Capuana, Silvio Aime, René M. Botnar, Sergio Padovan, Eyad Almouazen, Begoña Lavin, Laurence Heinrich-Balard, Sara Lacerda, Yves Chevalier, Rachele Stefania, Department of Life Sciences and Systems Biology [University of Turin], University of Turin, School of Biomedical Engineering and Imaging Sciences, King's college London, King‘s College London, Molecular Biotechnology Center, Università degli studi di Torino (UNITO), Universidad Complutense de Madrid = Complutense University of Madrid [Madrid] (UCM), Université d'Orléans (UO), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Pontificia Universidad Católica de Chile: Santiago, Región Metropolitana, CL, IRCCS SDN Napoli, Università degli Studi del Piemonte Orientale, Dipartimento di Scienze e Innovazione Tecnologica, Alessandria, Italy, Centre de biophysique moléculaire (CBM), Université d'Orléans (UO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Pontificia Universidad Católica de Chile (UC), Università degli Studi del Piemonte Orientale - Amedeo Avogadro (UPO), Università degli studi di Torino = University of Turin (UNITO), Université d'Orléans (UO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Martins Vasco de Lacerda, Sara, and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Male, Contrast enhancement, MRI contrast agent, Gadolinium, chemistry.chemical_element, Contrast Media, Peptide, 030204 cardiovascular system & hematology, 01 natural sciences, Article, 03 medical and health sciences, Mice, 0302 clinical medicine, Time windows, Tropoelastin, [CHIM] Chemical Sciences, Drug Discovery, [CHIM]Chemical Sciences, Animals, ComputingMilieux_MISCELLANEOUS, chemistry.chemical_classification, Mice, Knockout, biology, integumentary system, Molecular Structure, 010405 organic chemistry, Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, Surface Plasmon Resonance, Atherosclerosis, Magnetic Resonance Imaging, 0104 chemical sciences, Elastin, Mice, Inbred C57BL, Disease Models, Animal, Biophysics, biology.protein, Molecular Medicine, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Molecular imaging
Abstract: International audience; Dysfunctional elastin turnover plays a major role in the progression of atherosclerotic plaques. Failure of tropoelastin cross-linking into mature elastin leads to the accumulation of tropoelastin within the growing plaque, increasing its instability. Here we present Gd4-TESMA, an MRI contrast agent specifically designed for molecular imaging of tropoelastin within plaques. Gd4-TESMA is a tetrameric probe composed of a tropoelastin-binding peptide (the VVGS-peptide) conjugated with four Gd(III)-DOTA-monoamide chelates. It shows a relaxivity per molecule of 34.0 ± 0.8 mM-1 s-1 (20 MHz, 298 K, pH 7.2), a good binding affinity to tropoelastin (KD = 41 ± 12 μM), and a serum half-life longer than 2 h. Gd4-TESMA accumulates specifically in atherosclerotic plaques in the ApoE-/- murine model of plaque progression, with 2 h persistence of contrast enhancement. As compared to the monomeric counterpart (Gd-TESMA), the tetrameric Gd4-TESMA probe shows a clear advantage regarding both sensitivity and imaging time window, allowing for a better characterization of atherosclerotic plaques.
Published: 2021

33. A compartmental-based approach for the modelling of a vortex precipitation reactor for nuclear energy applications

Author: Ruiz Vasquez, Cristian Camilo, Lebaz, Noureddine, Mangin, Denis, Bertrand, Murielle, Saikali, Elie, Rodio, Maria Giovanna, Bois, Guillaume, Bieder, Ulrich, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'Energie Atomique, Centre de Marcoule (CEA), CEA- Saclay (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2021

34. Delineation of molecular structure modification during coagulation of mixed camel and cow milk by mid‐infrared spectroscopy and parallel factor analysis

Author: Adem Gharsallaoui, Jian Wang, Jasur Safarov, Abderrahmane Aït-Kaddour, Oumayma Boukria, Françoise Leriche, El Mestafa El Hadrami, Université Sidi Mohamed Ben Abdellah (USMBA), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Tashkent State Agrarian University, Tashkent Uzbekistan, Unité Mixte de Recherche sur le Fromage (UMRF), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Clermont Auvergne (UCA)
Subjects: Cow milk, Chromatography, Chemistry, [SDV]Life Sciences [q-bio], General Chemical Engineering, Coagulation (water treatment), Molecule, General Chemistry, Mid infrared spectroscopy, Food Science
Abstract: International audience; Molecular structure modifications of camel milk (CaM) and cow milk (CM) mixtures during coagulation were investigated combining mid-infrared (MIR) spectroscopic monitoring with Parallel Factor Analysis (PARAFAC) and particle-size measurements. To evaluate the structure evolution at the molecular level, five different milk formulations were prepared using the following volume fractions of CaM in the mixtures: 100, 75, 50, 25, and 0. Regarding MIR spectroscopy, wavelength ranges located between 3,000 and 2,800 cm(-1) corresponding to fatty acids; from 1,700 to 1,500 cm(-1), related to amide I and II bands; and in the 1,500-900 cm(-1) range called the fingerprint region were considered for the characterization of milk coagulation kinetics. MIR spectroscopy with PARAFAC was allowed for the identification of modifications at the molecular level depending on the coagulation time and milk composition. This was also confirmed by canonical correlation analysis, which demonstrated a high degree of correlation between the casein particle-size distributions and MIR spectra measured during coagulation. Novelty impact statement PARAFAC coupled with MIR spectroscopy were successfully used to monitor coagulation of CM, CaM, and their mixtures (CaM, CM, 1CaM:1CM, 1CaM:3CM, 3CaM:CM1; v/v). PARAFAC coupled with MIR spectroscopy were successfully used to differentiate between physicochemical phenomenon occurring during coagulation of different mixtures of CM, CaM and their mixtures. Canonical correlation analysis (CCA) of MIR spectra and particle-size distribution during milk coagulation demonstrated a strong relationship between the formation of casein aggregates and the variation of the MIR spectral data.
Published: 2021

35. An auditory cortex model for sound processing

Author: Ludovic Sacchelli, Rand Asswad, Dario Prandi, Giuseppina Turco, Ugo Boscain, Laboratoire des signaux et systèmes (L2S), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de Linguistique Formelle (LLF UMR7110), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Nielsen F., Barbaresco F., Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Control And GEometry (CaGE ), Inria de Paris, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire de Linguistique Formelle (LLF - UMR7110), Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), ANR-20-CE48-0003,RUBIN-VASE,Modélisation sans redondance de la détection visuelle et auditive inspirée de la neurobiologie(2020), and Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)
Subjects: Signal Processing (eess.SP), Kolmogorov operator, Computer science, Speech recognition, 02 engineering and technology, computer.software_genre, Auditory cortex, Heisenberg group, 03 medical and health sciences, Mathematics - Analysis of PDEs, 0302 clinical medicine, FOS: Mathematics, FOS: Electrical engineering, electronic engineering, information engineering, 0202 electrical engineering, electronic engineering, information engineering, [MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP], Electrical Engineering and Systems Science - Signal Processing, Audio signal processing, Mathematics - Optimization and Control, Sound (geography), geography, geography.geographical_feature_category, Quantitative Biology::Neurons and Cognition, Representation (systemics), [SCCO.LING]Cognitive science/Linguistics, Human auditory system, Wilson-Cowan equation, Optimization and Control (math.OC), Computer Science::Sound, 020201 artificial intelligence & image processing, [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], computer, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 030217 neurology & neurosurgery, Analysis of PDEs (math.AP)
Abstract: The reconstruction mechanisms built by the human auditory system during sound reconstruction are still a matter of debate. The purpose of this study is to refine the auditory cortex model introduced in [9], and inspired by the geometrical modelling of vision. The algorithm transforms the degraded sound in an 'image' in the time-frequency domain via a short-time Fourier transform. Such an image is then lifted in the Heisenberg group and it is reconstructed via a Wilson-Cowan differo-integral equation. Numerical experiments on a library of speech recordings are provided, showing the good reconstruction properties of the algorithm., arXiv admin note: substantial text overlap with arXiv:2004.02450
Published: 2021

36. ISS LYAPUNOV STRICTIFICATION VIA OBSERVER DESIGN AND INTEGRAL ACTION CONTROL FOR A KORTEWEG-DE VRIES EQUATION

Author: Ismaila Balogoun, Marx, Swann, Astolfi, Daniele, Laboratoire des Sciences du Numérique de Nantes (LS2N), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-École Centrale de Nantes (Nantes Univ - ECN), Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: backstepping, Nonlinear Sciences::Exactly Solvable and Integrable Systems, Input-to-state stability, Korteweg-de Vries equation, observer, forwarding, [MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP], regulation, integral controller
Abstract: The article deals with the output regulation of a Korteweg-de-Vries (KdV) system subject to a distributed disturbance. The control input and the output are located at the boundary. To achieve this objective, we follow a Lyapunov approach. For that, inspired by the strictication methodology proposed in [42] in the finite-dimensional context, we construct an ISS-Lyapunov functional for the KdV equation thanks to the use of an observer designed via the backstepping approach. Then, thanks to this Lyapunov functional, we apply the forwarding method in order to solve the desired output regulation problem.
Published: 2021

37. Nitrilase immobilization and transposition from a micro-scale batch to a continuous process increase the nicotinic acid productivity

Author: Véronique de Berardinis, Guillaume Nonglaton, Zoé Anxionnaz-Minvielle, Petra Zajkoska, Anne Zaparucha, Gregory Cwicklinski, Chalore Teepakorn, Laboratoire d'automatique et de génie des procédés (LAGEP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Génomique métabolique (UMR 8030), Genoscope - Centre national de séquençage [Evry] (GENOSCOPE), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS), Département Technique Conversion et Hydrogène (DTCH), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de L'Energie Solaire (INES)
Subjects: Packed bed, nitrilase, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Immobilized enzyme, Chemistry, Batch reactor, Substrate (chemistry), nicotinic acid production, Context (language use), General Medicine, continuous biocatalytic process, Enzymes, Immobilized, Applied Microbiology and Biotechnology, Nitrilase, Niacin, Continuous production, chemistry.chemical_compound, Chemical engineering, Aminohydrolases, Biocatalysis, Molecular Medicine, Glutaraldehyde, micro-scale batch process, ComputingMilieux_MISCELLANEOUS, enzyme immobilization
Abstract: In recent years, many biocatalytic processes have been developed for the production of chemicals and pharmaceuticals. In this context, enzyme immobilization methods have attracted attention for their advantages, such as continuous production and increased stability. Here, enzyme immobilization methods and a collection of nitrilases from biodiversity for the conversion of 3-cyanopyridine to nicotinic acid were screened. Substrate conversion over 10 conversion cycles was monitored to optimize the process. The best immobilization conditions were found with cross-linking using glutaraldehyde to modify the PMMA beads. This method showed good activity over 10 cycles in a batch reactor at 30 and 40°C. Finally, production with a new thermostable nitrilase was examined in a continuous packed bed reactor, showing very high stability of the biocatalytic process at a flow rate of 0.12 ml min-1 and a temperature of 50°C. The complete conversion of 3-cyanopyridine was obtained over 30 days of operation. Future steps will concern reactor scale-up to increase the production rate with reasonable pressure drops.
Published: 2021

38. Transparence des algorithmes face à l’open data : quel statut pour les données d’apprentissage ?

Author: Primavera De Filippi, Danièle Bourcier, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'automatique et de génie des procédés (LAGEP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Centre d'études et de recherches de science administrative (CERSA), Centre National de la Recherche Scientifique (CNRS)-Institut Cujas, and Université Panthéon-Assas (UP2)-Université Panthéon-Assas (UP2)
Subjects: [SHS.DROIT]Humanities and Social Sciences/Law, Public Administration, Sociology and Political Science
Abstract: Resume L’utilisation d’algorithmes informatiques au sein des administrations publiques risque d’obfusquer les fondements factuels et juridiques des decisions administratives. Dans l’effort de respecter les principes d’un gouvernement ouvert (open data), le legislateur s’est jusqu’a present focalise sur la transparence de la decision algorithmique, mais rien n’est precise sur les donnees qui vont influencer ces algorithmes. Cet article s’interesse aux problematiques liees a l’application d’algorithmes dans les decisions administratives, et souligne la necessite de garantir non seulement l’acces au code source de ces algorithmes, mais aussi l’acces aux bases de donnees qui les ont entraines.
Published: 2018

39. A switching technique for output feedback stabilization at an unobservable target

Author: Lucas Brivadis, Ludovic Sacchelli, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), ANR-19-CE48-0004,ODISSE,Synthèse d'observateur pour des systèmes de dimension infinie(2019), Mathematics for Control, Transport and Applications (McTAO), Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract: International audience; We consider the problem of dynamic output feedback stabilization at an unobservable target point. The challenge lies in according the antagonistic nature of the objective and the properties of the system: the system tends to be less observable as it approaches the target. In the literature, switching techniques rapidly appeared as a suitable approach to deal with this issue. On a case of systems with linear conservative dynamics and nonlinear output, this approach is used in conjunction with an embedding into bilinear systems that admit observers with dissipative error. Combining these two elements, global stabilization by means of a dynamic periodic time-varying output feedback is proved, and numerical simulations are provided.
Published: 2021

40. Stubborn and Dead-Zone Redesign for Nonlinear Observers and Filters

Author: Luca Zaccarian, Daniele Astolfi, Angelo Alessandri, Centre National de la Recherche Scientifique (CNRS), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Università degli studi di Genova = University of Genoa (UniGe), Équipe Méthodes et Algorithmes en Commande (LAAS-MAC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), ANR-18-CE40-0010,HANDY,Systèmes Dynamiques Hybrides et en Réseau(2018), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), University of Genoa (UNIGE), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: Nonlinear observers, 0209 industrial biotechnology, Dead-zone, input-to-state stability (ISS), nonlinear observers, saturation, Observer (quantum physics), Noise measurement, Computer science, Estimator, 02 engineering and technology, Dead zone, Kalman filter, Lipschitz continuity, Computer Science Applications, input-to-state stability, Nonlinear system, 020901 industrial engineering & automation, Control and Systems Engineering, Control theory, dead-zone, [INFO.INFO-SY]Computer Science [cs]/Systems and Control [cs.SY], Circle criterion, Electrical and Electronic Engineering
Abstract: International audience; We propose a redesign paradigm for stable estima-tors by introducing a saturation or a dead-zone nonlinearity with adaptive thresholds on the output injection term. Such nonlin-earities allow improving the sensitivity to measurement noise in different scenarios (impulsive disturbances or persistent noise such as sensor bias), while preserving the asymptotic convergence properties of the original observer. These redesigns apply to a broad class of state estimators, including linear observers, observers for input-affine systems, observers for Lipschitz systems , observers based on the circle criterion, high-gain observers, standard and extended Kalman filters. Simulation results confirm the effectiveness of both the stubborn and dead-zone redesigns.
Published: 2021

41. On the use of low-pass filters in high-gain observers

Author: Marc Jungers, Daniele Astolfi, Luca Zaccarian, Centre National de la Recherche Scientifique (CNRS), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Équipe Méthodes et Algorithmes en Commande (LAAS-MAC), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), University of Trento [Trento], Centre de Recherche en Automatique de Nancy (CRAN), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), ANR-18-CE40-0010,HANDY,Systèmes Dynamiques Hybrides et en Réseau(2018), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: 0209 industrial biotechnology, General Computer Science, Mechanical Engineering, Low-pass filter, 020208 electrical & electronic engineering, Linear system, Scalar (physics), 02 engineering and technology, Filter (signal processing), High gain observers, Noise analysis, Nonlinear system, Noise, 020901 industrial engineering & automation, Control and Systems Engineering, Control theory, 0202 electrical engineering, electronic engineering, information engineering, Low-pass filters, [INFO.INFO-SY]Computer Science [cs]/Systems and Control [cs.SY], Canonical form, Observability, Electrical and Electronic Engineering, Mathematics
Abstract: International audience; To address the well-known noise sensitivity problems associated with high-gain observers, we insert a low-pass filter on the measurement channel. Considering nonlinear plants in observability canonical form, we first motivate an architecture where the output error is filtered by a linear system parametrized by its arbitrary order and a scalar positive gain. Our main result establishes an exponential finite gain bound for the estimation error, from the measurement noise, this gain being dependent on the high-gain and filter parameters. We also prove bounds depending on the filter parameters characterizing improved high-frequency gains from the measurement noise to the estimation error. The proposed construction is shown to behave desirably in numerical simulations.
Published: 2021

42. Anti-biofilm activity of dodecyltrimethylammonium chloride microcapsules against Salmonella enterica serovar Enteritidis and Staphylococcus aureus

Author: Nour-Eddine Chihib, Alexandre Barras, Noureddine Loukili, Adem Gharsallaoui, Emilie Dumas, Jian Wang, Simon Khelissa, Fouzia Jbilou, charafeddine Jama, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université de Lille, Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), This work was carried out within the framework of ALIBIOTECH program (Agroalimentaire et Biotechnologie). The authors also thank the Haut de France region and FEDER (Fonds Européen de Développement Régional) for their financial support., Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: 0301 basic medicine, Staphylococcus aureus, food.ingredient, Pectin, Salmonella enteritidis, 030106 microbiology, Aquatic Science, medicine.disease_cause, Applied Microbiology and Biotechnology, 03 medical and health sciences, food, Dodecyltrimethylammonium chloride, medicine, Food science, spray drying, Cytotoxicity, Water Science and Technology, Chemistry, Biofilm, food and beverages, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, 030104 developmental biology, anti-biofilm activity, Spray drying, microencapsulation, Intracellular
Abstract: International audience; Dodecyltrimethylammonium chloride (DTAC) was trapped into maltodextrins/pectin spray dried microcapsules to improve its activity against Salmonella enteritidis and Staphylococcus aureus biofilms. Two different microcapsules were prepared: uncomplexed DTAC-microcapsules (UDM), containing DTAC and maltodextrins; and complexed DTAC-microcapsules (CDM) containing DTAC complexed with pectin and maltodextrins. The minimum inhibitory concentrations (MIC) of both free and microencapsulated DTAC were investigated against S. Enteritidis and S. aureus. The MICs of DTAC were significantly lower when encapsulated. CDM treatment resulted in a 2 and 3.2 log reduction in S. aureus and S. Enteritidis biofilm culturable biomass, respectively. Microencapsulation reduced the cytotoxicity of DTAC by up to 32-fold. Free DTAC and CDM targeted the cell membrane resulting in the leakage of the intracellular molecules and subsequent cell death. The development of DTAC microcapsules reduced the amount of DTAC required to maintain the high standards of cleanliness and hygiene required in the food processing industries.
Published: 2021

43. Microencapsulation of benzalkonium chloride enhanced its antibacterial and antibiofilm activity against Listeria monocytogenes and Escherichia coli

Author: Nour-Eddine Chihib, Alexandre Fadel, Fouzia Jbilou, charafeddine Jama, Alexandre Barras, Adem Gharsallaoui, Simon Khelissa, Université de Lille, CNRS, INRA, ENSCL, Unité Matériaux et Transformations - UMR 8207 [UMET], Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG], Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN], Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), NanoBioInterfaces - IEMN (NBI - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: food.ingredient, Pectin, medicine.disease_cause, antibiofilm activity, benzalkonium chloride, Escherichia coli, Listeria monocytogenes, microencapsulation, Applied Microbiology and Biotechnology, 03 medical and health sciences, Benzalkonium chloride, food, Anti-Infective Agents, medicine, Food microbiology, Food science, Cytotoxicity, 030304 developmental biology, 0303 health sciences, 030306 microbiology, Chemistry, Biofilm, food and beverages, General Medicine, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Anti-Bacterial Agents, [SDV.SP.PG]Life Sciences [q-bio]/Pharmaceutical sciences/Galenic pharmacology, Biofilms, Food Microbiology, Antibacterial activity, Benzalkonium Compounds, Biotechnology, medicine.drug
Abstract: International audience; Aims: In this study, benzalkonium chloride (BAC) microcapsules were developed for surface disinfection purpose and were evaluated against Listeria monocytogenes and Escherichia coli biofilms.Methods and Results: Microcapsules were prepared with two different strategies: uncomplexed BAC‐microcapsules (UBM), containing BAC and maltodextrins and complexed BAC‐microcapsules (CBM) containing BAC complexed by pectin and maltodextrins. The minimum inhibitory concentrations (MICs) of free and microencapsulated BAC was investigated against two food pathogens: L. monocytogenes and E. coli. The antibiofilm activities of UBM and CBM against L. monocytogenes and E. coli biofilms formed on stainless steel at 37°C were evaluated and compared to BAC used under its free form. MICs of encapsulated BAC were up to 4‐fold lower than those of free BAC. The UBM and CBM showed higher antibiofilm effect when compared to the free BAC.Conclusions: Overall, results demonstrated that microencapsulation enhanced the antibacterial activity of BAC against L. monocytogenes and E. coli biofilms.Significance and Impact of the Study: The application of such BAC microcapsule‐based delivery systems can improve surface disinfection procedures and reduce the required BAC concentrations and the related cytotoxicity of this antimicrobial compound.
Published: 2021

44. A bio-inspired geometric model for sound reconstruction

Author: Boscain, Ugo, Prandi, Dario, Sacchelli, Ludovic, Turco, Giuseppina, Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Centre National de la Recherche Scientifique (CNRS), Control And GEometry (CaGE ), Inria de Paris, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire des signaux et systèmes (L2S), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Linguistique Formelle (LLF - UMR7110), Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), ANR-15-CE40-0018,SRGI,Géométrie sous-Riemannienne et Interactions(2015), ANR-17-CE40-0007,QUACO,Contrôle quantique : systèmes d'EDPs et applications à l'IRM(2017), ANR-18-IDEX-0001,Université de Paris,Université de Paris(2018), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris-Saclay, Department of Mathematics (Lehigh University), Lehigh University [Bethlehem], Laboratoire de Linguistique Formelle (LLF UMR7110), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), ANR-15-CE40-0018,SRGI,Sub-Riemannian Geometry and Interactions(2015), ANR-17-CE40-0007,QUACO,Contrôle quantique : systèmes d’EDPs et applications à l’IRM(2017), ANR-18-IDEX-0001,BioSpeech,A bio-inspired geometrical model for speech sound reconstruction, and Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: lcsh:Mathematics, Research, [SCCO.LING]Cognitive science/Linguistics, lcsh:QA1-939, [SHS]Humanities and Social Sciences, lcsh:RC321-571, Mathematics - Analysis of PDEs, Audio and Speech Processing (eess.AS), Optimization and Control (math.OC), Quantitative Biology - Neurons and Cognition, FOS: Biological sciences, FOS: Electrical engineering, electronic engineering, information engineering, FOS: Mathematics, [MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP], Neurons and Cognition (q-bio.NC), [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], [MATH]Mathematics [math], Mathematics - Optimization and Control, lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, Electrical Engineering and Systems Science - Audio and Speech Processing, Analysis of PDEs (math.AP)
Abstract: International audience; The reconstruction mechanisms built by the human auditory system during sound reconstruction are still a matter of debate. The purpose of this study is to propose a mathematical model of sound reconstruction based on the functional architecture of the auditory cortex (A1). The model is inspired by the geometrical modelling of vision, which has undergone a great development in the last ten years. There are however fundamental dissimilarities, due to the different role played by the time and the different group of symmetries. The algorithm transforms the degraded sound in an 'image' in the time-frequency domain via a short-time Fourier transform. Such an image is then lifted in the Heisenberg group and it is reconstructed via a Wilson-Cowan differo-integral equation. Preliminary numerical experiments are provided, showing the good reconstruction properties of the algorithm on synthetic sounds concentrated around two frequencies.
Published: 2021

45. Performance studies of indigo dye removal using TiO2 modified clay and zeolite ultrafiltration membrane hybrid system

Author: Mohamed Romdhani, Wala Aloulou, Hajer Aloulou, Catherine Charcosset, Samia Mahouche-Chergui, Benjamin Carbonnier, Raja Ben Amar, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Université de Sfax - University of Sfax, Institut de Chimie et des Matériaux Paris-Est (ICMPE), and Institut de Chimie du CNRS (INC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Indigo blue, [CHIM.GENI]Chemical Sciences/Chemical engineering, Hybrid process, [SDE.IE]Environmental Sciences/Environmental Engineering, Ultrafiltration, Titania-smectite nanocomposites, Adsorption
Abstract: International audience; Dyes contamination causes serious damages to aquatic life and human health. With the increase in these persistent organic contaminants accumulation around the world, performant environmentally friendly and low-cost materials and techniques are required to protect the ecosystem and humans. In this study, the efficacy of titania-smectite nanocomposites (Sm-TiO2 NCs) at removing indigo blue (IB) dye was assessed by both batch adsorption and hybrid treatment combining adsorption and ultrafiltration (UF) processes. During the adsorption, the effect of different parameters on IB removal such as dose of Sm-TiO2, contact time, pH and IB concentration were studied. The optimal conditions were applied for the Sm-TiO2 during dye removal using adsorption/UF hybrid treatment. At 293 K and pH 2.5, an optimized dose of Sm-TiO2 (100 mg/L) removed 73% of the IB from a 25 mg/L solution in 240 min with an equilibrium adsorption capacity greater than 180 mg/g. The adsorption of IB dye by Sm-TiO2 NCs followed the Langmuir adsorption isotherm model and pseudo-second-order kinetics. The thermodynamic studies revealed that the adsorption process was spontaneous and exothermic. When a hybrid process was applied, a higher IB removal capacity has been obtained with a lower dose of Sm-TiO2 compared to the case of the batch adsorption process. In addition, the presence of Sm-TiO2 NCs has been found to reduce the UF membrane fouling. In this case, the adsorption followed by UF treatment applied in two stages was modified to a single-stage hybrid process. Permeate flux was increased from 71 L/h m 2 (only UF) to 182 L/h m 2 (Sm-TiO2 /UF).
Published: 2021

46. Hydrodynamics of gas-liquid co-current flow through a thin sheet of highly porous open cell solid foam

Author: Marion Serres, Thomas Busser, Valérie Vidal, Régis Philippe, Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés Catalytiques (LGPC), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), IFP Energies nouvelles (IFPEN), ANR-10-LABX-0064,Imust,Institut for Multiscale Science and Technology : from Fundamental Physics and Chemistry to Engineering in New Material and Processes and Ecotechnologies(2010), École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL)
Subjects: [PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], Buoyancy, Materials science, General Chemical Engineering, Flow (psychology), 02 engineering and technology, open cell solid foam, engineering.material, Industrial and Manufacturing Engineering, Physics::Fluid Dynamics, multiphase flows, [CHIM.GENI]Chemical Sciences/Chemical engineering, 020401 chemical engineering, Highly porous, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph], 0204 chemical engineering, Joint (geology), Applied Mathematics, porous medium, General Chemistry, Mechanics, Thin sheet, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, hydrodynamics, engineering, Open cell, Current (fluid), 0210 nano-technology, Porous medium
Abstract: International audience; An experimental study of the hydrodynamics of a gas-liquid co-current flow inside a thin sheet of Open Cell Solid Foam (OCSF) confined in a plate reactor is proposed. Image processing is used to quantify the flow patterns when varying the gas and liquid flow rates and buoyancy (horizontal and vertical upflow). The fraction of {\it joint flow} and {\it interface motion} areas, respectively $\varepsilon_m$ and $\varepsilon_i$, are defined as relevant quantities to characterize the different flow regimes and phases interaction. Two distinct regimes are observed for the vertical flow: the low (LA) and high (HA) activity regimes characterized by a low or high phases interaction. In the horizontal configuration, an additional regime is observed and is called pseudo-trickling (PT) regime due to its similarity with the trickling regime observed in vertical downflow packed beds. The transition between LA and HA regimes is compared to the regime transition in trickle beds.
Published: 2020

47. An efficient bio‐inspired catalytic tool for hydrogen release at room temperature from a stable borohydride solution

Author: Pascal Fongarland, Loïc Jierry, David Edouard, Géraldine Agusti, Vincent Ritleng, Laura Birba, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'innovation moléculaire et applications (LIMA), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-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.), Institut Charles Sadron (ICS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés Catalytiques (LGPC), edouard, david, Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon
Subjects: Materials science, Hydrogen, [SPI] Engineering Sciences [physics], [SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, Borohydride, 01 natural sciences, 7. Clean energy, Catalysis, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], [CHIM] Chemical Sciences, [CHIM]Chemical Sciences, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Hydrogen production, Renewable Energy, Sustainability and the Environment, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Fuel Technology, Nuclear Energy and Engineering, chemistry, Chemical engineering, 0210 nano-technology
Abstract: International audience; Commercially available open-cell polyurethane foams (OCPUF) have been successively functionalized with bio-inspired polydopamine coating (OCPUF@PDA), and activated with cobalt nanoparticles (OCPUF@PDA@Co). The resulting soft structured catalytic support (S2CS) has been used as a highly efficient tool for the release of dihydrogen from a commercially available alkaline sodium borohydride solution at room temperature. With a diluted solution containing 0.4 wt% NaBH4 and 0.4 wt% NaOH, the hydrogen generation rate was of 76.4 ± 3.18 L h−1 gcat−1 after stabilization of the catalytic activity. The catalytic tool could be used for 10 runs.
Published: 2020

48. Multiphase alternated slug flows: conditions to avoid coalescence and characterization of mass transfer between droplets

Author: Laurent Vanoye, Claude de Bellefon, Camille Méhault, Régis Philippe, Laboratoire de Génie des Procédés Catalytiques (LGPC), École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, European Project, Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Coalescence (physics), Gas bubble, Materials science, General Chemical Engineering, Separator (oil production), 02 engineering and technology, General Chemistry, Mechanics, 010402 general chemistry, 021001 nanoscience & nanotechnology, Slug flow, 01 natural sciences, Industrial and Manufacturing Engineering, 0104 chemical sciences, Physics::Fluid Dynamics, [CHIM.GENI]Chemical Sciences/Chemical engineering, Mass transfer, Environmental Chemistry, 0210 nano-technology
Abstract: International audience; Alternated slug flow in capillaries is an efficient way to separate droplets with different compositions for applications in various fields. This paper describes how to solve the main issue, i.e. droplets coalescence, by using a gas bubble as a separator and demonstrates quantitatively how the mass transfer between resulting liquid-(gas-liquid)-liquid flow is negligibly impacted by the gas bubble size distribution generated. Thus residence time of up to 30 min could be achieved avoiding coalescence. The conditions to generate and maintain the alternated flow such as the superficial velocities, viscosities and surface tensions, are provided. The mechanism for mass transfer between droplets is shown to occur mainly through the film at the wall of the capillaries explaining the negligible impact of the gas. Mastering such alternated slug flow opens the door for many applications requiring compartmentation of several reactions. 2
Published: 2020

49. Encapsulation of Adipose-Derived Mesenchymal Stem Cells in Calcium Alginate Maintains Clonogenicity and Enhances their Secretory Profile

Author: Capin, L., Abbassi, N., Lachat, M., Calteau, M., Barratier, C., Mojallal, A., Bourgeois, S., Auxenfans, C., Hôpital Edouard Herriot [CHU - HCL], Hospices Civils de Lyon (HCL), Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Pharmaceutiques et Biologiques [Lyon] (ISPB), Hôpital de la Croix-Rousse [CHU - HCL], Université de Lyon, Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), and CarMeN, laboratoire
Subjects: microparticles, Adult, Pluripotent Stem Cells, adipose-derived mesenchymal stem cells, Alginates, [SDV]Life Sciences [q-bio], Cell Differentiation, Mesenchymal Stem Cells, Middle Aged, Article, lcsh:Chemistry, [SDV] Life Sciences [q-bio], Colony-Forming Units Assay, secretome, lcsh:Biology (General), lcsh:QD1-999, encapsulation, alginate, Cytokines, Humans, cell therapy, lcsh:QH301-705.5, Cells, Cultured, Cell Proliferation
Abstract: Adipose-derived mesenchymal stem cells (ASCs) are well known for their secretory potential, which confers them useful properties in cell therapy. Nevertheless, this therapeutic potential is reduced after transplantation due to their short survival in the human body and their migration property. This study proposes a method to protect cells during and after injection by encapsulation in microparticles of calcium alginate. Besides, the consequences of encapsulation on ASC proliferation, pluripotential, and secretome were studied. Spherical particles with a mean diameter of 500 &micro, m could be obtained in a reproducible manner with a viability of 70% after 16 days in vitro. Moreover, encapsulation did not alter the proliferative properties of ASCs upon return to culture nor their differentiation potential in adipocytes, chondrocytes, and osteocytes. Concerning their secretome, encapsulated ASCs consistently produced greater amounts of interleukin-6 (IL-6), interleukin-8 (IL-8), and vascular endothelial growth factor (VEGF) compared to monolayer cultures. Encapsulation therefore appears to enrich the secretome with transforming growth factor &beta, 1 (TGF-&beta, 1) and macrophage inflammatory protein-1&beta, (MIP-1&beta, ) not detectable in monolayer cultures. Alginate microparticles seem sufficiently porous to allow diffusion of the cytokines of interest. With all these cytokines playing an important role in wound healing, it appears relevant to investigate the impact of using encapsulated ASCs on the wound healing process.
Published: 2020

50. Dynamical modeling of pro- and anti-inflammatory cytokines in the early stage of septic shock

Author: Mélaz Tayakout-Fayolle, Fabienne Venet, Guillaume Monneret, Françoise Couenne, Barbara Browning, François Gueyffier, Virginie Moucadel, J. Tallon, Claire Bordes, Patrice Nony, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Hospices Civils de Lyon (HCL), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), BIOMERIEUX (BIOMERIEUX), and Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: Male, medicine.medical_treatment, 0206 medical engineering, Anti-Inflammatory Agents, Inflammation, 02 engineering and technology, [SPI.AUTO]Engineering Sciences [physics]/Automatic, Sepsis, Adjuvants, Immunologic, dynamic modeling, Genetics, medicine, Humans, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Receptor, Molecular Biology, ComputingMilieux_MISCELLANEOUS, Early sepsis, Septic shock, Chemistry, Interleukin-18, Models, Immunological, General Medicine, IL18 and IL10 cytokines, medicine.disease, Shock, Septic, Interleukin-10, Computational Mathematics, Interleukin 10, Cytokine, medicine.anatomical_structure, Treatment Outcome, Computational Theory and Mathematics, Immunology, Cytokines, Interleukin 18, Female, Bone marrow, medicine.symptom, parameter estimation, 020602 bioinformatics, Research Article
Abstract: A dynamical model of the pathophysiological behaviors of IL18 and IL10 cytokines with their receptors is tested against data for the case of early sepsis. The proposed approach considers the surroundings (organs and bone marrow) and the different subsystems (cells and cyctokines). The interactions between blood cells, cytokines and the surroundings are described via mass balances. Cytokines are adsorbed onto associated receptors at the cell surface. The adsorption is described by the Langmuir model and gives rise to the production of more cytokines and associated receptors inside the cell. The quantities of pro and anti-inflammatory cytokines present in the body are combined to give global information via an inflammation level function which describes the patient's state. Data for parameter estimation comes from the Sepsis 48 H database. Comparisons between patient data and simulations are presented and are in good agreement. For the IL18/IL10 cytokine pair, 5 key parameters have been found. They are linked to pro-inflammatory IL18 cytokine and show that the early sepsis is driven by components of inflammatory character.
Published: 2020

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