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1. Surgery in rare bleeding disorders: the prospective MARACHI study

Author

Rousseau, Florence, Guillet, Benoit, Mura, Thibault, Fournel, Alexandra, Volot, Fabienne, Chambost, Hervé, Suchon, Pierre, Frotscher, Brigit, Biron-Andréani, Christine, Marlu, Raphaël, Hezard, Nathalie, Clayssens, Ségolène, Boissier, Elodie, Blanc-Jouvan, Florence, Chamouni, Pierre, Tieulie, Nathalie, Rugeri, Lucia, Borel-Derlon, Annie, de Raucourt, Emmanuelle, Martin-Toutain, Isabelle, Castet, Sabine, Lebreton, Aurélien, Girault, Stéphane, Helley-Russick, Dominique, D’Oiron, Roseline, Schved, Jean-François, and Giansily-Blaizot, Muriel

Published
2023
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2. P1672: OCCUPATIONAL INTEGRATION OF ADULTS WITH SEVERE HAEMOPHILIA (INTHEMO): A STUDY BASED ON THE FRANCECOAG REGISTRY

Author

Ngoc Anh Thu Nguyen, Pascal Auquier, Any Beltran Anzola, Roseline D’oiron, Thierry Lambert, Céline Falaise, Christine Biron, Anne Lienhart, Jenny Goudemand, Antoine Rauch, Bénédicte Wibaut, Sabine Marie Castet, Dominique Desprez, Annie Harroche, Natalie Stieltjes, Annie Borel-Derlon, Marc Trossaërt, Amandine Celli, Benoît Guillet, Sophie Bayart, Marie-Anne Bertrand, Alexandra Fournel, Guillaume Mourey, Valérie Gay, Pierre Chamouni, Emmanuelle DE Raucourt, Birgit Frotscher, Michèle Martin, Mathieu Puyade, Brigitte Tardy, Stéphane Vanderbecken, Fabienne Genre-Volot, Philippe Nguyen, Benoît Polack, Caroline Oudot-Challard, Stéphane Girault, Annelise Voyer, Aurélien Lebreton, Abel Hassoun, Philippe Moreau, Pierre-Simon Rohrlich, Karine Baumstarck, Mohamed Boucekine, Vanessa Milien, Natacha Rosso, Clemence Tabele, Marie Viprey, Nicolas Giraud, Thomas Sannie, Hervé Chambost, and Noémie Resseguier

Subjects
Diseases of the blood and blood-forming organs, RC633-647.5
Published
2023
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5. Modelling of aerobic granular sludge reactors: the importance of hydrodynamic regimes, selective sludge removal and gradients

Author

Nicolas Derlon, Mercedes Garcia Villodres, Róbert Kovács, Antoine Brison, Manuel Layer, Imre Takács, and Eberhard Morgenroth

Subjects
aerobic granular sludge, gradients over reactor height, hydraulic selection, modelling, plug-flow feeding, Environmental technology. Sanitary engineering, TD1-1066
Abstract

Hydraulic selection is a key feature of aerobic granular sludge (AGS) systems but existing aerobic granular sludge (AGS) models neglect those mechanisms: gradients over reactor height (Hreactor), selective removal of slow settling sludge, etc. This study aimed at evaluating to what extent integration of those additional processes into AGS models is needed, i.e., at demonstrating that model predictions (biomass inventory, microbial activities and effluent quality) are affected by such additional model complexity. We therefore developed a new AGS model that includes key features of full-scale AGS systems: fill-draw operation, selective sludge removal, distinct settling models for flocs/granules. We then compared predictions of our model to those of a fully mixed AGS model. Our results demonstrate that hydraulic selection can be predicted with an assembly of four continuous stirred tank reactors in series together with a correction code for plug-flow. Concentration gradients over the reactor height during settling/plug-flow feeding strongly impact the predictions of aerobic granular sludge models in terms of microbial selection, microbial activities and ultimately effluent quality. Hydraulic selection is a key to predict selection of storing microorganisms (phosphorus-accumulating organisms (PAO) and glycogen-accumulating organisms (GAO)) and in turn effluent quality in terms of total phosphorus, and for predicting effluent solid concentration and dynamic during plug-flow feeding. HIGHLIGHTS New model for aerobic granular sludge system developed.; Hydraulic selection of granules (bed stratification, plug flow feeding, etc.) are included.; Gradients over reactor height predicted with a series of four CSTRs plus plug-flow correction code.; Concentration gradients over Hreactor strongly impact predictions in terms of microbial selection, microbial activities and effluent quality.;

Published
2022
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8. Synthetic periphyton as a model system to understand species dynamics in complex microbial freshwater communities

Author

Olga Lamprecht, Bettina Wagner, Nicolas Derlon, and Ahmed Tlili

Subjects
Microbial ecology, QR100-130
Abstract

Abstract Phototrophic biofilms, also known as periphyton, are microbial freshwater communities that drive crucial ecological processes in streams and lakes. Gaining a deep mechanistic understanding of the biological processes occurring in natural periphyton remains challenging due to the high complexity and variability of such communities. To address this challenge, we rationally developed a workflow to construct a synthetic community by co-culturing 26 phototrophic species (i.e., diatoms, green algae, and cyanobacteria) that were inoculated in a successional sequence to create a periphytic biofilm on glass slides. We show that this community is diverse, stable, and highly reproducible in terms of microbial composition, function, and 3D spatial structure of the biofilm. We also demonstrate the ability to monitor microbial dynamics at the single species level during periphyton development and how their abundances are impacted by stressors such as increased temperature and a herbicide, singly and in combination. Overall, such a synthetic periphyton, grown under controlled conditions, can be used as a model system for theory testing through targeted manipulation.

Published
2022
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9. Biofilms in 3D porous media: Delineating the influence of the pore network geometry, flow and mass transfer on biofilm development

Author

Carrel, Maxence, Morales, Verónica L, Beltran, Mario A, Derlon, Nicolas, Kaufmann, Rolf, Morgenroth, Eberhard, and Holzner, Markus

Subjects
Fluid Mechanics and Thermal Engineering, Engineering, Biofilms, Hydrodynamics, Porosity, Rheology, Stress, Mechanical, X-Ray Microtomography, Biofilm, Three-dimensional porous medium, Three-dimensional particle tracking velocimetry, X-ray micro computed tomography, Wall shear stress, Concentration boundary layer thickness, Biofilm morphology, Environmental Engineering
Abstract

This study investigates the functional correspondence between porescale hydrodynamics, mass transfer, pore structure and biofilm morphology during progressive biofilm colonization of a porous medium. Hydrodynamics and the structure of both the porous medium and the biofilm are experimentally measured with 3D particle tracking velocimetry and micro X-ray Computed Tomography, respectively. The analysis focuses on data obtained in a clean porous medium after 36 h of biofilm growth. Registration of the particle tracking and X-ray data sets allows to delineate the interplay between porous medium geometry, hydrodynamic and mass transfer processes on the morphology of the developing biofilm. A local analysis revealed wide distributions of wall shear stresses and concentration boundary layer thicknesses. The spatial distribution of the biofilm patches uncovered that the wall shear stresses controlled the biofilm development. Neither external nor internal mass transfer limitations were noticeable in the considered system, consistent with the excess supply of nutrient and electron acceptors. The wall shear stress remained constant in the vicinity of the biofilm but increased substantially elsewhere.

Published
2018

10. Pore-Scale Hydrodynamics in a Progressively Bioclogged Three-Dimensional Porous Medium: 3-D Particle Tracking Experiments and Stochastic Transport Modeling.

Author

Carrel, M, Morales, VL, Dentz, M, Derlon, N, Morgenroth, E, and Holzner, M

Subjects
3‐D porous medium, 3‐D‐PTV, anomalous transport, bioclogging, biofilm, correlated CTRW, 3-D porous medium, 3-D-PTV, Environmental Engineering, Civil Engineering, Applied Economics, Physical Geography and Environmental Geoscience
Abstract

Biofilms are ubiquitous bacterial communities that grow in various porous media including soils, trickling, and sand filters. In these environments, they play a central role in services ranging from degradation of pollutants to water purification. Biofilms dynamically change the pore structure of the medium through selective clogging of pores, a process known as bioclogging. This affects how solutes are transported and spread through the porous matrix, but the temporal changes to transport behavior during bioclogging are not well understood. To address this uncertainty, we experimentally study the hydrodynamic changes of a transparent 3-D porous medium as it experiences progressive bioclogging. Statistical analyses of the system's hydrodynamics at four time points of bioclogging (0, 24, 36, and 48 h in the exponential growth phase) reveal exponential increases in both average and variance of the flow velocity, as well as its correlation length. Measurements for spreading, as mean-squared displacements, are found to be non-Fickian and more intensely superdiffusive with progressive bioclogging, indicating the formation of preferential flow pathways and stagnation zones. A gamma distribution describes well the Lagrangian velocity distributions and provides parameters that quantify changes to the flow, which evolves from a parallel pore arrangement under unclogged conditions, toward a more serial arrangement with increasing clogging. Exponentially evolving hydrodynamic metrics agree with an exponential bacterial growth phase and are used to parameterize a correlated continuous time random walk model with a stochastic velocity relaxation. The model accurately reproduces transport observations and can be used to resolve transport behavior at intermediate time points within the exponential growth phase considered.

Published
2018

19. Biofilm imaging in porous media by laboratory X-Ray tomography: Combining a non-destructive contrast agent with propagation-based phase-contrast imaging tools.

Author

Carrel, Maxence, Beltran, Mario A, Morales, Verónica L, Derlon, Nicolas, Morgenroth, Eberhard, Kaufmann, Rolf, and Holzner, Markus

Subjects
Biofilms, Barium Sulfate, Water, Ferrous Compounds, Fluorocarbon Polymers, Contrast Media, Imaging, Three-Dimensional, Tomography, X-Ray, Rheology, Porosity, General Science & Technology
Abstract

X-ray tomography is a powerful tool giving access to the morphology of biofilms, in 3D porous media, at the mesoscale. Due to the high water content of biofilms, the attenuation coefficient of biofilms and water are very close, hindering the distinction between biofilms and water without the use of contrast agents. Until now, the use of contrast agents such as barium sulfate, silver-coated micro-particles or 1-chloronaphtalene added to the liquid phase allowed imaging the biofilm 3D morphology. However, these contrast agents are not passive and potentially interact with the biofilm when injected into the sample. Here, we use a natural inorganic compound, namely iron sulfate, as a contrast agent progressively bounded in dilute or colloidal form into the EPS matrix during biofilm growth. By combining a very long source-to-detector distance on a X-ray laboratory source with a Lorentzian filter implemented prior to tomographic reconstruction, we substantially increase the contrast between the biofilm and the surrounding liquid, which allows revealing the 3D biofilm morphology. A comparison of this new method with the method proposed by Davit et al (Davit et al., 2011), which uses barium sulfate as a contrast agent to mark the liquid phase was performed. Quantitative evaluations between the methods revealed substantial differences for the volumetric fractions obtained from both methods. Namely, contrast agent-biofilm interactions (e.g. biofilm detachment) occurring during barium sulfate injection caused a reduction of the biofilm volumetric fraction of more than 50% and displacement of biofilm patches elsewhere in the column. Two key advantages of the newly proposed method are that passive addition of iron sulfate maintains the integrity of the biofilm prior to imaging, and that the biofilm itself is marked by the contrast agent, rather than the liquid phase as in other available methods. The iron sulfate method presented can be applied to understand biofilm development and bioclogging mechanisms in porous materials and the obtained biofilm morphology could be an ideal basis for 3D numerical calculations of hydrodynamic conditions to investigate biofilm-flow coupling.

Published
2017

20. Detection of Gel-Forming Polymers via Calcium Crosslinking, Applied to the Screening of Extracellular Polymeric Substances Extracted from Biological Aggregates

Author

Abdo Bou-Sarkis, Etienne Paul, Elisabeth Girbal-Neuhauser, Nicolas Derlon, and Yolaine Bessiere

Subjects
hydrogels, gelling capacity, calcium crosslinking, aerobic granules, alginate-like exopolymers, extracellular polymeric substances, Science, Chemistry, QD1-999, Inorganic chemistry, QD146-197, General. Including alchemy, QD1-65
Abstract

The valorization of biological aggregates through the extraction of hydrogel-forming polymers can enhance the economics and sustainability of various processes in which bacteria are involved in organic waste transformation, such as wastewater treatment. Achieving these goals requires the development of a method capable of detecting the presence of gel-forming polymers in complex mixtures containing biopolymers that are most often unknown and uncharacterized. A miniaturized screening method capable of detecting gelation via ionic crosslinking using only 1 to 3 mg of the tested samples (commercial molecules or extracellular polymeric substances, EPSs) is proposed. The method consists of calculating a percentage of reactivity (%R) through UV-vis spectra and determining the percentage of gel volume (%Vg) formed after the addition of calcium. Both factors were combined to give a gelling factor (GF), and the test was applied to pure commercial molecules (BSA, DNA, alginate (ALV), and a mixture of them), allowing the classification of the following solutions according to their gel-forming capacity: GF(ALV) > GF(ALV+DNA) > GF(BSA+ALV+DNA) > GF(BSA+ALV) > GF(DNA) > GF(BSA+DNA) > GF(BSA). As a relevant tool for screening hydrogel-forming solutions, the method was applied to the EPS extracted from aerobic granular sludge. The EPS (0.5% w/v) had a GF of 0.16 ± 0.03, equivalent to approximately half of the GF of ALV (0.38 ± 0.02 at 0.5% w/v). The developed test pushes the limits of the existing gel-detection techniques because it allows for quicker, less consuming, and more informative gelation detection through the use of simple methods that do not require sophisticated equipment.

Published
2023
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21. EPIdemiology of Surgery-Associated Acute Kidney Injury (EPIS-AKI): study protocol for a multicentre, observational trial

Author

Melanie Meersch, Mira Küllmar, Carola Wempe, Alexander Zarbock, Ke Peng, Sigismond Lasocki, Thomas Rimmele, Maria Martin, Olivier Desebbe, Michele Rossi, Matthias Heringlake, Christina Massoth, Raphael Weiss, Andreas Höhn, Gael Pradel, Ana Kowark, Ahmed mohamed Ibrahim, Orestis Ioannidis, Andrea Cortegiani, Maxime Leger, Emmanuel Rineau, Pierre-Yves Egreteau, Andrea Russo, Laura Kerschke, Savino Spadaro, Carole Ichai, Vincent Cottenceau, Sebastian Ziemann, Maria Gomez, Julien Nadaud, Olivier Pérus, Philippe Magazzeni, Philippe Montravers, Deniz Karakaya, Christophe Aveline, Alexander Bentley, Tulay Ozkan Seyhan, Jean-François Pittet, Sébastien Ponsonnard, Pierre Garcon, Ana Serrano, Gulay Ok, Pierre Vautier, Jean François Gautier, Sergi Sabaté, Yusuf Tunali, Valérie Cerro, Stephanie Suria, Khaschayar Saadat-Gilani, Hichem Makhloufi, Anis Cherak, Lamine Lakhel Ghanem, Zohier Gouaglia, Dina Nasrine Guadouri, Fayrouz Naouel Hama, Mustafa Kara, Omayma Saadi, Rachida Sakhraoui, Fadila Bourou, Abdelhadi Cherifi, Rahmoune Ghania Sadaoui, Amel Ouyahia, Ilhem Ouahab, Souad Bouaoud, Meriem Abdoun, Anisse Tidjane, Benali Tabeti, Nabil Boudjenan-Serradj, Carlos Jose Pérez Rivera, Paulo Cabrer, Julián Corso, Juan Pablo García, Sharon Idarraga, Christopher Montoya, Rafael Figueroa, Eduar Aldana, María Alejandra Torrado, Zheng-min Ma, Yu-fan Yang, Ya-juan Zhu, Peter Sklienka, Michal Frelich, Vojtech Jarkulis, Pavel Sevcik, Vojtech Vodicka, Mohamed Gamal Elbahnasawy, Shady Elsalhawy, Sara Motawea, Zeinab Othman, Mohamed Sahma, Ahmed Mahmoud Nafea, Nermin Ahmed, Doaa Ali Attia, Moataz Maher Emara, Mohamed Mamdouh Bonna, Mohamed Ahmed Gabr, Amany Ismail Tarbay, Ibrahim Abdelmonaem Abdehaleem, Esraa Elsayed Mohamed, Amr Mahmoud Eldeeb, Ahmed Mohamed Abbas, John Ashraf Magdy, Zyad Hassan Hamed, Hany Mostafa Esmaeil Osman, Mostafa Samy Abbas, Oliver Joannes-Boyau, Nicolas Barraud, Corentin Berthelot, Thibault Camus, Anissa Dahmi, Mylène Defaye, Sébastien Derville, Younes El-Boustani, Elsa Deloge, Hélène Jacob, Simon Monziols, Fred Priem, Jean-Jacques Robin, Vincent Legros, Therry Floch, Salvatore Muccio, Claire Geneve, Marie Lim Legouge, Stéphanie Tao Mauny, Willy Mfam, Léa Pascot, Mireille Chartier, Benjamin Duteurtre, Aidren Le Cousin, Nathalie Begel, Claire-Annissa Chekirine, Vincent Derlon, Elodie Grein, Marie-Annick Lehair, Laurent Magazzeni, Carsten Potter, Catherine Roth, Florence Voivret, Jamil Elmawieh, Annabelle Stoclin, Cédric Cirenei, Gregoire Andrieu, Sven Couloumy, Jeremy Falcone, Marion Fajardy, Arsène Gagneuil, Emeline Girardet, Agnès Mazereeuw, Mélanie Bertel, Simon Bocher, Vanessa Carn, Lenaïg Le Guen, Guillaume Le Loup, Montaine Lefevre, Amanita Diop, Vanessa Jean-Michel, Sylvie Devlieger, Juliette Duthoit, Mohamed El Kadiri, Viviane Cassisa, Charline Masson, Pierre Verrier, Axel Coquerel, Enora Atchade, Charles-Edouard Rochon, Céline Delerue, Vidal Quentin, Vanessa Latry, Nina Queixalos, Thierry Braun, Saad Bouzoubaa, Basile Christ, Audrey Geiger, Joachim Gomille, Vianney Kieffer, Simone Mangeant, Christelle Prochilo, Christian Schmitt, Stefan Skwirba, Hubert Grand, Frédérique Boury, Nicolas Mayeur, Marie Pasquie, Vincent Bruckert, Vincent Arnould, Mona Bonciu, Thibault Chapelle, Luc Facchino, Florence Fagot-Gandet, Andrea Iachim, Elena Mannu, Rémi Plattier, Romain Rozier, Michel Boudinaud, Marie-Hélène Hausermann, My Hue Nguyen, Andersen Ramorasata, Amélie Barreau, Anne-Hélène Boivin, Céline Ravry, Nicolas Mottard, Johanne Beuvelot, Florence Prunier Bossion, Christian Dörr, Thilo Caspar von Groote, Linda Grüßer, Pia Wittig, Timo Brandenburger, Thomas Dimski, Niklas Döhmen, Laura Huthmann, Daniela Kaierle, Claude Pelletier, Manon Schleß, Sebastian Cleophas, Stephanie Haunhorst, Marina Jansen, Alexandra Schmitt, Julia Soisch, Kilian Sturm, Peter Rosenberger, Alexander Bendig, Lena Flohr, Helene Häberle, Pascal Hofmann, Jonathan Kuhle, Nora Michaela Leser, Kathrin Pfister, Stefanie Prohaska, Franziska Sennholz, Lena Stetz, Kathrin Weber, Sebastian Stehr, Stephan Klaus, Marco Sadlo, Matthias Boschin, Christian Sengelhoff, Ulrich Michael Göbel, Jan Gerrit Haaker, Carina-Kristin Göttker, Matthias Gründel, Romina Baumgärtel, Astrid Berggren, Madeleine Gülzow, Lennart Muras, Hauke Paarmann, Serge Thal, Dschamil El-Masri, Eleni Arnaoutoglou, Maria Ntalouka, Paula Stratigopoulou, Anastasia Analytis, Efthymios Mavrommatis, Petros Tzimas, Agathi Karakosta, Danai Pantazi, Antonia Dimakopoulou, Katerina Dimitropoulou, Humam Jalaawiy, Aeshah Anwar, Hashim Talib Hashim, Hogir Imad Rasheed Aldawoody, Giulia Catalisano, Gilia Ingoglia, Mariachiara Ippolito, Silvia De Rosa, Lucia Cattin, Andrea Bianchin, Marisa Barone, Gianluca Paternoster, Salvatore Lucio Cutuli, Liliana Sollazzi, Laura Cascarano, Massimo Antonelli, Paola Aceto, Bruno Romanò, Vincenzo Francesco Tripodi, Rosamaria Scappatura, Maria Cristina Vadalà, Diego Fiume, Maria Teresa Strano, Giulia Oddo, Clemente Santorsola, Bilal Abu Hussain, Adnan Raed Alnaser, Anas Hassouneh Ghassan, Khaled Hasanein, Mohammed Theab, Seokyung Shin, Seungho Jung, Kyuho Lee, Sung Mee Jung, Jongyoon Baek, Muhammed K. Elhadi, Issa Abuzeid, Mohammed Albaraesi, Sarah Aldressi, Wegdan Khalel, Eman Abdulwahed, Akram Abdulhamid Ashur Abujrad, Amer Almaghrabi, Muhand Mohammed Alteleeb, Entisar Ahmed Ali Alshareea, Marwa Isa Biala, Abdulqudus Deeknah, Dooua Ali Gheddim, Reem Ghmagh, Nawras Salih Ali AbuIkhrays, Marwa Sinan, Enas Soula, Sumayyah Ghayth Bahroun, Khawla Derwish, Aya Munir Mohamed, Eman Sayed Younes, Rayet Al Islam Benjouira, Mohamed Aliwa, Najwa Abdullah Altashani, Mohammed Omar Alteb, Ahmed Msherghi, Fatima Alagelli, Sufyan Albarouni, Ahmed Albishti, Sarah Aljamal, Mohamed Alsori, Taha Ekhuja, Suha Elzwai, Mohammed Ghula, Tahani Mustafa, Ahmed Tuwaib, Haifa Zriba, Hamza Mahmoud Agilla, Toky Andriamahefa Rafanomezantsoa, Anne Marie Camilleri Podesta, Denise Mifsud Bonnici, Tiziana Pirotta, Gilberto Adrián Gasca López, Maja Mojsova Mijovska, Tatjana Davitkovska, Aleksandra Gavrilovska, Sanja Lukikj, Marija Vesova, Dina Zafirova, Sarah Amro, Baraa N. F. Hajjaj, Muawia Alkhazendar, Yousuf Barakat, Sewar Abdulaziz Elejla, Ahmed Elhissi, Ahmed Khader, Ali Salem, Rita de Freitas Regufe, André Filipe de Oliveira Eloy, Lisbete Marisa Neto Cordeiro Perdigão, Evgeny Grigoriev, Artem Ivkin, Roman Kornelyuk, Michael Yaroustovsky, Marina Abramyan, Ekaterina Komardina, Nataliya Lesteva, Medina Aybazova, Elmira Kumykova, Svetlana Lesina, Gennady Rybakov, Alexey Shestov, Abdulnaser Ahmad Ahmad Barmou, Bushra Lotfi Altayeb Ahmed, Aisha Mohammad Eliyas, Yousra Emadeldin, Alexander Kaserer, Clara Castellucci, Julian Rössler, Samira Akbas, Andreja Möller Petrun, Irena Gregorcic, Vesna Sok, Roman Čičak, Elizabeth Bárcena, Antonio Guisado, Ismail Wi, Javier Ripollés Melchor, Ángel Becerra-Bolaños, Sergio Cabrera-Doreste, Ancor Domínguez-Arbelo, María Candelaria Delgado-Alonso, Virginia Muiño-Palomar, Aurelio Rodríguez-Pérez, Javier Mata Estévez, Maria Begona Covas Munoz, Juan Mulet Matas, Sara Perez Palao, Maria Dolores Mira Quirós, Alisia Cezara Teslev, Mercedes Garcia Alvarez, Marga Argilaga, María Campos, Albert Bainac, Astrid Batalla, Marta Giné, Gracia Herránz, Ignacio Hinojal, Margarita Logroño Ejea, Noelia de la Rosa Ruiz, María Gastaca Abasolo, Carla Rosario Houhton Acuna, Ibai Iriarte Zaranton, Ana Mendigurenmurua, María José Munoz Sanz, Erika Olea de la Fuente, María Pilar Pérez Vaquero, Ana Soto Iglesias, Ana Ugarte Mieres, Alaitz Urtiaga Urrestizala, Lourdes Ferreira, Félix Lobato, Marta Aguado Sevilla, Andres Erazo, Pere Miró, Diana Vernetta, Berta Castellano Paulis, Anabel Adell Perez, Marta Aseguinolaza Pagola, Elena delVal Peciña, Ainhoa Garmendia Odriozola, Amaia Lopetegi Aizpurua, Olatz Pavón Piquer, Pilar Plou Garcia, Paula Ortega Rezola, Antia Osorio Lopez, Isabel de la Calle Gil, Rosalía Navarro Casado, Peter Adamove, Roser Bayona Domenge, Francho Miguel Blasco Blasco, Adriana Alexandra Rueda Villamizar, Maria Antonia Perelló Llaneras, Jose Ignacio García-Sánchez, Laura Fernandez Téllez, Sara García Zamorano, Natalia Gijón Herreros, Andrea Rodriguez Esteve, Pablo Monedero Rodríguez, Isabel García Trigo, Agustín Alcaraz, Andrea Lara Jiménez, Iñigo Rubio, Nuria García, Raquel Callejas, Angel Manuel Candela Toha, Eli Claros, Pilar Cobeta, Pascual Crespo, Trini Dorado, Elena Elías, Javier Felices, Diego Gil, Nuria Mané, Adolfo Martínez, Lucía Pereira, Alberto Balvis Noemí Samaranch, Carlos Tiscar, Judith VillaHoz, Patricia Galán Menéndez, Elena Cardona, Anna Conesa, Veronica Estepa, Laura Llinares Espí, Yuri Loaiza Aldeán, Susana Manrique, Víctor Morales Ariza, Laura Villarino Villa, Elfayadh Saidahmed Mohamed Amed Suliman, Hytham Hamid, Modather Mohamed Saeed, Orhan Sungur Mukadder, Demet Altun, Nur Canbolat, Müşerref Beril Dinçer, Serap Aktaş Yıldırım, Müzeyyen İyigün, Davut Yapıcı, Levent Özdemir, Aslinur Sagun, Neval Boztug, Yesim Cetintas, Bora Dinc, Emel Gündüz, Hakkı Ünlügenç, Demet Lafli Tunay, Ozgur Komurcu, Özlem Korkmaz Dilmen, Eren Fatma Akcil, Eda Tok Alsina, Özge Hakli, Cengiz Polat, Namigar Turgut, Nurcan Kızılcık, Özge Köner, Öznur Şen, Nurdan Aydin, Burcu Basaran, Emre Sertac Bingul, Kamil Darcin, Semra Ugur, Kemal Tolga Saracoglu, Asli Demir, Özgök Aysegül, Eda Balci, Behic Girgin, Aygun Guler, Ümit Karadeniz, Nihal Özaslan, Yigit Özay Hülya, Namik Ozcan, Aysun Postaci, Mehmet Sahap, Nevriye Salman, Özlem Sağır, Bulent Atik, Murat Bicakcioglu, Hafize Fisun Demir, Ugün Fatih, Nazan Kocaoglu, Hüseyin ilksen Toprak, Duygu Demiröz Aslan, Yusuf Ziya Colak, Mustafa Soner Ozcan, Mehmet Yilmaz, Umran Karaca, Sevtap Hekimoglu Sahin, Özlem Ersoy Karka, Gizem Demir Şenoğlu, Süheyla Erkoç Karadağ, Neslihan Alkis, Volkan Baytaş, Engin Erturk, Ali Akdogan, Ahmet Besir, Dilek Kutanis, Sedat Saylan, Ersagun Tugcugil, Pinar Ayvat, Berrin Günaydın, Beyza Mehri Büyükgebiz, Omer Faruk Boran, Feyza Calisir, Yavuz Orak, Bahar Kuvaki Balkan, Sibel Büyükcoban, Erol Gökel, Sakize Ferim Günenc, Sule Özbilgin, Suna Göre, Selcan Akesen, Seda Cansabuncu, Natalia Momot, Anna Panchenko, and Kristen Rutledge

Subjects
Medicine
Abstract

Introduction More than 300 million surgical procedures are performed each year. Acute kidney injury (AKI) is a common complication after major surgery and is associated with adverse short-term and long-term outcomes. However, there is a large variation in the incidence of reported AKI rates. The establishment of an accurate epidemiology of surgery-associated AKI is important for healthcare policy, quality initiatives, clinical trials, as well as for improving guidelines. The objective of the Epidemiology of Surgery-associated Acute Kidney Injury (EPIS-AKI) trial is to prospectively evaluate the epidemiology of AKI after major surgery using the latest Kidney Disease: Improving Global Outcomes (KDIGO) consensus definition of AKI.Methods and analysis EPIS-AKI is an international prospective, observational, multicentre cohort study including 10 000 patients undergoing major surgery who are subsequently admitted to the ICU or a similar high dependency unit. The primary endpoint is the incidence of AKI within 72 hours after surgery according to the KDIGO criteria. Secondary endpoints include use of renal replacement therapy (RRT), mortality during ICU and hospital stay, length of ICU and hospital stay and major adverse kidney events (combined endpoint consisting of persistent renal dysfunction, RRT and mortality) at day 90. Further, we will evaluate preoperative and intraoperative risk factors affecting the incidence of postoperative AKI. In an add-on analysis, we will assess urinary biomarkers for early detection of AKI.Ethics and dissemination EPIS-AKI has been approved by the leading Ethics Committee of the Medical Council North Rhine-Westphalia, of the Westphalian Wilhelms-University Münster and the corresponding Ethics Committee at each participating site. Results will be disseminated widely and published in peer-reviewed journals, presented at conferences and used to design further AKI-related trials.Trial registration number NCT04165369.

Published
2021
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23. Comparação entre duas técnicas para impactação de marcapasso provisório na sala de urgência

Author

Holanda, Vitor Bruno Texeira de, primary, Holanda, Lucianna Sefarty de, additional, Vieira Junior, Feliciano Mendes, additional, Freitas, Derlon Silva de, additional, Coutinho, Rafael Maia, additional, Coutinho, Fernando Maia, additional, Rodrigues, Emily Saboia Moura, additional, Bezerra, Mayra Ferreira, additional, and Marvão, Márcio César Ribeiro, additional

Published
2023
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24. Management of antiplatelet therapy in patients undergoing elective invasive procedures: Proposals from the French Working Group on perioperative hemostasis (GIHP) and the French Study Group on thrombosis and hemostasis (GFHT). In collaboration with the French Society for Anesthesia and Intensive Care (SFAR)

Author

Albaladejo, P., Belisle, S., Blais, N., Bonhomme, F., Borel-Derlon, A., Borg, J.Y., Bosson, J.-L., Cohen, A., Collet, J.-P., de Maistre, E., Faraoni, D., Fontana, P., Garrigue Huet, D., Godier, A., Gruel, Y., Guay, J., Hardy, J.F., Huet, Y., Ickx, B., Laporte, S., Lasne, D., Levy, J.H., Llau, J., Le Gal, G., Lecompte, T., Lessire, S., Longrois, D., Madi-Jebara, S., Marret, E., Mas, J.L., Mazighi, M., Mismetti, P., Morange, P.E., Motte, S., Mullier, F., Nathan, N., Nguyen, P., Ozier, Y., Pernod, G., Rosencher, N., Roullet, S., Roy, P.M., Samama, C.M., Schlumberger, S., Schved, J.F., Sié, P., Steib, A., Susen, S., van Belle, E., van Der Linden, P., Vincentelli, A., Zufferey, P., Godier, Anne, Fontana, Pierre, Motte, Serge, Steib, Annick, Bonhomme, Fanny, Schlumberger, Sylvie, Lecompte, Thomas, Rosencher, Nadia, Susen, Sophie, Vincentelli, André, Gruel, Yves, Albaladejo, Pierre, and Collet, Jean-Philippe

Published
2018
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25. P1672: OCCUPATIONAL INTEGRATION OF ADULTS WITH SEVERE HAEMOPHILIA (INTHEMO): A STUDY BASED ON THE FRANCECOAG REGISTRY

Author

Nguyen, Ngoc Anh Thu, primary, Auquier, Pascal, additional, Anzola, Any Beltran, additional, D’oiron, Roseline, additional, Lambert, Thierry, additional, Falaise, Céline, additional, Biron, Christine, additional, Lienhart, Anne, additional, Goudemand, Jenny, additional, Rauch, Antoine, additional, Wibaut, Bénédicte, additional, Castet, Sabine Marie, additional, Desprez, Dominique, additional, Harroche, Annie, additional, Stieltjes, Natalie, additional, Borel-Derlon, Annie, additional, Trossaërt, Marc, additional, Celli, Amandine, additional, Guillet, Benoît, additional, Bayart, Sophie, additional, Bertrand, Marie-Anne, additional, Fournel, Alexandra, additional, Mourey, Guillaume, additional, Gay, Valérie, additional, Chamouni, Pierre, additional, Raucourt, Emmanuelle DE, additional, Frotscher, Birgit, additional, Martin, Michèle, additional, Puyade, Mathieu, additional, Tardy, Brigitte, additional, Vanderbecken, Stéphane, additional, Genre-Volot, Fabienne, additional, Nguyen, Philippe, additional, Polack, Benoît, additional, Oudot-Challard, Caroline, additional, Girault, Stéphane, additional, Voyer, Annelise, additional, Lebreton, Aurélien, additional, Hassoun, Abel, additional, Moreau, Philippe, additional, Rohrlich, Pierre-Simon, additional, Baumstarck, Karine, additional, Boucekine, Mohamed, additional, Milien, Vanessa, additional, Rosso, Natacha, additional, Tabele, Clemence, additional, Viprey, Marie, additional, Giraud, Nicolas, additional, Sannie, Thomas, additional, Chambost, Hervé, additional, and Resseguier, Noémie, additional

Published
2023
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27. Role of factor VIII-binding capacity of endogenous von Willebrand factor in the development of factor VIII inhibitors in patients with severe hemophilia A

Author

Yohann Repessé, Catherine Costa, Roberta Palla, Elika Farrokhi Moshai, Annie Borel-Derlon, Roseline D’Oiron, Chantal Rothschild, Amal El-Beshlawy, Mohsen Elalfy, Vijay Ramanan, Peyman Eshghi, Johannes Oldenburg, Anna Pavlova, Frits R Rosendaal, Flora Peyvandi, Srinivas V. Kaveri, and Sébastien Lacroix-Desmazes

Subjects
Diseases of the blood and blood-forming organs, RC633-647.5
Published
2019
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28. Source Community and Assembly Processes Affect the Efficiency of Microbial Microcystin Degradation on Drinking Water Filtration Membranes

Author

Marisa O. D. Silva, Peter Desmond, Nicolas Derlon, Eberhard Morgenroth, and Jakob Pernthaler

Subjects
biofilm, microcystin, drinking water, membrane filtration, microbial communities, network analysis, Microbiology, QR1-502
Abstract

Microbial biofilms in gravity-driven membrane (GDM) filtration systems can efficiently degrade the cyanotoxin microcystin (MC), but it is unclear if this function depends on the presence of MC-producing cyanobacteria in the source water habitat. We assessed the removal of MC from added Microcystis aeruginosa biomass in GDMs fed with water from a lake with regular blooms of toxic cyanobacteria (ExpL) or from a stream without such background (ExpS). While initial MC removal was exclusively due to abiotic processes, significantly higher biological MC removal was observed in ExpL. By contrast, there was no difference in MC degradation capacity between lake and stream bacteria in separately conducted liquid enrichments on pure MC. Co-occurrence network analysis revealed a pronounced modularity of the biofilm communities, with a clear hierarchic distinction according to feed water origin and treatment type. Genotypes in the network modules associated with ExpS had significantly more links to each other, indicating that these biofilms had assembled from a more coherent source community. In turn, signals for stochastic community assembly were stronger in ExpL biofilms. We propose that the less “tightly knit” ExpL biofilm assemblages allowed for the better establishment of facultatively MC degrading bacteria, and thus for higher overall functional efficiency.

Published
2019
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29. The carbon footprint of ambulatory gastrointestinal endoscopy

Author

Joel Lacroute, Juliette MARCANTONI, Stephane PETITOT, Julien WEBER, Patrick LEVY, Bastien DIRRENBERGER, Irina Tchoumak, Mathilde BARON, Stéphanie GIBERT, Sandrine MARGUERITE, Anne DERLON, Olivier Gronier, and Jerome Huppertz

Subjects
Gastroenterology
Abstract

Background and study aims Endoscopy is considered the third highest generator of waste within healthcare. This is of public importance as approximately 18 million endoscopy procedures are performed yearly in the United States and 2 million in France. However, a precise measure of the carbon footprint of gastrointestinal endoscopy (GIE) is lacking. Methods This retrospective study for 2021 was conducted in an ambulatory GIE center in France where 8’524 procedures were performed on 6’070 patients. The annual carbon footprint (CF) of GIE was calculated using “Bilan Carbone” of the French Environmental and Energy Management Agency. This multi-criteria method accounts for direct and indirect greenhouse gas (GHG) emissions from energy consumption (gas and electricity), medical gases, medical and non-medical equipment, consumables, freight, travel and waste. Results Greenhouse gas emissions in 2021 are estimated at 241 tonnes CO2 equivalents (CO2e) at the center, giving a carbon footprint for one GIE procedure at 28·4 kg CO2e. The main greenhouse gas emission, 45 % of total, is from travel by patients and professionals at the center. Other emission sources, in rank order, are medical and non-medical equipment (32%), energy consumption (12%), consumables (7%), waste (3%), freight (0·4%) and medical gases (0·005%). Conclusions This is the first multi-criteria analysis assessing carbon footprint of gastrointestinal endoscopy. It highlights that travel, medical equipment and energy are major sources of this footprint, waste being a minor contributor. This study provides an opportunity to raise awareness among gastroenterologists of the carbon footprint of GIE procedures.

Published
2023
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32. Zero incidence of factor VIII inhibitors and successful haemostatic response in previously factor VIII‐treated patients with haemophilia A switching to turoctocog alfa in a noninterventional study

Author

Roger E. G. Schutgens, Annie Borel Derlon, Sohan Dey, Barbara Faganel Kotnik, Olga Katsarou, Carmen Escuriola Ettingshausen, Irina Matytsina, Paula F. Ypma, and Rudolf Schwarz

Subjects
Male, medicine.medical_specialty, Haemophilia A, Hemophilia A, Haemophilia, Bethesda unit, Hemostatics, hemic and lymphatic diseases, Internal medicine, medicine, Clinical endpoint, Humans, Prospective Studies, Dosing, Genetics (clinical), Factor VIII, Drug Substitution, business.industry, Incidence, Incidence (epidemiology), Hematology, General Medicine, Turoctocog alfa, medicine.disease, Confidence interval, business
Abstract

Introduction Turoctocog alfa (NovoEight® ) is a B-domain-truncated recombinant factor VIII (FVIII) approved for patients with haemophilia A. Aim To investigate the long-term safety and efficacy of turoctocog alfa in routine clinical practice. Methods Guardian 5 was a prospective, multinational, non-interventional, post-authorisation safety study. Male previously treated patients (> 150 exposure days [EDs]) of any age with severe/moderately severe haemophilia A (FVIII ≤ 2%) and a negative inhibitor test prior to first dosing (independent of FVIII-inhibitor history) were included to receive prophylaxis or on-demand treatment. The primary endpoint was the proportion of patients developing FVIII inhibitors (≥.6 Bethesda Units [BU]) after baseline visit, measured as per routine practice of each study site during clinic visits. Secondary endpoints included haemostatic effect, annualised bleeding rate (ABR), and adverse reactions assessment. The study concluded when 50 patients reached 100 EDs/patient minimum. Results Seventy patients were screened and 68 exposed to turoctocog alfa; 63 (92.6%) were on prophylaxis and five received on-demand treatment. Six (8.8%) patients reported a history of positive inhibitors. During the study, patients were exposed to turoctocog alfa for a mean (standard deviation) of 131.9 (99.0) days/patient. Fifty-five of 58 patients who completed the study were tested for FVIII inhibitors; no positive tests were reported. Overall success rate of turoctocog alfa for treatment of bleeds was 87.3%. Among patients receiving prophylaxis, median (range) ABR was 1.97 (.0-25.5) bleeds/year; estimated ABR (negative binomial model) was 3.65 (95% confidence interval: 2.53-5.25). Conclusion Turoctocog alfa was safe and efficacious for haemophilia A treatment in routine clinical practice.

Published
2021
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33. Selective elimination of enterovirus genotypes by activated sludge and chlorination

Author

Odile Larivé, Shotaro Torii, Nicolas Derlon, and Tamar Kohn

Subjects
Environmental Engineering, Water Science and Technology
Abstract

Enteroviruses, which are commonly circulating viruses shed in the stool, are released into the sewage system and only partially removed or inactivated, resulting in the discharge of infectious enteroviruses into the environment. Activated sludge and chlorination remove or inactivate enterovirus genotypes to different extents, and thus have the potential to shape the population that will be discharged. The goal of this study was to evaluate how activated sludge and chlorination treatment shape an enterovirus population at the genotype level, using a population of eight genotypes commonly found in sewage: CVA9, CVB1, CVB2, CVB3, CVB4, CVB5, E25, E30. Our results show that the extent of inactivation varied among genotypes, but also across sludge samples. We find that the effluent of activated sludge systems will be depleted in CVA9, CVB1 and CVB2 while E25 together with CVB3, CVB4 and CVB5 will be prevalent. Furthermore, we found that microbial inactivation was the main mechanism of infectivity loss in the activated sludge, while adsorption to the sludge flocs was not significant. During effluent chlorination, we also observed that CVB5, CVB3 and to a lesser extent E25 were less susceptible to chlorination while E30 was readily inactivated, and activated sludge-derived EPS provided further protection against chlorination. This study contributes to a better understanding of the variability of sewage treatment efficacy against different enteroviruses.

Published
2023
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35. Simultaneous Mapping of Vasculature, Hypoxia, and Proliferation Using Dynamic Susceptibility Contrast MRI, 18F-FMISO PET, and 18F-FLT PET in Relation to Contrast Enhancement in Newly Diagnosed Glioblastoma

Author

Samuel Valable, Solène Collet, Jean-Marc Constans, Mathieu Hatt, Jean-Sébastien Guillamo, Cécile Perrio, Ararat Chakhoyan, Dimitris Visvikis, Emmanuèle Lechapt-Zalcman, Stéphane Guillouet, J M Derlon, Myriam Bernaudin, and David Hassanein Berro

Subjects
Contrast enhancement, business.industry, media_common.quotation_subject, Newly diagnosed, 18f fmiso, Hypoxia (medical), medicine.disease, 030218 nuclear medicine & medical imaging, Peripheral, 03 medical and health sciences, 0302 clinical medicine, 030220 oncology & carcinogenesis, medicine, Contrast (vision), Radiology, Nuclear Medicine and imaging, medicine.symptom, business, Nuclear medicine, Dynamic susceptibility, media_common, Glioblastoma
Abstract

Conventional MRI plays a key role in the management of patients with high grade glioma but multiparametric MRI and PET tracers could provide further information to better characterize the tumor metabolism and heterogeneity, by identifying the regions having a high risk of recurrence. In this study, we focused on the proliferation, hypervascularization and hypoxia, all factors considered as factors of poor prognosis. They were assessed by measuring the uptake of 18F-FLT, the rCBV maps and the uptake of 18F-FMISO, respectively. For each modality, the volumes and high uptake sub-volumes (hotspots) were semi-automatically segmented and compared to contrast enhancement (CE) volume on T1w-Gd images, commonly used in the management of patient with glioblastoma. Methods: DSC MRI (31 patients), 18F-FLT PET (20 patients) and/or 18F-FMISO PET (20 patients), for a total of 31 patients, were performed on pre-operative glioblastoma patients. Volumes and hotspots were segmented on SUV maps for 18F-FLT (using FLAB) and 18F-FMISO (using mean contralateral + 3.3 SD) PET and on rCBV maps (using mean contralateral + 1.96 SD) for DSC MRI and overlaid on T1w-Gd images. For each modality, the percentage of peripheral volumes and the peripheral hotspot outside the CE volume were calculated. Results: All tumors showed high proliferation, hypervascularization and hypoxic regions. Images also showed pronounced heterogeneity of both tracers uptake and rCBV maps, within each individual case. Overlaid volumes on T1w-Gd images showed that some proliferative, hypervascularization and hypoxic regions extended beyond the CE volume but with marked differences between patients. The ranges of peripheral volume outside the CE volume were [1.6% - 155.5 %], [1.5% - 89.5%] and [3.1% - 78.0%] for 18F-FLT, rCBV and 18F-FMISO respectively. All patients had hyperproliferative hotspots outside CE volume, whereas hotspots of hypervasculature and hypoxia were mainly detected within the enhancing region. Conclusion: The spatial analysis of the multiparametric maps with the segmented volumes and hotspots provides valuable information to optimize the management and treatment of the patients with glioblastoma.

Published
2021
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39. Biofilm imaging in porous media by laboratory X-Ray tomography: Combining a non-destructive contrast agent with propagation-based phase-contrast imaging tools.

Author

Maxence Carrel, Mario A Beltran, Verónica L Morales, Nicolas Derlon, Eberhard Morgenroth, Rolf Kaufmann, and Markus Holzner

Subjects
Medicine, Science
Abstract

X-ray tomography is a powerful tool giving access to the morphology of biofilms, in 3D porous media, at the mesoscale. Due to the high water content of biofilms, the attenuation coefficient of biofilms and water are very close, hindering the distinction between biofilms and water without the use of contrast agents. Until now, the use of contrast agents such as barium sulfate, silver-coated micro-particles or 1-chloronaphtalene added to the liquid phase allowed imaging the biofilm 3D morphology. However, these contrast agents are not passive and potentially interact with the biofilm when injected into the sample. Here, we use a natural inorganic compound, namely iron sulfate, as a contrast agent progressively bounded in dilute or colloidal form into the EPS matrix during biofilm growth. By combining a very long source-to-detector distance on a X-ray laboratory source with a Lorentzian filter implemented prior to tomographic reconstruction, we substantially increase the contrast between the biofilm and the surrounding liquid, which allows revealing the 3D biofilm morphology. A comparison of this new method with the method proposed by Davit et al (Davit et al., 2011), which uses barium sulfate as a contrast agent to mark the liquid phase was performed. Quantitative evaluations between the methods revealed substantial differences for the volumetric fractions obtained from both methods. Namely, contrast agent-biofilm interactions (e.g. biofilm detachment) occurring during barium sulfate injection caused a reduction of the biofilm volumetric fraction of more than 50% and displacement of biofilm patches elsewhere in the column. Two key advantages of the newly proposed method are that passive addition of iron sulfate maintains the integrity of the biofilm prior to imaging, and that the biofilm itself is marked by the contrast agent, rather than the liquid phase as in other available methods. The iron sulfate method presented can be applied to understand biofilm development and bioclogging mechanisms in porous materials and the obtained biofilm morphology could be an ideal basis for 3D numerical calculations of hydrodynamic conditions to investigate biofilm-flow coupling.

Published
2017
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42. La transition énergétique : un enjeu de formation

Author

Muryel Derlon and Martina Mayer

Abstract

La transition énergétique, concept-clé dans la lutte contre la crise climatique, est devenue l’un des grands sujets de notre époque. Dans ce contexte, exclure le développement durable de la formation universitaire de futurs traducteurs paraît impensable aux auteures de cette contribution. Dans notre fonction d’enseignantes-chercheuses au sein de l’Institut de traductologie (INTRAWI) de l’université d’Innsbruck, nous avons donc élaboré un programme pour deux cours de traduction, thème et versi...

Published
2020
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43. The capture technology matters: Composition of municipal wastewater solids drives complexity of microbial community structure and volatile fatty acid profile during anaerobic fermentation

Author

Brison, Antoine, Rossi, Pierre, Gelb, Arnaud, and Derlon, Nicolas

Subjects
Environmental Engineering, Sewage, Microbiota, Thermal-alkaline pre-treatment, High-rate activated sludge, Hydrogen-Ion Concentration, Wastewater, Fatty Acids, Volatile, Anaerobic microbial community structure, Pollution, Fermentation of municipal wastewater solids, Bioreactors, Micro-sieve, Volatile fatty acids, Fermentation, Environmental Chemistry, Anaerobiosis, Waste Management and Disposal
Abstract

The production of volatile fatty acids (VFAs) represents a relevant option to valorize municipal wastewater (MWW). In this context, different capture technologies can be used to recover organic carbon from wastewater in form of solids, while pre-treatment of those solids has the potential to increase VFA production during subsequent fermentation. Our study investigates how VFA composition produced by fermentation is influenced (i) by the choice of the capture technology, as well as (ii) by the use of thermal alkaline pre-treatment (TAP). Therefore, the fermentation of solids originating from a primary settler, a micro-sieve, and a high-rate activated sludge (HRAS) system was investigated in continuous lab-scale fermenters, with and without TAP. Our study demonstrates that the capture technology strongly influences the composition of the produced solids, which in turn drives the complexity of the fermenter's microbial community and ultimately, of the VFA composition. Solids captured with the primary settler or micro-sieve consisted primarily of polysaccharides, and led to the establishment of a microbial community specialized in the degradation of complex carbohydrates. The produced VFA composition was relatively simple, with acetate and propionate accounting for >90% of the VFAs. In contrast, the HRAS system produced biomass-rich solids associated with higher protein contents. The microbial community which then developed in the fermenter was therefore more diversified and capable of converting a wider range of substrates (polysaccharides, proteins, amino acids). Ultimately, the produced VFA composition was more complex, with equal fractions of isoacids and propionate (both ~20%), while acetate remained the dominant acid (~50%). Finally, TAP did not significantly modify the VFA composition while increasing VFA yields on HRAS and sieved material by 35% and 20%, respectively. Overall, we demonstrated that the selection of the technology used to capture organic substrates from MWW governs the composition of the VFA cocktail, ultimately with implications for their further utilization., Science of The Total Environment, 815, ISSN:0048-9697, ISSN:1879-1026

Published
2022

46. Zero incidence of factor VIII inhibitors and successful haemostatic response in previously factor VIII-treated patients with haemophilia A switching to turoctocog alfa in a noninterventional study

Author

Poli Van Creveldkliniek Medisch, Child Health, Circulatory Health, Infection & Immunity, Escuriola Ettingshausen, Carmen, Katsarou, Olga, Kotnik, Barbara Faganel, Borel Derlon, Annie, Schwarz, Rudolf, Ypma, Paula F., Matytsina, Irina, Dey, Sohan, Schutgens, Roger E.G., Poli Van Creveldkliniek Medisch, Child Health, Circulatory Health, Infection & Immunity, Escuriola Ettingshausen, Carmen, Katsarou, Olga, Kotnik, Barbara Faganel, Borel Derlon, Annie, Schwarz, Rudolf, Ypma, Paula F., Matytsina, Irina, Dey, Sohan, and Schutgens, Roger E.G.

Published
2022

49. Influent carbon to phosphorus ratio drives the selection of PHA-storing organisms in a single CSTR

Author

Antoine Brison, Pierre Rossi, and Nicolas Derlon

Subjects
Biomass PHA content, Dual carbon and phosphorus limitation, Ecological Modeling, Cellular phosphorus requirements, Polyhydroxyalkanoates (PHAs), Growth conditions, Long-term selection, Pollution, Waste Management and Disposal, Water Science and Technology
Abstract

Enriching a biomass with a high fraction of polyhydroxyalkanoate-storing organisms (PHA-storers) represents an essential step in the production of PHAs (bioplastics) from municipal wastewater using mixed microbial cultures. A major challenge is however to create selective growth conditions that are favourable to PHA-storers. Our study thus investigates to what extent the influent COD to phosphorus (COD:P) ratio can be used as a tool for the robust selection of PHA-storers in a single continuous-flow stirred-tank reactor (CSTR). Therefore, we operated five CSTRs in parallel, fed with synthetic wastewater (50% acetate - 50% propionate) with different COD:P ratios (200−1000 gCOD gP−1), and performed a detailed analysis of the microbial communities over long-term (30−70 solid retention times). Our study demonstrates that efficient and robust selection of PHA-storers can be achieved in a single CSTR at high influent COD:P ratios. The selective advantage for PHA-storers increases with the influent COD:P ratio, but only if growth conditions remain limited by both C-substrate and P. In contrast, selection performance deteriorates when COD:P ratios are too high and growth conditions are limited by P only. At an optimal COD:P ratio of 800 gCOD gP−1, a stable microbial community consisting of >90% PHA-storers and dominated by Pannonibacter sp. was selected in the long-term. Finally, our results suggest that high COD:P ratios provide a selective advantage to microorganisms with low cellular P requirements, explaining why different PHA-storers (i.e., Xanthobacter sp. vs. Pannonibacter sp.) were selected depending on the influent COD:P ratio (i.e., 200 vs. 800 gCOD gP−1). Overall, our results provide relevant insights for the development of a new approach for selecting PHA-storers, based on the use of a single CSTR and control of the influent COD:P ratio., Water Research X, 16, ISSN:2589-9147

Published
2022
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50. Low maintenance gravity-driven membrane filtration using hollow fibers: Effect of reducing space for biofilm growth and control strategies on permeate flux

Author

Deborah Stoffel, Elvira Rigo, Nicolas Derlon, Christian Staaks, Martin Heijnen, Eberhard Morgenroth, and Céline Jacquin

Subjects
Environmental Engineering, Available space for biofilm growth, Ultrafiltration, Membranes, Artificial, Backwash, Pollution, Water Purification, Gravity-driven membrane filtration, Hollow fiber membranes, Renal Dialysis, Biofilms, Environmental Chemistry, Waste Management and Disposal, Filtration
Abstract

The implementation of centralized drinking water treatment systems necessitates lower operational costs and improved biopolymer removal during ultrafiltration (UF), which can be afforded by gravity-driven membrane (GDM) filtration. However, prior to implementing GDM filtration in centralized systems, biofilm growth in compacted membrane configurations, such as inside-out hollow fiber (HF), and its impact on permeate flux need to be investigated. To this end, we operated modules with distinct limits on available space for biofilm growth: (1) outside-in 1.5 mm 7-capillary HF (non-limited), (2) inside-out 1.5 mm 7-capillary HF (limited), and (3) inside-out 0.9 mm 7-capillary HF (very limited). Here, we observed that the lower the space available for biofilm growth, the lower the permeate flux. To improve GDM performance with inside-out HF, we applied daily shear stress to the biofilm surface with forward flush (FF) or combined relaxation and forward flush (R+FF). We showed that applying shear stress to the biofilm surface was insufficient for controlling flux loss due to low available space for biofilm growth. At the experimental endpoint, we backwashed with a stepwise transmembrane pressure (TMP) increase or a single TMP on all inside-out HF modules, which removed the biofilm from its base. Afterwards, higher fluxes were yielded. We also showed that all modules exhibited a gradual increase in biopolymer removal followed by stabilization between 70 and 90%. Additionally, control of biofilm growth with surface shear stress did not affect biopolymer removal. In summary, the implementation of inside-out HF with GDM filtration is challenged by low available space for biofilm growth, but may be remedied with a regular backwash to remove biofilm from its base. We showed that a wider range of GDM applications are available; making GDM potentially compatible with implementation in centralized systems, if space limitation is taken into consideration for operation optimization., Science of The Total Environment, 811, ISSN:0048-9697, ISSN:1879-1026

Published
2022
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