A5022987614- Indoor Air Quality and Microbial Exposure
- Pancreatic function and diabetes
- Dermatology and Skin Diseases
- Bacterial biofilms and quorum sensing
- Analytical Chemistry and Chromatography
- Microbial bioremediation and biosurfactants
- Microbial Metabolic Engineering and Bioproduction
- Advanced Chemical Sensor Technologies
- Microbial Community Ecology and Physiology
- Probiotics and Fermented Foods
- Air Quality and Health Impacts
- Advanced Control Systems Optimization
- Microencapsulation and Drying Processes
- Clostridium difficile and Clostridium perfringens research
- Plant-Microbe Interactions and Immunity
- Plant Pathogenic Bacteria Studies
- Polyamine Metabolism and Applications
- Genomics and Phylogenetic Studies
- Advanced Drug Delivery Systems
- Microbial Fuel Cells and Bioremediation
- Bee Products Chemical Analysis
- Climate Change and Health Impacts
- Microfluidic and Bio-sensing Technologies
- Skin Protection and Aging
- Bacterial Genetics and Biotechnology
Université de Rouen Normandie
1997-2022
Normandie Université
2009-2020
McGill University
1993-1995
Université de Lorraine
1989-1992
Centre National de la Recherche Scientifique
1989-1992
Laboratoire de Génie Chimique
1992
Lactic acid bacteria were microencapsulated within cross-linked chitosan membranes formed by emulsification/interfacial polymerization. The technique was modified and optimized to provide biocompatible conditions during encapsulation involving the use of mineral oils as continuous phase membrane material. Chitosan with hexamethylene diisocyanate or glutaraldehyde resulted in strong membranes, a narrow size distribution about mean diameter 150 mum. Cell viability activity demonstrated...
Abstract A mild chitosan/calcium alginate encapsulation process, as applied to of hemoglobin, was investigated. The first procedure consisted adding dropwise a hemoglobin‐containing sodium mixture in chitosan solution, then hardening the interior capsules thus formed, presence CaCl 2 . In second method, droplets were directly pulled off chitosan–CaCl mixture. Both procedures led beads containing high concentration entrapped hemoglobin more than 90% initial (150 g/L) retained inside provided...
Lactococcus lactis ssp. cremoris was entrapped within a Ca-alginate matrix, and an in situ spectrophotometric method for monitoring cell population calcium alginate beads described. The intracapsular can be estimated by measuring the optical density of containing cells, using cell-free as reference, or absorbance liquified bead suspension. Alginate beads, coated with chitosan type I, II, I II mixtures, were examined release. Lower viscosity (type I) coatings reduced release factor 100...
Abstract Lactococci were encapsulated within gelatin membranes cross‐linked with toluene‐2,4‐diisocyanate at an oil/water interface. Reagent toxicity was avoided by use of vegetable or silicone oil as a dispersant, and minimizing cell exposure to the water insoluble cross‐linking agent during membrane formulation. Growth cells microcapsules observed fermentation acidification activity increased subsequent reuse. A microencapsulated density 10 9 cfu cm −3 resulted in milk pH 5.5 2.8 h,...
Abstract Background Pseudomonas fluorescens is present in low number the intestinal lumen and has been proposed to play a role Crohn's disease (CD). Indeed, highly specific antigen, I2, detected CD patients correlated severity of disease. We aimed determine whether P. was able adhere human epithelial cells (IECs), induce cytotoxicity activate proinflammatory response. Results Behaviour clinical strain MFN1032 compared that psychrotrophic MF37 opportunistic pathogen aeruginosa PAO1. Both...
Rhodococcus erythropolis is an environmental Gram-positive Actinobacterium with a versatile metabolism involved in various bioconversions and degradations. Rhodococci are best known for their great potential numerous decontamination industrial processes. However, they can also prevent plant disease by disrupting quorum sensing-based communication of Gram-negative soft-rot bacteria, degrading N-acyl-homoserine lactone signaling molecules. Such biocontrol activity results partly from the...
The skin constitutes with its microbiota the first line of body defense against exogenous stress including air pollution. Especially in urban or sub-urban areas, it is continuously exposed to many environmental pollutants gaseous nitrogen dioxide (gNO 2 ). Nowadays, well established that pollution has major effects on human skin, inducing various diseases often associated microbial dysbiosis. However, very few known about impact microbiota. In this study, a new approach was adopted, by...
To decontaminate dredged harbor sediments by bioremediation or electromigration processes, adding biosurfactants could enhance the bioavailability mobility of contaminants in an aqueous phase. Pure amphisin from Pseudomonas fluorescens DSS73 displays increased effectiveness releasing polycyclic aromatic hydrocarbons (PAHs) strongly adsorbed to when compared a synthetic anionic surfactant. Amphisin production bacteria natural environment was also considered. DSS73's growth is weakened three...
Bacteria can bind on clothes, but the impacts of textiles leachables cutaneous bacteria remain unknown. Here, we studied for first time effects cotton and flax obtained through classical soft ecological agriculture representatives S. aureus epidermidis microbiota. Crude showed an inhibitory potential bacterial lawns whereas had no effect. Textile fiber were produced in culture media, these extracts tested epidermidis. Bacterial growth was not impacted, investigation by crystal violet...
The present study deals with the influence of growth temperature on biosurfactant production and adhesion process in psychrotrophic species Pseudomonas fluorescens.We studied a strain panel composed nine wild cyclolipopeptide (CLPs) producers by two mutants.Where was characterized at either 8°C or 17°C, highlighted hemolytic tensiometric methods.Their ionic charge evaluated double diffusion test their identification made as amphisin-or viscosin-or viscosinamide-like biosurfactants Reverse...
Low environmental air quality is a significant cause of mortality and morbidity this question now emerging as main concern governmental authorities. Airborne pollution results from the combination chemicals, fine particles, micro-organisms quantitatively or qualitatively dangerous for health environment. Increasing regulations limitations outdoor have been decreed in regards to chemicals particles contrary micro-organisms. Indeed, pertinent reliable tests evaluate biohazard are scarce. In...
Staphylococcus spp. and Pseudomonas are widely distributed bacteria in the environment found association with animals humans. Here, we present draft genome sequence data of healthy human skin commensal strains aureus MFP03, epidermidis MFP04, capitis MFP08, fluorescens MFP05.