A5084994279- Probiotics and Fermented Foods
- Enzyme-mediated dye degradation
- biodegradable polymer synthesis and properties
- Biopolymer Synthesis and Applications
- bioluminescence and chemiluminescence research
- Microbial Metabolism and Applications
- Pharmaceutical and Antibiotic Environmental Impacts
- Genomics and Phylogenetic Studies
- Milk Quality and Mastitis in Dairy Cows
- Environmental Toxicology and Ecotoxicology
- Microplastics and Plastic Pollution
- Protein Structure and Dynamics
- Carbon dioxide utilization in catalysis
- Chromium effects and bioremediation
- Heat shock proteins research
- Graphene and Nanomaterials Applications
- Cholinesterase and Neurodegenerative Diseases
- Parasitic Infections and Diagnostics
- 3D Printing in Biomedical Research
- Marine Ecology and Invasive Species
- Pesticide Exposure and Toxicity
- Marine Biology and Environmental Chemistry
- Microbial Fuel Cells and Bioremediation
- Insect Pheromone Research and Control
- Fermentation and Sensory Analysis
Université de Caen Normandie
1997-2023
Aliments Bioprocédés Toxicologie Environnements
1996-2022
ABSTRACT The genetic diversity of lactococci isolated from raw milk in the Camembert cheese Registered Designation Origin area was studied. Two seasonal samples (winter and summer) were obtained six farms two areas (Bessin Bocage Falaisien) Normandy. All strains analyzed had a Lactococcus lactis subsp. phenotype, whereas randomly amplified polymorphic DNA (RAPD) technique genotypically identified as members L. or cremoris . genotypes confirmed by performing standard PCR with primers...
Growth at low positive temperatures and induced phenotypic resistance to extreme cold temperature (freezing/thawing cycles) of Enterococcus faecalis were investigated. The effect on the specific growth rates was studied; use Arrhenius profile Ratkovsky 'square‐root' model allowed determination 'temperature characteristic' (μ≅ 13 800 cal mol‐1), critical (Tcrit≅ 17.9d̀C) notional minimum (To≅ 3.6d̀C). Preincubation Ent. cells (8–16d̀C) during periods corresponding their generation time...
Transfer of Enterococcus faecalis to a cold temperature (8 degrees C for 4 30 h) led increased expression 11 shock proteins (CSPs). Furthermore, this mesophilic prokaryote synthesized 10 acclimation proteins, five them distinct from CSPs, during continuous growth (4 days) at the same C).
Mutagenicity of acid orange 52 (AO52) and its degradation products by Pseudomonas putida mt-2 was evaluated with the use Salmonella Typhimurium TA102 TA104 without metabolic activation system (S9). No mutagenicity observed in absence S9 presence for biodegradation under shaking conditions, but it increased significantly after static conditions. In addition, ability tested compounds to induce DNA damage vitro strand scission assay. The toxicity generated pure azo dye corresponding...
Thirty-eight Lactococcus strains, isolated from raw milk produced in two dairy areas Normandy, were identified at the phenotypic level. Only lactis strains with phenotype found samples. Most fermented lactose (97%) and showed proteinase activity (76%). Isolates characterized by RAPD technique rRNA gene restriction analysis. More L. genotype first area, while cremoris predominated second area. was more efficient than analysis differentiating between subsp. genotype. For genotype, method gave...
Acid yellow 17 (AY17), a very important commercial azo dye used in the textile industry, was degraded by Pseudomonas putida mt-2 at concentration of up to 200 mg/L. High-performance liquid chromatography analysis biodegradation media revealed presence 4-aminobenzensulfonic acid (4-ABS) derived from AY17 azoreduction, which attests expression an azoreductase this bacterium. This amine identified only medium static incubation, is consistent with its biotransformation under shaken incubation...
Acid violet 7, a sulfonated azo dye was degraded by Pseudomonas putida mt-2 in mineral medium at concentrations up to 200 mg/L. The genotoxicity of AV7 and its biodegradation extracts evaluated using the DNA-strand scission assay. No observed, even with or without exposition UV irradiation, for under shaking conditions, but increased significantly after static conditions. In addition, ability tested compounds reduce human plasma butyrylcholinesterase (BuChE) activity vitro. Genotoxicity...
Randomly amplified polymorphic DNA (RAPD) has been used for the rapid typing of Lactococcus lactis strains isolated from raw milk Camembert region Normandy. It is thought that diversity and perhaps area strain specificity due to climatic geographical factors such wild‐type lactococcal could contribute flavour differences specific features detected same product in different areas. The patterns 58 isolates were analysed by UPGMA dendrograms. At a similarity level 50%, four RAPD clusters...