Search results for "RICH"

Ecologie de souches d'Escherichia coli productrices de béta lactamases à spectre élargi (BLSE) de type CTX-M dans les systèmes d'épuration des eaux u…

2011

Master 2 R de Biochimie, Biologie Cellulaire et Moléculaire; Master

Détection et caractérisation moléculaire de souches d’Escherichia coli porteuses de gènes de résistance CTX-M (betalactamases à spectre élargi ou BLS…

2010

National audience

Fortifier l'alimentation des personnes âgées : encore trop peu de stratégies efficaces pour lutter contre la dénutrition

2022

Distribution of the weed flora in a small agricultural landscape

2023

Impact of food fortification on nutritional outcomes and satisfaction in the older people: A systematic literature review protocol

2021

Malnutrition, a recognized pathology in the older adults, corresponds to an imbalance of nutritional intake compared to the body's needs. To treat this disease, several alternatives can be used, among which there is food fortification. Food-based fortification (also known as dietary enrichment) corresponds to the addition of conventional foods or high calorie and/or nutrients ingredients in the person's meals and dishes. It is a strategy used to treat moderate and severe malnutrition but can be employed as prevention. In this context, the purpose of the present study was to conduct a systematic review of all studies related to the nutritional and satisfaction issue of fortified foods dedica…

Detection of Escherichia coli strains producing cytotoxic necrotizing factor type two (CNF2) by enzyme-linked immunosorbent assay

1994

Sheep and rabbit antisera were produced against lysates of E. coli strain 711 (pVir). This K-12 strain carries the Vir plasmid which codes for Cytotoxic Necrotizing Factor type 2 (CNF2). Immunoglobulin G (IgG) fractions of both immune sera were subsequently purified by a two-step precipitation method. To increase the specificity for CNF2, the sheep IgG preparation was extensively adsorbed against both a sonicated extract of isogenic K-12 strain 711 and intact phenol-treated cells of vaccine strain 711 (pVir). An enzyme-linked immunosorbent assay (ELISA) was developed to detect clinical isolates of E. coli producing CNF2, using the final preparations of rabbit and sheep IgG in a double sandw…

Harnessing the biodiversity value of Central and Eastern European farmland

2015

A large proportion of European biodiversity today depends on habitat provided by low‐intensity farming practices, yet this resource is declining as European agriculture intensifies. Within the European Union, particularly the central and eastern new member states have retained relatively large areas of species‐rich farmland, but despite increased investment in nature conservation here in recent years, farmland biodiversity trends appear to be worsening. Although the high biodiversity value of Central and Eastern European farmland has long been reported, the amount of research in the international literature focused on farmland biodiversity in this region remains comparatively ti…

Enteropathogenic Escherichia coli O103 from rabbit elicits actin stress fibers and focal adhesions in HeLa epithelial cells, cytopathic effects that …

1997

Escherichia coli O103, a major agent of weaned-rabbit diarrhea in Western Europe, was previously shown to produce diarrhea and attaching-and-effacing intestinal lesions in experimentally infected rabbits and to possess a homolog of the eaeA gene of enteropathogenic E. coli (EPEC). In the present study, we have shown that although negative in the fluorescent-actin staining test on HeLa cells, prototype rabbit E. coli O103 strain B10 was able to induce an original cytopathic effect (CPE) in the same interaction model. This CPE was characterized by a generalized reorganization of the actin cytoskeleton and the formation of focal adhesions on the entire surface of the target cells. These effect…

Cyclopropane Fatty Acid Synthase from Oenococcus oeni: Expression in Lactococcus lactis subsp. Cremoris and Biochemical Characterization

2015

Bacterial cyclopropane fatty acid synthases (CFA synthases) catalyze the transfer of a methyl group from S-adenosyl-L-methionine (AdoMet) to the double bond of a lipid chain, thereby forming a cyclopropane ring. CFAs contribute to resistance to acidity, dryness, and osmotic imbalance in many bacteria. This work describes the first biochemical characterization of a lactic acid bacterium CFA synthase. We have overexpressed Oenococcus oeni CFA synthase in E. coli in order to purify the enzyme. The optimum cyclopropanation activity was obtained at pH 5.6 and 35.8 °C. The high K(m) (AdoMet) value obtained (2.26 mM) demonstrates the low affinity of O. oeni enzyme toward the L. lactis subsp. cremo…

Territoires d’effondrement : désastres, ruines, friches

2016

International audience