Search results for "Propriété"
showing 10 items of 153 documents
Les déterminants de la qualité des conseils d'administration français
2005
International audience; Dans cet article, nous vérifions si la "qualité" des conseils d'administration dépend de la structure de propriété et de la politique financière des grandes sociétés cotées en bourse, caractérisées par une séparation de la décision (control) et du contrôle (ownership). En nous basant sur la théorie de l'agence, nous considérons que les conseils sont de meilleure qualité lorsqu'ils comprennent une fraction élevée d'administrateurs indépendants et/ou lorsque les fonctions de direction générale et de présidence du conseil sont dissociées. Pour les 85 sociétés cotées en bourse de notre échantillon, nous confirmons notamment que la qualité des conseils croît avec la fract…
Characterization of two Lactococcus lactis zinc membrane proteins, Llmg_0524 and Llmg_0526, and role of Llmg_0524 in cell wall integrity
2015
Background Due to its extraordinary chemical properties, the cysteine amino acid residue is often involved in protein folding, electron driving, sensing stress, and binding metals such as iron or zinc. Lactococcus lactis, a Gram-positive bacterium, houses around one hundred cysteine-rich proteins (with the CX2C motif) in the cytoplasm, but only a few in the membrane. Results In order to understand the role played by this motif we focused our work on two membrane proteins of unknown function: Llmg_0524 and Llmg_0526. Each of these proteins has two CX2C motifs separated by ten amino-acid residues (CX2CX10CX2C). Together with a short intervening gene (llmg_0525), the genes of these two protein…
Additive manufacturing Processing and characterization of Fe-Si soft magnetic alloys
2021
Iron silicon (Fe-Si) alloys, also named silicon steels, are the most widely used owing to their excellent soft magnetic properties and economic costs. As electronic devices become diversified and automated, it is urgent to develop high-performance soft magnetic alloys with good reliability. For functional soft magnetic alloys, the SLM technique shown the potential to manufacture soft magnetic components directly from raw materials, such as the rotor and stator of the motor. In order to explore and develop new routes for manufacturing Fe-Si alloys, the investigation into the microstructures and properties of SLMed Fe-Si alloys from pre-alloyed powders was presented in this work. The most imp…
Elaboration of multimaterial optical fibers with electro-optical functionalities
2022
The emergence of multimaterials optical fibers is of tremendous technological interest in photonics to combine the remarkable properties of glasses with those of other materials such as metals or polymers in order to form a fully integrated fiber optical system with multiple functionalities. Among these hybrid fibers, the development of fibers combining both optical signal and simultaneous electrical transport function could bring alternative interesting solution in many fields such as telecommunications, medicine or sensing. The drawing of architectures merging electrical and optical features in a unique elongated wave-guiding structure will enable to develop electro-optical functionalitie…
Acute effects of static and dynamic stretching on the neuromuscular system
2019
Stretching is traditionally incorporated into pre-exercise routines in health, rehabilitation and sporting environments to condition the neuromuscular system for exercise. While a large body of evidence reported that stretching may acutely impair the subsequent muscular performance, some conflicting results highlight possible mitigating factors of neuromuscular responses variability. Because the limited data available do not present a clear consensus, the aim of this thesis was to investigate the effects of different factors on neuromuscular responses to stretch: the muscle group, the stretch duration and modality. By means of four studies, it has been shown that static stretching may alter…
Morphological characterisation of soil structure in tilled fields: from a diagnosis method to the modelling of structural changes over time
2004
Characterisation of soit structure within the tilled layer of cultivated fields is crucial because the importance of this soil characteristic on the biological, chemical and physical properties of the soil and its repercussions on water cycle, root growth and functioning. We present in this paper a method for field characterisation of soil structure. This method, practised since the 1970s, was designed for field diagnosis of the effects of cropping systems on soil structure. It is based on a stratification of the observation face of a pit dug perpendicular to the direction of tillage and traffic: spatial compartments are distinguished, according to the nature of the mechanical stresses they…
Clause de réserve de propriété. Inclusion du bien dans un plan de cession, Créance de l'article 40 au profit du vendeur revendiquant (oui)
1994
International audience; (Com. 9 juin 1992, Sté Creusot-Loire Industrie c/, Sté Sud Marine et autres)
Polygalacturonate hydrogels using Fe2+ as cross-linkers : impact of the local association mode on gelation mechanisms, control of the multiscale stru…
2018
This pHD thesis describes the design of polygalacturonate hydrogels (polyGal) cross-linked by the Fe2+ cations, and their experimental characterization from the molecular scales up to the macroscopic scales, by combining EXAFS spectroscopy, Small Angle Neutron Scattering (SANS) and rheological measurements. We designed a robust gelling protocol that allowed to obtain reproducible cylindrical gels with controlled concentration gradients from the lower side to the upper side of the gel. The ratio [Fe]/[Gal] has a constant value all along the gel, which demonstrate that the Fe2+ cations are associated with 4 galacturonate units. The comparison of EXAFS measurements and molecular dynamics simul…
Study of the interactions and physicochemical properties of pea and egg white protein mixtures : from the colloidal to the gelled state.
2022
In recent years, due to the growth of world population, people's consumption of animal protein has increased, leading to the increase of greenhouse gas emissions and land occupation. Therefore, it is necessary to partially replace animal protein with vegetable protein to increase the proportion of vegetable protein in daily consumption and developing mixed food systems seems to be one adequate solution. Pea proteins as a source of plant proteins have good nutritional properties but with limited functional properties while egg white (EW) has good functional properties such as gelling and foaming. Thereby, the physicochemical interactions from mixtures of both types of protein needs to be und…