University of Avignon

About: University of Avignon is a education organization based out in Avignon, Provence-Alpes-Côte-d'Azur, France. It is known for research contribution in the topics: Population & Speaker recognition. The organization has 1526 authors who have published 3766 publications receiving 88928 citations.

Le dirigeant comme levier de la RSE en TPE : approche exploratoire basée sur l’utilisation de récits et d’une cartographie cognitive

Abstract: La responsabilite sociale dans les petites entreprises est encore peu etudiee. Le dirigeant joue un role majeur dans la definition de la strategie. Par consequent, l’etude de ses croyances peut ameliorer la comprehension du developpement de la RSE. Pour cela, une etude de cas composee principalement d’un entretien et d’une cartographie cognitive a ete menee aupres d’un dirigeant d’une entreprise de cinq personnes, situee en Provence. Les resultats obtenus montrent la forte presence de la composante affective dans le panorama des comportements responsables, mais aussi la faible influence des objectifs financiers.

Alternative solvents for extraction of food aromas. Experimental and COSMO-RS study

Abstract: This study evaluates the performance of eight alternative solvents (α-pinene, MeTHF, Ethyl acetate, Ethyl lactate, Butanol, Isopropanol, Ethanol, Dimethylcarbonate) compared to n-hexane for extraction of food aromas from caraway seeds. It has been performed via experimentation and via predictive method COSMO-RS (Conductor like screening model - realistic solvatation) that uses a statistical thermodynamics approach based on the result of quantum chemical calculation, for comprehension of dissolving mechanism. Experimentally, aroma's extract from caraway seeds were analyzed by GC-FID or GC-MS to compare the solvent's performance in terms of major flavors compounds and in terms of yields and selectivity between the two major compounds: limonene and carvone. The results indicated that ethyl acetate and dimethylcarbonate (DMC) could be promising solvents for n-hexane substitution in extraction of food aromas. These alternative solvents give a similar aromatic profile and a better selectivity of carvone as major aromatic oxygenated monoterpene.

Two-dimensional electrophoretic analysis of proteins associated with somatic embryogenesis development in cupressus sempervirens l.

Abstract: Two-dimensional gel electrophoretic analysis and histological studies were performed on somatic embryos in cypress. Embryogenic cultures were obtained from in vitro culture of immature seeds. On a modified Murashige and Skoog (MS) medium they showed an intense and repetitive cleavage polyembryogenesis phenomenon which maintained them in a continuous proliferating status instead of undergoing a complete embryogenic development. Only the addition of bovine serum albumin to the culture allowed somatic embryo development and maturation. Major histological differences were noticed between developing and nondeveloping embryogenic cultures. Attempts to find proteins that could be associated with developmental stages of somatic embryos have been achieved. Proteins were extracted and analyzed by two-dimensional electrophoresis from nondeveloping embryogenic cultures (S0) and from embryogenic cultures at three different stages of somatic embryo development: small size and rounded shape embryos (S1), increased size embryos with a well-developed suspensor (S2) and embryos with two well-separated cotyledons (S3). The results revealed some qualitative and quantitative protein variations between the two cultures. Some could be connected with the induction of pro-embryo differentiation whereas others should be more related to the mechanisms involved in somatic embryo development and maturation. Specific polypeptides associated with the presence of bovine serum albumin (BSA) in the medium have been detected.