Search results for "Process Engineering"

Production of gamma-decalactone and 4-hydroxy-decanoic acid in the genus Sporidiobolus

1998

International audience

Perception analytique et synthétique des mélanges d’odorants : études combinées chez le lapereau nouveau-né et l’Homme adulte

2011

National audience

Do wine makers and wine sellers evaluate wine using the same criteria? The case of Burgundy red wines

2014

International audience

3D-QSAR study of ligands for two human olfactory receptors

2008

International audience; All living organisms, including human beings, are able to detect and discriminate myriads of structurally diverse odorants through their interaction with olfactory receptors (ORs) (1). It is well accepted that the perception of thousands of odors by about 380 ORs results from a combinatorial coding, in which one OR recognizes multiple odorants and different odorants are recognized by different combinations of ORs (2). In a previous study (3), the functional characterization on two human ORs, called OR1G1 (class II) and OR52D1 (class I) have been performed using 95 odorant molecules. We used these previously obtained functional data (3) to perform a molecular modellin…

La brazzéine, une protéine au goût sucré et aux propriétés hors normes

2018

Danss une démarche globale de réduction des sucres dans les produits alimentaires, les protéines au goût sucré sont une alternative encore peu répandue mais à fort potentiel. La brazéine, notamment, possède des propriétés très intéressantes pour l'industrie agroalimentaire. Quelles sont ces propriétés ? Comment peut-on la produire à échelle industrielle ? Quels sont les avantages et les inconvénients de cette protéine ?

L'arôme du gin : identification des composés clés et rôle des matières premières

2012

Le texte intégral de cette thèse est confidentiel à durée indéfinie.; Afin d’identifier les composés responsables de l’arôme du gin, une procédure GC-O-MS se basant sur la fréquence de détection a été développée. Elle a permis de déterminer l’intensité odorante des composés volatils. Leur qualité d’odeur a pu être définie par le développement d’une roue des odeurs utilisée pour catégoriser les descripteurs obtenus. Cette approche nous a dans un premier temps permis d’identifier les composés potentiellement importants pour l’arôme du gin. L’origine de ces composés a ensuite été déterminée par l’étude de la fraction volatile de différents « botanicals » appartenant à la recette du gin. Cette …

Time Course of Inflammation and Apoptosis in a Scopolamine–Induced Dry Eye Rat Model

2006

International audience; Purpose: : Dry eye syndrome is due to tear secretion deficiency or excessive tear evaporation leading to tear film instability. The aim of this study was to evaluate the time course of inflammation and apoptosis in a scopolamine–induced dry eye rat model. Methods: : Osmotic pumps continuously delivering scopolamine (12.5mg/d) were implanted subcutaneously in female Lewis rats for 1, 2, 3, 7, 10, 17 and 28 days. During the treatment, the corneal status was assessed by fluorescein impregnation and tears were collected for prostaglandin E2 (PGE2) immunoassay. At the end of the treatment period, the animals were sacrificed and the ocular tissues and the lacrimal glands w…

Identification of the Trail-Following Pheromone of the Pest Termite Amitermes evuncifer (Isoptera : Termitidae)

2010

International audience; Amitermes evuncifer (Termitidae, Termitinae) is a pest termite in several countries of Africa, damaging crops and buildings. The trail-following pheromone of this termite was isolated from worker sternal glands and identified by GC-MS after solid phase microextraction (SPME). The pheromone is composed of (3Z,67,8E)-dodeca-3,6,8-trien-1-ol (dodecatrienol) and neocembrene acting in synergy, neocembrene being 5-10 times more abundant than dodecatrienol. Dodecatrienol alone is able to elicit trail-following in workers, whereas neocembrene alone is inactive. However, the association of both components induces a significantly higher trail-following activity. Multicomponent…

Ethical and legal aspects in sensory studies: a pragmatic view point

2013

Lipid composition of lacrimal glands in rats: comparison with human lacrimal glands and possible nutritional modulation

2007

International audience; Purpose:: Prostaglandins (PGs) have been found in tears of patients with ocular surface disorders, and are powerful markers of inflammation. The lacrimal gland has been reported to synthesize PGs. Polyunsaturated fatty acids esterified in phospholipids are the precursors of pro- and anti-inflammatory PGs. The aim of this study was to compare the phospholipid content of the lacrimal gland in human and in different rat species. Moreover the changes in fatty acids of the lacrimal glands of Lewis rats were studied after a nutritional intervention. Methods:: Lacrimal glands were excised from Wistar, Sprague-Dawley and Lewis rats (3 month-old) and from Humans 3 to 36 hours…