Search results for "Veterinary"
showing 10 items of 3026 documents
Mise au point et validation d'une technique d'extraction des arômes du beurre permettant de conserver la typicité de l'odeur des produits
1998
L'obtention d'un extrait representatif de l'odeur d'un aliment est une etape essentielle de l'analyse de ses composes d'arome. Dans le cas du beurre, deux techniques d'extraction ont ete comparees du point de vue de la qualite des extraits obtenus, avec l'aide d'un jury de degustateurs : une technique d'extraction sous vide et une technique d'extraction a l'eau. Les extraits obtenus par distillation sous vide, purement aqueux, ne sont pas representatifs des beurres d'origine. Neanmoins, ils en restituent toutes les qualites odorantes lorsqu'ils sont reincorpores au sein d'une emulsion comparable a celle du beurre. Les aromes extraits sont alors evalues dans un contexte tenant compte de leur…
Affinage et qualite du gruyere de Comte. V. Influence de l'affinage sur la teneur en composes volatils
1987
Vingt-quatre fromages de type Gruyere de Comte ont ete analyses. Ces fromages proviennent d'une meme fromagerie et correspondent a 6 groupes de 4 fromages issus d'une meme fabrication, a savoir, 3 fabrications d'hiver et 3 fabrications d'ete. Les 4 fromages sont affines dans 4 caves differentes. 103 composes ont ete identifies avec certitude, appartenant aux classes de composes suivantes: des hydrocarbures aliphatiques et terpeniques, des methylcetones saturees et insaturees, des aldehydes satures, des alcools primaires et secondaires satures, des esters et des lactones. Une analyse de variance univariable montre que l'effet saison est preponderant, ce qui est confirme par une analyse en co…
Flavor composition of oil obtained from crude and roasted oats
1989
chap. 12; International audience
Production of representative champagne extracts for olfactory analysis
1996
International audience
Quantitative analysis of new potent flavour compounds in Burgundy pinot noir wines
1996
International audience
Les mecanismes de formation de la flaveur dans les fromages
1987
National audience
Interactions between pectins and flavor compounds in strawberry jam
1994
International audience
Sensory analysis of Burgundy Pinot noir wines: A comparison of orthonasal and retronasal profiling
1999
Thirty Burgundy Pinot noir wines were evaluated by quantitative descriptive profile by nose (BN) and by mouth (BM) separately, by a trained panel composed of 12 judges. A specific vocabulary of 20 terms was developed. Sensory results were analyzed and compared by univariate and multivariate statistical techniques. Principal component analyses of the mean ratings BN and BM were fairly comparable regarding correlation among variables and the position of the wines. However, five sensory characteristics seem to be more intensely perceived BM, against 6 BN. Panel discrimination of the wines and panel repeatability in the measure were found to be slightly better BN than BM. A further canonical di…
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…
Copper binding capacity of root exudates of cultivated plants and associated weeds
2001
International audience; Cu binding to root exudates of two cultivated plants, wheat (Triticum aestivum) and rape (Brassica napus), and two weeds associated with wheat, dog daisy (Matricaria inodora) and cornflower (Centaurea cyanus), was studied in vitro under hydroponic and sterile conditions. Nutrient solutions were prepared with or without P. A MetPLATE microbiological test was used to assess the metal complexing capacity of root exudates. In the P-deficient solutions, no exudation was observed for any of the four plants; consequently, no Cu binding occurred. When P was present in the nutrient solutions, the plant exudates displayed differing abilities to complex Cu. No difference was de…