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Extraction of phenolics in liquid model matrices containing oak chips: kinetics, liquid chromatography–mass spectroscopy characterisation and association with in vitro antiradical activity Inra
Karvela, E.; Makris, D.P.; Kefalas, P.; Moutounet, M..
Four different liquid model matrices were utilised to study the leaching of polyphenols from oak chips. The matrices included distilled water, 12%, (v/v) ethanol, 12% (v/v) ethanol adjusted to pH 3.4, and 55% (v/v) ethanol. Extraction of phenolics into the liquid systems was monitored by the estimation of the total polyphenol concentration, using the Folin-Ciocalteu method. The in vitro antiradical activity was also recorded using the stable DPPH- radical, to ascertain enrichment of the solutions with potentially antioxidant compounds. As a final step, the polyphenolic composition of each matrix was characterised by means of liquid chromatography-clectrospray ionisation mass spectrometry. The kinetics of polyphenol leaching into the liquid phase was found...
Tipo: Journal Article Palavras-chave: ANTIRADICAL ACTIVITY; ANTIOXIDANT; HYDROLYSABLE TANNIN; MODEL SYSTEM; OAK CHIP.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008b0893382&uri=/notices/prodinra1/2009/02/
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Pathological effects of the microsporidium Nosema ceranae on honey bee queen physiology (Apis mellifera) Inra
ALAUX, C.; Folschweiller, M.; McDonnell, C.; Beslay, D.; Cousin, M.; Dussaubat, C.; Brunet, J.L.; Le Conte, Y..
Nosema ceranae, a microsporidian parasite originally described in the Asian honey bee Apis cerana, has recently been found to be cross-infective and to also parasitize the European honey bee Apis mellifera. Since this discovery, many studies have attempted to characterize the impact of this parasite in A. mellifera honey bees. Nosema species can infect all colony members, workers, drones and queens, but the pathological effects of this microsporidium has been mainly investigated in workers, despite the prime importance of the queen, who monopolizes the reproduction and regulates the cohesion of the society via pheromones. We therefore analyzed the impact of N. ceranae on queen physiology. We found that infection by N. ceranae did not affect the fat body...
Tipo: Journal Article Palavras-chave: MICROSPORIDIE; PARASITE; REINE; SANTE; PHYSIOLOGIE; CORPS GRAS; ENERGIE; VITELLOGENINE; FERTILITE; LONGEVITE; ANTIOXIDANT; PHEROMONE MANDIBULAIRE MICROSPORIDIA; QUEEN; HEALTH; PHYSIOLOGY; FAT BODY; ENERGY; VITELLOGENIN; FERTILITY; LONGEVITY; MANDIBULAR PHEROMONE; PHEROMONE; HONEY BEE QUEEN; VITELLOGENIN; QUEEN MANDIBULAR PHEROMONES; ANTIOXIDANT CAPACITY.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20116cf9b1bf&uri=/notices/prodinra1/2011/04/
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rs5888 variant of SCARB1 gene is a possible susceptibility factor for age-related macular degeneration Inra
Zerbib, J.; Seddon, J.M.; Richard, F.; Reynolds, R.; Levéziel, N.; Benlian, P.; Borel, P.; Feingold, J.; Munnich, A.; Soubrane, G.; Kaplan, J.; Rozet, J.M.; Souied, E.H..
Major genetic factors for age-related macular degeneration (AMD) have recently been identified as susceptibility risk factors,including variants in the CFH gene and the ARMS2 LOC387715/HTRA1locus. Our purpose was to perform a case-control studyin two populations among individuals who did not carry risk variants for CFHY402H and LOC387715 A69S (ARMS2), called‘‘study’’ individuals, in order to identify new genetic risk factors. Based on a candidate gene approach, we analyzed SNPrs5888 of the SCARB1 gene, coding for SRBI, which is involved in the lipid and lutein pathways. This study was conducted ina French series of 1241 AMD patients and 297 controls, and in a North American series of 1257 patients with advanced AMDand 1732 controls. Among these...
Tipo: Journal Article Palavras-chave: DMLA; DEGENERESCENCE MACULAIRE; MALADIE DE L'OEIL; PREVENTION DES RISQUES; CHOLESTEROL; POLYMORPHISME; LUTEINE; VITAMINE E; RETINE HUMAINE AMD; MACULAR DEGENERATION; HUMAN HEALTH; ANTIOXIDANT; RISK FACTOR; LUTEIN; VITAMIN E; LIPIDS.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009961264e2&uri=/notices/prodinra1/2009/10/
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Synthèse et études de tétrahydrocurcuminoïdes : propriétés photochimiques et antioxydantes : applications à la préservation de matériaux d'origine naturelle Inra
Portes, E..
Une grande variété de curcuminoïdes Cs et de tétrahydrocurcuminoïdes THCs a été synthétisée et leurs propriétés antioxydantes ont été étudiées en détail par la méthode du radical DPPH°. Pour la première fois, il a été montré que les propriétés antioxydantes supérieures des THCs par rapport à leurs homologues curcuminoïdes sont dues à la présence d’atomes d’hydrogène benzyliques dans les THCs. L’association de THCs avec un biopolymère, le chitosane, a permis l’élaboration de films à propriétés antioxydantes et antibactériennes. Des interactions entre les THCs et le chitosane ont été mises en évidence par spectroscopie d’absorption UV-visible. Les THCs et plus particulièrement la tétrahydrocurcumine, se sont révélés capables à la fois d’inhiber le...
Tipo: Thesis Palavras-chave: MATÉRIAUX D'EMBALLAGE; ACTIVITÉ ANTIFONGIQUE; ULTRA VIOLET; FUMONISINE; SYNTHESE CHIMIQUE; MYCOTOXINE; TETRAHYDROCURCUMINOÏDES; PROPRIÉTÉS PHOTOCHIMIQUES; ANTIOXYDANT; PRÉSERVATION DES CÉRÉALES TETRAHYDROCURCUMINOIDS; ANTIOXIDANT; PHOTOCHEMISTRY PROPERTIES; ANTIFUNGAL ACTIVITY.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009e440dfdf&uri=/notices/prodinra1/2009/12/
Registros recuperados: 4
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