Results 221 to 230 of about 19,768 (263)
Some of the next articles are maybe not open access.
Variation of Proanthocyanidins in Lotus Species
Journal of Chemical Ecology, 2006The proanthocyanidin (PA) chemistry of 12 Lotus species of previously unknown PA content was examined in comparison with agricultural cultivars of L. pedunculatus, L. corniculatus, and L. tenuis and a "creeping" selection of L. corniculatus. Herbage harvested in winter 2000 and again in spring had extractable PA concentrations, estimations of which ...
Subathira, Sivakumaran +6 more
openaire +2 more sources
Journal of the Science of Food and Agriculture, 1998
Proanthocyanidin (PA) extraction, sample preparation and proanthocyanidin assay (butanol/HCl) reaction conditions were evaluated for measuring PA in Leucaena spp leaf material. The optimal conditions for extracting PA from leaf tissue are described, with short sequential sonications in 70% aqueous acetone being as efficient as prolonged sequential ...
Dalzell, Scott A., Kerven, Graham L.
openaire +3 more sources
Proanthocyanidin (PA) extraction, sample preparation and proanthocyanidin assay (butanol/HCl) reaction conditions were evaluated for measuring PA in Leucaena spp leaf material. The optimal conditions for extracting PA from leaf tissue are described, with short sequential sonications in 70% aqueous acetone being as efficient as prolonged sequential ...
Dalzell, Scott A., Kerven, Graham L.
openaire +3 more sources
Journal of Agricultural and Food Chemistry, 2019
Depolymerization of polymeric proanthocyanidins (PPCs) in grape seeds into oligomeric proanthocyanidins (OPCs), especially the dimers, has important academic significance and practical value. Reaction conditions including nucleophilic reagent/PPC mass ratio, HCl concentration, reaction time, and temperature were systematically optimized by central ...
Kui-Shan Wen +6 more
openaire +2 more sources
Depolymerization of polymeric proanthocyanidins (PPCs) in grape seeds into oligomeric proanthocyanidins (OPCs), especially the dimers, has important academic significance and practical value. Reaction conditions including nucleophilic reagent/PPC mass ratio, HCl concentration, reaction time, and temperature were systematically optimized by central ...
Kui-Shan Wen +6 more
openaire +2 more sources
Phytochemistry of proanthocyanidins
Phytochemistry, 1975Abstract Procyanidin A from Aesculus hippocastanum differs from the B type procyanidin in that it is difficultly soluble in water, gives a higher yield of cyanidin when heated in butanolic HCl and the production of cyanidin continues beyond the 2 hr period sufficient for maximum production in the case of B type procyanidin. Anthocyanidin production
openaire +1 more source
Flavonoids, proanthocyanidins, and the risk of stomach cancer
Cancer Causes & Control, 2010Flavonoids have been suggested to be responsible for the potential beneficial properties of fruit and vegetables on stomach cancer risk. To provide further information on flavonoids, proanthocyanidins, and gastric cancer risk, we analyzed data from a case-control study conducted in Italy.
M. Rossi +7 more
openaire +4 more sources
Biosynthesis of plant proanthocyanidins
Journal of the Chemical Society, Chemical Communications, 1974Studies of the biosynthesis of (–)-epicatechin and related plant proanthocyanidins have been made in Aesculus carnea and Rubus sp., these are interpreted in terms of a new scheme of biogenesis.
David Jacques, Edwin Haslam
openaire +1 more source
1988
Haslam’s previous accounts of this area of flavonoid chemistry (Haslam, 1975, 1982a) eloquently summarized the historical developments in the chemistry and biochemistry of this important and complex group of plant phenolics. Also covered were their relationship with condensed tannins and aspects of their characteristic chemical and spectroscopic ...
openaire +1 more source
Haslam’s previous accounts of this area of flavonoid chemistry (Haslam, 1975, 1982a) eloquently summarized the historical developments in the chemistry and biochemistry of this important and complex group of plant phenolics. Also covered were their relationship with condensed tannins and aspects of their characteristic chemical and spectroscopic ...
openaire +1 more source
Biflavonoids and Proanthocyanidins
1989The biflavonoids and proanthocyanidins constitute the two major classes of oligomeric flavonoids found in plants (126, 136). The biflavonoids are oxidative coupling products leading to biflavones, flavanone-flavones, and biflavanones. These compounds always carry carbonyl functions at the C-4 positions (126).
openaire +1 more source