Accelerated Solvent Extraction of Flavan-3-OL Derivatives from Grape Seeds
نویسندگان
چکیده
منابع مشابه
Antioxidative flavan-3-ol glycosides from stems of Rhizophora stylosa.
Two flavan-3-ol glycosides together with seven flavan-3-ols were isolated from stems of the mangrove plant, Rhizophora stylosa. Their structures were established as glabraoside A (7) and glabraoside B (8) by spectroscopic and chemical methods. The antioxidative activity of these isolated compounds evaluated by the diphenylpicrylhydrazyl (DPPH) radical scavenging reaction was higher than that of...
متن کاملSynthesis and biological evaluation of flavan-3-ol derivatives as positive modulators of GABAA receptors.
We herein describe the synthesis and positive modulatory activities of a small library of flavan-3-ol derivatives on alpha(1)beta(2)gamma(2L) GABA(A) receptors. Structure-activity relationships of various substituents on the A, B and C rings were evaluated in a functional electrophysiological assay. A trans configuration and a 3-acetoxy moiety are essential for activity. Substitution of the B r...
متن کاملExtraction and Characterization of Proanthocyanidins from Grape Seeds
Grape seed contains many polyphenolic compounds that have potential health-promoting benefits. Among these compounds are proanthocyanidins, also known as condensed tannins, which is a class of flavanols. The basic structural building blocks of flavanols are polyhydroxyflavan-3-ol units linked together by C-C bonds. They are widely distributed in plants but grape seed has very high contents. Thi...
متن کاملPolyphenol extraction from grape wastes: Solvent and pH effect
World wine industry transforms 10% 25% of raw grapes into residues, mainly represented by lees, grape marcs, seeds and stems. These byproducts are a rich source of polyphenols and therefore they can be used to produce new added value products. The aim of this work was to determine the best process conditions (treatment time, % of ethanol and pH of the solvent) during solid-liquid extraction of ...
متن کاملChanges of flavan-3-ols with different degrees of polymerization in seeds of 'Shiraz', 'Cabernet Sauvignon' and 'Marselan' grapes after veraison.
Flavan-3-ols consist of flavan-3-ol monomers and polymers with different degrees of polymerization (DP). In this study, flavan-3-ol extracts from grape seeds were well separated into three fractions including monomers, oligomers (2 < DP < 10) and polymers (DP > 10), by means of normal-phase HPLC-MS. The different patterns of these three fractions were analyzed in three Vitis vinifera cultivars ...
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ژورنال
عنوان ژورنال: Food Science and Technology Research
سال: 2014
ISSN: 1344-6606,1881-3984
DOI: 10.3136/fstr.20.409