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- W2000355297 abstract "Antioxidant thio-conjugates were obtained from white grape pomace by a clean and efficient one pot extraction and depolymerization method using water and cysteamine hydrochloride. To evaluate the potential of grape pomaces of different origins as sources of proanthocyanidins and conjugates, we conducted varietal comparative studies of polyphenol content, antioxidant power, and procyanidin composition. Xarel.lo proved to be the richest source of polyphenols. The total conversion into the conjugates was as high as 8 g/kg of Xarel.lo grape pomace, with a 50-fold excess of cysteamine, and 3 g/kg, with a 5-fold excess of cysteamine. After purification by preparative cation exchange and reversed phase high-performance liquid chromatography, 17 g of 63% pure 4beta-(2-aminoethylthio)epicatechin (acetate salt) was obtained from 35 kg of moist pomace. The procedure described here will make the antioxidant thio-derivatives efficiently available directly from raw plant byproducts such as grape pomace." @default.
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- W2000355297 date "2004-01-14" @default.
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- W2000355297 title "Efficient One Pot Extraction and Depolymerization of Grape (<i>Vitis vinifera</i>) Pomace Procyanidins for the Preparation of Antioxidant Thio-Conjugates" @default.
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- W2000355297 doi "https://doi.org/10.1021/jf035048l" @default.
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