期刊
CARBOHYDRATE RESEARCH
卷 344, 期 9, 页码 1095-1101出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2009.03.024
关键词
Red wine; Polysaccharides; Galactan; Arabinan; Antioxidants
资金
- DICYT (Universidad de Santiago de Chile)
A neutral fraction (PS-SI) (0.3 g/L) with MW of 74 kDa, which contained galactose, arabinose, mannose, and glucose in the molar ratio of 1.0:0.6:0.4:0.2 was obtained by treatment of the whole polysaccharide extracted from red wine with cetrimide, followed by gel permeation chromatography. Spectroscopic and methylation analyses indicated that PS-Sl is a mixture of neutral polysaccharides, consisting mainly of beta (1 -> 3)-linked galactopyranosyl residues, with side chains of galactopyranosyl residues at positions O-6. Arabinofuranosyl residues linked alpha (1 -> 5), alpha-mannopyranosyl and glucosyl residues appear to be components of different polysaccharides. The in vitro antioxidant capacity of fractions of wine polysaccharide was studied by hydroxyl radical scavenging and ORAC assays. Fraction PS-SI presented the strongest effect on hydroxyl radicals (IC50 = 0.21). (C) 2009 Elsevier Ltd. All rights reserved.
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