期刊
FOOD CHEMISTRY
卷 114, 期 4, 页码 1285-1290出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2008.10.082
关键词
Fucoidan; Derivatives; Antioxidant activity
资金
- Scientific and Technical of Shandong province [2007 GG10005007]
- Chinese Academy of Sciences [KZCX2-YW-209]
Three sulphated polysaccharide derivatives (oversulphated, acetylated and benzoylated fucoidan) were successfully synthesized, and their antioxidant activities were investigated employing various established in vitro systems. A novel catalyst N-bromosuccinimide (NBS) was used in acetylation and benzoylation reaction, and the degree of acetylation was evaluated using IR and NMR spectra. Both fucoidan derivatives possessed considerable antioxidant activity, and had stronger antioxidant ability than fucoidan in certain tests. The benzoylated fucoidan showed strongest superoxide and hydroxyl radical scavenging activity, however, the acetylated fucoidan exhibited strongest activity on scavenging DPPH radical and reducing power. Available data obtained with in vitro models suggested that substituted groups of fucoidan played an important role on antioxidant activity. The mechanism on the antioxidant activity of sulphonyl, acetyl and benzoyl group is different. (C) 2008 Elsevier Ltd. All rights reserved.
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