期刊
GLYCOCONJUGATE JOURNAL
卷 29, 期 4, 页码 167-172出版社
SPRINGER
DOI: 10.1007/s10719-012-9377-2
关键词
Radix Hedysari; Polysaccharide; Phosphorylated modification; Antioxidant activity
资金
- China Postdoctoral Science Foundation [20090450017]
- Third China Postdoctoral Science Foundation [201003073]
- Fundamental Research Funds for the Central Universities [lzujbky-2010-134]
Phosphorylated modification of a polysaccharide obtained from Radix Hedysari (RHP) was studied. Three phosphorylated polysaccharides (RHPP) with variable degrees of substitution (DSp) were obtained with 4-dimethylaminopyridine (DMAP) and N, N' Dicyclocarbodiimide (DCC) as catalyst. The structures of RHPP were characterized by FT-IR spectra and C-13 NMR spectra. Depending on different reaction time, RHPP showed different DSp ranging from 0.30 to 0.66, and different Mw ranging from 86.6 to 89.7 KDa. Compared with RHP, RHPP exhibited superior antioxidant activities in vitro, which indicated that phosphorylated modification could enhance antioxidant activities of RHP. Furthermore, it was obvious that the DSp had a significant effect on the antioxidant activity.
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