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低聚羧甲基壳聚糖的抗氧化性能
孙 涛1, 银旭红1, 姚 倩1, 周冬香1, 邵则淮1
上海海洋大学食品学院
摘要:
将低聚壳聚糖(chitosan oligosaccharide, COS)醚化得到O-羧甲基壳聚糖(O-carboxymethyl chitosan oligosaccharide, O-CMCOS) 和N- 羧甲基壳聚糖(N-carboxymethyl chitosan oligosaccharide, N-CMCOS), 其取代度(substituting degree, DS)均为0.54, 用红外光谱对其结构进行表征。同时, 考察了其结构对超氧阴离子的清除活性以及还原能力。结果表明, COS 及其衍生物清除超氧阴离子的活性及还原能力的强弱顺序均为: O-CMCOS＞COS＞N-CMCOS。
关键词:  低聚壳聚糖  羧甲基壳聚糖  取代度  抗氧化  还原能力
DOI：
分类号:
基金项目:上海市教育委员会科研项目(07zz134); 上海市重点学科建设专项基金项目(T1102)
Antioxidant activity of carboxymethyl chitosan oligosaccharide
SUN Tao,YIN Xu-hong,YAO Qian,ZHOU Dong-xiang,SHAO Ze-huai
Abstract:
O-carboxymethyl chitosan oligosaccharide (O-CMCOS) and N-carboxymethyl chitosan oligosaccharide (N-CMCOS) with the same substituting degree (0.54) of carboxymethyl group were prepared by the etherification of chitosan oligosaccharide (COS), with their structures characterized by FTIR spectra. The orders of COS, O-CMCOS and N-CMCOS scavenging effect on superoxide anion and reducing power were O-CMCOS＞COS＞N-CMCOS.
Key words:  chitosan oligosaccharide  carboxymethyl chitosan oligosaccharide  substituting degree  antioxidant activity  reducing power
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