天然产物研究与开发 ›› 2011, Vol. 23 ›› Issue (4): 713-716.

• 开发研究 • 上一篇    下一篇

不同取代度N-邻苯二甲酰壳聚糖抗氧化活性的研究

孙 涛*,银旭红,谢 晶,康永峰,周冬香   

  1. 上海海洋大学食品学院,上海 201306
  • 收稿日期:2009-11-16 出版日期:2011-08-25 发布日期:2011-09-13
  • 基金资助:

    上海市教育委员会科研项目(07zz134),上海市重点学科建设项目专项基金(T1102),上海市生物医药和农业科技领域重点科技项目(08391911500),2009年上海市优秀学科带头人计划(09XD1402000)

Antioxidant Activity of N-Phthaloyl-Chitosan Oligosaccharide with Different Substituting Degrees

SUN Tao*, YIN Xuhong, XIE Jing, KANG Yong-feng, ZHOU Dong-xiang   

  1. College of Food Science, Shanghai Ocean University, Shanghai 201306
  • Received:2009-11-16 Online:2011-08-25 Published:2011-09-13

摘要: 低聚壳聚糖与邻苯二甲酸酐酰化得到三种取代度不同的N-邻苯二甲酸酐酰低聚壳聚糖NPCOSA、NPCOSB和NPCOSC,取代度分别为0.33、0.55和0.65。通过红外光谱对其结构进行表征。并考察了其抗氧化性能。结果表明:COS的抗氧化性能最强;随着取代度的增加,N-邻苯二甲酰低聚壳聚糖对超氧阴离子的清除能力逐渐升高;而对DPPH的清除能力以及还原能力呈逐渐下降趋势;对羟基自由基的清除顺序大小依次为NPCOSB>NPCOSA>NPCOSC,即NPCOSB清除羟基自由基的的能力最佳。

关键词: 低聚壳聚糖, N邻苯二甲酰化低聚壳聚糖, 抗氧化性

Abstract: N-phthaloyl chitosan oligosaccharides (NPCOSA, NPCOSB and NPCOSC), having various degrees of substitution (DS were 0.33, 0.55 and 0.65, respectively), were prepared by chemical modification of chitosan oligosaccharide. The chemical structures of the chitosan oligosaccharides derivatives were characterized by FTIR. Their antioxidant activities were evaluated by the scavenging of superoxide anion radicals(O2.–), hydroxyl radical (.OH), DPPH radical and for reducing power. The results indicated that all the N-phthaloyl chitosan oligosaccharides showed lower antioxidant activity than chitosan oligosaccharides, the scavenging effect on O2.– increased with the increasing of DS, and their scavenging effect on DPPH and reducing power both were decreased with the increasing of DS; the order of their scavenging effect on .OH was NPCOSB>NPCOSA>NPCOSC, and the NPCOSB showed the strongest scavenging effect on .OH.

Key words: chitosan oligosaccharide, N-phthaloyl chitosan oligosaccharide, antioxidant

中图分类号: 

TS202.3