NATURAL PRODUCT RESEARCH AND DEVELOPMENT ›› 2011, Vol. 23 ›› Issue (3): 530-533.

• Article • Previous Articles     Next Articles

Antioxidant Activity of Phthaloyl Derivative of κ-Carrageenan Oligosaccharides

SUN Tao*, TAO Hui-na, ZHOU Dong-xiang, MAO Fang, XIE Jing   

  1. College of Food Science, Shanghai Ocean University, Shanghai 201306, China
  • Received:2009-10-30 Online:2011-06-25 Published:2011-08-08

Abstract:

Three κ-carrageenan oligosaccharides were prepared by acidic degradation of κ-carrageenan. Their phthaloyl derivatives with different molecular weight (LA:1450;LB:2520;LC:3430) were synthesized with phthalic anhydride. The products were characterized by FI-IR,and the degrees of acylation (DS) were determined. Their antioxidant activities were evaluated by the scavenging of hydroxyl radical,1,1-diphenyl-2-picrylhrazyl radicals (DPPH) ,hydrogen peroxide and reducing power. The results indicated that the orders of antioxidant activities were: LC >LA >LB. It may be related to the content of hydroxyl groups,the nature of substituting group and the substituting degrees.

Key words: κ-carrageenan, acid degradation, phthaloyl, antioxidant activity

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