NATURAL PRODUCT RESEARCH AND DEVELOPMENT ›› 2011, Vol. 23 ›› Issue (2): 219-223.

• Article • Previous Articles     Next Articles

The Maillard Reaction of Chitosan Oligosaccharide with Xylose and the Antioxidant Activity of the Chitosan Oligosaccharide Derivatives

SUN Tao*, CHEN Chun-hong, XIE Jing   

  1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
  • Received:2010-06-09 Online:2011-04-25 Published:2011-10-14

Abstract:

Four kinds of the chitosan oligosaccharide derivatives were prepared though Maillard reaction by heating chitosan oligosaccharide and xylose with different times (4 h and 8 h) and different proportions (the mass ratio of chitosan oligosaccharide and xylose was 1:1 and 1:3),named CX11-4、CX13-4、CX11-8 and CX13-8,respectively. The pH,absorbance,and fluorescence were determined during the reaction. The chitosan oligosaccharide derivatives were characterized by FTIR and their molecular weight was determined by GPC. Their antioxidant activity was investigated by employing various established in vitro systems,such as hydroxyl/1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals scavenging and reducing power. The results showed all of the derivatives had strong antioxidant activity compared to chitosan oligosaccharide. The antioxidant activity was found to be CX13-4>CX11-4 and CX11-8>CX13-8,which indicated that the antioxidant activity of the chitosan oligosaccharide Maillard derivatives is not only related to the ratio of –NH2 and –OH but also related to the reaction times.

Key words: chitosan oligosaccharide, xylose, Maillard reaction, reaction time, antioxidant activity