The Antioxidant Activity of the Chitosan Oligosaccharide Derivatives by Maillard Reaction Between Chitosan Oligosaccharide and α-alanine/Asparagine

Abstract:

In this study,six kinds of the chitosan oligosaccharide derivatives,named CA-8,CA-16,CA-24,CN-8,CN-16 and CN-24were prepared though Maillard reaction by heating chitosan oligosaccharide and α-alanine/ asparagine(the ratio of carbonyl group and amino group was 4:1) at different time.Then,the antioxidant activity of those derivatives was investigated with superoxide anion radical/1,1-diphenyl-2-picrylhydrazyl(DPPH) radical scavenging and reducing power and index.The results indicated that the chitosan oligosaccharide derivatives exhibited more strong antioxidant activity than that of chitosan oligosaccharide.Furthermore,the derivatives from chitosan oligosaccharide with α-alanine had the better antioxidant activity than that of the derivatives prepared by chitosan oligosaccharide and asparagine.The reason is that the derivatives prepared by chitosan oligosaccharide and amino acid with the smaller molecule had the better antioxidant activity.