Sun, Yao, Zhou, and Mao(2008) reported that the N-carboxymethyl chitosan oligosaccha-rides (N-CMCOSs) have antioxidant activity, and different degreesof substitution of N-CMCOSs have different ability in the scavenging of 1,1-diphenyl-2-picrylhrazyl radical (•DPPH) radical, superoxide anion and determination of reducing power. However, the reare few reports regarding the antioxidant activities of degradation products from KG.
The objective of this research was to study and optimize enzymatic hydrolysis conditions of KG using-mannanase. The composition and antioxidant activities of the oligosaccharides were evaluated.