Scavenging effect on hydroxyl radical of KOG was between 40.0% and 60.0% at 6.0 mg/mL, but the effect on hydroxyl radical of Vc was between 40.0% and 60.0% at 0.4 mg/mL, KOG showed certain effects on scavenging the hydroxyl radicals, but lower than that of Vc.
For hydroxyl radical, there are two types of antioxidation mechanism: one suppresses the generation of the hydroxyl radical and the other scavenges the hydroxyl radicals generated (Qi et al.,2005). In this study, in another assay system, KOG can scavenge the hydroxyl radicals because of the reducing hemiacetal hydroxylin the chains, which can make highly oxidizing free radicals reducted.