Abstract: Based on reaction of Fenton and Haber - Weiss,by using the deoxyribose as a hydroxy radical moleculor,probe the degradation product of deoxyribose by thiobarbituric acid reaction was tested,and compared .The action and potency of scavenging oxygen radical species by superoxide dismutase(SOD),thiourea,tea- polyphenol and ginseng were studied.The results showed that tea- polyphenol could inhibit the anion radical action of superoxide(O2- ) with the effect similar to that of SOD. However ginseng could inhibit not only hydroxyradical(OH) but also O2- with the effect was similar to that of thiourea.

Key words: Ginseng/pharm Polyphenol/pharm Tea/pharm Radical Scavenger