Antioxidant activity of a flavonoid isolated from young green barley leaves

AGFD 68

Takayuki Shibamoto, tshibamoto@ucdavis.edu, Department of Environmental Toxicology, University of California, Davis, One Shields Avenue, Davis, CA 95616 and Hisao Umeda, humeda@ucdavis.edu, Environmental Toxicology, University of California, Davis, One Shields Avenue, Davis, CA 95616.
Saponarin (7-O-glucosyl isovitexin) isolated from young green barley leaves (Horidium vulgare L. var. nudum Hook) using Amberlite XAD-2 column chromatography was examined for its antioxidative activity. The antioxidative activity of saponarin toward various lipids, including fatty acids, lipoproteins, and blood plasma, was measured via its inhibitory effects toward malonaldehyde formation from lipids oxidized by Fenton's reagent. Its antioxidative activity was comparable to that of BHT or α-tocopherol (vitamin E). Its effect was greater than those of known natural antioxidants, such as β-carotene, vitamin C, and vitamin E. The stability of β-carotene was increased by the addition of this compound in an aqueous solution.
 

General Posters
1:00 PM-3:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Poster

Division of Agricultural & Food Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006