Antioxidant Compounds and Antioxidant Activities of Ethanol Extracts from Milling By-products of Rice Cultivars

• Published in: Han'guk Sikp'um Yŏngyang Kwahakhoe chi Vol. 39; no. 4
• Main Authors: Oh, S.K., National Institute of Crop Science, RDA, Suwon, Republic of Korea, Kim, D.J., National Institute of Crop Science, RDA, Suwon, Republic of Korea, Chun, A.R., National Institute of Crop Science, RDA, Suwon, Republic of Korea, Yoon, M.R., National Institute of Crop Science, RDA, Suwon, Republic of Korea, Kim, K.J., National Institute of Crop Science, RDA, Suwon, Republic of Korea, Lee, J.S., Chungbuk National University, Cheongju, Republic of Korea, Hong, H.C., National Institute of Crop Science, RDA, Suwon, Republic of Korea, Kim, Y.K., National Institute of Crop Science, RDA, Suwon, Republic of Korea
• Format: Journal Article
• Language: Korean
• Published: 01.04.2010
• Subjects: antioxidant activity; antioxidant compound; BYPRODUCTS; half-crushed rice; rice bran; SOUS-PRODUIT; SUBPRODUCTOS
• ISSN: 1226-3311
• DOI: 10.3746/jkfn.2010.39.4.624

This study was conducted to determine antioxidant compounds and antioxidative activities of by-products including rice bran and half-crashed rice by rice milling. DPPH, ABTS radical scavenging activities and reducing power have been used to investigate the relative antioxidative activities of 70% EtOH extracts from by-products. The contents of total polyphenol, total flavonoid and γ-oryzanol in EtOH extracts were measured by spectrophotometric methods, and vitamin E was carried out by HPLC. Ethanol extract from rice bran showed markedly antioxidative activity than that from half-crushed rice. Among EtOH extracts from milling by-products, rice bran of 'Hongjiju' tended to have the most effective antioxidative activity compared to the others. These results suggested that by-products of rice milling have the potent antioxidative activity and these activity are partly due to the antioxidative compounds present in by-products including rice bran and half-crushed rice.