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

벼 품종별 도정 부산물 에탄올 추출물의 항산화 성분 및 항산화 효과

  • Oh, Sea-Kwan (National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Dae-Jung (National Institute of Crop Science, Rural Development Administration) ;
  • Chun, A-Reum (National Institute of Crop Science, Rural Development Administration) ;
  • Yoon, Mi-Ra (National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Kee-Jong (National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Jun-Soo (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Hong, Ha-Cheol (National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Yeon-Kyu (National Institute of Crop Science, Rural Development Administration)
  • 오세관 (농촌진흥청 국립식량과학원) ;
  • 김대중 (농촌진흥청 국립식량과학원) ;
  • 천아름 (농촌진흥청 국립식량과학원) ;
  • 윤미라 (농촌진흥청 국립식량과학원) ;
  • 김기종 (농촌진흥청 국립식량과학원) ;
  • 이준수 (충북대학교 식품공학과) ;
  • 홍하철 (농촌진흥청 국립식량과학원) ;
  • 김연규 (농촌진흥청 국립식량과학원)
  • Published : 2010.04.30


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 $\gamma$-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.


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