미강의 토코페롤 및 토코트리에놀 함량과 항산화 물질의 품종간 비교

• 영문명: Cultivar Comparison on Tocopherols, Tocotrienols, and Antioxidant Compounds in Rice Bran
• 발행기관: 한국작물학회
• 저자명: 천아름(Areum Chun) 이유영(Yoo-Young Lee) 김대중(Dae-Jung Kim) 윤미라(Mi-Ra Yoon) 오세관(Sea-Kwan Oh) 최임수(Im-Soo Choi)홍하철(Ha-Cheol Hong)
• 간행물 정보: 『한국작물학회지』제58권 제4호, 367~375쪽, 전체 9쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2013.12.30

영문 초록

The rice bran, a by-product of rice milling process, is well known for various functional components, such as tocopherol, tocotrienol, γ-oryzanol, carrying antioxidant activities. This study was conducted to investigate the antioxidant components and antioxidant activities in rice bran of different Korean rice cultivars. The 8 isomers of vitamin E, γ-oryzanol, flavonoids, and polyphenolics in rice bran from 16 Korean premium and high quality rice cultivars were quantified. DPPH and ABTS radical scavenging activities and reducing power of the ethanol extracts of rice bran were measured. ‘Hopum’ showed the highest total vitamin E content, 221.47 µg/g among the cultivars, and ‘Hanseol’ showed the lowest content. The rice bran showed different compositions of α-, β-, γ-, δ- tocopherol and tocotrienol among rice cultivars. The antioxidant contents were also different by cultivar; the γ-oryzanol contents ranged from 1.99 mg/g (Unkwang) to 4.30 mg/g (Chilbo), the polyphenol contents ranged from 427.22 mg gallic acid eq./100 g (Odaebyeo) to 775.80 mg gallic acid eq./100 g (Hopum). ‘Hopum’ also had the highest DPPH and ABTS free radical scavenging activities, 9.82% and 187.5 AEAC mg/100 g, respectively. In vitro, the rice bran extracts from ‘Hopum’ had significantly higher antioxidant activities than that of other cultivars.

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rice bran tocopherol tocotrienol antioxidant antioxidant activity