Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Antioxidant and Antimutagenic Activity of Solvent-Fractionated Layers of Colored Rice Bran

유색미 품종별 유기용매 추출물의 항산화성 및 항변이원성 검정

  • Kang, Mi-Young (Department of Food Science and Nutrition, Kyungpook National University) ;
  • Shin, Soo-Young (Department of Food Science and Nutrition, Kyungpook National University) ;
  • Nam, Seok-Hyun (Department of Biological Science, Ajou University)
  • Published : 2003.10.01
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Abstract

Twenty-four cultivars of colored rice seeds were collected inside and outside Korea, and the antioxidant and antimutagenic activity was determined for the solvent-fractionated layers of their bran parts lipid soluble fraction, pigment containing fraction, and pigment component per se. As the serial organic solvent extraction proceeded, the overall tendency of antioxidant activities declined with increased chemical homogeneity of each fraction. This markedly showed the low antioxidativities of the pigment components from LK 1-3-6-12-1-1 and Gillimhukmi. Even all the colored rice cultivars, with considerable antimutagenic activity in 70% ethanolic extract, exhibited mutagenicity when measured with its pigment containing fraction (wx 124-163-45-7-1-1-1 and LKlB-2-1-1 being the strongest). The pigment content in each colored rice seeds decreased in the order of IR 17491-5-4-3-3>LK 1-3-6-12-1-1>LK 1D-2-12-1>RGS No.336, Elwee. In addition, a substantial difference in both chemical composition of the constituents and its amount could be found between the colored rice and cooking rice cultivars. This revealed that, compared to cooking rice, major components of organic solvent fractions from colored rice probably have long hydrocarbon chain moieties.

국내 외에서 수집 재배한 24품종 유색미를 순차적인 유기용매 처리에 의해서 지용성 분획과 색소를 함유하는 분획, 색소성분 만의 분획을 얻었고 각 분획이 가지는 항산화성 및 항변이원성을 검정하였다. 유기용매 추출이 진행되어 분획성분의 조성이 간단해질수록 품종마다 차이는 없지만 항산화성은 오히려 약화되는 경향이 있었는데. 특히 LK 1-3-6-12-1-1과 길림흑미의 항산화 활성이 상당히 낮았다. 70%에탄올 추출물에서는 항변이원성을 나타내던 유색미 품종들도 색소분획을 포함하는 분획들에서는 모든 품종에서 오히려 변이원생을 나타내고 있었으며, 특히 wx 124-153-45-7-1-1-1 및 LK 1B-2-1-1 등에서 강한 변이원성이 관찰되었다. 유색미 품종별 색소의 함량은 IR 17491-5-4-3-3>LK 1-3-6-12-1-1>LK ID-2-12-1>RGS No336. Elwee 등의 순서로 나타난다. 유기용매에 의해서 분획되는 성분들의 조성 및 함량이 유색미 품종들과 일반미 품종간에는 상당히 차이가 있음을 알 수 있었으며, 일반미 품종에 비교하면 유색미 품종들의 유기용매에 의해서 용출되는 수된 성분 분사들은 긴 탄화수소를 가진 성분들이었다.

Keywords

References

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