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http://dx.doi.org/10.9799/ksfan.2012.25.3.499

Quantification of γ-Oryzanol Components and Comparison Its Biological Activity in Brown Rice  

Kim, Young-Ju (Gyeonggibuk Science High School)
Ko, Jae-Ho (Gyeonggibuk Science High School)
Kim, Eun-Hye (Gyeonggibuk Science High School)
Nam, Hyuk-Jin (Gyeonggibuk Science High School)
Jo, So-Hee (Gyeonggibuk Science High School)
Kim, Heon-Woong (National Academy of Agricultural Science, RDA)
Kim, Jung-Bong (National Academy of Agricultural Science, RDA)
Han, Byoung-Su (Cheonghak High School)
Publication Information
The Korean Journal of Food And Nutrition / v.25, no.3, 2012 , pp. 499-504 More about this Journal
Abstract
We analyzed the contents of ${\gamma}$-oryzanol, which is contained in brown rice of the nation rice varieties Chucheong, Heukjinju and Sindongjin, by HPLC. Furthermore we also performed experiments on its biological activity, to prove the effectiveness of rice bran. The contents of ${\gamma}$-oryzanol contained in hulled rice showed 1,587 ppm for Heukjinju, followed by Chucheong(1,038 ppm), and by Sindongjin(472 ppm). In anti-oxidative activity, we performed an experiment, by measuring the radical scavenging activity of DPPH. Heukjinju showed the best effect, and Chucheong showed the worst effect. In cholesterol lowering activity, Heukjinju showed the best activity and Sindongjin showed the worst effect. In anti-bacterial activity as well, Heukjinju showed the best activity, and Sindongjin showed the worst effect. Through these experiments, we compared the contents of ${\gamma}$-oryzanol, which is contained in hulled rice(Chucheong, Heukjinju, Sindongjin). Also, we found the anti-oxidation effect, cholesterol lowering effect, and anti-bacterial activity of the ${\gamma}$-oryzanol extracts. Based on our research, we expect that ${\gamma}$-oryzanol can work as a new drug, or nutritional supplement.
Keywords
${\gamma}$-oryzanol; HPLC; anti-oxidative activity; cholesterol lowering activity; anti-bacterial activity;
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