지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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The extraction of polyphenol and flavonoid from black rice bran was performed by diverse extraction methods using the sugar solution, ethanol, hot water (80oC), and by subcritical water extraction (SWE) method. By SWE under operating conditions of 190oC, 1,300 psi, and 10 min, the maximum yields of total polyphenolic compounds (35.06±1.28 mg quercetin equivalent (QE)/g dried material and flavonoids (7.08±0.31 mg QE/g dried material) could be obtained. These results were over 11.77- and 12.21-fold higher than those of the ethanol extraction, which showed the highest extraction efficiency among tested conventional methods in total polyphenols (2.98±0.74 mg QE/g dried material) and flavonoids (0.58±0.21 mg QE/g dried material), respectively. Though the highest antioxidant activity (87.14±1.14%) was observed at the dried extract obtained from ethanol method, the relative antioxidant activity per 1 g dried black rice bran by SWE (190oC, 10 min) was over 11.53-fold higher than that by the ethanol extraction.
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