頁籤選單縮合
題 名 | Bioactive Compounds and Antioxidative Activity of Colored Rice Bran |
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作 者 | Huang, Yu-ping; Lai, Hsi-mei; | 書刊名 | Journal of Food and Drug Analysis |
卷 期 | 24:3 2016.07[民105.07] |
頁 次 | 頁564-574 |
分類號 | 434.111 |
關鍵詞 | Antioxidative activity; Bran; Colored rice; Protocatechualdehyde; |
語 文 | 英文(English) |
英文摘要 | The profiles of bioactive compounds (including phenolics and flavonoids in free and bound fractions, anthocyanins, proanthocyanidins, vitamin E, and γ-oryzanol) of outer and inner rice bran from six colored rice samples collected from local markets were investigated. Proanthocyanidins could only be detected in red rice bran but not in black rice bran. The free fraction of the extracts dominated the total phenolics (72–92%) and the total flavonoids (72–96%) of colored rice bran. Most of the phenolic acids (83–97%) in colored rice bran were present in the bound form. Protocatechualdehyde was identified for the first time in the bound fraction of red rice bran by high performance liquid chromatography-photodiode array/electrospray ionization tandem mass spectrometry. The antioxidative activities of the free fraction of the colored rice bran were attributed to the proanthocyanidins in red colored rice and anthocyanins in black rice, while that of the bound fraction was mainly due to the phenolic acids. |
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