Dynamic changes in the free and bound phenolic compounds and antioxidant activity of brown rice at different germination stages
文献类型: 外文期刊
作者: Ti, Huihui 1 ; Zhang, Ruifen 1 ; Zhang, Mingwei 1 ; Li, Qing 1 ; Wei, Zhencheng 1 ; Zhang, Yan 1 ; Tang, Xiaojun 1 ; Deng 1 ;
作者机构: 1.Guangdong Acad Agr Sci, Sericultural & Agri Food Res Inst, Guangzhou 510610, Guangdong, Peoples R China
2.Guangdong Acad Agr Sci, Sericultural & Agri Food Res Inst, Guangzhou 510610, Gu
关键词: Brown rice;Germination stage;Phenolics;Flavonoids;Antioxidant activity
期刊名称:FOOD CHEMISTRY ( 影响因子:7.514; 五年影响因子:7.516 )
ISSN:
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收录情况: SCI
摘要: Germinated brown rice is a good source of the phenolics associated with antioxidant effects. Germination significantly increased by 63.2% and 23.6% the total phenolic and flavonoid contents, respectively. The percentage contribution of bound phenolics to total was 42.3% before and decreased slightly to 37.6% after germination. The percentage contribution of bound flavonoids to total, 51.1%, was the same before and after germination. The change in the amounts of free and bound forms indicated that transformations could occur during the germination process. Six individual phenolics were detected by HPLC. The levels of ferulic, coumaric, syringic, and caffeic acid significantly increased. The ratio of bound ferric reducing antioxidant power to total was basically constant, while germination increased the ratio of bound oxygen radical absorbance capacity to total. This indicated that the increase of bound phenolics exerts beneficial health effects throughout the digestive tract after absorption and may reduce mutations.
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