Free and Bound Phenolic Profiles and Antioxidant Activity of Milled Fractions of Different Indica Rice Varieties Cultivated in Southern China
This study quantified free and bound phytochemicals and their antioxidant activity in the endosperm and bran/embryo of different indica rice varieties.Phytochemicals mainly existed as free form in the bran/embryo and as both free and bound forms in the endosperm.The average values of total phenolic content, flavonoid content, FRAP, ABTS and ORAC values in the bran/embryo were 3.1, 10.4, 8.2, 11.2 and 11.4 times higher than those in the endosperm, respectively.In whole brown rice, the bran contributed 59.2%, 53.7%, 47.7%, 55.5% and 56.9% of total phenolics, flavonoids, FRAP, ABTS and ORAC values, respectively.Seven individual phenolics (gallic, protocatechuic, chlorogenic, caffeic, syringic, coumaric and ferulic acids) were detected with most coumaric and ferulic acids in the bran.All measurements exhibited varietal differences.These findings provide important information for improving human health by encouraging the consumption of whole brown rice and its use in food product development.
rice variety milled rice fraction phenolics flavonoids phenolic acids antioxidant activity
Huihui Ti Qing Li Ruifen Zhang Mingwei Zhang Yuanyuan Deng Zhencheng Wei Jianwei Chi Yan Zhang
Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, PR China
国内会议
2014年中国粮食加工产业升级企业家和专家学者峰会暨粮食机械与粮食深加工新产品展示会
郑州
英文
27-42
2014-07-26（万方平台首次上网日期，不代表论文的发表时间）