The extension of vacuum microwave drying time improved the physicochemical properties, in vitro digestibility and antioxidant activity of brown rice flour

文献类型： 外文期刊

第一作者： Shao, Zihan

作者： Shao, Zihan;Song, Yu;Hong, Ying;Tao, Shu;Sun, Jian;Liu, Chao;Cao, Lei;Wu, Zeyu

作者机构：

关键词： Brown rice flour; Vacuum microwave drying; Pasting properties; In vitro digestion; Antioxidant activity

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：6.0； 五年影响因子：6.0 ）

ISSN： 0023-6438

年卷期： 2023 年 184 卷

页码：

收录情况： SCI

摘要： In this study, the effects of vacuum microwave drying (VMD) time on the physicochemical properties, di-gestibility and antioxidant activity of brown rice flour (BRF) were investigated. BRF samples were treated with VMD at 6 W/g, 70 degrees C and 0.08 MPa vacuum pressure for 2, 4, 6, 8, and 10 min, respectively. Compared with the control group, VMD increased water solubility index (+29.68%, at 8 min) and amylose content (+16.73%, at 10 min). The thermal analysis results showed that the crystallinity of starch from brown rice reduced and became more homogeneous after microwave treatment. The in vitro digestion results indicated that VMD treatment decreased the digestibility of BRF samples. The content of resistant starch increased from 24.53% to 27.21%- 31.55%. In addition, the soluble phenolics content of BRF samples subjected to VMD treatment ranged from 108.99 to 114.43 mg GAE/100 g dry weight (DW), higher than that of the control group (103.95 mg GAE/100g DW), thus significantly improving free radical scavenging activity. In conclusion, VMD can be used as a drying and modification method for better quality BRF production in the future.

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