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Effects of degree of milling on nutritional quality, functional characteristics and volatile compounds of brown rice tea

文献类型： 外文期刊

作者： Zhou, Lei 1 ; Sui, Yong 1 ; Zhu, Zhenzhou 2 ; Li, Shuyi 2 ; Xu, Rui 1 ; Wen, Junren 1 ; Shi, Jianbin 1 ; Cai, Sha 1 ; Xiong, Tian 1 ; Cai, Fang 1 ; Mei, Xin 1 ;

作者机构： 1.Hubei Acad Agr Sci, Inst Agroprod Proc & Nucl Agr Technol, Key Lab Agroprod Cold Chain Logist, Minist Agr & Rural Affairs, Wuhan, Peoples R China

2.Wuhan Polytech Univ, Natl R&D Ctr Se Rich Agr Prod Proc, Hubei Engn Res Ctr Deep Proc Green Se rich Agr Pro, Sch Modern Ind Selenium Sci & Engn, Wuhan, Peoples R China

关键词： brown rice tea; degree of milling; nutrients; aroma compounds; OPLS-DA

期刊名称：FRONTIERS IN NUTRITION （ 影响因子：5.0； 五年影响因子：5.7 ）

ISSN： 2296-861X

年卷期： 2023 年 10 卷

页码：

收录情况： SCI

摘要： This study investigated the effects of rice preparation using different degrees of milling (DOM) from 0% to 13% on the nutritional composition, functional properties, major volatile compounds and safety of brown rice tea (BRT). We found that 2% DOM reduced 52.33% of acrylamide and 31.88% of fluorescent AGEs. When DOM was increased from 0% to 13%, the total phenolic content (TPC) of brown rice tea decreased by 48.12%, and the total flavonoid content (TFC) and condensed tannin content (CTC) also decreased significantly, with the smallest decrease at 2% DOM. In addition, the inhibitory activities of a-amylase, a-glucosidase and pancreatic lipase as well as the antioxidant activity also decreased gradually. Analysis by electronic nose and gas chromatography-mass spectrometry (GC-MS) showed that alkanes, furans, aldehydes, pyrazines and alcohols were the major volatiles in BRT, with 2% DOM having the greatest retention of aroma compounds. An orthogonal partial least squares discriminant analysis (OPLS-DA) and VIP score (VIP > 1 and p < 0.05) analysis were used to screen 25 flavor substances that contributed to the differences in BRT aroma of different DOMs. These results suggest that 2% milled BRT can improve safety and palatability while maximizing the retention of flavor compounds and nutrients. The findings of this study contribute to an enhanced understanding of the dynamics of changes and preservation of aroma compounds and nutrients present during the processing of BRT.

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