Comparison of Nutritional Composition, Aroma Compounds, and Biological Activities of Two Kinds of Tartary Buckwheat Tea

文献类型: 外文期刊

第一作者: Guo, Huimin

作者: Guo, Huimin;Li, Jincai;Guo, Huimin;Yang, Xiushi;Luo, Xiuxiu;Qin, Peiyou;Ren, Guixing;Zhou, Haitao

作者机构:

关键词: aroma compound;flavonoid;nutritional composition;tartary buckwheat tea;tea soup

期刊名称:JOURNAL OF FOOD SCIENCE ( 影响因子:3.167; 五年影响因子:3.376 )

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年卷期:

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收录情况: SCI

摘要: Tartary buckwheat tea (TBT) is becoming increasingly popular for its unique flavor and health benefits. However, there is little information regarding the differences in nutritional quality among different kinds of TBT. Two kinds of TBT samples, whole grain tea (WGT) and whole plant tea (WPT), were collected from markets in China. The content of their nutritional compositions, including protein, amino acids, starch, fat, fatty acids, and flavonoids, as well as aroma compounds, were determined. Antioxidant and a-glucosidase inhibitory activities were also evaluated. WPT showed higher levels of protein and fat relative to WGT, but the content of essential amino acids and fatty acids was lower. WPT contained more total flavonoids with quercetin as the predominant flavonoid (81%), while rutin was the principal flavonoid compound (86%) in WGT. GC-MS analysis indicated that there were some differences in the aroma compound profile between WGT and WPT, though 14 aroma compounds were identified in both of them with 3-ethyl-2,5-dimethyl-pyrazine as the predominant compound. In addition, WPT showed superior antioxidant and alpha-glucosidase inhibitory activities than WGT. However, the total flavonoid content determined in tea soup was decreased by 60% and 98% compared with that in the alcohol extracts of WGT and WPT, respectively. The antioxidant and alpha-glucosidase inhibitory activities of tea soup were also lowered, especially for WPT. The differences between 2 kinds of TBT might be due to the variety of raw materials and processing methods. Diversified plant materials and scientific processing technologies should be taken into account to develop a nutritional and healthy TBT product.

分类号: TS2

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