Flavonoid composition, antibacterial and antioxidant properties of tartary buckwheat bran extract

文献类型： 外文期刊

第一作者： Wang, Lijun

作者： Wang, Lijun;Yang, Xiushi;Qin, Peiyou;Ren, Guixing;Yang, Xiushi;Shan, Fang

作者机构：

关键词： Anti-acne;Flavonoids;Tartary buckwheat bran;Antibacterial;Antioxidant

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.645； 五年影响因子：5.749 ）

ISSN： 0926-6690

年卷期： 2013 年 49 卷

页码：

收录情况： SCI

摘要： The tartary buckwheat [Fagopyrum tataricum (L.) Gaench] bran, which is an important by-product during the production of tartary buckwheat tea, is a good source of flavonoids but has not been made full use of. Some studies reveal its antioxidant activity. However no research is found for its antibacterial activities against Propionibacterium and Staphylococci species. The 60% (v/v) EtOH extract of the tartary buckwheat bran (TBBE) was prepared at room temperature and the flavonoids content was determined by HPLC. Rutin (541.3 +/- 93 mg/g), isoquercetin (9.33 +/- 0.16 mg/g) and quercetin (663 +/- 1.14 mg/g) were detected in the TB BE. The inhibition zone of TBBE against four bacterial strains varied from 7.6 mm to 11.6 mm; minimum inhibition concentration (MIC) values were from 512 mu g/mL to 2048 mu g/mL. IC50 of DPPH scavenging activity and relative ORAC values were 8.36 +/- 0.27 mu g/mL and 11,090 +/- 1278 mu mol TE/g, respectively. For the constituents of TBBE querectin showed higher antioxidant and antibacterial properties than TBBE and its glycosides (isoquercetin and rutin). These results suggest that TBBE might be useful to develop new types of antibacterial substance and new skin care cosmetics to prevent or improve acne. (C) 2013 Elsevier B.V. All rights reserved.

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