- 著者
- Asuka Taniguchi Karin Okubo Akiko Masuda Kazumi Kameda Toshiya Masuda
- 出版者
- Japanese Society for Food Science and Technology
- 雑誌
- Food Science and Technology Research (ISSN:13446606)
- 巻号頁・発行日
- pp.FSTR-D-23-00115, (Released:2023-09-20)
As part of our studies on the prevention of lifestyle-related diseases by processed foods, we evaluated the xanthine oxidase (XO) inhibitory activity of barley tea. The activity of the tea (a hot-water extract of roasted barley) was not as potent as that of another roasted beverage coffee. However, the activity of the ethyl acetate-soluble substance from the extract was significantly stronger than that of coffee. Through the purification of the substance, pyrogallol was identified as the most potent compound. After establishing a quantification process for pyrogallol in barley tea, we analyzed correlations between the amount of pyrogallol, color information of grains, and the XO inhibitory capacity of tea using roasted barley grains. The findings suggest that the XO inhibitory activity of barley tea can be evaluated based on the roast degree and chroma b* of barley grains through the content of pyrogallol, although other active compounds may be present in barley tea.
- 著者
- Toshiya MASUDA Nao FUJITA Yuka ODAKA Yoshio TAKEDA Shigetomo YONEMORI Katsuo NAKAMOTO Hideki KUNINAGA
- 出版者
- (社)日本農芸化学会
- 雑誌
- Bioscience, Biotechnology, and Biochemistry (ISSN:09168451)
- 巻号頁・発行日
- vol.71, no.9, pp.2316-2320, 2007-09-23 (Released:2007-09-23)
- 参考文献数
- 12
- 被引用文献数
- 15
The tyrosinase inhibitory activity of the extracts of 53 parts of 36 plant species cultivated for edible and medicinal use in Okinawa was investigated. The extract of Nandina domestica showed potent activity among these. The inhibitor in the extract was purified by assay-guided fractionation to give a simple phenol glucoside. Although it was a known compound (4-β-D-glucopyranosyloxybenzoic acid), its inhibitory activity toward tyrosinase is revealed for the first time in this work.