期刊
FOOD RESEARCH INTERNATIONAL
卷 123, 期 -, 页码 518-528出版社
ELSEVIER
DOI: 10.1016/j.foodres.2019.04.064
关键词
Banana condensed tannins; Biologically important metal ions; Divalent transition metal ions; Metal-binding capacity; Condensed tannin-metal ion coprecipitates; Interaction mechanism
资金
- National Key Research and Development Program of China [2018YFD0401302]
To characterize the interactions of banana condensed tannins (BCT) with copper (Cu2+), zinc (Zn2+) and iron ions (Fe2+), various methods and techniques were utilized in the current work. Our findings indicated that BCT isolated from green bananas (cv. Brazil) were a mixture of flavan-3-ol oligomers with degree of polymerization in the range of 3-5 and with the trimers as the main component. The (-)-epigallocatechin and (-)-epicatechin were the dominant units of oligomer structures. BCT could interact with divalent transition metal ions mainly via catechol group-ion exchange and pyrogallol group-ion exchange, while static quenching mechanism was the main action mode of BCT fluorescence quenching by metal ions. The effectiveness of precipitation of metal ions by BCT decreased with the order of Fe2+ > Cu2+ > Zn2+. Alternatively, the characteristics of BCT-metal ion coprecipitates confirmed the interactions between BCT and divalent metal ions. Therefore, characterization of the interaction mechanisms between BCT and biologically important metal ions should help in the design of strategies to prevent the metal-induced toxicity in individuals with a high exposure of transition metal ions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据