Comparative characterisation of green tea and black tea cream: Physicochemical and phytochemical nature

被引:42
|
作者
Lin, Xiaorong [1 ]
Chen, Zhongzheng [1 ]
Zhang, Yuanyuan [1 ]
Luo, Wei [1 ]
Tang, Hao [1 ,2 ]
Deng, Baibiao [1 ]
Deng, Jian [1 ]
Li, Bin [1 ]
机构
[1] South China Agr Univ, Coll Food Sci, Guangzhou 510642, Guangdong, Peoples R China
[2] Guangdong Acad Agr Sci, Res Ctr, Drink Plant Res Inst, Guangzhou 510640, Guangdong, Peoples R China
基金
高等学校博士学科点专项科研基金;
关键词
Green tea; Black tea; Tea cream; Physical chemistry; Phytochemistry; CHEMICAL-COMPONENTS; CAMELLIA-SINENSIS; COLLOIDAL ASPECTS; CATECHINS; CAFFEINE; COMPLEXATION; ASTRINGENCY; INFUSIONS; BINDING; PROTEIN;
D O I
10.1016/j.foodchem.2014.10.048
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Tea cream is prevalent in various types of tea, yet a comparison of the mechanism of creaming in different teas remains uncertain. Here, we compared physicochemical characteristics, phytochemical composition, and simulated digestive profiles of green tea and black tea cream, looking to exploit their concentration and structure based mechanisms and in vitro bioaccessibility. Green tea cream particles were roughly one order of magnitude larger than those of black tea in size. Moreover, creaming concentrations of catechins, proteins and methylxanthines of green tea were dramatically higher than black tea. As major creaming components, gallated catechins, theaflavins, thearubigins, theabrownines, proteins and methylxanthines also exhibited high creaming affinities. Green tea cream particles, which were completely destroyed by simulated digestion, had few impacts on digestive recoveries of catechins and methylxanthines. In comparison, black tea cream particles were more stable under mimicking digestion, and clarification remarkably decreased the in vitro bioaccessibility of catechins and methylxanthines. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:432 / 440
页数:9
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