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Composition and the Physical and Chemical Characteristics of Tea Polysaccharide

Wang Dongfeng;Xie Xiaofeng;Wang Shilin;Zheng Jun;Yan Jun;Yan Hongde;Wang Zenong(1 Department of Tea Scicoce,Anhui Agricultural University,Hefei 230036)(2 Kunming Institute of Botany,Academia Sinica,Kunming 650024)  
Coarse tea contained high amount of crude tea polysaccharide(CTPS)which showed anti-diabetes activi-ty.Composition and the physical and chemical characteristics of the CTPS were investigated by methods of UV,IR,GC etc.The CTPS was composed of polysaccharide,protein,pectin,ash etc,and the polysaccharidewas composed of arabinose,xylose fructose,glucose and galactose with a proportion of 5.52:2.21:6.08:44.20:41.99.The molecule weight of the polysaccharide was about107000.The polysaccharide of the CTPS would degrade under the condition of high temperature,acidity(pH5.0)and alkalinity(pH7.0).The CTPS was soluble in hot water(about 76%)but insoluble in the high concentration sulutions of such or-ganic solvents as alcohol,ether,acetone,acetic ether etc.Components with blood-glucose depressing activityin coarse tea,factors influencing the composition and the molecule weight of the CTPS and the cause of thehigh content of ash in the CTPS were discussed.
【Fund】: 安徽省“八五”攻关项目
【CateGory Index】: S571.101
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