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Comparison of tea polysaccharides extracted by different technology

Chen Haixia et al.  
Green tea crude polysaccharides were extracted by three extraction technologies,including the method of using ethanol,the method of using ultra\|filtration,the method of using CTAB.Their compositions and biological activities were studied here.Results showed that the method of using ultra\|filtration was the best.The crude polysaccharides obtained by the ultra\|filtration method were more active than the other two methods by 23.5% and 37.1%.The polysaccharides were composed of arabinose,ribose,xylose,glucose and galactose with smaller proportions of galacturonic acid.The ratios of monosaccharide were different owing to different technology.
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