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The total Siberian solomonseal rhizome polysaccharide (SRPS t ) and four fractional SRPS 30 , SRPS 50 , SRPS 70 and SRPS 80, were extracted by one-step or stepwise ethanol precipitation method. In test in vitro, their effects on chicken peripheral lymphocytes proliferation were compared. The result showed that SRPS 70 and SRPS 50 presented better...
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