Antitumor effects of different extract fractions from Qinglongyi Influence of Perturbation of Energy Metabolism in Escherichia coli K235 on Biosynthesis of Polysialic Acid Study on the effects of two kinds of cactus polysaccharide on erythrocyte immune function of S180 mice Effect of aloe polysaccharide on erythrocyte membrane function of S180 mice Effect of Qinggan Huayu Capsules on immunohepatic fibrosis of rats Effect of Qinggan Huayu Capsules on immunohepatic fibrosis of rats Effect of Solanum nigrum total alkaloid on sialic acid and blocking degree of erythrocyte membrane in S180 mice Effect of Solanum nigrum total alkaloid on sialic acid and blocking degree of tumor cell membrane in H_(22) tumor-bearing mice Effect of Qinglongyi polysaccharide on sialic acid level, ATPase activity, and membrane potential in erythrocytes of S_(180) mice