Antitumor effects of different extract fractions from Qinglongyi Effect of Qinglongyi polysaccharide on sialic acid level, ATPase activity, and membrane potential in erythrocytes of S_(180) mice Effect of Qinglongyi polysaccharide on Ca2+,Mg2+-ATPase activity and [Ca2+]i in erythrocyte of S180 mice Study on the acute toxicity experiment of mice and anti-tumor function in vitro of the qinglongyi Study on the effects of cool and hot ethanol extracts from Qinglongyi on the biochemical function of tumor membrane in H22 mice