Effects of EGTA, verapamil and trifluoperazine on ABA, and xylem sap pH of maize seedling under drought stress Effect of verapamil on pharmacokinetics of puerarin in rats Absorption mechamism of dehydroandrographolide in human Caco-2 cell monolayer model Absorption mechamism of dehydroandrographolide in human Caco-2 cell monolayer model Effects of coumarin from LEG on contractivity in isolated rabbit ileum Analgesic effect of oxysophoridine and its mechanism Effect of Yuanhua on Isolated Uterine Strips in Unpregnant Rats