Hypoglycemic effects of aqueous extract from Taraxaci Herba on diabetic rats induced by Streptozotocin and its mechanism In vitro investigation on improvement in puerarin intestinal absorption Absorption characteristics of 5 components of Xinshao extract in Caco-2 cells Study on transport of sophocarpine in millicell system by LC-MS In vitro investigation on improvement in puerarin intestinal absorption Uptaking characteristics of puerarin in Caco-2 model system Absorption and transportation characteristic of alkaloids from Herba Ephedrae in model of Caco-2 cells monolayer Effects of flavonoids from Glycyrrhizae Radix on function and expression of P-glycoprotein in Caco-2 cells Study on purification technology of total flavonoids from Schizonepetae Herba with resistance of Caco-2 cells based on grey correlation degree analysis