Study on intestinal absorption features of oligosaccharides in Morinda officinalis How.with sigle-pass perfusion Effect of multicomponent environment on intestinal permeability of puerarin in biopharmaceutics classification system of Chinese materia medica Study on absorption kinetics of astragaloside Ⅳ in rat‘s intestines Study on effect of oligochitosan in promoting intestinal absorption of protoberberine alkaloids in extracts from Corydalis saxicola total alkaloids Study on in situ intestinal absorption of Pulsatilla saponin D in rats Intestinal absorption of aloe-emodin using single-passintestinal perfusion method in rat