Study of components in Xingnaojing affecting intestine absorption of gardenia extract Studies on O/W partition coefficient and absorption kinetics of geniposide in fructus gardeniae extract in rat intestine O/W partition coefficient of PNS and absorption kinetics of it in rat intestine Study on in situ intestinal absorption of baicalin contained in Tiangou Jiangya capsules Intestinal absorption kinetics of Polygonum capitatum extract in rats