Opinion of Colon-targeting Delivery about Rhubarb Extract as a Purgative Exploring relationship between traditional effects of traditional Chinese medicine and modern pharmacological activities by "co-effect compounds" Comparative studies on purgative potency among three spieces of certified rhubarb Comparative study on purgative activity of different extracts from Rheum tanguticum Comparative study on expelling water retention with drastic purgative of crude and vinegar stir-baked Kansui Radix in cancerous ascites rats Comparative effects of different extracts of Kansui Radix stir-baked with vinegar on function of expelling water retention with drastic purgative in cancerous ascites model rats Methodological study on quality evaluation of rhubarb based on purgative bioassay Filtration of active fractions with function of expelling water retention with drastic purgative from Kansui Radix stir-baked with vinegar