Studies on in vivo release of berberine hydrochloride from carboxymethyl konjac glucomannan pellets in rats Preparation and in vitro release evaluation of pH-based and time-lag type pellets of emodin for colon-specific drug delivery Application of natural biodegradable polysaccharide in oral colon-specific drug delivery preparation Effect of pectins of different degree of esterification on in-vitro sophoridine release of hydrophilic matrix tablets containingtotal alkaloids of Sophora alopecuroides Study on release mechanism of berberine hydrochloride-loaded carboxymethyl konjac glucomannan pellets for colonic delivery Study on preparation of konjac glucomannan-hydroxypropyl methyl cellulose compression coated tablets for colonic delivery and in vitro release