In vitro characteristic evaluation of ursolic acid co-crystal solid dispersions Evaluation on preparation process of baicalin-Eudragit L100-55 enteric coated solid dispersion and its in vitro release Preparation technology of chrysophanol freeze-dried liposomes Preparation of astragalus polvsaccharides-Eudragit S100 colon-specific spray drying powder and evaluation on its in vitro release Determination of percutaneous absorption characteristics of Panax notoginseng saponins transfersomes by in vitro skin permeation method