Effects of preparation methods and technologies on in vitro characteristics of curcumin-phospholipid complex-chitosan microspheres In vivo pharmacokinetics of curcumin-phospholipid complex-chitosan microspheres in rats Effects of preparation methods and technologies on in vitro characteristics of curcumin-phospholipid complex-chitosan microspheres Preparation of ligustrazine-chitosan microspheres by spray drying method Study on rat small intestinal absorption features of puerarin loaded O-carboxymethyl chitosan microspheres based on single pass perfusion method