Preparation of harmine hydrochloride liposome by active loading method Preparation and characterization of niosomes of Semen Strychni alkaloids extract Prescription optimization of vinblastine hydrophilic group-modified cationic liposomes by central composite design-response surface method Preparation technology of sinomenine hydrochloride liposomes Prescription optimization of vinblastine hydrophilic group-modified cationic liposomes by central composite design-response surface method