title: Morphology of new zwitterionic copolymer matrices for sustained drug release.
authors.affiliation: Faculty of Pharmacy, Department of Pharmaceutical Technology and Biopharmacy, Medical University, 2 Dunav Str, 1000 Sofia, Bulgaria. bistrakostova@abv.bg
authors.forename: Bistra
authors.initials: B
authors.lastname: Kostova
authors.forename: Elena
authors.initials: E
authors.lastname: Kamenska
authors.forename: Nikola
authors.initials: N
authors.lastname: Dimitrov
authors.forename: Dimitar
authors.initials: D
authors.lastname: Rachev
authors.forename: George
authors.initials: G
authors.lastname: Georgiev
mesh_terms: D003692:Delayed-Action Preparations; D008689:Methacrylates / Q000008:administration & dosage*; D008790:Metoprolol / Q000008:administration & dosage; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D011145:Polyvinyls / Q000008:administration & dosage*; D000644:Quaternary Ammonium Compounds / Q000008:administration & dosage*; D014700:Verapamil / Q000008:administration & dosage
chemical_list: C530265:3-dimethyl(methacryloyloxyethyl)ammonium propane sulfonate; D003692:Delayed-Action Preparations; D008689:Methacrylates; D011145:Polyvinyls; D000644:Quaternary Ammonium Compounds; C013215:polyvinyl acetate; D014700:Verapamil; D008790:Metoprolol