title: Carboxymethyl cellulose (CMC) based semi-IPNs as carriers for controlled release of ciprofloxacine: an in-vitro dynamic study.
abstract: Semi-interpenetrating polymer networks (IPNs) of carboxymethyl cellulose (CMC) and polyacrylic acid were prepared and its potential for controlled release of ciprofloxacine (Cfx) was assessed. The IPNs were characterized by IR spectral analysis and Environmental scanning electron microscopy (ESEM). The entrapped drug was examined for its antibacterial activity and chemical stability. The effects of experimental parameters such as varying chemical composition of the IPNs, percent loading of Cfx, pH and temperature of release medium and presence of salt ions in outer solution were examined on the release profile of the drug. On the basis of Fick's power law equations, the diffusion exponents (n) and diffusion constant (D) were evaluated for different IPNs compositions. From the kinetic parameter data, an attempt was made to resolve the mechanism of the release process of Cfx.
authors.affiliation: Bose Memorial Research Laboratory, Department of Chemistry, Government Autonomous Science College, Jabalpur, MP 482 001, India. akbmrl@yahoo.co.in
authors.forename: A K
authors.initials: AK
authors.lastname: Bajpai
authors.forename: Abhilasha
authors.initials: A
authors.lastname: Mishra
mesh_terms: D000180:Acrylic Resins / Q000494:pharmacology; D002266:Carboxymethylcellulose Sodium / Q000494:pharmacology*; D002939:Ciprofloxacin / Q000008:administration & dosage*; D003432:Cross-Linking Reagents / Q000494:pharmacology; D004058:Diffusion; D004305:Dose-Response Relationship, Drug; D004337:Drug Carriers; D016503:Drug Delivery Systems; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D019384:Nucleic Acid Synthesis Inhibitors / Q000008:administration & dosage*; D011108:Polymers / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature
chemical_list: D000180:Acrylic Resins; D003432:Cross-Linking Reagents; D004337:Drug Carriers; D019384:Nucleic Acid Synthesis Inhibitors; D011108:Polymers; C006903:carbopol 940; D002939:Ciprofloxacin; D002266:Carboxymethylcellulose Sodium