Fig. 7From: Characterization of pH-responsive high molecular-weight chitosan/poly (vinyl alcohol) hydrogel prepared by gamma irradiation for localizing drug releasea Calibration curve for Amoxicillin using UV-vis spectroscopy, b cumulative release of the 50/50 CS/PVA; the drug release profiles of CS/PVA 50/50 were calculated using the c zero-order, d first-order, e Hixson-Crowell model, f Higuchi model, and g Korsmeyer-Peppas modelBack to article page