Fig. 6From: Characterization of pH-responsive high molecular-weight chitosan/poly (vinyl alcohol) hydrogel prepared by gamma irradiation for localizing drug releaseScanning electron microscopy images of the crosslinked hydrogels: a pure PVA, b–d 25/75, 50/50, and 75/25 CS/PVA-based hydrogels crosslinked at 25 kGy, respectively; e, f 50/50 CS/PVA-based hydrogel crosslinked at 10 and 30 kGyBack to article page