Date of download: 11/3/2017 Copyright © ASME. All rights reserved. From: Ultraviolet-Crosslinkable and Injectable Chitosan/Hydroxyapatite Hybrid Hydrogel for Critical Size Calvarial Defect Repair In Vivo J. Nanotechnol. Eng. Med. 2016;6(4):041001-041001-6. doi:10.1115/1.4032902 Figure Legend: Synthesis, characterization, and property of UV-crosslinkable and injectable N-MAC. (a) The N-acylation scheme between chitosan and MA; (b) 1H NMR spectra (400 MHz, D2O) of N-MAC; (c) FTIR spectra of chitosan, N-MAC, and N-MAC/HA; (d) photos of N-MAC solution in inclined vial (up); N-MAC solution could form hydrogel that exhibited fixed shape, respectively, in inverted vial (down) after UV irradiation; (e) SRs of N-MAC hydrogel with DS of 28.4%; ESEM photograph of N-MAC hydrogel; (f) the XRD patterns of chitosan, N-MAC and N-MAC/HA. (g) Degradation of N-MAC and N-MAC/HA hydrogels in PBS containing 1 mg/mL papain at 37 °C.