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. 2020 Jun 22;22(1):24–56. doi: 10.1021/acs.biomac.0c00663

Figure 5.

Figure 5

Average compressive modulus of hydrogels composed of N-isopropylacrylamide and chitosan or chitosan–N-acetylcysteine calculated from the slope of the stress–strain curve in a range of 10–20% strain (toe region). NC = N-isopropylacrylamide-g-chitosan copolymer; TNC = thiol-modified N-isopropylacrylamide-g-chitosan with different amounts of free thiol groups (TNC50: 101.84 ± 18.35 μmol/g, TNC100: 141.91 ± 27.15 μmol/g, TNC200: 299.39 ± 8.11 μmol/g). Significantly higher moduli were observed for TNC100 as well as TNC200 compared to NC and TNC50 (p < 0.05). Indicated values are means (n = 3) ± SD. Reprinted with permission from ref (138). Copyright 2018 Elsevier.