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. 2016 Jun 20;27:126. doi: 10.1007/s10856-016-5740-3

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — a Compressibility of the different formulations before (grey) and after (black) sol–gel transition. Results are reported as mean ± SD (n = 3). One way ANOVA (α = 0.05) on the values after gelation returned P = 0.0131; Tukey’s multiple comparisons test: ^* P < 0.05, compared to chitosan; ^# P < 0.05 compared to CS-HACS. Water sorption and desorption isotherms of the freeze dried hydrogels: b chitosan; c CS-HACS-(NOSC-SWNTs); d CS-HACS-(NOSC-MWNTs). Data are presented as mean ± SD (n = 3)