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. 2020 Nov 3;5(45):29520–29529. doi: 10.1021/acsomega.0c04470

Figure 1.

Figure 1

Variation of the signal areas of the 13C CP-MAS-NMR spectra corresponding to O–C–O, CH2, C=O, and C=C groups (a) and basicity of the parent chitosan and HTC samples, as measured with a diluted HCl solution (b).