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. 2018 Aug 30;13:4881–4894. doi: 10.2147/IJN.S172230

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© 2018 Heise et al. This work is published and licensed by Dove Medical Press Limited

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Normalized Fourier transform Raman spectra of a) chitosan, b) SECS_VS (DS_SE 0.69), and c) SECS_BES (DS_SE 1.03).

Abbreviations: DS_SE, degrees of substitution with sulfoethyl groups; SECS_VS or SECS_BES, sulfoethyl chitosan synthesized with sodium vinyl sulfonate or sodium 2-bromoethanesulfonate.