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. 2014 May 21;15(5):9082–9102. doi: 10.3390/ijms15059082

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© 2014 by the authors; licensee MDPI, Basel, Switzerland

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 6. — Infrared absorption spectra: (A) Chitosan produced by microbiological R. arrhizus Assay 7; (B) Commercial chitosan (Sigma Aldrich Corp., St. Louis, MO, USA); (C) Chitin produced by microbiological R. arrhizus Assay 2; (D) Commercial chitin (Sigma).