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. 2021 Oct 6;14(19):5851. doi: 10.3390/ma14195851

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© 2021 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 (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(a) Photograph of composite films; (b) Optical transmittance of composite films with different chitosan, chitosan/DANC, and chitosan/CNC films; (c) Optical transmittance of composite films at 500 nm.