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. 2016 Dec 2;8(12):418. doi: 10.3390/polym8120418

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© 2016 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 (http://creativecommons.org/licenses/by/4.0/).

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The images of the dried initial and modified PLA surfaces obtained by optical microscopy: (A–C) PLA, PLA-PAAm, and PLA-Alg in transmitted light, respectively; (D–F) PLA, PLA-PAAm, and PLA-Alg in reflected light, respectively.