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. 2019 Nov 7;12(22):3659. doi: 10.3390/ma12223659

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© 2019 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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(a) SEM images of PLA and PLA/TiO₂-2, PLA/TiO₂-5, and PLA/TiO₂-8 composites after 20 days incubation time and (b) the percentage of biodegradation with respect to incubation time for pure PLA and PLA/TiO₂ composites [59].