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. 2021 Jun 10;13(12):1938. doi: 10.3390/polym13121938

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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) The layer-by-layer method design on bacterial microcapsules via coatings [50], (b) Ionic interaction between chitosan and alginate [83].