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. 2020 Nov 24;12(12):2779. doi: 10.3390/polym12122779

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© 2020 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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Influence of the chitosan concentration on the specific surface area for different drying methods. The shape of the symbol represents the drying method: square for ambient drying, circle for drying at 65 °C, triangle for drying under supercritical conditions and diamond for freeze drying. Ref A: [273], Ref B: [283], Ref C: [284], Ref D: [282], Ref E: [285], Ref F: [286], Ref G: [287], Ref H: [288], Ref I: [289], Ref J: [237], Ref K: [290], Ref L: [291], Ref M: [292], Ref N: [293], Ref O: [277], Ref P: [275], Ref Q: [274], Ref R: [276], Ref S: [278], Ref T: [279], Ref U: [280], Ref V: [294], Ref W: [295], Ref X: [281], Ref Y: [296].