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. 2020 Dec 15;8(12):616. doi: 10.3390/biomedicines8120616

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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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XRD spectra (A, upper panel) and SEM images (B, lower panel) of composites before (=day 0) and after immersion in SBF solution for 14 days. Apatite formation was confirmed for all the tested specimens by both XRD that showed typical apatite peaks and SEM whose images demonstrated the presence of crystals aggregates (indicated by the red arrows). SEM magnifications: 15,000× (before immersion) and 20,000× (after immersion), bar scale = 2 μm. a: BG-Cn-GPTMS10, b: BG-Cn-GPTMS20, c: BG-Gel-GPTMS10, d: BG-Gel-GPTMS20, e: BG-Cn-Gel-GPTMS10, f: BG-Cn-Gel-GPTMS20. BG=Bioactive glass, Cn=chitosan, Gel=gelatin.