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. 2019 Oct 11;20(20):5056. doi: 10.3390/ijms20205056

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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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SEM images showing the morphology of PLA microfibers loaded with: (a) ACP, (b) ACP-CAM, (c) cHAp and (d) cHAp-CAM. Arrows point out the presence of nanoparticle agglomerates inside microfibers. In the middle column, higher magnification images are shown with aggregates of the nanoparticles inside the fibers. Image registered with the InLens detector (d, middle) that evidences the presence of nanoparticles as black spots (in this case the different phases of PLA matrix and the cHAp particles can be differentiated). The last column shows the distribution of the diameter of the fibers adjusted to a Gaussian model with the mean ± SE values.