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. 2017 Jan 5;15:4. doi: 10.1186/s12951-016-0243-4

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 6 — Optical micrographs of the mice skin and comparison of the GPx (i) and LF levels (j) after UV-radiation. a–d skin surface; e–h skin cross section. a, e unirradiated group; b, f UV-irradiated and treated with blank lotion; c, g UV-irradiated and treated with the CS-SeNPs; and d, h UV-irradiated and treated with H₂SeO₃. H&E stain, 400× magnification, the thickness of the granular layers is marked with the double-headed arrows. The different letter markers denote the significant mean difference at p < 0.05