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. 2017 Aug 1;14:28. doi: 10.1186/s12989-017-0209-1

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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. 1 — Cytotoxicity of CuO NP, CuO MP and CuCl₂ . Cytotoxicity was determined via cell number after 24 h treatment with the different copper compounds in BEAS-2B cells. Shown are mean values of six determinations derived from three independent experiments ± SD. Statistically significant different from control: *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001 (ANOVA-Dunnett’s T test)