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. 2017 Oct 30;14:42. doi: 10.1186/s12989-017-0223-3

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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. 7 — Transmission electron micrographs of lavaged cells at 24 h from rats instilled with Au NP suspensions at a dose of 1 mg/kg body weight. a Macrophage uptake of citrate-coated Au NPs and b albumin-coated Au NPs. Micrographs in 6A and 6B insets are higher magnification of the areas shown. c Morphometric analysis of NP uptake. Macrophage uptake was scored similarly as described in Fig. 3. No significant difference in macrophage uptake of NPs (n = 185, citrate-coated Au NPs, n = 191, albumin-coated Au NPs) was found. Data are mean ± SE of % of macrophages (n = 3 rats per NP)