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. 2019 Jan 17;13:5. doi: 10.1186/s13036-018-0131-6

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© The Author(s). 2019

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. 9 — (a) Cell Surface modification of HeLa cell with silica nanocoating. (b) Protection of HeLa@SiO2 (silica coated) cells versus non-coated HeLa cells to enzymatic trypsin attack. (c) Survival ratio of HeLa@SiO2 cells versus uncoated HeLa cells when exposed to various PAH concentrations. Reproduced with permission from John Wiley and Sons [79]