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. 2017 Jul 26;7:6631. doi: 10.1038/s41598-017-06884-8

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Effect of UVB dosage on UV film transmittance. Average DNA film transmittance, τ, in the (a) UVA range (315–400 nm), (b) UVB range (280–315 nm) and (c) UVC range (200–280 nm) prior to UVB exposure (open bar) and after UVB irradiation with dosages of 80, 160 and 320 J/cm² (respectively denoted by increasingly dark bar colors). Error bars denote standard deviations of n = 3 individual films.