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. 2022 Mar 6;14(5):1048. doi: 10.3390/polym14051048

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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Graphical representation of the reduction in the intensity of the photons as a function of the thickness for (a) SR-5m, (b) SR-5n, (c) SR-30m and (d) SR-30n.