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. 2015 Apr 16;13:31. doi: 10.1186/s40201-015-0183-1

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© Rezaei et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Response surface plot indicating the effects of interactions between a) pH and the enzyme activity, b) pH and the dye concentration, c) the enzyme activity and the dye concentration.