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. 2015 Feb 12;29(2):381–389. doi: 10.1080/13102818.2015.1006905

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© 2015 The Author(s). Published by Taylor & Francis.

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 cited.

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Figure 1. — Biomass and surfactin production in media with different concentrations of Mn²⁺. Note: Biomass concentration (a); surfactin concentration (b).