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. 2016 Mar 31;7:423. doi: 10.3389/fmicb.2016.00423

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Copyright © 2016 Parrello, Zegeye, Mustin and Billard.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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P. aeruginosa-promoted Fe dissolution from silica gel-embedded nontronites in a system where NAu-1 to NAu-2 ratios are varied across a range of particle concentration, after 24 h of incubation. (A) Fe dissolution for a constant NAu-1 to NAu-2 ratio ([NAu-1]/([NAu-1] + [NAu-2]) = 0) while the particle concentration varied. (B) Fe dissolution for a constant particle concentration (3.3 g L⁻¹) with different NAu-1 to NAu-2 ratios. The symbols represent soluble Fe (squares), KCl extracted Fe (circles), hydroxylamine-KCl extracted Fe (triangles) and the sum of the three above Fe concentrations (stars). Error bars indicate the standard error of the mean (n = 2 for soluble Fe; n = 3 for KCl- and hydroxylamine-KCl extracted Fe).