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. 2019 Feb 27;10:360. doi: 10.3389/fmicb.2019.00360

FIGURE 4.

FIGURE 4

Effects of nitrate on bacterial anaerobic Fe(II) oxidation. (A) Fe(II) oxidation profiles of Sinorhizobium sp. GW3 with 1 mM Fe(II) and different concentrations of nitrate under anoxic conditions. No inoculum was added to the sterile control. (B) Nitrite formation by strain GW3 during the anaerobic Fe(II) oxidation process. Error bars represent standard deviations of the means from three independent experiments.