Figure 7

Normalized concentrations of urea in time for experiments with (a) varying SO42− and ASW concentrations and no added Ca2+ and (b) varying Mg2+ and ASW concentrations with minimal added Ca2+. All experiments included the addition of 250 mM urea, 0 mM or 10 mM Ca2+, S. pasteurii cells at 6.6 × 107 cells/mL, and varying SO42−, Mg2+, or ASW additions.