Fig. 4

Viable cell counts as colony-forming units (CFU) from dissolved alginate beads after 0, 24, and 48 h. Highest CFU was observed for normoxic beads supplemented with NO3−. No change in CFU over time for the anoxic group was observed. Bars represent average ± standard errors of the means from three replicates. Significant differences as indicated. n.s. not significant; ****p ≤ 0.0001