Figure 4

Proliferation of Escherichia coli in droplets. The time-series micrographs of 24 droplets at 0, 8, 16, and 24 hours. The dark clusters in the droplets are E. coli colonies. For all four panels, the nominal cell numbers of the five rows are 10⁴, 10³, 10², 10, and 1 cell(s) per droplet, respectively.