Figure 1

Microbial EET recorded by the potential-poised electrodes in the presence of phenothiazine (a); plot of the maximum current densities of the three phenothiazine derivatives vs. their respective redox potentials (b).
Microbial EET recorded by the potential-poised electrodes in the presence of phenothiazine (a); plot of the maximum current densities of the three phenothiazine derivatives vs. their respective redox potentials (b).