Fig. 5.

(i) The magnitude of the mean electrocatalytic O₂ peak current difference obtained between the first and second cyclic voltammograms generated from solutions containing cells at 4 OD/mL at varying concentrations of ethanol (0, 2.5, 5, 10, or 12.5%, v/v) and 2 mM FcA. A cyclic voltammogram was recorded in the absence of E. coli which acted as a negative control (n=5, ±1 SE). (ii) The mean colony counts post-ethanol incubation of same batch of cells used in the cyclic voltammetry study (n=14–16, ±1 SE). (iii) The mean optical density measured by UV spectrophotometer at 600 nm post-ethanol incubation of the same batch of cells used for cyclic voltammetry studies and agar plate bacterial growth assay (n=5, ±1 SE).