FIG. 3.

Cyclic voltammograms of electrocatalytic oxidation of 10 mM glucose with different carbon felt electrodes (A) before (black) and 3 (green line), 13 (blue line), and 28 days (red line) after the inoculation of Acidiphilium sp. strain 3.2 Sup 5 into the electrochemical cell or (B) 23 days after the inoculation of Acidiphilium sp. strain 3.2 Sup 5 cells into the electrochemical cell (red line) and then put into a new solution without Acidiphilium sp. cells (green line). (C) Carbon felt electrode modified with Acidiphilium sp. strain 3.2 Sup 5 cells in the presence of 6.2 ppm O₂ in solution (black line), after 20 min of being bubbled with pure N₂ (red line), and 4 (blue line) or 6 h (green line) after the addition of 5% phenol to the electrochemical cell.