Figure 1From: Differential Gene Expression to Investigate the Effects of Low-level Electrochemical Currents on Bacillus subtilis Schematic of the electrochemical cell used in this study. The reference electrode is Ag/AgCl wire inserted in a thin glass tube to prevent contact with the working or counter electrode. Biofilms grown on flat steel or carbon electrodes can be clipped onto the side; the liquid level is about 1 cm below the top of the cuvette when full (3 mL).Back to article page