Figure 6From: Differential Gene Expression to Investigate the Effects of Low-level Electrochemical Currents on Bacillus subtilis Effects of electrode material and medium composition on the biofilm cells under DC treatment. Biofilms were grown on graphite electrodes and treated with 500 μA DC current with and without 50 μg/mL ampicillin for 15 min at 37°C as indicated. Modified M56 buffer without chlorine was also tested as the electrolyte solution instead of NaCl buffer or LB medium.Back to article page