Fig 8. MTT assay of a WB-F344 monolayer that was treated first with 20 pulses of 100 ns and 20 kV/cm and subsequently with 2-min PTM.

The picture was taken after an incubation time of 24 h. The area between the electrodes is clearly visible as a darker band in the middle of the well (white arrows point at previous electrode positions), indicating a stronger respiratory activity in this area.