The device for exposure of the cells to PEF.

<p>(A) The cells treated with or without EGCG were placed between two thin copper flat and parallel electrodes (18 cm long at 3.5 cm distance). Electric fields of 15, 30, 60, and 90 V/cm were applied. (B) Separated by an insulating container and an air gap, the cells did not directly contact with the electrodes. (C) The waveform of 60 V/cm PEF was recorded using an oscilloscope.