Apple, banana and carrot disks were blotted using a paper tissue
and placed at the bottom of a cylindrical device (3 cm
diameter) between two electrodes. The electrodes were connected
to a PEF generator (1500 V–20 A, Electronic Department
of UTC, France) as shown in Fig. 1a. The disks were
placed on a fixed electrode and covered by a mobile electrode,
of 2.9 cm each in diameter. The mobile electrode was adjusted
on the top of the disk surface in order to ensure a good electrical
food-electrode contact. The experimental setup consisted in
applying for apple disk a field strength intensity of 0.90 kV/cm
for a constant time tPEF =0.75 s (750 rectangular monopolar
pulses, each of 100 ls duration), for banana disk and carrot
disk 0.30 kV/cm and 0.60 kV/cm respectively for tPEF = 0.05 s
(500 rectangular monopolar pulses, each of 100 ls duration).