>- electroporation does occur with the higher voltage zappers.
Yes, being trained as a biomedical engineer, I am well aware of the required voltages per square cm that are required for electroporation. Applying the output of the UZ through the tip of a needle could possibly achieve this level but would be painful and would leave damaged and dead tissue in its path if used more than a few microseconds.
There are other electro-transport conditions that apply to zappers, but technically, zappers do not cause electroporation and to claim so is to be mis-informed to say the least. If this were the case, I would be claiming it as I have produced zappers that produce over 18 volts p-p.