High-power pulsed microwave radiation, when applied to solutions containing
dissolved carbon dioxide (or bicarbonate), hydrogen peroxide, and the solu
ble organic semi-conductor diazoluminomelanin, generates sound, pulsed lumi
nescence, and electrical discharge. Microbes exposed to these phenomena exp
erienced damage comparable to short-time, high-temperature insults, even th
ough the average and measurable localized temperatures were insufficient to
cause the observed effects.