Journal of Microwave Power and Electromagnetic Energy (JMPEE)
TITLE	Thermal and Athermal Effects of 2.8 GHz Microwaves on Three Human Serum Enzymes [PDF]
AUTHORS	M. L. Belkhode, A. M. Muc and D. L. Johnson 1974 9 1 23-30
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Abstract This report presents the results of an investigation of the effects of microwave radiation in vitro on the human serum enzyme lactate dehydrogenase, acid phosphatase and alkaline phosphatase. Serum specimens were treated with 2.8 GHz microwaves (1 kHz square wave modulation) at an incident power density of between 400 mW/cm² and 1000 mW/cm². Treatments with and without microwaves were carried out in a heat exchanger at fixed temperatures of 37°C, 46.7°C and 49.7°C for 4½ min or 18½ min. periods. Enzyme activities were determined and analyzed for the possible thermal or athermal effects of the microwave radiation. Evaluation of the data demonstrated thermally induced inactivation of all three enzymes but no athermal effects were apparent.