抄録
This paper reviews the effects of electromagnetic fields, from DC to microwaves, on biological systems. Electrical properties of biological substances are briefly described. At DC, strong magnetic fields and steady DC electric fields are reported to produce several effects. At low frequencies, interest of many researchers is centered around stimulation, involuntary movements and shock hazards. produced by currents flowing through the body. Results of several experimental studies are cited. With shifts to higher frequencies, there seem to arise several points which need further clarification. At ultra-high and microwave frequencies, situations are quite different. Most of the effects produced are usually considered attributable to heat developed by electromagnetic energy dissipation, although several papers point out non-thermal effects. Calculations by electromagnetic theory and some experimental results are described. It is emphasized that several points need urgent solution.
