Transient Effects of Low Level Microwave Irradiation on Bioelectric Muscle Cells Properties and on Water Permeability and Its Distribution.
CONSEJO NACIONAL DE INVESTIGACIONES CIENTIFICAS Y TECNICAS BUENOS AIRES (ARGENTINA)
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Microwave radiation effects on passive and dynamic electrical properties and on cell water parameters were studied in sartorius muscle cells from the South American frog Leptodactilus ocellatus. Microwave exposure of 10 mWsq cm for 120 minutes produced transient changes on specific membrane resistance, the membrane capacitance and the space constant. Those electrical parameters related to the excitation and propagation of the action potential, i.e. the rate constant, the maximum rate of rise and fall of the action potential, the limiting membrane conductances, the peaks of sodium in ward and potassium outward ionic currents, the net ionic charge accumulation action potential and the propagation velocity of the action potential, were all transiently altered. Water membrane permeability and the fraction of the cell volume which is osmotically available were also transiently altered. Analysis of these parameters shows that the transient changes evoked by microwave radiation are higher in muscle cells from winter frogs than from summer frogs recovering their initial control values within approximately 20 and 3 minutes, respectively. It was concluded that microwave exposure to 10 mWsq cm did not produce permanent effects on electrical and cell water parameters.
- Anatomy and Physiology