Temperature Cycling in Rats Exposed Repetitively to Radiofrequency Radiation.
Final rept. 1 Sep 80-31 Aug 81,
TECHNOLOGY INC SAN ANTONIO TX LIFE SCIENCES DIV
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A series of temperature cycling experiments during radiofrequency radiation RFR exposure of rats was performed. This type of exposure procedure permits electromagnetic energy to be introduced into biological systems while the systems are maintained at physiologically acceptable temperatures. Experiments were carried out at various average power densities 50-200 mWsq cm, using continuous wave CW and pulsed radiation while the carrier frequency was maintained at 2.06 GHz. Single-day RFR exposures produced no observable effect on temperature regulation of rats in terms of heat-dissipation efficiency. Repeated exposure of rats during several months revealed that the heat-dissipation time D gradually increased, indicating reduced efficiency. After a prolonged resting period, however, the rats ability to dissipate heat showed considerable improvement. No significant difference in thermoregulation was observed when CW and pulsed RFR exposures at pulse durations of 1-10 ms were compared. Author