ID Number		871
Study Type		In Vivo
Model		2.88 GHz (PW) exposure to rats and analysis of tissue properties
Details		Wistar rats (males, n=80) were exposed to 2.88 GHz (PW-modulated at 1 kHz, 1.5 usec pulse width) for between 15 and 60 minutes at SARs ranging from 4-12 W/kg. Non-RF heating at 40 degrees served as a positive control. At SARs of 4 W/kg and above, core body temperatures were significantly elevated. Submaxillary water and conductivity, however, increased at SAR values of 6 W/kg and greater in a dose dependent fashion. Similar changes, although not as acute, were observed in kidney tissue but not in muscle, pancreas, skin, brain, and testes tissues. Microwave exposure caused a greater increase in in Submaxillary gland tissue water content that conventional heat. Further, conventional heat decreased, while MW exposure increased, submaxillary gland tissue conductivity. The authors conclude that submaxillary gland water and conductivity can be used as a specific test to distinguish between conventional and MW induced thermal responses.
Findings		Effects
Status		Completed With Publication
Principal Investigator		Inst Occupational Med, Poland
Funding Agency		Private/Instit.
Country		POLAND
References		Mikolajczyk, H Bioelectromagnetics, (1981) 2:51-60 Mikolajczyk, HJ BIOLOGIC EFFECTS AND HEALTH HAZARDS OF MICROWAVE RADIATION, (1974) :46-51 Mikolajczyk, HJ BIOLOGICAL EFFECTS OF ELECTROMAGNETIC WAVES. U.S. Department of Health, Education and Welfare. , (1976) 1:377-383
Comments		The study does offer modest evidence that, at least for tissue water and conductivity values, significant effects are seen only after thermal levels of exposure. It is very difficult to compare the differences between the 40 degree non-MW heat positive control and the MW exposed rats, however, as local tissue temperatures associated with MW exposure were not well characterized.