1) To study if microwave treatment can successfully warm the immature rat (6-7 days of age) at cold ambient temperature (approximately 25°C) and 2) to assess both the thermal and metabolic consequences of such exposure.
|power density||50 W/m²||unspecified||measured||-||-|
|power density||200 W/m²||unspecified||measured||-||-|
Colonic temperature increased significantly above initial level at both power densities and reached a plateau after 45 min of microwave irradiation. Colonic temperature doubled with a four-fold increase in microwave intensity. Prior to irradiation, metabolic heat production was elevated in response to cold ambient temperature and remained unchanged during exposure at 5 mW/cm², but decreased during exposure at 20 mW/cm². The data indicate that the hypothermic rat pup can be effectively warmed by low-level microwave irradiation and is capable of altering metabolism in response to such heating.