Record Display for the EPA National Library Catalog

RECORD NUMBER: 29 OF 356

OLS Field Name OLS Field Data
Main Title Behavioral and Autonomic Thermoregulation in Mice Exposed to Microwave Radiation.
Author Gordon, C. J. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1983
Report Number EPA-600/J-83-179;
Stock Number PB84-172337
Additional Subjects Thermoregulation ; Microwaves ; Radiation effects ; Mice ; Laboratory animals ; Behavior ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB84-172337 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 9p
Abstract
Preferred ambient temperature (T) and breathing rate were measured in free-moving mice exposed to 2,450-MHz microwaves. A waveguide-exposure system was imposed with a longitudinal temperature gradient that permitted mice to select their preferred T. Breathing rate was determined by analyzing the rhythmic shifts in microwave energy not absorbed by the animal. Without microwave exposure mice selected an average T of 31 C. This preferred T did not change until the specific absorption rate (SAR) at 2,450 MHz exceeded approximately 7.0 W. per kg. Mice maintained their breathing rate near base-line levels by selecting a cooler T during microwave exposure. In contrast, mice maintained at 31 C underwent a sharp increase in breathing rate when SAR exceeded approximately 7.0 W. per kg. Mice exposed to microwaves in a waveguide with a temperature gradient increased breathing rate 0.6 breaths/min per unit increase in SAR, whereas without the temperature gradient breathing rate increased by 9.6 breaths/min per unit increase in SAR. Data from this study support previous studies that have shown behavioral thermoregulation is more effective (or efficient) in minimizing a thermal load than autonomic thermoregulation.