Microwave attenuation of ethanol-induced hypothermia: ethanol tolerance, time course, exposure duration, and dose response studies

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Bioelectromagnetics (N.Y.); (United States)

DOI:https://doi.org/10.1002/bem.2250090106· OSTI ID:5230291

Hjeresen, D L; Francendese, A; O'Donnell, J M

Four experiments were conducted to quantify the reported attenuation by microwave (MW) irradiation of ethanol-induced hypothermia. In one experiment rats were irradiated (continuous wave 2.45 GHz, specific absorption rate = 0.3 W/kg) or sham irradiated for 45 min, injected with 3.6 g/kg, 20% (v/v) ethanol (EtOH) or saline (NaCl) i.p.. Colonic temperature was monitored at 20-min intervals for 2 h. This procedure was repeated for 8 days to determine the rate of tolerance development to the hypothermic effect of ethanol. While MW irradiation did significantly attenuate EtOH-induced hypothermia, it did not enhance or retard the rate of tolerance development. To determine the duration of irradiation necessary to attenuate EtOH-induced hypothermia, groups of rats were irradiated or sham irradiated for 5, 15, 30, or 60 min prior to EtOH injection and subsequent temperature measurements. The attenuation was apparent only after 60 min of irradiation. To determine the duration of the attenuation effect after irradiation, rats were injected with EtOH or NaCl at 0, 30, 60, 120, or 480 min after 45 min of irradiation or sham irradiation. The attenuation effect was apparent among rats injected 0 to 30 min after irradiation and for the first 40 min for groups injected at 120 min. Additional rats were injected with NaCl or 0.9, 1.8, or 2.7 g/kg of EtOH i.p. following 45 min of irradiation or sham irradiation to determine if the attenuation effect depends on the dose of EtOH administered. Attenuation of EtOH-induced hypothermia was more apparent at lower doses of EtOH than at higher doses. These results indicate that the effect is an acute response to irradiation, and rule out several other potential explanations.

• Research Organization: Los Alamos National Lab., NM (USA)
• OSTI ID: 5230291
• Journal Information: Bioelectromagnetics (N.Y.); (United States), Journal Name: Bioelectromagnetics (N.Y.); (United States) Vol. 9:1; ISSN BLCTD
• Country of Publication: United States
• Language: English

Related Subjects

560300 -- Chemicals Metabolism & Toxicology
560400* -- Other Environmental Pollutant Effects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALCOHOLS
ANIMALS
BIOLOGICAL EFFECTS
BODY TEMPERATURE
DOSE-RESPONSE RELATIONSHIPS
ELECTROMAGNETIC RADIATION
ENERGY
ETHANOL
HEAT
HYDROXY COMPOUNDS
HYPOTHERMIA
MAMMALS
MICROWAVE RADIATION
ORGANIC COMPOUNDS
RADIATIONS
RATS
RODENTS
VERTEBRATES