Main Title |
Distinction Between Heating Rate and Total Heat Absorption in the Microwave-Exposed Mouse. |
Author |
Gordon, Christopher J. ;
White, Elizabeth C. ;
|
CORP Author |
Health Effects Research Lab., Research Triangle Park, NC. |
Year Published |
1982 |
Report Number |
EPA-600/J-82-003; |
Stock Number |
PB83-231407 |
Additional Subjects |
Heat of absorption ;
Microwaves ;
Radiation effects ;
Mice ;
Reprints ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB83-231407 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
11p |
Abstract |
This investigation assesses the ability of the heat-dissipating system of the mouse to respond to equivalent heat loads (e.g., J/g) administered at varying intensities (e.g., J/g/s or W/kg). Use of a microwave exposure system provided a means to administer exact amounts of energy at varying rates in awake, free-moving mice. Male AJ mice were administered average heat loads of 12-13 J/g at rates of 19, 68, or 194 W/kg by exposure to 2,450 MHz microwave radiation while evaporative heat loss (EHL) was continuously monitored with dew-point hygrometry. The sensitivity of the EHL response was calculated as the heat dissipated by evaporation in response to microwave exposure divided by the heat absorbed. This ratio yields a dimensionless number that is related to the sensitivity of the EHL response and, in this study, is defined as the open loop gain (OLG) of EHL (i.e., motor response/error signal). When mice were exposed at an ambient temperature of 32.5 C to a specific absorption rate (SAR) of 19 W/kg, the OLG averaged 0.17; thus 17% of the absorbed heat was dissipated by EHL and the remaining 83% of the energy was passively dissipated. |
Supplementary Notes |
Pub. in Physiological Zoology, v55 n3 p300-308 1982. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Distinction Between Heating Rate and Total Heat Absorption in the Microwave-Exposed Mouse. |
PUB Date Free Form |
1982 |
Category Codes |
6R; 57V |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/11 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
328722351 |
Origin |
NTIS |
Type |
CAT |