Record Display for the EPA National Library Catalog

RECORD NUMBER: 125 OF 211

OLS Field Name OLS Field Data
Main Title Measurement of Ventilatory Frequency in Unrestrained Rodents Using Microwave Radiation.
Author Gordon, C. J. ; Ali, J. S. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA/600/J-84/176;
Stock Number PB85-147205
Additional Subjects Microwaves ; Radiation effects ; Ventilation ; Respiration ; Laboratory animals ; Mice ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB85-147205 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 10p
Abstract
A novel technique for remote determination of breathing frequency in unrestrained rodents using microwave radiation is described. Single mice were placed inside a rectangular waveguide operating at 2450 MHz. Because mice efficiently absorb radio frequency energy at 2450 MHz, any change in their absorption, as occurs rhythmically with breathing, can be detected by monitoring the changes in power transmitted through the waveguide. When the volume of the mouse increases during inspiration, transmitted power through the waveguide momentarily decreases - during expiration the reverse takes place.