Main Title |
Fetal and Maternal Effects of Continual Exposure of Rats to 970-MHz Circularly-Polarized Microwaves. |
Author |
Berman, E. ;
Weil, C. ;
Phillips, P. A. ;
Carter, H. B. ;
House, D. E. ;
|
CORP Author |
Health Effects Research Lab., Research Triangle Park, NC. Developmental Toxicology Div. ;National Inst. of Standards and Technology, Boulder, CO. ;ManTech Environmental Technology, Inc., Research Triangle Park, NC. |
Publisher |
c1992 |
Year Published |
1992 |
Report Number |
EPA/600/J-92/319; |
Stock Number |
PB92-227602 |
Additional Subjects |
Microwaves ;
Fetus ;
Mothers ;
Exposure ;
Rats ;
Dose-response relationships ;
Body weight ;
Reproduction ;
Reprints ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB92-227602 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
14p |
Abstract |
Virtually continual exposure to970-MHz microwaves in circularly-polarized waveguides was used to elicit fetal responses in Sprague-Dawley rats during gestation. Two hundred fifty rats were exposed to microwave radiation at whole-body averaged specific absorption rates (SAR) of 0.07, 2.4, or 4.8 W/kg, or concurrently shamirradiated for 22 h/day from the 1st through the 19th day of gestation. At SAR of 4.8 W/kg, only fetal body weight was significantly altered (-12%, P=.012). Two of twelve rats died during the exposure at SAR of 4.8 W/kg. Bred, but non-pregnant, rats that were exposed at SAR of 4.8 W/kg had significantly lower body weight gain than sham-irradiated rats; similar lower gain is assumed to have occurred in the pregnant rats exposed at SAR of 4.8 W/kg, and whose fetuses were significantly smaller. The authors conclude that continual gestational exposure at SAR of 4.8 (but not 2.4 or lower) W/kg induces fetal alterations. Apparently, deleterious maternal effects are associated with these fetal changes. Although colonic temperature was not measured in these rats, it is expected that exposure at 4.8 W/kg was hyperthermal. |
Supplementary Notes |
Pub. in Electro- and Magnetobiology, v11 n1 p43-54 1992. Prepared in cooperation with National Inst. of Standards and Technology, Boulder, CO., and ManTech Environmental Technology, Inc., Research Triangle Park, NC. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Fetal and Maternal Effects of Continual Exposure of Rats to 970-MHz Circularly-Polarized Microwaves. |
Category Codes |
57V; 57S |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/10 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
231126091 |
Origin |
NTIS |
Type |
CAT |