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OLS Field Name OLS Field Data
Main Title Development of Chicken Embryos in a Pulsed Magnetic Field.
Author Berman, E. ; Chacon, L. ; House, D. ; Koch, B. A. ; Koch, W. E. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. Reproductive Toxicology Branch. ;Centro Ramon y Cajal, Madrid (Spain). Dept. de Investigacion. ;North Carolina Univ. at Chapel Hill. ;Umea Univ. (Sweden). ;University of Western Ontario, London.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/287;
Stock Number PB91-145011
Additional Subjects Chickens ; Embryo ; Magnetic fields ; Eggs ; Morphology ; Incubators ; Abnormalities ; Reprints ; Helmholtz coil
Library Call Number Additional Info Location Last
NTIS  PB91-145011 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/13/1991
Collation 14p
Six independent experiments of common design were performed in laboratories in Canada, Spain, Sweden, and the United States of America. Fertilized eggs of domestic chickens were incubated as controls or in a pulsed magnetic field (PMF); embryos were then examined for developmental anomalies. Identical equipment in each laboratory consisted of two incubators, each containing a Helmholtz coil and electronic devices to develop, control, and monitor the pulsed field and to monitor temperature, relative humidity and vibrations. A unipolar, pulsed, magnetic field was applied to experimental eggs during 48 h of incubation. In each laboratory, ten eggs were simultaneously sham exposed in a control incubator (pulse generator not activated) while the PMF was applied to ten eggs in the other incubator. The procedure was repeated ten times in each laboratory, and incubators were alternately used as a control device or as an active source of the PMF. After a 48-h exposure, the eggs were evaluated for fertility. All embryos were then assayed in the blind for development, morphology, and stage of maturity. In five of six laboratories, more exposed embryos exhibited structural anomalies than did controls, although puntatively significant differences were observed in only two laboratories, and the significance of the difference in a third laboratory was only marginal.