NTRS - NASA Technical Reports Server

Back to Results
Relative biological effectiveness of fast neutrons compared with X-rays: Prenatal mortality in the mouseThe effects of fission neutrons and of X-rays on the mouse zygote are discussed. Seven-week-old virgin mice were allowed a 12-hour mating opportunity beginning at 7:00 P.M. Between 1:30 and 4:00 P.M., except where indicated otherwise, the females which had mated (vaginal plug) during the night were either irradiated or sham-irradiated. At the time of irradiation the zygotes were in a pronuclear stage. Sixteen days later the mice were killed and the uteri dissected. The number of dead embryos, live embryos, and gross anomalies were determined. Dead embryos were classified as to stage of development.
Document ID
Document Type
Conference Paper
Friedberg, W. (Civil Aeromedical Inst. Oklahoma City, OK, United States)
Hanneman, G. D. (Civil Aeromedical Inst. Oklahoma City, OK, United States)
Faulkner, D. N. (Civil Aeromedical Inst. Oklahoma City, OK, United States)
Darden, E. B., Jr. (ORNL)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Publication Information
Publication: NASA, Washington Proc. of the Natl. Symp. on Nat. and Manmade Radiation in Space
Subject Category
Distribution Limits
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19720010035.pdf STI

Related Records

IDRelationTitle19720009951Analytic PrimaryProceedings of the National Symposium on Natural and Manmade Radiation in Space