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RBE of Monoenergetic Fast Neutrons: Cytogenetic Effects in Maize

Description: Investigations on the relative biological effectiveness (RBE) of densely ionizing radiations (with high LET, rate of linear energy transfer) are of importance in both fundamental and applied radiobiology. In the latter, they serve as a basis in setting permissible exposure levels for types of radiation about which little long range experience is available. Some of the best RBE studies have been done on chromosomal aberrations. The difficulty is determining RBE on the basis of chromosomal exchan… more
Date: November 13, 1963
Creator: Smith, H. H.; Bateman, J. L.; Quastler, H. & Rossi, H. H.
Item Type: Refine your search to only Report
open access

Reutilization of DNA-Thymine, and Conversion of RNA-Pyrimidines for DNA-Thymine, in Normal Rat Bone Marrow Studies with Tritiated Nucleosides

Description: If one injects into an animal H3-thymidine, 50% of it is incorporated into deoxyribonucleic acid (DNA), within approximately 30 to 45 minutes, while the rest is catabolized. A storage of H3-thymidine for later incorporation into DNA does not occur, on the basis of available evidence. Once incorporated, the label remains bound to DNA until cell death and no unequivocal evidence has as yet been presented to indicate metabolic renewal or intracellular turnover of the DNA molecule. The loss of labe… more
Date: November 13, 1963
Creator: Feinendegen, L. E.; Bond, V. P.; Cronkite, E. P. & Hughes, W. L.
Item Type: Refine your search to only Report
open access

Stratospheric Monitoring Program

Description: "Design work was completed and construction initiated on a prototype field altimeter based on the gas density dependence of Townsend discharge current in an electrical discharge. The design of an ion tracer air velocity meter for laboratory applications, and construction of three units were successfully completed. Theoretical and experimental support is presented, showing the applicability of the ion tracer system to the accurate measurement of linear gas velocity. The operating range of the la… more
Date: January 13, 1963
Creator: Cravitt, S.; Lilienfeld, P. & Foldes, A.
Item Type: Refine your search to only Report
open access

Use of Neutron Irradiations in the Brookhaven Mutations Program

Description: In brief, these facilities consist of a 250 KvP X-ray generator; two areas of a research reactor, one a well thermalized unit of moderate capacity and a larger area with a mixed thermal and fast neutron distribution, all of which are used for brief, acute exposure. A 10 acre field, currently with almost 4000 curies of cobalt 60, serves to irradiate entire plants for either short or long periods of time. Recently, the flux density of the thermal column was increased by a factor of 5 over the ori… more
Date: November 13, 1963
Creator: Miksche, J. P. & Shapiro, S.
Item Type: Refine your search to only Report
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