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Author : Alan D. Conger
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Cytogenetic Effect of Slow Neutrons written by Alan D. Conger and published by . This book was released on 1950 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Isheeta Seth
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (921 download)
Download or read book Bystander Effects Due to Neutrons, and Low-dose Hyperradiosensitivity to Gamma Rays in Human Cells Using Cytogenetics written by Isheeta Seth and published by . This book was released on 2014 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 2: Micronuclei have been used extensively in studies as an easily-evaluated indicator of DNA damage but little is known about their association with other types of damage such as nucleoplasmic bridges and nuclear buds. Radiation-induced clastogenic events were evaluated via the cytokinesis-block micronucleus assay in two normal human lymphoblastoid cell lines exposed to neutrons or gamma radiation. Micronuclei, nucleoplasmic bridges and nuclear buds were enumerated by recording the coincident presence of these endpoints within individual cells, and the associations among these three endpoints were evaluated for all treatment conditions. The common odds ratios for micronuclei and nucleoplasmic bridges were found to be significantly larger than unity, indicating that the presence of one or more micronuclei in a cell imposes a significant risk for having one or more nucleoplasmic bridges in that same cell, and vice versa. The strength of this association did not change significantly with radiation dose. Common odds ratios for association between micronuclei and buds, and between bridges and buds were also found to be significantly higher than unity. However, associations between micronuclei and buds could not be calculated for some treatments due to heterogeneity in the odds ratios, and hence may depend on radiation dose. This study provides evidence for how paired analyses among genetic endpoints in the cytokinesis-block micronucleus assay can provide information concerning abnormalities of cell division and possibly about structural chromosomal rearrangements induced by radiation. Chapter 3: Bystander effects have been observed repeatedly in mammalian cells following photon and alpha particle irradiation. However, few studies have been performed to investigate bystander effects arising from neutron irradiation. Here we asked whether neutrons also induce a bystander effect in two normal human lymphoblastoid cell lines.
Download or read book Rbe of Monoenergetic Fast Neutrons written by and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The relative biological effectiveness (RBE) of neutrons of 5 energies and x radiation at 3 exposure levels were compared in maize seeds. The maize material used in these experiments had the advantsge for RBE studies of yielding a basically first order dose-response curve (Y = alpha plus or minus BETA D) with low (x rays) as well as with high (fast neutron) LET radiations. The frequency of yellow-green (yg/sub 2/ sectors in leaves, 3, 4, and 5 of young plants grown from irradiated Yg/sub 2//Yg/syb 2/ seeds served as a quantitative measure of response. The mutant sectors are believed to be due mostly to simple chromosome breakage and deletion. An exposure apparatus was used which produced essentially equal dose rates in five rings of seeds placed so as to intercept neutrons of 0.43, 0.65, 1.00, 1.50, and 1.80 Mev. Dose average LET values for these energies are 72, ments were performed at dosages that gave responses which were linear, below saturation levels, and overlapping in range for x rays andd neutrons. These ranges in dosages were 32.8 to 126.4 rads of neutrons and 1500 to 15,600 rads of 250 kvp x rays. RBE values, calculated from relative slopes of linear regression lines for N and X, randged from 42 to 135. Monoenergetic fast neutrons of 0.43 Mev were the most efficient in producing yg/sub 2/sectors as shown by the yield of sectors per krad andd highest RBE values. The RBE values obtained in these experiments are higher than commonly reported. With regard to minimum permissible levels of radiation, these results suggest the alternatives that either chromosome breaks in plants have a much higher RBE than comparable reactions in mand and need not be considered; or that the problem of chromosome damage per se in human tissues be reexamined after exposure to high LET radiations andd/or low LET radiations at low doses or dose rates. (auth).
Author : Anal D. Conger
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Effects of Slow Neutrons from the Oak Ridge Pile on Tradescantia Chromosomes written by Anal D. Conger and published by . This book was released on 1948 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Research Council
Publisher : National Academies
ISBN 13 : 0309039959
Total Pages : 436 pages
Book Rating : 4.3/5 (9 download)
Download or read book Health Effects of Exposure to Low Levels of Ionizing Radiation written by National Research Council and published by National Academies. This book was released on 1990-02-01 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reevaluates the health risks of ionizing radiation in light of data that have become available since the 1980 report on this subject was published. The data include new, much more reliable dose estimates for the A-bomb survivors, the results of an additional 14 years of follow-up of the survivors for cancer mortality, recent results of follow-up studies of persons irradiated for medical purposes, and results of relevant experiments with laboratory animals and cultured cells. It analyzes the data in terms of risk estimates for specific organs in relation to dose and time after exposure, and compares radiation effects between Japanese and Western populations.
Author :
Publisher :
ISBN 13 :
Total Pages : 1216 pages
Book Rating : 4.0/5 ( download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-06 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 1596 pages
Book Rating : 4.F/5 ( download)
Download or read book United States Government Publications Monthly Catalog written by and published by . This book was released on 1950 with total page 1596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Superintendent of Documents
Publisher :
ISBN 13 :
Total Pages : 1576 pages
Book Rating : 4.:/5 (319 download)
Download or read book United States Government Publications Monthly Catalog written by United States. Superintendent of Documents and published by . This book was released on 1950 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Author :
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ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.E/5 ( download)
Download or read book TID. written by and published by . This book was released on 1953 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 820 pages
Book Rating : 4.3/5 (91 download)
Download or read book Radiation Research written by and published by . This book was released on 1968 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Angela N. H. Creager
Publisher : University of Chicago Press
ISBN 13 : 022601794X
Total Pages : 506 pages
Book Rating : 4.2/5 (26 download)
Download or read book Life Atomic written by Angela N. H. Creager and published by University of Chicago Press. This book was released on 2013-10-02 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: After World War II, the US Atomic Energy Commission (AEC) began mass-producing radioisotopes, sending out nearly 64,000 shipments of radioactive materials to scientists and physicians by 1955. Even as the atomic bomb became the focus of Cold War anxiety, radioisotopes represented the government’s efforts to harness the power of the atom for peace—advancing medicine, domestic energy, and foreign relations. In Life Atomic, Angela N. H. Creager tells the story of how these radioisotopes, which were simultaneously scientific tools and political icons, transformed biomedicine and ecology. Government-produced radioisotopes provided physicians with new tools for diagnosis and therapy, specifically cancer therapy, and enabled biologists to trace molecular transformations. Yet the government’s attempt to present radioisotopes as marvelous dividends of the atomic age was undercut in the 1950s by the fallout debates, as scientists and citizens recognized the hazards of low-level radiation. Creager reveals that growing consciousness of the danger of radioactivity did not reduce the demand for radioisotopes at hospitals and laboratories, but it did change their popular representation from a therapeutic agent to an environmental poison. She then demonstrates how, by the late twentieth century, public fear of radioactivity overshadowed any appreciation of the positive consequences of the AEC’s provision of radioisotopes for research and medicine.
Author : Quartermaster Food and Container Institute for the Armed Forces (U.S.). Library Branch
Publisher :
ISBN 13 :
Total Pages : 546 pages
Book Rating : 4.3/5 (243 download)
Download or read book Ionizing Radiations written by Quartermaster Food and Container Institute for the Armed Forces (U.S.). Library Branch and published by . This book was released on 1955 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.0/5 ( download)
Download or read book Technical Reports Series written by and published by . This book was released on 1968 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (91 download)
Download or read book Biological Effects of Neutrons, Gamma Radiation, and Neutron-gamma Combinations written by and published by . This book was released on 1954 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An annotated bibliography of 190 items is presented, covering AEC report literature and selected references from the open literature on biological effects of neutrons, gamma radiations, and combinations of both.
Author :
Publisher :
ISBN 13 :
Total Pages : 500 pages
Book Rating : 4.:/5 (319 download)
Download or read book Technical Information Pilot written by and published by . This book was released on 1951 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Wesley Schmidt
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (31 download)
Download or read book The Effect of Thermal-neutron Irradiation of Maize and Barley Kernels written by John Wesley Schmidt and published by . This book was released on 1951 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 508 pages
Book Rating : 4.0/5 ( download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1992-10 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
