Search Results

open access

High-Pressure Gamma Loop for Brookhaven National Laboratory

Description: Report issued by the Brookhaven National Laboratory discussing high-pressured gamma loops. As stated in the introduction, "this latest endeavor involved three test cells, a gamma irradiation pool and supporting equipment, as well as an enlarged high-pressure gamma loop facility" (p. 1). This report includes tables, and illustrations.
Date: June 1963
Creator: Brookhaven National Laboratory
Partner: UNT Libraries Government Documents Department
open access

Mechanisms of Liquid Metal Corrosion

Description: The driving force for liquid metal corrosion is the equilization of chemical potential for dissolution of all solid surfaces in contact with the liquid. In any practical system, this is an impossible goal; therefore, one observes several mass transfer processes.
Date: 1963
Creator: Weeks, J. R.
Partner: UNT Libraries Government Documents Department
open access

Fundamental Problem of Late Neurological EffectFollowing Acute Irradiation

Description: Since the end of the last century (Tarknow, 1896) radiation effect o the nervous tissue has been studied in experimental animals and humans by numerous investigators, using mostly pathomorphological changes as a parameter of radiosensitivity . With increasing time intervals following radiation, pathomorphological changes are more evident, which has been known for quite some time.
Date: February 1, 1963
Creator: Yamamoto, Y. L.
Partner: UNT Libraries Government Documents Department
open access

Transport of FissionProducts Through the Soil Following Injection From a Well and Methods Used for Removal

Description: In the summer of 1960 one of the little used wells on the Brookhaven National Laboratory site became accidentally contaminated with radioactive material. The contamination was discovered during a routine sampling of all wells in the waste disposal area, so there was a period of several weeks between the time of discharge.
Date: February 1, 1963
Creator: Gemmell, L. & Pearsall, S. G.
Partner: UNT Libraries Government Documents Department
open access

Di-Interstitial Annealing During the First Neutron Irradiation of Graphite: The Mobility of C2

Description: Radiation and annealing mechanisms for dimensional and c-axis changes in which the di-interstitial can be mobile at any or all temperatures above absolute zero are shown to be concordant with earlier work used to determine the migration energy energy of single interstitials and the absolute rate of displacing atoms in graphite. The mechanisms account for the stability of c-axis and dimensional changes with time in the absence of irradiation and with observed c-axis annealing at room temperatureā€¦ more
Date: February 1, 1963
Creator: Schweitzer, Donals G.
Partner: UNT Libraries Government Documents Department
open access

The Function of Bridging Groups in Electron-Transfer Reactions

Description: Electron-transfer reactions involving bridged transition states are examined from the point of view of adiabatic electron transfer theory. One important function of the bridging group is to decrease the effective dipole moment of the charge system of the reaction ions. The effect on the activation energy is different for outer-sphere and inner-sphere reactions. Trends in the halide and hydroxide catalysis of isotopic exchange reactions of transition metal ions are discussed.
Date: February 1, 1963
Creator: Hush, N. S.
Partner: UNT Libraries Government Documents Department
open access

Chronic Excess Salt Consumption as an Etiologic Factor in Human Hypertension

Description: Since 1940 it has been known that extra salt (i.e. sodium chloride) facilitated the development of experimental hypertension induced by various sterols; subsequently hypertension was induced by desoxycorticosterone acetate plus sodium chloride; then hypertension was produced by using hypertonic saline as the sole source of liquid; and finally, in 1953, Menesly and his associates reported that chronic ingestion of excess dietary salt alone would produce hypertension in rats. Furthermore, in confā€¦ more
Date: February 1, 1963
Creator: Dahl, Lewis K.
Partner: UNT Libraries Government Documents Department
open access

The Effects of Chronic Gamma Irradiation on the Growth of Kalanchoe cv. "Brilliant Star"

Description: Kalanchoe seedlings were exposed to 330 r/20 hrs/day from a Co60 source. Samples were harvested weekly. No new leaves were produced after initial exposure to irradiation. Mitosis in the apical meristem appears to have been suppressed. However, the axillary meristem and the cambium continue their activity. This results in a much broadened stem tip with enlarged cells, supported by a stout internode in which cell size has remained relatively normal but cell number has increased. After about 26 daā€¦ more
Date: February 1, 1963
Creator: Stein, O. L. & Sparrow, A. H.
Partner: UNT Libraries Government Documents Department
open access

The Effects of Radiations of Different let on Early Responses in the Mammal

Description: This paper will first note briefly the place and status of radiobiotopical investigations with fast neutrons. The monoenergetic (fast) neutron technique employed at this laboratory will be then described and results of studies with various criteria-of-effect in the mouse will be reviewed. Finally, certain general patterns of response for these systems will be pointed out as functions of neutron energy.
Date: February 1, 1963
Creator: Bateman, J. L. & Bond, V. P.
Partner: UNT Libraries Government Documents Department
open access

The Fate of Transfused H3 Thymidine Labeled Bone Marrow Cells in Irradiated Recipients

Description: It has been established by chromosome marker studies, histochemical, immunological, and cytological methods that the hemopoietic tissues of animals exposed to lethal doses of whole-body irradiation can be repopulated by transfused autologous, homologous or heterologous bone marrow cells. However, the morphology of the cell responsible for the regeneration of hematopoietic activity in the various hemopoietic organs has not been identified. It has been shown that the bone marrow contains the cellā€¦ more
Date: February 1, 1963
Creator: Fliedner, T. M.; Thomas, E. D.; Meyer, L. M. & Cronkite, E. P.
Partner: UNT Libraries Government Documents Department
open access

Tissue Distribution and Storage Forms of Vitamin B12 Injected and Orally Administered to the Dog

Description: Previous attempts by the present authors to compare the behavior of orally administered vitamin B12 with that of injected material have been inconclusive. Thus, 30 days after administration to normal humans, 0.19% of a tracer amount (0.5 Ī¼g) of injected radioactive vitamin B12 is excreted per day; and in an independent study, the eventual daily output was found to be 0.23% of a 3 Ī¼g dose. By contrast the total excretion rate of normal vitamin B12 from body stores appears to be only ā‰ˆ0.03% per dā€¦ more
Date: February 1, 1963
Creator: Rosenblum, Charles; Reizenstein, Peter G.; Cronicite, Eugene P. & Meriwether, Henry T.
Partner: UNT Libraries Government Documents Department
open access

Lysogeny in Rhizobium Leguminosarum and R. Trifolii

Description: Seven lysogenic strains - three of Rhizobium Leguminosarum and four of R-trifolii - were identified among a total of 54 strains from these two species and R. phascoli. The R. leguminosarum strain may be multiply lysogenic; two of them also produce lethal agents resembling bacteriocins in their effects. Lysogeny was confirmed by standard criteria of UV-inducibility, self-immunity, and reproductive ability. Lysogenic conversion involving symbiotic characteristics was not observed. A minimum of sā€¦ more
Date: February 1, 1963
Creator: Schwinghamer, E. A. & Reinhardt, D. J.
Partner: UNT Libraries Government Documents Department
open access

Indirect Effect of X-Radiation on Bone Growth in Rats

Description: It has been known for many years that bone growth may be retarded by relatively large doses of therapeutic radiation. Similar doses of radiation have also shown retarded growth in animals. More recently, reports of studies of Japanese children exposed to the Atomic Bomb Detentions at Hiroshima and Nagasaki and Marshallese children exposed to radiation in the fallout accident of 1954 have indicated some impairment in their growth and development, possibly related to radiation exposure. Since theā€¦ more
Date: February 1, 1963
Creator: Conard, R. A.
Partner: UNT Libraries Government Documents Department
open access

Elimination of Phases the Life Cycle of Leukemic Cells From in Vivo Labeling in Human Beings With Tritiated Thymidine

Description: Our earlier in vitro studies have suggested that malignant tumors may not produce new cells more rapidly than normal cells are produced in the "steady state" equilibrium. Obviously tumors of all typed represent a diversion from "steady state" production with a net gain in mass of tissue. However, the increase in mass is not necessarily constant and may fluctuate in the natural history of the disorder. DNA labeling with tritiated thymidine had made it possible to characterize normal "steady statā€¦ more
Date: February 1, 1963
Creator: Killmann, S. A.; Cronkite, E. P.; Robertson, J. S.; Fliedner, T. M. & Bond, V. P.
Partner: UNT Libraries Government Documents Department
open access

The Effects of 250-kv X-Ray on the Dog's Pancreas: Morphological and Functional Changes

Description: Previous investigations that the pancreas is a radioresistant organ. Ivy in 1924 noted the presence of a fibrotic atrophic pancreas in a dog which had received one erythema dose to the epigastrium. Fisher in 1923 reported that four to five erythema doses delivered in a single application caused complete disappearance of the irradiated pancreatic remnant in about two months. These dogs died because of uncontrolled diabetes. One dog that received four erythema doses (possibly 200 r) was sacrificeā€¦ more
Date: February 1, 1963
Creator: Archamefau, John; Griem, Melvin & Harper, Paul
Partner: UNT Libraries Government Documents Department
open access

Radiation Damage in Graphite. II. Consecutive and Steady State Reactions of Interstitial Complexes

Description: Periodically irradiated and annealed graphites show property changes that are markedly different from the changes after the first irradiation and anneal. Evidence is presented indicating the existence of consecutive reactions between interstitial complexes that lead to steady state concentrations of the intermediate species in a chain. The steady state concentrations result in dimensional recoveries and stored energy releases that do not increase with irradiation as they do in continuously irraā€¦ more
Date: 1963
Creator: Schweitzer, Donald G.
Partner: UNT Libraries Government Documents Department
open access

The Ultraviolet Sensitivity of Frozen Phage

Description: Recent reports (1, 2, 3, 4, 5) suggest that the crystalline structure of ice permits unusual forms of energy relationships and that the structured state of water may be of importance in the whole cell. A number of biologically interesting compounds show significantly altered responses to the excitation energy of ultraviolet light in ice as compared to the liquid state. This paper describes the effect of a change in phase state on a biologically active nucleoprotein, a bacteriophage particle. Phā€¦ more
Date: 1963
Creator: Levine, Myron & Cox, Emma
Partner: UNT Libraries Government Documents Department
open access

The Microbeam as a Tool in Radiobiology

Description: In the analysis of the effect of ionizing radiation on living systems, the problem is complicated by the interaction of one part of the system with other parts. If an entire mouse is subjected to radiation, only a few of the most radiosensitive organs, the "weak links," react to the insult and essentially limit the size of the dose delivered since there is little to be learned from irradiating a dead mouse. Thus an insensitive organ like muscle will not respond at all to a total body dose. Likeā€¦ more
Date: February 1, 1963
Creator: Curtis, Howard J.
Partner: UNT Libraries Government Documents Department
open access

Cell Population Kinetics of an Osteogenetic Tissue, I

Description: Cell proliferation on the actively growing periosteal surface of the femur of rabbits aged two weeks, has been investigated using autoradiographic techniques. Injections of tritiated glycine and tritiated thymidine were given simultaneously and the animals sacrificed at intervals from one hour to 5 days after injection. The glycine labelled the position of the bone surface at the time of injection and the thymidine labelled the cells which were synthesizing DNA . The rate of increase in the celā€¦ more
Date: March 12, 1963
Creator: Maureen, Owen
Partner: UNT Libraries Government Documents Department
open access

Cell Population Kinetics of an Osteogenetic Tissue, II

Description: A study of the cell kinetics on the actively growing periosteal surface of the femur of rabbits ages two weeks has been continues. A single injection of tritiated thymidine was given and the rabbits killed from one hour to four days after injection. The grain count spectra of the different cell types, pre-osteoblast, osteoblast and osteocyte, have been compared at different times after injection. The results showed evidence for the uptake of thymidine in nuclei which is not associated with cellā€¦ more
Date: March 12, 1963
Creator: Owen, Maureen & Pherson, Sheila Mac
Partner: UNT Libraries Government Documents Department
open access

Beam Separators for Bev Particles

Description: The problem of separation of beams of particles of different masses but of the same momentum at Bev energies is the subject of a great deal of study at several high energy laboratories. In this note we shall describe the problem and tabulate a few of the cogent parameters. Frequently the student of high energy interactions is faced with a beam of miscellaneous particles coming from an accelerator. By standard techniques this beam can be rendered approximately parallel and an inch or so in diameā€¦ more
Date: January 22, 1963
Creator: Blewett, J. P.
Partner: UNT Libraries Government Documents Department
open access

A Re-Analysis of Short-Range Order in Cu3Au

Description: Cowley's measurements of the short-range order parameters, Ī±i, in Cu3Au at T=405Ā°C have been re-evaluated taking into account the effects of thermal vibrations and static displacements due to differing atomic sizes. The separate corrections for the thermal vibrations and the first-neighbor atomic size factor are found to be quite large, demonstrating their importance in the usual experiments. When combined, the corrections in this case largely cancel, and only the values of Ī±1 and Ī±3 are apprecā€¦ more
Date: February 25, 1963
Creator: Walker, C. B. & Keating, D. T.
Partner: UNT Libraries Government Documents Department
open access

An Isochronal Differential Microcalorimeter

Description: An isochronal differential-type microcalorimeter has been designed and constructed. As a result of its simple design it is very easy to handle the samples and assemble the calorimeter. Important to the operation of the calorimeter is a program, also working on the differential principle, that provides linear temperature rise of the samples. This calorimeter is used to measure very small energy releases such as those found in precipitation, stored energy, etc. It is demonstrated that the calorimā€¦ more
Date: February 25, 1963
Creator: Arndt, R. A. & Fujita, F. E.
Partner: UNT Libraries Government Documents Department
open access

Wave Functions for Quadrupole Antishielding Factors

Description: The purpose of this paper is to present tables of the perturbed wave functions which have been recently obtained in a calculation of the quadruple antishielding factors Ī³āˆž for the Mn+2, Fe+3, Ga+3, and Ag+ ions. The wave functions v'1(nā„“-ā„“) which are tabulated represent the effect of the perturbation due to a nuclear quadruple moment Q on the wave functions of the outermost electrons of the ion core.
Date: February 25, 1963
Creator: Sternheimer, R. M.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen