| Non-Thermal Process in a Linear Pinch Device. |
SEP 1972 |
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| Authors:
T. N. Lee; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
 | A low pressure, linear discharge initiated by focusing a pulsed laser beam between two electrodes produces a concentrated thermal plasma of (T sub e) about 8 keV and (N sub e) about 10 to the power of 21/cc. This plasma emits x-ray line radiation arising from highly stripped atoms such as hydrogen and helium-like iron ions. The temperature of the Fe XXV-ion estimated from Doppler line broadening is higher than ... |
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| Thermal effects in the melting of solids: integral techniques for predicting heat transfer and melting rates. |
MAY 71 |
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| Authors:
O. M. Griffin; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A short background of the heat balance integral techniques is outlined, and the appropriate parameters which govern the thermal transport process are presented. The application of the results to non-Newtonian melts is discussed and the extension to variable property situations is outlined. The results are directly applicable to contact melting systems, and the governing parameters are useful in the correlation of other melting processes. The results are discussed with regard ... |
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| CAMP PARKS MASS FIRES. |
AUG 1969 |
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| Authors:
Clay P. Butler; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The report summarizes experimental work on the dynamic characteristics of burning buildings, as studied with small plywood models and one full-scale barracks section. Parameters measured include total energy release rate, total thermal radiation, and carbon monoxide concentrations at scaled street levels, as well as carbon monoxide concentrations in a model basement. The ratios of total thermal radiation to total energy release rate at maximum burning time are: for a skirted ... |
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| PYROLYSIS PRODUCTS OF UNTREATED AND FLAME RETARDANT TREATED ALPHA-CELLULOSE AND LEVOGLUCOSAN. |
AUG 1969 |
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| Authors:
Frank A. Wodley; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| A typical gas chromatogram of the volatile pyrolysis products (molecular weights less than 150) of untreated alpha-cellulose contains 39 peaks, however, mass spectral data indicate that at least 59 compounds are present. Since the initial pyrolysis products undergo decomposition, both initial and subsequent decomposition products are included in the analysis. A comparison of the products generated in the temperature range 330 - 400C indicates that the formation of pyrolysis products ... |
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| MULTIPLE LINEAR REGRESSION ANALYSIS OF SCINTILLATION GAMMA-RAY SPECTRA: THEORETICAL AND PRACTICAL CONSIDERATIONS, |
05 JUN 1969 |
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| Authors:
David F. Covell; M. Brown; Sachio Yamamoto; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Application of the method of multiple linear regression as a data-analysis technique for gamma-ray scintillation spectrometer data requires knowledge of (1) the response matrix of the spectrometer and (2) the covariance matrix of the unknown spectrum (or spectra). Neither matrix is known exactly. The response matrix can usually be determined with good precision and an estimate of the covariance matrix can usually be made. Perturbations or errors ... |
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| PRELIMINARY ANALYSIS OF THE APPLICATION OF FALLOUT MONITORING DATA TO FALLOUT PREDICTION DURING AND AFTER A NUCLEAR ATTACK, |
14 MAY 1969 |
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| Authors:
Laurence J. P. Minvielle; David W. Hoffman; Samuel C. Rainey; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| The applicability of fallout monitoring information to the improvement of prediction of the distribution of fallout during or after a nuclear attack is discussed. An analytic technique is developed for predicting fallout radioactivity surface density (or exposure rate if converted) at locations downwind from a monitoring station at which a measurement of radioactivity surface density or exposure rate is taken after fallout cessation. Also developed is a method ... |
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| MASS FIRE SCALING WITH SMALL ELECTRICALLY HEATED MODELS. |
MAY 1969 |
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| Authors:
B. T. Lee; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Electrical models based on partial scaling principles neglecting molecular transport parameters have been built to scale the gross flow features of a mass fire down to laboratory size. Data in the report were obtained with two models which, when placed in a corner, simulated quadrants of a 2 foot by 2 foot and of a 4 foot by 4 foot fire. Both models consist of square arrays of electrical heating ... |
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| A PROPOSED MODEL FOR THE DECOMPOSITION OF CELLULOSE AND THE EFFECT OF FLAME RETARDANTS. |
MAY 1969 |
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| Authors:
William J. Parker; Anne E. Lipska; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| A simplified model for the decomposition of cellulose is presented along with the effects of flame retardants on this model. It is supported by several specific laboratory tests. The basic hypothesis is that above 275C cellulose decomposes through the simultaneous unzipping of all the cellulose molecules, thus accounting for the constant rate of decomposition over most of the pyrolysis period. There is only one controlling reaction, namely unzipping, not competing ... |
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| THE SYNERGISTIC EFFECT OF BENZHYDRYLATION-IODINATION ON THE FLAMMABILITY OF ALPHA-CELLULOSE. |
MAY 1969 |
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| Authors:
Anne E. Lipska; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Cellulose samples were subjected to various degrees of iodination, benzhydrylation and benzhydrylation followed by iodination. The effect of these treatments on crystallinity, rate of thermal degradation, char production and pyrolysis products was investigated. Results indicated that in general the crystallinity index varies inversely with the percent of substitution, rate of weight loss, and amount of residual char. Although the rates of weight loss of the substituted samples increased from 0.3%/min. ... |
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| OPERATION FLAMBEAU - CIVIL DEFENSE EXPERIMENT AND SUPPORT: EYEWITNESS ACCOUNTS OF A MASS FIRE. |
MAY 1969 |
71 pages |
| Authors:
Clay Preston Butler; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
 | Seven men skilled in fire research were stationed around the periphery of Flambeau Fire 760-12 and recorded visual impressions of its magnitude. Also, instrumental data were taken both inside the fire zone and outside, so that visual magnitudes of the mass fire may be compared with its measured physical parameters. Visual magnitudes for this fire were: Flame heights up to 300 feet, horizontal flames 100 feet; thermal radiation uncomfortable at ... |
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| PROMPT REACTIONS OF THE RABBIT TO X-RAYS, |
03 APR 1969 |
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| Authors:
Edward L. Hunt; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Ionizing radiation is known to act as a stimulus for the visual and olfactory systems. Its capacity to act as a stimulus when regions of the body other than the head are exposed was investigated. The rabbit, maintained in a steady sleep-like state induced by reflex immobilization ('animal hypnosis') was the test animal. The prompt occurrence of behavioral arousal, heart rate alteration and/or a change in regular respiratory movements in ... |
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| HEMATOLOGICAL RESPONSE IN SHEEP GIVEN PROTRACTED EXPOSURES TO 60CO GAMMA RADIATION, |
26 MAR 1969 |
|
| Authors:
Edwin T. Still; S. T. Taketa; Earl J. Ainsworth; George F. Leong; James F. Taylor; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The changes in the total leukocytes in sheep irradiated with cobalt-60 gamma at a rate of 1.9 R/hr have been determined. After 50 R total exposure, maximum depression occurred 24 hours later. After 100 R or 175 R, maximum depression occurred within one hour. Recovery to control values was seen by 8 - 9 days for all three exposure groups. The recovery pattern for the circulating leukocytes was qualitatively the ... |
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| RESIDUAL INJURY IN THE ERYTHROPOIETIC SYSTEM OF SHEEP AFTER Co60 GAMMA RADIATION, |
18 FEB 1969 |
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| Authors:
Harven Ng; George F. Leong; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Erythropoietic activity, as measured by Fe59 uptake, was determined in nonirradiated sheep and in sheep surviving midlethal exposures to Co60 radiation approximately two years prior to this study. A group of survivors of the midlethal exposure and sheep which received 50 R approximately 6 months previously were challenged with 170 R X-irradiation during this study to determine the effects of this stressing exposure on erythropoietic activity. Nonirradiated sheep and those ... |
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| TURBULENT DIFFUSION IN THE INTERMEDIATE WATERS OF THE NORTH PACIFIC OCEAN, |
05 FEB 1969 |
|
| Authors:
Edward A. Schuert; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A field experiment to measure turbulent diffusion in stable intermediate water was conducted in the Kauai channel off the island of Oahu, Hawaii, in the spring of 1968. 122,000 grams of Rhodamine BMG dye were injected with neutral buoyancy at a depth of 300 meters. The growth of the dye pool was followed for over 72 hours with towed pumping systems coupled to on-deck fluorometers. A complete description of the ... |
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| NEW STAINING TECHNIQUE FOR SPLEEN NODULES: A COMPARISON OF Do'S, |
28 JAN 1969 |
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| Authors:
Rex M. Larsen; Earl J. Ainsworth; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| The colony-forming unit (CFU) is thought to be a (the) hematopoietic stem cell, and CFU methodology has been used extensively to evaluate radiation damage to the hematopoietic system in mice. Although the method works satisfactorily, the counting of macroscopic spleen nodules is laborious, time-consuming, and, to a certain extent, subjective. A staining-clearing method has been developed which greatly facilitates and renders this method less tedious and more reproducible. The spleen ... |
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| MULTIPLE LINEAR REGRESSION ANALYSIS OF SCINTILLATION GAMMA-RAY SPECTRA: AUTOMATIC CANDIDATE SELECTION. |
17 JAN 1969 |
|
| Authors:
M. A. Hogan; Sachio Yamamoto; David F. Covell; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Multiple linear regression (MLR) has been shown to be a quantitative and statistically justifiable method for unfolding scintillation gamma-ray pulse-height spectra of radionuclide mixtures. The principal requirements of the method are: (1) that well-calibrated data be used, and (2) that the candidate set of spectra (standard spectra to be used as regression variables) must be complete and exclusive. In the usual application of the MLR method, the user exercises a ... |
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| IN SITU OCEANIC Cs-137 SAMPLING TECHNIQUE, |
05 JAN 1969 |
|
| Authors:
Takeo H. Shirasawa; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The use of inorganic ion exchangers, which are selective for cesium, and their application in ocean sampling have been adapted into an in situ pump/adsorber sampling technique. The new sampling system, which is capable of processing very large volumes of seawater to a maximum depth of 2000 meters, is described. The system was tested and evaluated during two ocean cruises, and the improvement in resolution possible by this ion-exchange method ... |
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| ASSESSMENT OF RADIATION DAMAGE TO THE HEMATOPOIETIC CELLS OF MICE-DEPENDENCE OF Do ON THE SIZE OF ENDOGENOUS SPLEEN NODULES, |
31 DEC 1968 |
|
| Authors:
Earl J. Ainsworth; Rex M. Larsen; Adam E. McKee; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The colony-forming unit (CFU) exhibits many properties of the hematopoietic stem cell, and CFU methodology has been extensively used in many laboratories to assess radiation damage to the hematopoietic system of mice. The radiation responses of CFU's may be measured by either the endogenous or the transplantation method, and with either method, the number of spleen nodules decreases exponentially with increasing radiation exposure. (Author) |
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| FISSION YIELDS OF SEVERAL IODINE ISOTOPES AND HALF-LIFE AND FISSION YIELD OF 135Te, |
31 DEC 1968 |
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| Authors:
Allen E. Greendale; Arnaldo A. Delucchi; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Measurements have been made of the independent fission yields of several iodine isotopes in thermal-neutron-induced fission of 235U. These yields were obtained by isolation of iodine fission products at early times after fission by a new, fast radiochemical procedure. The fractional cumulative fission yield and half-life of 135Te were also determined from the experimental results. (Author) |
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| MODIFICATION OF URETHAN-LUNG TUMOR INCIDENCE BY LOW X RADIATION DOSES. CORTISONE AND TRANSFUSION OF ISOGENIC LYMPHOCYTES. |
30 DEC 1968 |
|
| Authors:
Leonard J. Cole; William A. Foley; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Young adult male LAF1 mice were exposed to a single (300 R) dose of X rays, followed one day later by an intraperitoneal injection of urethan, 0.08 mg or 0.2 per gram body weight Cortisone acetate was injected subcutaneously, 7 injections of 2.5 mg each, on alternate days beginning one day after irradiation. The mice were sacrificed 25 to 26 weeks after the urethan injection, and the enumeration of lung ... |
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| GASTRIC MUCOSA AFTER IRRADIATION. II. INHIBITION OF GASTRIN-STIMULATED ACID SECRETION (pH 3.0) IN RELATION TO TRANSLOCASE ACTIVITY, |
20 DEC 1968 |
|
| Authors:
Burton E. Vaughan; Joseph T. Cummins; Rita L. Pessotti; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Immediately after a dose of 240R, whole body X-irradiation, spontaneous (non-stimulated) acid secretion was inhibited. The inhibition was transient and acid secretion resumed promptly after injection of gastrin as the semipurified hormone. During the stimulation phase, a subsequent irradiation dose of 3000 R caused inhibition which was also transient, since secretion resumed immediately on cessation of the irradiation. Under standard conditions of gastrin stimulation, a dose dependent reduction in acid ... |
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| CELLULAR RESPONSE OF MICE TO INFECTION WITH PASTEURELLA TULARENSIS (LVS) FOLLOWING CONTINUOUS EXPOSURE TO LOW DOSE RATE GAMMA RADIATION. |
13 DEC 1968 |
|
| Authors:
Myron S. Silverman; Vivian Greenman; Adam E. McKee; K. Hadley; Frederick A. Hodge; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Immune irradiated mice responded with an increased histiocytic and plasma cell mobilization. Although some pathologic lesions were seen in these mice, they occurred to a lesser degree than in either irradiated or non-irradiated non-immune mice. (Author) |
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| A CODE FOR CALCULATING NEUTRON COMPOUND-NUCLEUS CROSS SECTIONS AND ANGULAR DISTRIBUTIONS: JANE, |
13 DEC 1968 |
|
| Authors:
James M. Ferguson; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A FORTRAN code is described which calculates the (n,n'), (n,p), and (n, alpha) cross sections due to compound nuclear processes. The code also calculates the angular distributions of neutrons and secondary gamma rays produced by inelastic scattering. A unique feature of the code is that the optical-model transmission coefficients needed for neutrons, protons and alpha particles are generated internally. A complete user's description is given. Also, several sample applications of ... |
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| GASTRIC MUCOSA AFTER IRRADIATION. I. EVIDENCE FOR NEURAL AND PERMEABILITY CHANGES AFFECTING ELECTRICAL POLARIZATION AT 4 HOUR AND 170 HOUR, |
12 DEC 1968 |
|
| Authors:
Burton E. Vaughan; Rita L. Pessotti; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Recent work has permitted separation of an intact mucosa from isolated stomach of irradiated rats, and these preparations show several important differences from previous studies. Four hours after irradiation, mucosas showed 30% elevation in transmural potential due to an inhibition of the normally tonic cholinergic excitation of this separated epithelium. Other factors which could directly alter the transmural electrical potential remained essentially constant; for example tissue permeability as determined by ... |
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| THE MIXED LEUCOCYTE INTERACTION CONSIDERED AS AN IMMUNE RESPONSE, |
10 DEC 1968 |
|
| Authors:
Raymond K. Main; Marjorie J. Jones; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A simple method was adapted to the isolation of leucocytes from the peripheral blood of the mouse and rat. The relatively low ratio of erythrocytes to leucocytes, so obtained afforded optimal responses in the mixed leucocyte interaction. A critical concentration of 2.0 per cent syngeneic mouse plasma in the presence of 2.0 per cent unfiltered foetal bovine serum as culture medium supplement was found to promote optimal responses in the ... |
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| SEAWATER CORROSION STUDIES OF SNAP-21 MATERIALS, |
03 DEC 1968 |
43 pages |
| Authors:
Donald A. Kubose; Ming G. Lai; Harry A. Goya; Herman I. Cordova; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The corrosion rates of several SNAP-21 materials measured in seawater at ambient room temperature and pressure (Hastelloy C, Hastelloy X, Titanium-621, Berylco-165) have been compared to those measured in 200C seawater vapor (Hastelloy C, Hastelloy X), in seawater under a hydrostatic pressure of 7000 psi (Hastelloy C, Titanium-621, Berylco-165) (23C) and in seawater in an ionizing radiation field of 200,000 r/hr (Hastelloy C, Hastelloy X) (30C). Significant increases in corrosion ... |
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| MECHANISMS OF PROTECTION AGAINST GASTROINTESTINAL AND HEMATOPOIETIC RADIATION LETHALITY BY PARABIOSIS, |
26 NOV 1968 |
|
| Authors:
Harold W. Carroll; Donald J. Kimeldorf; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The mechanisms for protection through parabiosis against both the acute intestinal and hematopoietic radiation death were investigated in two separate experiments. The length of time after irradiation that the parabiosis must remain intact for protection to occur was investigated in the first experiment. The data show that if surgical separation is delayed to 48 hours postexposure, protection against 3- to 5-day death occurs, and if delayed to 96 hours, protection ... |
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| RECOVERY OF SHEEP AFTER WHOLE-BODY IRRADIATION: A COMPARISON OF CHANGES IN RADIOSENSITIVITY AFTER EITHER ACUTE OR PROTRACTED EXPOSURE. |
25 NOV 1968 |
|
| Authors:
Robert P. Page; Earl J. Ainsworth; James F. Taylor; George F. Leong; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The kinetics of recovery of sheep in terms of time-dependent changes in radiosensitivity (LD50) have been evaluated as a function of dose rate and size of exposure to 60Co gamma or 1 Mvp X-rays. Although there were certain quantitative differences in recovery pattern, as related to both dose rate and size of the conditioning exposure, the basic pattern can be qualitatively described as consisting of three distinct phases. The first ... |
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| EARLY INCREASE IN THE MISCIBLE DEOXYCYTIDINE POOL IN RATS AFTER X IRRADIATION, |
22 NOV 1968 |
|
| Authors:
Charles D. Guri; Henry J. Minot; Karl F. Swingle; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Intraperitoneal and intravenous injections of tracer quantities of 3H- or 14C-labeled deoxycytidine (CdR) were used to investigate the biologic half-life, the miscible pool size, and the turnover rate of CdR in normal and X-irradiated rats. The specific activity of highly purified CdR isolated from blood plasma samples taken at various times after injection of the tracer CdR was used as the basis for calculating these values. The mean values observed ... |
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| CHARGED PARTICLE TRACKS IN POLYMERS NO. 7: SENSITIVITY ENHANCEMENT OF LEXAN, |
22 NOV 1968 |
|
| Authors:
Eugene V. Benton; Richard P. Henke; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Ultraviolet radiation in the presence of oxygen has been used to greatly enhance track-etching rates in Lexan polycarbonate nuclear particle track detector. When irradiated detectors are stored in darkness, the slow variation of chemical track reactivity with the age of latent tracks can be explained as being caused by the presence of oxygen. (Author) |
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| PROPERTIES OF SODIUM AND POTASSIUM ACTIVATED ADENOSINE TRIPHOSPHATASES OF RAT BRAIN: EFFECT OF CYCLOPROPANE AND OTHER AGENTS MODIFYING ENZYME ACTIVITY, |
12 NOV 1968 |
|
| Authors:
A. J. Trevor; Joseph T. Cummins; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Two ATP-hydrolyzing enzyme systems (ATPases), possibly lipoprotein in nature, have been isolated from particulate fractions of rat cerebral cortex homogenates. They consist of at least two components, one Mg(2+) dependent and the other Mg(2+), Na(+) and K(+) dependent. ATP hydrolysis is measured both by orthophosphate and hydrogen ion liberation. A lack of stoichiometry exists (H(+) ion release 2X orthophosphate formation) over the first 90 seconds of the reaction. H(+) ion ... |
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| EFFECT OF X IRRADIATION (0.6-2.4 kR) ON CATION ACTIVATED ATPases FROM SUBCELLULAR FRACTIONS OF RAT BRAIN, |
12 NOV 1968 |
|
| Authors:
Joseph T. Cummins; Burton E. Vaughan; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A small significant increase in the activity of a purified ATPase stimulated by (Na(+) + K(+)) was demonstrated at doses of 0.6 to 2.4 kR. Regression analysis indicates a curvilinear radiation effect; with a significant plateau at doses above 1.2 kR. After 1200 R, a decrease of this same enzyme activity was noted when the more reactive sylfhydryl groups were blocked with n-ethylmaleimide. Only the activity stimulated by Na(+) + ... |
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| DOSE-RATE STUDIES WITH SHEEP AND SWINE, |
08 NOV 1968 |
|
| Authors:
Earl J. Ainsworth; Norman P. Page; James F. Taylor; George F. Leong; Edwin T. Still; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Experiments have been conducted to compare the time course of recovery for acute exposures in several species of animals. The object of these experiments is to define species differences in recovery potential, to seek the physiological basis for differences in recovery potential, and to provide both generalizations and meaningful estimates for recovery in humans subjected to acute (prompt) or protracted exposures. The purpose of this report is to review dose-rate ... |
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| THE QUALITY AND LET DEPENDENCE OF THREE THERMOLUMINESCENT DOSIMETERS AND THEIR POTENTIAL USE AS SECONDARY STANDARDS. |
07 NOV 1968 |
|
| Authors:
Eugene Tochilin; Norman Goldstein; J. T. Lyman; William G. Miller; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The energy dependence of thermoluminescent dosimeters was investigated over a range of x- and gamma-ray energies extending from 6 to 2750 keV. Radiation sources included filtered x rays and isotopes emitting gamma rays of known energies. In order to correlate the energy deposited in the phosphor with light output, the measured response was compared with the computed value of absorbed dose. A systematic increase in light output with decreasing photon ... |
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| NEUTRON FLUENCE AND DOSE MEASUREMENTS WITH FISSION FOIL-LEXAN DETECTORS, |
04 NOV 1968 |
|
| Authors:
Paul F. Rago; Norman Goldstein; Eugene Tochilin; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A fission foil-Lexan detector system has been developed to monitor reactor neutrons. It is similar to the system based on counting fission gamma rays but has some advantages; i.e., permanently recorded tracks that can be read any time after exposure; integrated recording; microgram amounts of fissionable material needed; independence of fission product distribution; and the elimination of specialized gamma-ray counting equipment. Fission product damage tracks in the Lexan (or mica) ... |
|
| ALTERATION OF A CAT SMALL INTESTINE MECHANO-RECEPTOR RESPONSE BY IONIZING RADIATION, |
01 NOV 1968 |
|
| Authors:
Richard E. Talbott; Dave C. Jones; Donald J. Kimeldorf; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The data presented are pertinent for identification of abdominal neural components capable of responding promptly to ionizing radiation. Responses of thirty-seven receptors located at the serosal surface of the small intestine were obtained from anesthetized cats. None of these receptors exhibited spontaneous activity and none of the 21 irradiated receptors, each receiving about 0.5 rad/sec from a 25 mc strontium-yttrium-90 beta source, exhibited neural activity as a consequence of irradiation ... |
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| RETARDED IMMUNOLOGICAL RECOVERY IN SUBLETHALLY X-IRRADIATED MICE BY ADDITIONAL THYMIC EXPOSURE. REVERSAL WITH INJECTED MARROW CELLS, |
24 OCT 1968 |
|
| Authors:
William E. Davis Jr.; Leonard J. Cole; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The role of the intact thymus in recovery of the immune response following a sublethal dose of X radiation was studied. Groups of adult LAF1 mice were exposed to 500 rad of X rays and some of these animals, appropriately lead-shielded, then received an additional 500, 1000, or 2000 rad to the thymic area through a 1.2 cm diameter shield opening. Three criteria of immunological response were employed: (1) numbers ... |
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| RECALCULATION OF NEUTRON OPTICAL MODEL PARAMETERS AND INELASTIC SCATTERING CROSS SECTIONS FOR Na, Mg, Al, Si, S, Ti, Cr and Fe, |
21 OCT 1968 |
|
| Authors:
James M. Ferguson; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A revised set of calculations of secondary gamma-ray production cross sections is presented. The new calculations differ from earlier ones in that they were performed with optical model potentials which were individually fit to elastic scattering data for the appropriate element. Optical model parameters for Na, Mg, Al, Si, S, Ti, Cr, and Fe are presented. Secondary gamma-ray cross sections for Na, Mg, and Al are compared with experiment. The ... |
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| DEPOLARIZATION OF THE NEURALLY BLOCKED GASTRIC MUCOSA OF THE RAT, |
23 SEP 1968 |
|
| Authors:
Joseph T. Cummins; Burton E. Vaughan; Rita L. Pessotti; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The effects of brief alternating and square wave currents on gastric bioelectric activity and acid secretion were studied at frequencies between 10 and 10000 cycles/sec. Whereas acid secretion remains unchanged, potential and conductance are inversely affected by both wave forms, indicating a depolarization of the epithelium. Excitation conditions allowing optimal recovery from pulsing (100 cycles/sec and 10 V) are similar to those required to affect other preparations like squid axon ... |
|
| CYTOTOXICITY OF BEE VENOM AND SOME OF ITS CHROMATOGRAPHIC FRACTIONS FOR MOUSE BONE MARROW STEM CELLS, |
20 SEP 1968 |
|
| Authors:
Leonard J. Cole; William H. Shipman; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Mouse bone marrow cells were incubated (37 for 30 minutes) in the presence of bee venom, and then assayed for their ability to form hemopoietic splenic colonies when transfused into lethally X-irradiated recipient mice. It was found that at honey bee venom concentrations as low as 0.5 micrograms/ml (0.5 part per million by weight) the colony-forming ability of the marrow cells was annulled. Three constituents of bee venom, i.e., melittin, ... |
|
| A COMPTON-SUPPRESSED COINCIDENCE GAMMA-RAY SCINTILLATION SPECTROMETER WITH LARGE NaI(T1) CRYSTALS, |
19-Sep-1968 |
|
| Authors:
Bruce A Euler; David F Covell; Sachio Yamamoto; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| A Compton-suppressed coincidence gamma-ray scintillation spectrometer has been assembled to obtain high sensitivity and selectivity in gamma-ray spectral measurements. The spectrometer is intended to satisfy requirements for the identification and estimation of low levels of gamma-ray radioactivity in a broad range of sample sizes and masses containing moderately complex mixtures of gamma-emitting radionuclides. (Author) |
|
| ANALYSIS OF THE RADIATION-INDUCED LOSS OF TESTES WEIGHT IN TERMS OF STEM CELL SURVIVAL, |
18 SEP 1968 |
|
| Authors:
John S. Krebs; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The proportion of radiation-insensitive tissue in the testes of the C57L mouse was determined to be 36.9% of the normal nonirradiated testes weight. The weights of testes of these mice at 28 days after various doses of irradiation were analyzed by subtracting out the radiation-insensitive weight and calculating the surviving fraction (S/So) of radiation-sensitive weight. The logarithm of S/So could be fitted linearly to the radiation dose, indicating an exponential ... |
|
| BILE ACIDS AND LIPID METABOLISM II. ESSENTIAL ROLE OF BILE ACIDS IN BILE PHOSPHOLIPID EXCRETION, |
16 SEP 1968 |
|
| Authors:
Cecil Entenman; Roy J. Holloway; Marion L. Albright; George F. Leong; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| The isolated rat liver perfusion system has been used to study the release of bile phospholipid P32 following the injection of inorganic P32 into the perfusate. It was demonstrated that in the absence of added bile salt very little PLP32 was excreted into bile, but when bile salt was added to the perfusate, the PLP32 excretion increased markedly. It is suggested that bile acids play an essential role in the ... |
|
| DECAY PROPERTIES OF 133Sb, |
16 SEP 1968 |
|
| Authors:
William J. Treytl; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
|
| Radiations from the decay of 133Sb have been studied with use of solid state and scintillator gamma and beta detectors. Singles gamma, gamma-gamma, and beta-gamma measurements have been performed, and a decay scheme for 133Sb has been constructed consisting of levels at 0, 334, 979, 1152, 1679 and 2776 keV. Beta branches and log ft values have been deduced. The Q sub beta for 133Sb has been measured to be ... |
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| ACUTE MORTALITY AND RECOVERY STUDIES IN BURROS IRRADIATED WITH 1Mvp X-RAYS, |
05 SEP 1968 |
|
| Authors:
Edwin T. Still; Norman P. Page; James F. Taylor; William G. Wisecup; Earl J. Ainsworth; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| With 1 Mvp X-rays, the acute LD50/30 (midline air exposure) of adult female burros was determined to be 369 R; the acute LD50/60 was determined to be 344 R. The split-dose technique, which consists of conditioning animals with a sublethal exposure and redetermining the LD50 at various times thereafter, was used to determine the recovery pattern after an exposure to 250 R. By this method, the burro appeared to have ... |
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| IGNITION OF RETARDANT TREATED CLOTH BY NUCLEAR WEAPON THERMAL PULSES, |
22 AUG 1968 |
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| Authors:
Lyman L. Wiltshire; William J. Parker; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| The ignition responses of fire retardant treated black cotton cloth and black rayon cloth to the simulated thermal pulses from nuclear weapons were investigated. The temporal and spectral characteristics of the main thermal pulse from air bursts ranging from 300 KT to 100 MT were reproduced using a cored carbon arc along with a specially shaped rotating disk shutter. The treatments applied to the cloths were a combination of borax, ... |
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| GAMMA-RAY SPECTRA OF THE PRODUCTS OF THERMAL-NEUTRON FISSION OF 235U AT SELECTED TIMES AFTER FISSION, |
16 AUG 1968 |
40 pages |
| Authors:
Leland R. Bunney; Daniel Sam; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Experimental measurements of the gamma-ray spectra emitted by the products of thermal-neutron fission of 235U have been made at nine selected times (1/4, 1/2, 1, 2, 5, 10, 24, 48, and 72 hours) after fission. A calibrated and highly collimated 5 in. x 5 in. NaI(T1) detector was used. The 100-energy-bin gamma-ray spectra were unfolded from the pulse-height distributions by means of an iterative method. Extensive use was made of ... |
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| RADIOISOTROPIC POWER GENERATORS: STATE OF THE ART REPORT, |
07 AUG 1968 |
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| Authors:
Francis J. Berlandi; Francis K. Kawahara; J. Kim; V. E. Schrock; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| A 'state-of-the-art' compilation of radioisotopic power generators are summarized with respect to fuels, conversion devices, and overall system design performance through 1966. The fuel data is listed according to isotope mass number. The conversion devices discussed are thermoelectric, thermionic, Brayton, Rankine, and Stirling cycles. The systems section lists the major features that characterize RPG units in use in this country. (Author) |
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| AGE AT X-IRRADIATION AND ACUTE RADIATION MORTALITY IN THE ADULT MALE RAT, |
05 AUG 1968 |
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| Authors:
Dave C. Jones; Garold K. Osborn; Donald J. Kimeldorf; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Male rats received whole body single doses of 250 kvp X-rays at various ages ranging from young adulthood to old age. From probit analysis, the LD50/30 values for groups exposed at 3 or 7 months of age were 851 and 900 R, respectively. After adjustment for the natural morality rate, LD50/30 values for groups exposed at 17, 21, or 24 months of age were 776, 806, and 747 R, respectively. ... |
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| ALTERED-SPLIT DOSE RECOVERY IN MICE IRRADIATED UNDER HYPOXIC CONDITIONS, |
26 JUL 1968 |
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| Authors:
Theodore L. Phillips; E. John Ainsworth; NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF
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| Mice can be protected from irradiation by exposure to an atmosphere of 5% oxygen, and a dose modifying factor (DMF) of 2.03 is obtained. The amount of injury to the bone marrow appears similar when two-thirds of these LD50's are given, respectively, as indicated by serial white blood cell counts. A significant difference in the recovery patterns was noted after a conditioning dose under hypoxic and air conditions. This was ... |
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