137 Matching Results

Search Results

Results: 1 - 24 next
open access

Annual Progress Report May 31, 1953: Massachusetts Institute Of Technology Laboratory For Nuclear Science

Description: Progress is reported on the following: Chemistry of the Fission Elements Group, Cosmic Ray Group, Elementary Particle Scattering Group, Nuclear Chemistry (Inorganic) Group, Nuclear Chemistry (Organic) Group, ONR Generator Group, Radioactivity and Cyclotron Group, Synchrotron Group, and Theoretical Group.
Date: May 31, 1953
Creator: Massachusetts Institute of Technology. Laboratory for Nuclear Science.
Partner: UNT Libraries Government Documents Department
open access

The Intracavitary Administration of AU 198

Description: At the Cancer Research Institute of the New England Deaconess Hospital radioactive colloidal gold has been given solely by the intracavitary route. To date 25 patients have been treated. These have been of two types: (a) patients with recurrent fluid formation of cardiocentesis in the pleural or peritoneal cavities; (b) patients with cardiocentesis of the lung in whom radiogold has been instilled post-operatively into the empty hemithorax. The use of AU198 in the first group of cases is now w… more
Date: October 31, 1952
Creator: Cancer Research Institute, New England Deaconess Hospital
Partner: UNT Libraries Government Documents Department
open access

Structural Alterations in the Tissue Sections Associated with Embedding Following Freeze Drying

Description: Various types of tissue distortion and structural artifacts which occur in stained microscopic tissue sections are usually referred to as "fixation artifacts." These include, among other effects, shrinkage of cells (e.g. crenation of red cells, shrinkage of blood plasma away from vessel walls, and shrinkage of groups of cells producing microscopic empty spaces between structures within the tissue section. On the other hand, swelling and even rupture of cells (e.g. homolysis of red cells) is al… more
Date: October 31, 1952
Creator: Holt, Margaret W. & Warren, Shields, 1898-1980.
Partner: UNT Libraries Government Documents Department
open access

Thiomethyladenosine

Description: The mechanism of thiomethyladenosine accumulation in yeast was studied by attempting to substitute homocysteine methylmercaptane methylmercaptoethanol and methylome captopropionaldehyde for methionine as a specific precursor. Negative results militate against transmethylation as the underlying mechanism. Tracer studies with methyl-C14- and and S35-labeled methionine suggest transthiomethylation with intermediate formation of a thetin-like compound tentatively termed methionyladenosine. The occu… more
Date: October 31, 1952
Creator: Schlenk. F.
Partner: UNT Libraries Government Documents Department
open access

Radio-micrography as a Tool in Biological Investigation

Description: The technique of radio-micrography has been discussed. The necessary equipment has been described. Its applications with examples and comparison with other more conventional techniques have been pointed out.
Date: October 31, 1952
Creator: Askin, J E. C.; Yates, L L; Cauldwell, E W. & Harvey, R. A.
Partner: UNT Libraries Government Documents Department
open access

Nuclear Magnetic Resonance Project. Progress Report for March 15, 1951 to September 1, 1951. Steady State Transients in Nuclear Resonance and the Nuclear Relaxation time. T2, for Hydrocarbons

Description: The Bloch formulation of Nuclear Magnetic Resonance is applied to a repeated pulsing of the external electromagnetic field H1. The steady-state solution is shown to predict the existence of sidebands, a mirror signal, and magnetic field inhomogeneity effects. All of these effects ae shown to be verified experimentally, thus strengthening the ap0plicibility of the Block formulation to transient problems. The solution given was used to determine T2 from the observed transient signals for liquid h… more
Date: October 31, 1952
Creator: Cinnamon, C. A.
Partner: UNT Libraries Government Documents Department
open access

Nuclear Magnetic Resonance Project. Progress Report III for 1 September 1951 to 15 March, 1952. Determination of the Accuracy of the Infinitely Repeated Pulse Method and the Observed Effects of Molecular Self Diffusion in Liquids

Description: The range of measurements of nuclear magnetic resonance by the infinitely repeated pulse method is higher than the slow passage method of Bloch. As the measurements approach 10-1 seconds the effect of viscosity or self diffusions becomes important. For liquid hydrocarbons this effect is such as to make the previously measured values for liquid hydrocarbons subject to severe revision. Several possibilities have recently become apparent for making this improvement.
Date: October 31, 1952
Creator: Cinnamon, C. A.
Partner: UNT Libraries Government Documents Department
open access

Fuel Handling, Service and Waste Disposal Buildings Drain Test. Section I. Test Results DL-S-230 (T-641115)

Description: The purpose of the test was to prove the integrity of the non-active drains, the special drains, the sanitary drains, the chemical waster drains and the storm water drains by means of a water flow test and visual inspection. The two roof boxes and the one floor drain of 1B Auxiliary Equipment Room did not drain properly. The lab sink in the west end of the Radiochemistry Lab drained to the Special Monitored West Transfer Tank instead of the Monitored Waster Transfer Tank. All other drains funct… more
Date: March 31, 1959
Creator: Barclay, Richard E.
Partner: UNT Libraries Government Documents Department
open access

Control Rod Positions for Criticality. Section II. Fourth Performance. Test Results DL-S-149 (T-550130)

Description: The purpose of the test was to determine critical bank heights and bank worths for various rod configurations at normal plant operating temperature and pressure. The critical bank heights and bank worths were determined for various rod configurations after 560 EFPH's of reactor operations are charted in the report.
Date: March 31, 1959
Creator: Baird, John B.
Partner: UNT Libraries Government Documents Department
open access

Progress Report No. 53 for the Period June 1, 1958 through October 31, 1958

Description: This is the fifty-third progress report of the Laboratory for Nuclear Science at the Massachusetts Institute of Technology. Progress reported covers the period, for Physics, June 1, 1958 through August 31, 1958; and for Chemistry, June 1, 1958 through October 31, 1958. Progress is reported on the following areas: (1) Chemistry of the fission elements group, (2) Nuclear chemistry (inorganic) group, (3) Nuclear chemistry (organic) group, (4) Cosmic ray group, (5) High energy accelerator physics g… more
Date: October 31, 1958
Partner: UNT Libraries Government Documents Department
open access

14-Year 113Cd

Description: The half lives of Cd/sup 113m/ and Cd/sup 115m/ have been redetermined to be 14 sintering time 2 years and 44.2 sintering time 0.5 days, respectively. The ratio of Cd/sup 113m/Cd/sup 115m/ yields from thermal-neutron fission of U/sup 235/ is 0.27 sintering time 0.03, and the ratio of (n, ) formation cross sections is 0.31 sintering time 0.03. Combination of these ratios with literature values for the Cd/sup 115m/ fission yield and (n, ) formation cross section gives (1.9 sintering time 0.2) x 1… more
Date: October 31, 1959
Creator: Wahl, Arthur C.
Partner: UNT Libraries Government Documents Department
open access

Functions of Aging. Insolubilization of Protein as a Function of Aging. Final Report

Description: Whole-body x irradiation was used to accelerate the onset of senescence in female white rats. Comparisons of nonirradiated and irradiated tissues have been made using histological, physical, and enzyme techniques. The data amassed to date indicate that x irradiation causes a reduction of 20.6 percent in alpha- amino nitrogen liberated by tryptic hydrolysis in liver homogenates. This reduction in amino nitrogen is not observed, however, in muscle homogenates. Shrinkage temperature determinations… more
Date: March 31, 1959
Creator: Bjorksten, Johan, 1907-; Andrews, Fred A.; Trenk, Bruce & Bailey, Julia
Partner: UNT Libraries Government Documents Department
open access

Research and Investigation Leading to Methods of Generating and Detecting Radiation in the 100 to 1000 Micron Wavelength Range of the Spectrum. Quarterly Progress Report No. 11 for September 1, 1958 to December 1, 1958

Description: The purpose of this research is twofold: (a) To uncover new principles or techniques from which a CW source of electromagnetic radiation for the low millimeter and submillimeter wavelength range can be developed; (b) To develop suitable detectors, components and measuring techniques for evaluating and using the radiation as a diagnostic tool for plasma physics. The report gives present status of the work in (1) Ferrites; (2) Gas discharge multiplier; (3) New CW generation methods; and (4) Dete… more
Date: March 31, 1959
Creator: Coleman, P. D.; Baird, J. R.; Becker, R. C.; Hakki, B. W.; Stafford, J. J.; Strain, R. J. et al.
Partner: UNT Libraries Government Documents Department
open access

Summary of Proceedings of an Informal Discussion on the Radiation Chemistry of Water, January 8-9, 1959

Description: A report of discussions on radiation chemistry prepared from the editor's notes is presented. Included are sections on the present state of radiation chemistry of water, recent developments in theory, radiolysis of water in the solid state, electron capture and negative ion formation, new experimental techniques, and cube root law. (J.R.D.)
Date: October 31, 1959
Creator: Bünau, Günther von; Kurien, K. C.; Taylor, W. H. & Theard, L. M.
Partner: UNT Libraries Government Documents Department
open access

Radiation Chemistry of Organic Substances. Final Report for 1 January 1957 to 31 January 1959

Description: The chemical processing of reactor fuels involves the use of organic substances as extracting agents and as diluents. When most organic substances ae exposed to reactor fuel, radiation damage occurs. The objectives of this project were to provide more information regarding damage to hydrocarbon solvents which are similar to those used as solvents in the Thorex program and to determine if the radiation-damaged diluent has a pronounced deleterious effect upon the extraction process.
Date: January 31, 1959
Creator: Knight, James A., Jr.
Partner: UNT Libraries Government Documents Department
open access

Mechanisms of Surface Adsorption in Homogeneous Reactor Loops. Semi- Annual Report No. 2 for 1 July to 31 December, 1957

Description: Homogeneous reactor operating conditions in which solids and deposits are formed on loops were examined. Methods of removing existing deposits are also considered. Experiments were conducted to study the characteristics of solids and deposits on type-347 stainless steel and on Zircaloy-2 specimens using simulated homogeneous reactor solutions in a rocking autoclave. Ferric and chromic sulfate were added to the solution in some of the tests to form solids by hydrolysis. Four tests were run at 30… more
Date: October 31, 1959
Creator: Eding, H. J.
Partner: UNT Libraries Government Documents Department
open access

Department of Chemical Engineering Progress Report for September 1, 1957 Through June 30, 1958. Part I. Thermal Conductivity of Deuterium Oxide

Description: The thermal conductivity of heavy water was found to vary from 0.345 at 105 deg F through a maximum of 0.375 at about 265 deg F to 0.371 at 339 deg F. The conductivity was determined by a steady-state method in a cylindrical apparatus having an over-all length of 11.35 inches and a liquid layer about 0.061 inch thick. A temperature drop of approximately one degree Fahrenheit across the liquid was maintained. The temperature drop was measured with thermistors. The apparatus was calibrated with l… more
Date: October 31, 1959
Creator: Baker, B. L.
Partner: UNT Libraries Government Documents Department
open access

Determination of Coefficients of Reactivity. Test Results DL-S-151 (T-550132). Section I. Fourth Performance

Description: The purpose of the test was to determine the temperature and pressure coefficients of reactivity at sere power. The value for the temperature coefficient at the operating temperature of 523 F with 556.6 EFPH plant operation was 2.5 (delta E/F) x 16(-4). The magnitude of the temperature coefficient at the plant operating temperature (523 F) indicated the reactor is very stable during normal operations. The pressure coefficient varied from values of 1.41(deltaE/psig) x 10(-6) at 1437 psig to a.57… more
Date: January 31, 1959
Creator: Baird, John B.
Partner: UNT Libraries Government Documents Department
open access

Station Start-up Test. Test Results DL-S-163 (T-554923). Section 1

Description: The purpose of the test was to determine the station operating characteristics during a start-up with all reactor coolant loops initially cold, requiring chemical addition and the turbine cold. The plant was successfully taken from a cold condition to generator synchronizing in accordance with Volume I, Chapter 43, Station Start-up no. 1. Twice during the test malfunctioning equipment delayed the completion of the test. The 1B boiler drum level indication required repair work and the 1D loop wa… more
Date: January 31, 1959
Creator: Eckenrode, Gerald E.
Partner: UNT Libraries Government Documents Department
open access

Elk River Reactor Quarterly Project Report for September-October-November 1958

Description: Design and construction are proceeding on schedule. Physics and shielding calculation results are reported and discussed. Studies of the high- pressure B injection safety system are described. The programs for fuel element and materials development, reactor vessel and internal components, process and superheater, reactor building and plant facilities, and instrumentation are outlined. (For preceding period see AECU-3991.) (T.R.H.)
Date: October 31, 1959
Partner: UNT Libraries Government Documents Department
open access

Calculation of the G Factor for Gas Scattering Experiments

Description: The "G factor'' relating the yield to the beam intensity, target density, and scattering cross section is calculated for several types of aperture boundaries. The case of a front aperture composed of two parallel edges of infinite height with a rear aperture of any shape is calculated up to terms in the fourth derivative of the cross section. (W.D.M.)
Date: October 31, 1959
Creator: Silverstein, Edward A.
Partner: UNT Libraries Government Documents Department
open access

Steady State Performance of a Thermal Circulation Loop Containing a Parallel Path Heat Sink

Description: The steady-state performance of thermal circulation loops with parallel path heat sinks has been studied to determine what the system design and arrangement objectives are for such a loop. Though all heat sink paths may have thermal centers above the heat source thermal center, flow reversal through some of the paths may nevertheless occur. Such reversal can result in reduced performance if not in complete flow cessation if the improper type of arrangement design has been chosen. Assumptions no… more
Date: January 31, 1958
Creator: Foster, J. J.
Partner: UNT Libraries Government Documents Department
open access

Transient Response of Accelerometers

Description: "An approximate method is presented for determining the response of an accelerometer to a polygonal acceleration pulse or to a curvilinear pulse which has been approximated by a series of straight line segments. The accelerometer is completely characterized by its natural frequency the damping is not considered a variable. The treatment assumes that the damped oscillations occurring during each segment of the pulse sensibly vanish before the end of that segment. While this assumption does not h… more
Date: October 31, 1958
Creator: Soper, William G.
Partner: UNT Libraries Government Documents Department
open access

Behavior of Polyvalent Metallic Ions in 100% Acetic Acid Reactions of Rare Earth Compounds in Acetic Acid

Description: "The solution of a polymeric oxide such as a rare earth oxide in protonic solvents such as acetic acid may be regarded as a steo-wise process involving rupture of Ln-O-Ln linkages, to form "hydroxyacetates" of varying molecular size and complexity. Intermediate oxo-hydroxo-brdiges aggregates could therefore be formed by solvolysis processes. Further reaction with acetic acid could effect dehydration of such "hydroxyacetates", to yield oxo-bridged acetates, Ln2O(OAc).
Date: October 31, 1957
Creator: Audrieth, L. F.; Seaton, J. A. & Sherif, F. G.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen