Resource Type
Decade
Month
655 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
655
next
Absolute Asymmetric Synthesis.
None
Date:
January 1, 1972
Creator:
Bernstein, W. J.
System:
The UNT Digital Library
Absolute thermal expansion of copper and aluminum between 5 K and 330 K
None
Date:
November 1, 1974
Creator:
Kroeger, F.R. Jr.
System:
The UNT Digital Library
Absorption spectra of glasses in the far infrared
None
Date:
January 1, 1974
Creator:
Cabrera, C. L.
System:
The UNT Digital Library
AN AC TEMPERATURE TECHNIQUE FOR MEASURING THE HIGH-TEMPERATURE SPECIFIC HEAT OF METALS.
None
Date:
January 1, 1970
Creator:
Finnila, R. M.
System:
The UNT Digital Library
Accuracy and optimization of tracking systems
None
Date:
August 1, 1973
Creator:
Sanford, R.L.
System:
The UNT Digital Library
THE ACTIVE CENTER OF THE PLANT-TYPE FERREDOXINS: STUDIES BY MOESSBAUER SPECTROSCOPY.
None
Date:
January 1, 1970
Creator:
Dunham, W.R.
System:
The UNT Digital Library
Aerosol trace element analysis using neutron activation and x-ray fluorescence
None
Date:
February 1, 1974
Creator:
Roberts, N.J.
System:
The UNT Digital Library
$alpha$-transfer studies via the ($alpha$,$sup 8$Be) reaction at high energies
None
Date:
August 1, 1974
Creator:
Wozniak, G.J.
System:
The UNT Digital Library
Aluminum recovery from coal fly ash by high temperature chlorination
A study of aluminum recovery from power plant fly ash by high temperature chlorination was undertaken to demonstrate that fly ash could be a potential source of aluminum, iron and possibly silicon. Magnetic separation of the iron oxide served as a first step to alleviate the iron contamination problem. However, the agglomeration of some iron oxide with alumina and silica made it difficult to completely separate the iron from the fly ash. Further iron separation was achieved by chlorinating the nonmagnetic ash fraction at 550/sup 0/C for 30 minutes. This reduced the iron oxide content to less than 4 percent by weight. Chlorine flow rates affected the reaction rate much more drastically than temperatures. This suggested that diffusion was the major rate-controlling step. Besides Fe/sub 2/O/sub 3/, Al/sub 2/O/sub 3/ and SiO/sub 2/, other oxides such as CaO, K/sub 2/O, Na/sub 2/O and MgO might have complicated the alumina recovery by forming individual chlorides or complexes. Investigating methods for separating more Fe/sub 2/O/sub 3/, and possibly CaO, K/sub 2/O, Na/sub 2/O and MgO from the nonmagnetic ash fraction before chlorinating it is highly recommended.
Date:
October 1, 1977
Creator:
Wijatno, H.
System:
The UNT Digital Library
Analog-digital simulation of pulse column control characteristics
None
Date:
May 1, 1973
Creator:
Kelly, A. M.
System:
The UNT Digital Library
Analysis and design of a pyrotechnic-powered self-stopping actuator
None
Date:
January 10, 1975
Creator:
Kopytoff, V.
System:
The UNT Digital Library
Analysis and Development of FACE Automatic Apparatus for Rapid Identification of Transuranium Isotopes
A description of and operating manual for the FACE Automatic Apparatus has been written along with a documentation of the FACE machine operating program, to provide a user manual for the FACE Automatic Apparatus. In addition, FACE machine performance was investigated to improve transuranium throughput. Analysis of the causes of transuranium isotope loss was undertaken both chemical and radioactive. To lower radioactive loss, the dynamics of the most time consuming step of the FACE machine, the chromatographic column output droplet drying and flaming, in preparation of sample for alpha spectroscopy and counting, was investigated. A series of droplets were dried in an experimental apparatus demonstrating that droplets could be dried significantly faster through more intensie heating, enabling the FACE machine cycle to be shortened by 30-60 seconds. Proposals incorporating these ideas were provided for FACE machine development. The 66% chemical loss of product was analyzed and changes were proposed to reduce the radioisotopes product loss. An analysis of the chromatographic column was also provided. All operating steps in the FACE machine are described and analyzed to provide a complete guide, along with the proposals for machine improvement.
Date:
September 1, 1978
Creator:
Sebesta, E.H.
System:
The UNT Digital Library
Analysis of $sup 3$He--$sup 4$He mixture specific heat data
None
Date:
December 1, 1974
Creator:
Dockendorf, L
System:
The UNT Digital Library
Analytical and Experimental Studies Relating to the Simulated Start-Up of in-Core Thermionic Reactor Systems.
None
Date:
January 1, 1970
Creator:
Guppy, J. G.
System:
The UNT Digital Library
Analytical applications of resins containing amide and polyamine functional groups
A dibutyl amide resin is used for the separation of uranium(VI), thorium(IV), and zirconium(IV) from each other and several other metal ions. Uranium(VI) and thorium(IV) are determined in the presence of large excesses of foreign metal ions and anions. A practical application of the amide resin is studied by determining uranium in low grade uranium ores. The amide resin is also used for the selective concentration of gold(III) from sea water.
Date:
December 1, 1977
Creator:
Orf, G. M.
System:
The UNT Digital Library
Analyzing power, polarization, and polarization transfer measurements in the reaction T(p,n)$sup 3$He
None
Date:
November 1, 1973
Creator:
Jarmer, J. J.
System:
The UNT Digital Library
Anelastic Study of Divacancy Damping in Gold.
None
Date:
January 1, 1970
Creator:
Franklin, D. G., III
System:
The UNT Digital Library
ANGULAR CORRELATION THEORY IN HIGH ENERGY PHYSICS.
None
Date:
January 1, 1971
Creator:
Schmidt, C K
System:
The UNT Digital Library
Anomalous epsilon/$beta$$sup +$ decay branching ratios
None
Date:
January 1, 1974
Creator:
Firestone, R.B.
System:
The UNT Digital Library
Anomalous Radial Plasma Losses in a Q-Machine With Mirror Magnetic Fields.
None
Date:
April 1972
Creator:
Searing, Richard Manor
System:
The UNT Digital Library
Antibaryon production and high energy oscillations
None
Date:
April 1, 1974
Creator:
Koplik, J.
System:
The UNT Digital Library
Apparatus for investigating low energy ion-molecule reactors and its application to the reactive scattering of N$sup +$ by H$sub 2$
None
Date:
November 1, 1974
Creator:
Fair, James Alan
System:
The UNT Digital Library
Application of generalized classical trajectories in nuclear physics
A new semi-classical method, the so-called uniform semiclassical approximation, is described briefly and then applied to two nuclear physics problems. The basic features of this method are that the dynamics of the problem is treated completely classically (that is, one solves classical equations of motion), but the quantum mechanical superposition principle is retained by evaluating a phase along the classical trajectory and adding probability amplitudes for indistinguishable processes rather than probabilities themselves. The first problem considered is the backscattering from a deformed nucleus and the excitation of rotational states in the target at energies up to the Coulomb barrier. The multiple Coulomb excitation calculations are in quantitative agreement with a very different method (the de Boer-Winther code). A nuclear optical potential is also considered and the nuclear-Coulomb interference for heavy ions is studied. The second problem considered is the tunneling through a two-dimensional barrier. This problem (which is supposed to simulate the penetration through a two-dimensional fission barrier) is investigated by a fully quantum-mechanical coupled-channel calculation and by the uniform semiclassical approximation. A quantitative agreement is found. (auth)
Date:
September 1, 1975
Creator:
Leser, H.M.
System:
The UNT Digital Library
Application of Monte Carlo criticality calculations to the Ames Laboratory Research Reactor
>Thesis. The modeling of the Ames Laboratory Research Reactor core region and the input required to utilize the Monte Carlo computer code KENO for criticality calculations are described. Reactivity calculations in terms of k- effective were made for various reactor configurations and compared to measurements made on the actual reactor. (16 references) (auth)
Date:
April 1, 1974
Creator:
Hull, D.L.
System:
The UNT Digital Library