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Spectroscopy of transition metal species in rare gas matrices. I. Vanadium metal. II. Sulfides. III. Carbonyl complexes. IV. Dinitrogen complexes. V. Homonuclear diatomic compounds
Description:
No Description Available.
Date:
October 1, 1975
Creator:
DeVore, T. C.
Partner:
UNT Libraries Government Documents Department
Fall and winter movements and activity of muskrats in east-central Minnesota
Description:
No Description Available.
Date:
August 1, 1974
Creator:
Stolen, Paul Dean
Partner:
UNT Libraries Government Documents Department
Formal analysis of name accessing in programming languages. [R]
Description:
No Description Available.
Date:
October 1, 1975
Creator:
Smith, C. L.
Partner:
UNT Libraries Government Documents Department
Response of Shortgrass Plains Vegetation to Chronic and Seasonally Administered Gamma Radiation
Description:
In order to determine the effect of radiation on the structure of native shortgrass plains vegetation, an 8750 Ci 137Cs source was installed on the Central Plains Experimental Range near Nunn, Colorado; The experimental area was divided into 6 treatment sectors, a control, 2 sectors for chronic exposure (irradiation initiated April 1969 and continuing as of August 1971), and one each for spring, summer and late fall seasonal semi-acute (30 day), exposures which were administered during April, J…
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Date:
August 1, 1971
Creator:
Fraley, L. Jr.
Partner:
UNT Libraries Government Documents Department
Low temperature heat capacity of lutetium and lutetium hydrogen alloys
Description:
The heat capacity of high purity electrotransport refined lutetium was measured between 1 and 20/sup 0/K. Results for theta/sub D/ were in excellent agreement with theta values determined from elastic constant measurements. The heat capacity of a series of lutetium-hydrogen solid solution alloys was determined and results showed an increase in ..gamma.. from 8.2 to about 11.3 mJ/g-atom-K/sup 2/ for hydrogen content increasing from zero to about one atomic percent. Above one percent hydrogen ..g…
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Date:
October 1, 1977
Creator:
Thome, D. K.
Partner:
UNT Libraries Government Documents Department
Polariton effects in naphthalene crystals
Description:
The experimental verification of the two-step nature of energy dissipation of photon energy by a crystal is the subject of this dissertation. The ..cap alpha..(O,O) Davydov component of the lowest energy singlet transition in pure strain-free napthalene single crystals is shown to exhibit an increase in absorption with increasing temperature, due to an increase in polariton damping via polariton-phonon scattering processes. (GHT)
Date:
October 1, 1977
Creator:
Robinette, S. L.
Partner:
UNT Libraries Government Documents Department
Synthesis and characterization of an N-(2-hydroxyethyl)-ethylenediaminetriacetic acid resin
Description:
A chelating ion-exchange resin with N-(2-hydroxyethyl)ethylene-diaminetriacetic acid (HEDTA) used as the ligand chemically bonded to XAD-4 by an ester linkage, HEDTA-4, was synthesized. It is stable under normal experimental conditions with the liquid chromatograph. The structure of the resin was confirmed by an infrared spectrum, and by potentiometric titrations. The capacity of the resin was also obtained by potentiometric titration and by a nitrogen analysis. The resin was used to pack a col…
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Date:
October 1, 1977
Creator:
Lai, Y. F.
Partner:
UNT Libraries Government Documents Department
Electron microscopy of hydrocarbon production in parthenium argentatum (guayule)
Description:
The electron microscope was used to study the biological processes involved in hydrocarbon production. The little desert shrub Guayule (Parthenium argentatum) was selected for study. This shrub can produce hydrocarbons (rubber) in concentrations up to 1/4 of its dry weight. It grows on semi-arid land and has been extensively studied. The potential of Guayule is described in detail. Results of an investigation into the morphology of Guayule at the electron microscope level are given. Experiments…
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Date:
November 1, 1977
Creator:
Bauer, T.E.
Partner:
UNT Libraries Government Documents Department
Stress induced reorientation of vanadium hydride
Description:
The critical stress for the reorientation of vanadium hydride was determined for the temperature range 180/sup 0/ to 280/sup 0/K using flat tensile samples containing 50 to 500 ppM hydrogen by weight. The critical stress was observed to vary from a half to a third of the macroscopic yield stress of pure vanadium over the temperature range. The vanadium hydride could not be stress induced to precipitate above its stress-free precipitation temperature by uniaxial tensile stresses or triaxial tens…
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Date:
October 1, 1977
Creator:
Beardsley, M. B.
Partner:
UNT Libraries Government Documents Department
Electromigration of hydrogen and deuterium in vanadium, niobium, and tantalum
Description:
The electric mobility and effective valence of hydrogen and deuterium in vanadium, niobium, tantalum and three niobium-tantalum alloys were measured. A resistance technique was used to directly determine the electric mobility of hydrogen and deuterium at 30/sup 0/C while a steady-state method was used to measure the effective valence. The use of mass spectrographic techniques on a single specimen which contained both hydrogen and deuterium greatly increased the precision with which the isotope …
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Date:
October 1, 1977
Creator:
Jensen, C. L.
Partner:
UNT Libraries Government Documents Department
Use of a semiconductor laser in infrared spectroscopy
Description:
A semiconductor laser has certain properties which makes its use desirable as a continuous monitor of atmospheric pollutants. Its energy output is concentrated in widely separated energy modes of very narrow bandwidths (less than 10/sup -5/ cm/sup -1/) which can be centered on one infrared absorption line of one gas. This makes the laser quite selective. The energy in each mode is typically greater than 200 ..mu.. watts, and, because of the laser's small size, its light energy can be colli…
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Date:
December 1, 1977
Creator:
Morris, R. N.
Partner:
UNT Libraries Government Documents Department
Temperature dependence of resistivity of thin film samples of chalcogenide glasses
Description:
No Description Available.
Date:
October 1, 1975
Creator:
Kulkarni, A. K.
Partner:
UNT Libraries Government Documents Department
Inductively coupled plasma--atomic emission spectrometry: trace elements in oil matrices
Description:
The simultaneous determination of up to 20 trace elements in various oil matrices by inductively coupled plasma-atomic emission spectrometry is reported. The oil matrices investigated were lubricating oils (for wear metals), fuel oil, centrifuged coal liquefaction product, crude soybean oil, and commercial edible oils. The samples were diluted with appropriate organic solvents and injected into the plasma as an aerosol generated by a pneumatic nebulization technique. Detection limits of the 28 …
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Date:
December 1, 1977
Creator:
Peterson, C. A.
Partner:
UNT Libraries Government Documents Department
Analytical applications of resins containing amide and polyamine functional groups
Description:
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.
Partner:
UNT Libraries Government Documents Department
Dislocation morphology in deformed and irradiated niobium. [Neutron irradiation]
Description:
Niobium foils of moderate purity were examined for the morphology of dislocations or defect clusters in the deformed or neutron-irradiated state by transmission electron microscopy. New evidence has been found for the dissociation of screw dislocations into partials on the (211) slip plane according to the Crussard mechanism: (a/2) (111) ..-->.. (a/3) (111) + (a/6) (111).
Date:
June 1, 1977
Creator:
Chang, C. P.
Partner:
UNT Libraries Government Documents Department
Lanthanide extraction with 2,5-dimethyl-2-hydroxyhexanoic acid
Description:
This research is concerned with the solvent extraction into chloroform of the lanthanides, using 2,5-dimethyl-2-hydroxyhexanoic acid (DMHHA). This acid is the first ..cap alpha..-hydroxy aliphatic acid to be studied as an extracting agent for the lanthanides. The chloroform-water DMHHA partition constant was determined to be 1.0 (at 0.1 M ionic strength and 25/sup 0/C). The acid dimerizes in chloroform with a constant of 56. The light lanthanides can be extracted into chloroform by forming comp…
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Date:
December 1, 1977
Creator:
Miller, J. H.
Partner:
UNT Libraries Government Documents Department
Anomalous Radial Plasma Losses in a Q-Machine With Mirror Magnetic Fields.
Description:
No Description Available.
Date:
April 1972
Creator:
Searing, Richard Manor
Partner:
UNT Libraries Government Documents Department
Magnetic excitations above the critical temperature
Description:
No Description Available.
Date:
October 1, 1975
Creator:
Swanson, P. A.
Partner:
UNT Libraries Government Documents Department
Investigation of high energy runaway electron confinement in the Oak Ridge tokamak
Description:
High energy runaway electrons in the Oak Ridge tokamak ORMAK have been investigated through measurement of the bremsstrahlung produced when these electrons leave the discharge and strike the limiting aperture of the torus. The experimental results have been interpreted in terms of a classical single-particle model appropriate for collisionless particles in a tokamak, and it has been found that most of the confinement properties of high energy runaways in ORMAK can be understood on this basis. A…
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Date:
November 1, 1977
Creator:
Zweben, S. J.
Partner:
UNT Libraries Government Documents Department
ELECTRON TRANSFER REACTIONS OF FERROCENE.
Description:
No Description Available.
Date:
January 1, 1971
Creator:
Pladziewicz, J R
Partner:
UNT Libraries Government Documents Department
Heated uranium tetrafluoride target system to release non-rare gas fission products for the TRISTAN isotope separator. [As replacement for uranyl stearate]
Description:
Off-line experiments indicated that fluorides of As, Se, Br, Kr, Zr, Nb, Mo, Tc, Ru, Sb, Te, I and Xe could be volatilized, but except for Br, Kr, I and Xe, none of these elements were observed after mass separation in the on-line experiments. The results of the on-line experiments indicated a very low level of hydride contamination at ambient temperature and consequently, uranium tetrafluoride replaced uranyl stearate as the primary gaseous fission product target. Possible reasons for the fail…
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Date:
October 1, 1977
Creator:
Gill, R. L.
Partner:
UNT Libraries Government Documents Department
Photoexcitation in Superconductors
Description:
Dissertation discussing the results of experiments to study the behavior of superconductors under light illumination.
Date:
June 1976
Creator:
Schuller, Ivan
Partner:
UNT Libraries Government Documents Department
The Relationship of Fifth-Grade Students' Self-Concepts and Attitudes toward Mathematics to Academic Achievement in Arithmetical Computation, Concepts, and Application
Description:
The purpose of this study was to determine the interrelationship of self-concept and attitude toward mathematics to academic achievement in the areas of arithmetical computation, concepts, and application.
Date:
August 1971
Creator:
Moore, Bobbie Dean
Partner:
UNT Libraries
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Social Science
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Spanish Literature
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1
Speech Comuaication and Drama
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Speech-Drama
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Studio Arts
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Theoretical Nuclear Physics
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Trumpet
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United States History
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Violin Performance
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Vocal Performance
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Vocational Education
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musicoiogy
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{{{Music}}}
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