Resource Type
Partner
Oklahoma Historical Society
330
UNT Libraries Government Documents Department
304
Hoston History Research Center at Houston Public Library
5
UNT College of Arts and Sciences
4
Rosenberg Library
3
Texas Medical Association
3
Dallas Municipal Archives
1
Moody Medical Library, UT
1
Private Collection of Rosa Walston Latimer
1
UNT Libraries Special Collections
1
Collection
The Chronicles of Oklahoma
330
Office of Scientific & Technical Information Technical Reports
304
John J. Herrera Papers
5
Texas Cultures Online
5
UNT Scholarly Works
4
Harris and Eliza Kempner
3
Rescuing Texas History, 2016
3
Frank Cuellar Sr. Collection
1
John F. Kennedy Memorial Collection
1
John F. Kennedy, Dallas Police Department Collection
1
2 More
Serial/Series Title
Degree Department
Country
Decade
Month
Language
653 Matching Results
Results open in a new window/tab.
SYNTHESIS OF MONO-, DI-, AND POLYNITROXIDES. CLASSIFICATION OF ESRSPECTRA OF FLEXIBLE DINITROXIDES DISSOLVED IN LIQUIDS AND GLASSES
The synthesis of flexible biradical strain-gauges which could be anchored onto two sites of a deformable biological structure had been attempted. Qualitative relationships between the possible conformations of the biradicals and the observed ESR spectra provide guidelines for further synthetic work. Some of the nitroxides synthesized and characterized are: R-CO-R{sub 1}-N-(CH{sub 2}){sub n}-R{sub 2}-N-CO-R, where R is 1-oxyl-2,2,6,6-tetramethyl pyrroline bonded at the 3-position, n = 2,3 and R{sub 1,2} = -H; -C{sub 18}{sub 37}; -CH{sub 2}COOH; -CH{sub 2}COOC{sub 2}H{sub 5}; -CH{sub 2}CONH(CH{sub 2}){sub 2}N(CH{sub 3}){sub 2}; -CH{sub 2}CONH(CH{sub 2}){sub 2}N{sup +}(CH{sub 3}) -CH{sub 2}CO-imidazolide.
Date:
November 1, 1969
Creator:
Ferruti, P.; Gill, D.; Klein, M. P.; Wang, H. H.; Entine, G. & Calvin, M.
System:
The UNT Digital Library
A METHOD FOR STATIC-FIELD COMPRESSION IN AN ELECTRON-RING ACCELERATOR
A review of methods for static-field compression of an electron ring is shown to suggest advantages for a method in which there is no axial acceleration or deceleration of the ring. In the method proposed here the static magnetic field itself is o such a character that the electrons are neither focused nor defocused in the axial direction. The integrity and movement of the ring through the compressor is controlled by a small traveling magnetic well. The feasibility of creating such a traveling well is discussed, and an example is presented of a current distribution capable of producing the static magnetic field of the compressor.
Date:
February 20, 1969
Creator:
Laslett, L.Jackson & Sessler, Andrew M.
System:
The UNT Digital Library
CHARGE TRANSFER BETWEEN POSITIVE ALKALI IONS AND ATOMS
The total cross sections for resonant charge exchange have been measured as a function of energy in the range from 10 to 500 eV for the Cs{sup +}-Cs, Rb{sup +}-Rb, and K{sup +}-K systems. The agreement with certain data obtained at higher energies for these systems, and with theoretical cross sections of Smirnov is satisfactory.
Date:
April 1, 1968
Creator:
Gentry, W.R.; Lee, Yuan-tseh & Mahan, Bruce H.
System:
The UNT Digital Library
IRRADIATION OF 3- SUBSTITUTED-2-PHENYLOXAZIRIDINES
It was noted previously that 3-(p-dimethylamino)-2-phenyloxaziridine (I) and 3-(p-dimethylamino)-2-(m-nitrophenyl)oxaziridine were photosensitive. Further study on the irradiation (in a variety of solvents under nitrogen) of (I), 2,3-diphenyloxaziridine (II), and 3-(p-nitrophenyl)-2-phenyloxaziridine (III) indicates the major photoreaction to be cleavage to the aldehyde and an intermediate which forms aniline and azobenzene. There is also formed in the photolysis varying amounts of the corresponding anilide. A table provided gives the yields in three different solvents.
Date:
August 30, 1967
Creator:
Splitter, Janet S. & Calvin, Melvin.
System:
The UNT Digital Library
DEHYDRATION CONDENSATION IN AQUEOUS SOLUTION
EARLIER investigations have demonstrated that di-cyandiamide (DCDA), the dimer of cyanamide, can successfully promote the dehydration condensation of: (1) glucose and orthophosphate to give glucose-6-phosphate; (2) adenosine and orthophosphate to give adenosine-5'-monophosphate; (3) orthophosphate to give pyrophosphate; (4) alanine to give alanylalanine and alanylalanylalanine. These reactions were carried out in dilute aqueous solutions in the dark. (It was also demonstrated that the combination of ultra-violet light and dicyandiamide could promote the synthesis of dipeptides. This observation has since been confirmed by other investigators.) These experiments were designed to demonstrate one possible means by which such compounds could have been formed on the prebiotic Earth, thus providing materials needed for the origin of living systems. Dicyandiamide itself could have been, present on the primitive Earth as was demonstrated with the ultra-violet irradiation of cyanide solution.
Date:
April 1, 1965
Creator:
Steinman, Gary; Kenyon, Dean H. & Calvin, Melvin
System:
The UNT Digital Library
PHOTOSENSITIZED IONIZATION OF ALKALI METAL VAPORS
The vapors of potassium, rubidium, and cesium have been photoionized with light absorbed in the discrete region of the atomic spectrum. The energy threshold for the ionization process has been determined and the ions produced identified by mobility measurements. The data give lower limits for the dissociation energies of K{sup +2}, Rb{sup +2} and Cs{sup +2}. Each of these molecular ions has a bond energy approximately 50% greater than that of the corresponding neutral molecule. In addition, lower limits for the electron affinities of the alkali atoms and approximate values for the mobilities of Rb{sup +} and Rb{sup +2} in rubidium vapor are given.
Date:
February 1, 1965
Creator:
Lee, Yuan-tseh & Mahan, Bruce H.
System:
The UNT Digital Library
[Article for the Johnson/Humphrey Texas Campaigner - 1964-10-05]
Short article to be sent to the Johnson-Humphrey Texas Campaigner describing the contributions of Latin Americans to the campaign, naming the chairmen and co-chairmen and who the speakers were at their first mass meeting in Houston.
Date:
October 5, 1964
Creator:
unknown
System:
The Portal to Texas History
In-reactor corrosion: A paper presented at the 9th annual AEC Corrosion Symposium, Boston, Massachusetts, May 10--12, 1960
Object of this paper is to present preliminary results of experiments in Hanford in-reactor loops to determine if exposure to neutrons will increase corrosion rates of Al alloys, Zy-2, and 304 stainless steel. Results were negligible or no corrosion.
Date:
May 9, 1960
Creator:
Larrick, A. P.
System:
The UNT Digital Library
Management of Radioactive Wastes at the Hanford Plant
Management of radioactive wastes at the Hanford site is presented. Radionuclide migration is also addressed.
Date:
June 16, 1969
Creator:
unknown
System:
The UNT Digital Library
Reactivity Calculations and Measurements at the SRE
None
Date:
September 1, 1963
Creator:
Keaten, R W & Pearson, E N
System:
The UNT Digital Library
Domestic tar sands and potential recovery methods: a review
Present knowledge of United States tar sands, including physical properties, occurrence, reserves, and recovery methods, is reviewed and evaluated. Tar sands are oil-, bitumen-, asphalt-, tar-, or petroleum-impregnated rock from which little hydrocarbon material is recoverable by conventional crude oil production techniques. Tar sand oil has been produced by steam injection and underground combustion techniques and by mining methods. However, efficient application of nonmining recovery techniques is hindered because of difficulties in establishing and maintaining formation permeability. Mining and processing methods being used in or proposed for Canadian commercial operations are also discussed.
Date:
January 1, 1969
Creator:
Spencer, G. B.; Eckard, W. E. & Johnson, F. S.
System:
The UNT Digital Library
Isobaric-spin splitting of nuclear excitations
None
Date:
May 1, 1966
Creator:
Macfarlane, M H
System:
The UNT Digital Library
Cryogenic targets for electron scattering
Over the past few years we have developed a system which allows several different liquid hydrogen and liquid deuterium targets to be placed in the electron beam of the Stanford Mark III accelerator and which can be operated from a remote position. The geometry of our scattering chamber requires that the motion (of the various targets into position) must be in the vertical direction, but that the overall height of the system be constant. These requirements are met by using an internal retractable bellows arrangement to raise and lower the target cells. As many as five cells can be used in conjunction with a single reservoir system.
Date:
June 1, 1963
Creator:
Chambers, B.; Hofstadter, R.; Marcum, A. & Yearian, M. R.
System:
The UNT Digital Library
Optimization of Emission-Limited Thermionic Generators, Paper
No Abstract. There is a duplicate copy.
Date:
August 1, 1961
Creator:
Schock, Alfred
System:
The UNT Digital Library
Some Designer-Oriented Views on Brittle Fracture
No abstract currently available for this document at the current time.
Date:
February 11, 1969
Creator:
Anderson, WE
System:
The UNT Digital Library
FAST BEAM CHOPPERS FOR THE ELECTRON-RING ACCELERATOR
Two beam choppers were constructed which produce an approximately square, 20-ns pulse of 3+-MeV electrons out of the best portion of the 300-ns Astron beam or an 8-{micro}s microwave electron linac beam for injection into the electron-ring accelerator (ERA) compressor. The choppers are impedance-matched traveling-wave devices which deflect the beam with equal strength electric and magnetic forces, and are powered with either three-electrode spark gaps or thyratrons and a 20-ns pulse line. The electron beam is biased out of the beam-transport system with a dc magnetic field, and switched into it with the chopper.
Date:
February 7, 1969
Creator:
Faltens, Andris & Kerns, Cordon.
System:
The UNT Digital Library
The Viscosity of a Liquid Plutonium-Iron Eutectic Alloy
The viscosity of a liquid plutonium-iron eutectic alloy, which contains 9.5 atom per cent iron and melts at 411 degrees C, was determined up to 808 degrees C at Mound Laboratory by an oscillating cup viscosimeter. This type of apparatus employed a right-circular cylindrical cup containing the liquid under investigation attached to a torsion fiber. The dampening effect of the liquid upon the normal oscillations of the pendululm was a function of the viscosity of the liquid. The amplitudes of the oscillations of the pendulum were measured by a photographic technique. The periods of the oscillations were determined by an automatic timing mechanism. The reliability of the viscosimeter was demonstrated by following the expected function of the viscosity of liquid lead and bismuth over a larger temperature range than was previously reported.
Date:
April 1, 1960
Creator:
Wittenberg, L. J., Jones, L. V., Ofte, D.
System:
The UNT Digital Library
The Plutonium-Copper Phase Diagram
The constitution of the plutonium-copper binary alloy as determined by differential thermal analysis is presented. The system is characterized by two congruent melting compounds, PuCu2 (m.p. 865 degrees C.) and Pu4Cu17 (m.p. 954 degrees C.); two incongruent melting compounds, PuCu4 (m.p. 906 degrees C.) and Pu2Cu11 (m.p. 926 degrees C.); three eutectics, 96 atom per cent copper (m.p. 626 degrees), 70.5 atom per cent copper (m.p. 849 degrees C.), and 91 atom per cent copper (m.p. 881 degrees C.); and two peritectics at 75 atom per cent (m.p. 906 degrees C.) and 85.5 atom per cent (m.p. 926 degrees C.). Solid solution was found above 97 atom per cent plutonium. The apparatus, the method of investigation, and the binary alloy phase diagram is discussed.
Date:
January 1, 1960
Creator:
Rhinehammer, T. B.; Etter, D. E. & Jones, L. V.
System:
The UNT Digital Library
Fields and First Order Perturbation Effects in Two-DimensionalConductor Dominated Magnets
General expressions are given for the field and its expansion coefficients produced by a two dimensional conductor structure surrounded by iron with a circular inside boundary. Saturation effects are described in terms of the tangential field at that boundary. The effects of the following types of perturbations are discussed: displacement, rotation and error excitation of a conductor, change of conductor shape, and modification of the inside contour of the iron. A design criterion is given to minimize the error fields associated with a displacement of the iron shell relative to the conductor structure. Expressions for the force and torque acting on a conductor are derived both for the unperturbed and perturbed magnet. Formulae are presented that allow convenient and fast evaluation of pertinent quantities with a computer when the structure is too complicated for hand computations.
Date:
July 1, 1969
Creator:
Halbach, K.
System:
The UNT Digital Library
Absolute Decay Rate from K<sub>2</sub><sup>0</sup>→π<sup>+</sup> + π<sup>-</sup> + π<sup>0</sup> and the barDELTA I over→bar = 1/2 Rule
In this letter the author describes a measurement of the absolute decay rate {Gamma}{sub 2}({+-}0) {approx_equal} {Gamma}(K{sub 2}{sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0}). The result is based on 16 events of the type {pi}{sup -} p {yields} {Lambda}K{sup 0} followed by {Lambda} {yields} p{pi}{sup -} and K{sub 2}{sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0}, and 2608 double-vec events {pi}{sup -} p {yields} {Lambda}K{sup 0} with {Lambda} {yields} p{pi}{sup -} and K{sub 1}{sup 0} {yields} {pi}{sup +}{pi}{sup -}.
Date:
February 4, 1964
Creator:
Stern, Donald; Binford, Thomas O.; Lind, V. Gordon; Anderson, Jared A.; Crawford, Jr, Frank S. & Golden, Robert L.
System:
The UNT Digital Library
Momentum Spectra of Charged Pions Produced in Proton-ProtonInteractions between 13 and 28.5 GeV/c
Proton-proton interactions with four or more charged particles in the final state are studied over a range of incident momenta between 13 and 28.5 GeV/c. Topology cross sections are presented. The center-of-mass momentum distributions of {pi}{sup +} and {pi}{sup -} are determined and are successfully parameterized. The {pi}{sup +} and {pi}{sup -} momentum spectra are found to have approximately the same shape. Multiple fireball production is not required by our data.
Date:
August 1, 1969
Creator:
Smith, Dennis B.; Sprafka, Robert J. & Anderson, Jared A.
System:
The UNT Digital Library
Monochromatic Cosmic Ray Deuterion Source
The reaction pp {yields} {pi}{sup +}d resulting from the high energy cosmic rays incident on the interstellar hydrogen gas gives rise to secondary deuterons. Since the total cross section for this reaction is appreciable only at proton kinetic energies of 600 MeV, the deuterons have a very small spread in energy. It is estimated that the flux of deuterons from this mechanism should be easily discernible from deuterons produced by other reactions and copious enough to be detected at the earth. The narrow deuteron energy distribution could provide an energy calibration for the study of the existence of a postinjection acceleration.
Date:
August 6, 1968
Creator:
Anderson, Jared A.
System:
The UNT Digital Library
A High-Speed Readout for Multi-Channel Pulse-Height Analyzers
From American Nuclear Society Meeting, New York, Nov. 1963. In computer-coupled automated activation analysis such as in the Mark II system, conventional methods of data readout impose a serious restriction on the minimum handling time per sample. A data coupler for operating between the data accumulation system and the computer tape unit was developed which contributes nothing to the handling time per sample, does not distort the data, and prepares the data for direct computer entry. In addition to activation analysis, the coupler may be used to obtain successive spectra separated in time by 0.16 sec in the study of short-lived isotopes. (D.L.C.)
Date:
January 1, 1962
Creator:
Wilkins, W. W.; Fite, L. E. & Wainerdi, R. E.
System:
The UNT Digital Library
Fuel Management in Large Pressurized Water Reactors
Economic and operational ground rules and their effects on fuel management are summarized, and examples showing the approach to typical fuel management problems are presented. The problems associated with in-core fuel management are also discussed, and the merits of various fuel cycling methods are evaluated. (D.C.W.)
Date:
October 31, 1964
Creator:
Dollard, W. J. & Strawbridge, L. E.
System:
The UNT Digital Library