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13,473 Matching Results
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NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts
Copper and cobalt are the key elements in syngas conversion catalyst systems used for higher alcohol synthesis. Their proximity and synergy sensitively control the selectivity and efficiency of the process. It is believed that their outer electronic charge distribution which is responsible for their electrical and magnetic properties might be governing their catalytic properties also. To examine the correlation between catalytic and magnetic properties, a series of copper cobalt catalysts (Co/Cu ratio 5:1 to 5:5) with and without a support were prepared. The nuclear quadrupole resonance spectrum of copper and (zero-field) nuclear magnetic resonance spectrum of cobalt and magnetization and hysteresis character of the catalyst were analyzed. Similar to the catalytic results, the magnetic results also were found to be very sensitive to the preparation technique. The results indicate possible electron exchange between copper and cobalt, and cobalt and the support Titania.
Date:
January 14, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Enhanced durability and reactivity for zinc ferrite desulfurization sorbent
AMAX Research Development Center (AMAX R D) has been investigating methods for enhancing the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hot coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. For the present program, the reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point and at saturation in a bench-scale, fixed-bed reactor. Durability may be defined as the ability of the sorbent to maintain important physical characteristics such As size, strength, and specific surface area during 10 cycles of sulfidation and oxidation.
Date:
November 14, 1988
Creator:
Jha, Mahesh C. & Berggren, Mark H.
Object Type:
Report
System:
The UNT Digital Library
LITERATURE SEARCH ON LEAD-BISMUTH ALLOYS
BS>The use of a lead-bismuth alloy as a coolant in the removal of heat from power-generating nuclear reactors was considered with the possibility that its ternary alloy with uranium or plutonium might be of use in a reactor of the circulating-liquid-fuel type. Information collected from the literature covering phase-equilibrium studies, physicalproperty data, and reactivity of this alloy toward other substances is presented. (auth)
Date:
February 14, 1950
Creator:
Lee, M.E.
Object Type:
Report
System:
The UNT Digital Library
HIVELITE propellant characterization
None
Date:
March 14, 1975
Creator:
Finger, M. & Hayes, B.
Object Type:
Report
System:
The UNT Digital Library
Programmable control system for scanning cylindrical parts
None
Date:
March 14, 1975
Creator:
Neal, R. E.
Object Type:
Report
System:
The UNT Digital Library
Eucalyptus plantations for energy production in Hawaii. Technical status report, October 1, 1978-June 30, 1980
Progress made on accomplishing research objectives is reported. The objectives of this project are: (1) to increase the biomass production of Eucalyptus; (2) to determine the optimum requirements to maximize yield; (3) to assess planting, cultivation, harvesting, and transportation equipment requirements; (4) to determine the optimum mixture of biomass (eucalyptus and bagasse) at the generator for the production of electricity; and (5) to evaluate a complete production/conversion system which utilized optimum management conditions in relationship to costs. (DMC)
Date:
July 14, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
LITHIUM HYDRIDE PROPERTIES
A tabulation is presented of values for selected properties of lithium hydride. (M.C.G.)
Date:
March 14, 1961
Creator:
Welch, F.H.
Object Type:
Report
System:
The UNT Digital Library
Interaction of xenon light with the surface of 304 stainless steel
Laser amplifier frames fabricated from Type 304 stainless steel are known to cause damage to glass lenses by ejecting particles which are deposited on the lenses. High energy pulses of xenon light interact with the steel surface to produce damage sites. Heat treatment and surface cleaning procedures greatly affect the surface stability of the steel and influence contamination generated by the steel. It is believed that inclusions and/or carbides play a role, and the size of damage sites observed on glass correlate with the size of nonmetallic phases in the steel. Thermal etching of the steel was found to be a principle mechanism of surface damage caused by the high energy xenon light.
Date:
February 14, 1978
Creator:
Krenzer, R. W.
Object Type:
Report
System:
The UNT Digital Library
Study of the health effects of bicycling in an urban atmosphere. Final report
This report analyzes data on the health effects of bicycling in an urban environment through intensive study of ten healthy male subjects bicycling or driving in systematically varied conditions in the streets of Washington, D.C. Evaluation criteria for available technology and instrumentation are included and a methodology is developed for route selection. Specific air pollutants (carbon monoxide, ozone, sulfates, nitrates, and particulates) are measured concurrently with exposure and subsequent changes in health status identified through pulmonary function testing, cardiovascular testing, and blood and symptoms analysis. The report concludes that no major adverse short-term health effects were noted for ten healthy male subjects while bicycling or driving in levels of pollution and thermal stress encountered during the study period. Recommendations for further research are also presented.
Date:
October 14, 1977
Creator:
Waldman, M.; Weiss, S. & Articola, W.
Object Type:
Report
System:
The UNT Digital Library
The Proposed Allied Services Act: Summary and Arguments, Pro and Con
This report discusses the purpose of the bill which is to encourage and assist states and localities to develop, demonstrate and evaluate means of improving the utilization and effectiveness of human services through integrated planning, management, and delivery of those services in order to achieve the objectives of personal independence and individual and family economic self-sufficiency.
Date:
November 14, 1975
Creator:
House, Sharon
Object Type:
Report
System:
The UNT Digital Library
The Physician Shortage in Rural America
This report discusses the shortage of physicians in rural areas and factors which have led to the problem as well as possible solutions.
Date:
August 14, 1970
Creator:
Kline, Janet
Object Type:
Report
System:
The UNT Digital Library
Economic Aspects of Reduced Defense Spending, 1960-1970: A Selected Bibliography Arranged Chronologically
This report provides a bibliography of resources related to the economic effects of decreased defense spending which were published between 1960 and 1970.
Date:
April 14, 1970
Creator:
Knight, Edward & Poindexter, Beatrice D.
Object Type:
Report
System:
The UNT Digital Library
Nuclear Disarmament Agreements in Force, 1959-1970: A Brief Summary
This report provides a brief summary the Antarctic Treaty, Outer Space Treaty, Treaty on the Non-Proliferation of Nuclear Weapons, Latin American Nuclear-Free Zone Treaty
Date:
October 14, 1970
Creator:
Mihalchenko, Barbara
Object Type:
Report
System:
The UNT Digital Library
Conscientious Objection and the Constitution: "Welsh v. United States" and Beyond
This report discusses the Supreme Court case "Welsh v. United States" which considered the question of what constituted a religious belief that merited recognition as a conscientious objector. A judicial history of cases related to conscientious objection, analysis of the "Welsh" case, and Congressional options for dealing with the question of conscientious objection requirements are included.
Date:
August 14, 1970
Creator:
Killian, Johny H.
Object Type:
Report
System:
The UNT Digital Library
P.L. 91-296-The Medical Facilities Construction and Modernization Amendments of 1970 and Background Information on the Hill-Burton Program
This report discusses the Medical Facilities Construction and Modernization Act (P.L. 91-296) and the Hill-Burton program of which the bill is a part.
Date:
September 14, 1970
Creator:
Klebe, Edward R.
Object Type:
Report
System:
The UNT Digital Library
Considerations of bunch-spacing options for multi-bunch operation of the Tevatron Collider
This discussion will consider a number of points relevant to limitations, advantages and disadvantages of various arrangements of bunches in the Tevatron proton-antiproton collider. The considerations discussed here will be limited to: (a) bunch spacing symmetry and relation to the relative luminosity at B0 and D0 and the beam-beam interaction with separated beams; (b) bunch spacing constraints imposed by Main Ring RF coalescing and the optics of beam separation at B0 and D0; and (c) bunch spacing constraints imposed by injection and abort kicker timing requirements, and by the Antiproton Source RF unstacking process. 20 figs., 17 tabs.
Date:
December 14, 1989
Creator:
Dugan, G.
Object Type:
Report
System:
The UNT Digital Library
Creep Rupture in the Presence of a Fast Neutron Flux
Possible mechanisms for creep rupture during irradiation are examined. Evidence that the rupture occurs by grain boundary sliding alone, or by vacancy condensation, is compared. It is observed that vacancy condensation is the more probable mechanism, and that this mechanism predicts a reduction in creep rupture life for metals exposed to a fast neutron flux (neglecting effects of radiation annealing). (T.F.H.)
Date:
January 14, 1959
Creator:
Gregory, D. P.
Object Type:
Report
System:
The UNT Digital Library
A sendmail. cf scheme for a large network
Like most large networked sites our users depend heavily on the electronic mail system for both internal and off-site communications. Unfortunately the sendmail.cf file, which is used to control the behavior of the sendmail program, is somewhat cryptic and difficult to decipher for the neophyte. So, on one hand you have a highly visible, frequently used utility, and on the other hand a not-so-easily acquired system administration forte. Here is the sendmail topology of our site, what premises we based it on, and the parts of the sendmail.cf files which support the topology.
Date:
August 14, 1991
Creator:
Darmohray, T.M.
Object Type:
Article
System:
The UNT Digital Library
LLL Geothermal Energy Development Program. Status Report, January 1974--January 1975. [Impulse Turbines, Total Flow Conversion Systems]
None
Date:
February 14, 1975
Creator:
Austin, A. L.
Object Type:
Report
System:
The UNT Digital Library
NQR-NMR studies of higher alcohol synthesis Cu-Co catalysts
The primary objective of the project is to examine the relations between the catalytic and magnetic properties of the copper-cobalt higher alcohol synthesis catalysts. We have undertaken to investigate the magnetic character by studying the Nuclear Quadrupole resonance of copper and (Zerofield) Nuclear Magnetic Resonance of cobalt in copper cobalt catalysts.
Date:
January 14, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Reactor containment analysis for BWR suppression systems. Progress report, April--October 1977
Work during the period included analytic studies of vent clearing and jet-slug dynamics and computer simulations (HEMP and CHAMP codes) of pressure suppression experiments.
Date:
December 14, 1977
Creator:
Edwards, L.L.
Object Type:
Report
System:
The UNT Digital Library
REMOTE DISSOLUTION AND ANALYTICAL PROGRAM FOR IRRADIATED THORIUM
A remote dissolution and analytical program for irradiated thorium is given. The aluminum jacket on the slug was dissolved with 6M nitric acid and 0.005M mercuric nitrate. After a water wash, the thorium dissolution was accomplished with concentrated nitric acid made 0.04M in hydrofluoric acid. Weighing, dissolving, and sampling were done remotely in the multicurie cell at the Idaho Chemical Processing Plant. Handling techniques for weighing and dissolving the slugs are described. Transferring and sampling apparatus as well as sampling techniques for the dissolved material are discussed. Analytical data obtained are tabulated. Abstracts of analytical methods for uranium concentration and isotope ratio, aluminum, thorium, cesium, and cerium are given. (auth)
Date:
July 14, 1961
Creator:
Huff, G. A.; Doggett, I. L.; Fletcher, R. D. & Jacobson, M. E.
Object Type:
Report
System:
The UNT Digital Library
Analysis of LOFT steam generator main feed piping loop seal modification
The stress analysis is presented for the proposed loop seal modification to the LOFT Steam Generator Main Feed Piping. THE SAP IV finite element computer program was used to analyze normal, upset, emergency, and faulted conditions. Results of the analysis indicate that the modified main feed piping system will satisfy all structural adequacy criteria specified in Subarticle NC-3650 of the ASME Boiler and Pressure Vessel Code. Results also show that the isolation snubber configuration, specified in LTR 115-11, will also be adequate for the piping configuration analyzed.
Date:
February 14, 1978
Creator:
Nitzel, M.E.
Object Type:
Report
System:
The UNT Digital Library
ORNL PROCEDURES FOR CONTROLLED-POTENTIAL COULOMETRIC TITRATION OF PLUTONIUM
Six procedures, in stepwise form, that can be used for the determination of plutonium in several forms by controlled-potential coulometric titration are presented. (auth)
Date:
September 14, 1962
Creator:
Shults, W.D.
Object Type:
Report
System:
The UNT Digital Library