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The development of precipitated iron catalysts with improved stability (open access)

The development of precipitated iron catalysts with improved stability

The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal liters per hr per gram iron (NL/hr/gFe) using a synthesis gas with 0.5-1.0 H{sub 2}:CO ratio in a slurry reactor.
Date: May 6, 1992
Creator: Abrevaya, H.
Object Type: Report
System: The UNT Digital Library
Advanced /sup 90/Sr space power supply. 250 watt dynamic system (open access)

Advanced /sup 90/Sr space power supply. 250 watt dynamic system

None
Date: September 6, 1973
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Compatibility testing of vitrified waste forms (open access)

Compatibility testing of vitrified waste forms

An experimental program to evaluate candidate metals for use in the fabrication of canisters for long-term storage of vitrified radioactive wastes is described. The long-term compatibility of the candidate metal both with the contained vitrified radioactive waste and with the external environments expected in possible final storage locations will be determined. These tests involve heating combinations of waste forms and canister metals in intimate contact for up to 50,000 hr to accelerate any reactions that occur.
Date: March 6, 1978
Creator: Rankin, W.N.
Object Type: Article
System: The UNT Digital Library
Joining of ceramics for high performance energy systems. Mid-term progress report, August 1, 1979-March 31, 1980 (open access)

Joining of ceramics for high performance energy systems. Mid-term progress report, August 1, 1979-March 31, 1980

The subject program is primarily an exploratory and demonstration study of the use of silicate glass-based adhesives for bonding silicon-base refractory ceramics (SiC, Si/sub 3/N/sub 4/). The projected application is 1250 to 2050/sup 0/F relaxing joint service in high-performance energy conversion systems. The five program tasks and their current status are as follows. Task 1 - Long-Term Joint Stability. Time-temperature-transformation studies of candidate glass adhesives, out to 2000 hours simulated service exposure, are half complete. Task 2 - Environmental and Service Effects on Joint Reliability. Start up delayed due to late delivery of candidate glass fillers and ceramic specimens. Task 3 - Viscoelastic Damping of Glass Bonded Ceramics. Promising results obtained over approximately the same range of glass viscosity required for joint relaxation function (10/sup 7.5/ to 10/sup 9.5/ poise). Work is 90% complete. Task 4 - Crack Arrest and Crack Diversion by Joints. No work started due to late arrival of materials. Task 5 - Improved Joining and Fabrication Methods. Significant work has been conducted in the area of refractory pre-glazing and the application and bonding of high-density candidate glass fillers (by both hand-artisan and slip-spray techniques). Work is half complete.
Date: October 6, 1980
Creator: Smeltzer, C E & Metcalfe, A G
Object Type: Report
System: The UNT Digital Library
Operating manual for the de Phanger precision long counter (PLC) (open access)

Operating manual for the de Phanger precision long counter (PLC)

The setting up, calibration operation, characteristics, and problems of the precision long counter for neutron intensity measurements are discussed. (WHK)
Date: February 6, 1978
Creator: Slaughter, D.
Object Type: Report
System: The UNT Digital Library
Kinetics of the radiation-induced exchange reactions of H/sub 2/, D/sub 2/, and T/sub 2/: a review (open access)

Kinetics of the radiation-induced exchange reactions of H/sub 2/, D/sub 2/, and T/sub 2/: a review

Mixtures of H/sub 2/--T/sub 2/ or D/sub 2/--T/sub 2/ will exchange to produce HT or DT due to catalysis by the tritium ..beta.. particle. The kinetics of the reaction D/sub 2/ + T/sub 2/ = 2DT may play an important role in designing liquid or solid targets of D/sub 2/--DT--T/sub 2/ for implosion fusion, and distillation schemes for tritium cleanup systems in fusion reactors. Accordingly, we have critically reviewed the literature for information on the kinetics and mechanism of radiation-induced self-exchange reactions among the hydrogens. We found data for the reaction H/sub 2/ + T/sub 2/ = 2HT in the gas phase and developed a scheme based on these data to predict the halftime to equilibrium for any gaseous H/sub 2/ + T/sub 2/ mixture at ambient temperature with an accuracy of +-10 percent. The overall order of the H/sub 2/ + T/sub 2/ = 2HT reaction is 1.6 based on an initial rate treatment of the data. The most probable mechanism for radiation-induced self-exchange reaction is an ion-molecule chain mechanism.
Date: January 6, 1978
Creator: Pyper, J.W. & Briggs, C.K.
Object Type: Report
System: The UNT Digital Library
Shiva automatic alignment systems: a brief description (open access)

Shiva automatic alignment systems: a brief description

A diagram is given of the basic Shiva alignment system. The alignment requirements, as originally specified and as preseently estimated, together with the performance obtained to date from the prototype equipment are described. It is expected that this performance will be satisfactory for even the most alignment-sensitive targets and significantly better than is needed for experiments not requiring highly uniform illumination. The hardware arrangement planned for a typical Shiva chain is shown.
Date: September 6, 1977
Creator: Bliss, E. S.; Summers, M. A.; Cody, R. L.; Boyd, R. D. & Wintemute, J. D.
Object Type: Report
System: The UNT Digital Library
The Electoral College; A Selected Bibliography, 1969 (open access)

The Electoral College; A Selected Bibliography, 1969

This report consists of the electoral college.
Date: January 6, 1969
Creator: Dwyer, Paul E.
Object Type: Report
System: The UNT Digital Library
Powers of the President (open access)

Powers of the President

This report is about the powers of the President.
Date: May 6, 1969
Creator: Tansill, William R.
Object Type: Report
System: The UNT Digital Library
Powers Of The President (open access)

Powers Of The President

This report consists of the powers of president.
Date: May 6, 1969
Creator: Tansill, William R.
Object Type: Report
System: The UNT Digital Library
[News Script: Houston schoolboard] (open access)

[News Script: Houston schoolboard]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Learning] (open access)

[News Script: Learning]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Sirhan] (open access)

[News Script: Sirhan]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Track] (open access)

[News Script: Track]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Henry Wade] (open access)

[News Script: Henry Wade]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Boxing and basketball] (open access)

[News Script: Boxing and basketball]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Highway] (open access)

[News Script: Highway]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: November 6, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Apollo Nine] (open access)

[News Script: Apollo Nine]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Prison Rodeo] (open access)

[News Script: Prison Rodeo]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: October 6, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: F-111] (open access)

[News Script: F-111]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Good sewage] (open access)

[News Script: Good sewage]

Script from the WBAP-TV/NBC station in Fort Worth, Texas relating a news story.
Date: March 6, 1969
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[News Script: Belli] (open access)

[News Script: Belli]

Script from the WBAP-TV/NBC station in Fort Worth, Texas, covering a broadcast news story.
Date: December 6, 1968
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Script
System: The UNT Digital Library
[Letter from Cassandra Broadus to Marilyn Ingram, March 6, 1991] (open access)

[Letter from Cassandra Broadus to Marilyn Ingram, March 6, 1991]

Photocopy of a letter from Cassandra Broadus, North Texas Institute for Educators on the Visual Arts, to Marilyn Ingram, Kimbell Art Museum. In regards to the Art-O-Gram art education newspaper series and that the Kimbell will be featured on specific days as followed, March 19, May 7, June 11 and June 18. Broadus also requests to include works from the Kimbell in another article or two for the summer months.
Date: March 6, 1991
Creator: Broadus, Cassandra
Object Type: Letter
System: The UNT Digital Library
[Letter from Cassandra Broadus to Donna Engles, December 6, 1990] (open access)

[Letter from Cassandra Broadus to Donna Engles, December 6, 1990]

Photocopy of a letter from Cassandra Broadus, North Texas Institute for Educators on the Visual Arts, to Donna Engels, Evers Park Elementary School. In regards to an upcoming class visitation on January 8th and how Broadus will plan to present a lesson dealing with winter. Broadus plans on bringing a reproduction of a winter landscape or something visually similar, in order to get the children to talk about the art.
Date: December 6, 1990
Creator: Broadus, Cassandra
Object Type: Letter
System: The UNT Digital Library