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Low-level integrated system test
An unusually wet season permitted us to test the integrity of our biobarrier installed in the improved or modified plots in our integrated system. Although the modified plots had a reduced water-holding capacity, they delivered leachate only at the drain installed above the biobarrier, demonstrating once more that the biobarrier is behaving successfully as a capillary barrier in rerouting the subsurface flow around the tuff beneath the biobarrier. As a result of vertical water flow impedance, more water was made available to plot vegetation, enhancing its growth dramatically. The capillary barrier theory was backed up by the tensiometer results showing saturation at the upper biobarrier interface. 11 refs., 19 figs
Date:
February 1, 1986
Creator:
Abeele, Willy; Nyhan, John; Hakonson, Tom; Drennon, Barry J.; Lopez, Edward A.; Herrera, Wilfred J. et al.
Object Type:
Report
System:
The UNT Digital Library
Exchange of bonded hydrogen in amorphous silicon by deuterium
We show that bonded hydrogen in a-Si:H is readily exchanged by atomic deuterium when exposed to a deuterium plasma discharge. The effective diffusion coefficient for the D,H exchange 10/sup -14/ cm/sup 2//sec at 160/sup 0/C, is comparable to that of interstitial hydrogen in c-Si.
Date:
December 1, 1986
Creator:
Abeles, B.; Yang, L.; Leta, D.P. & Majkrzak, C.F.
Object Type:
Article
System:
The UNT Digital Library
NMR investigations of aging effects in palladium tritide
Using pulsed NMR techniques, relaxation times for triton, proton, and /sup 3/He nuclei in recently synthesized PdH/sub x/ and PdT/sub x/ samples were measured as a function of temperature in the range 100 less than or equal to T less than or equal to 300/sup 0/K. Rigid lattice second moments (T approx. = 100/sup 0/K) were also determined. These results provide baseline information for an extended study of aging effects of PdT/sub x/. 6 refs., 7 figs., 2 tabs.
Date:
January 1, 1986
Creator:
Abell, G.C. & Attalla, A.
Object Type:
Article
System:
The UNT Digital Library
[Abilene City Council Minutes: 1986]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January 9, 1986 to December 18, 1986. A blank index meant for names is included at the front.
Date:
1986-01-09/1986-12-18
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
[Abilene City Ordinances: 1986]
Ledger containing ordinances/resolutions passed by the city of Abilene, Texas during calendar year 1986.
Date:
1986
Creator:
Abilene (Tex.)
Object Type:
Legal Document
System:
The Portal to Texas History
[Abilene City Resolutions: 1986]
Ledger containing resolutions passed by the city of Abilene, Texas during calendar year 1986.
Date:
1986
Creator:
Abilene (Tex.)
Object Type:
Legal Document
System:
The Portal to Texas History
Catalog of Abilene Christian University, 1986-1987
Undergraduate catalog describes the governance, history, academic programs, course descriptions, and campus life of Abilene Christian University in Abilene, Texas.
Date:
1986~
Creator:
Abilene Christian University
Object Type:
Book
System:
The Portal to Texas History
The Pickwicker, Volume 45, Number 1, Spring 1986
The Pickwicker literary magazine of Abilene Christian University includes original short stories, essays, poetry, artwork, and other creative works.
Date:
Spring 1986
Creator:
Abilene Christian University
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Prickly Pear, Yearbook of Abilene Christian University, 1986
Yearbook for Abilene Christian University in Abilene, Texas includes photos of and information about the school, student body, professors, and organizations. Index starts on page 368.
Date:
1986
Creator:
Abilene Christian University
Object Type:
Yearbook
System:
The Portal to Texas History
Abilene Philharmonic Playbill: February 1-March 1, 1986
Program for an Abilene Philharmonic concert that ran from February 1st to March 1st (fifth and sixth concert) during the 36th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
February 1986
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: April 5-April 19, 1986
Program for an Abilene Philharmonic concert that ran from April 5th to April 19th (seventh and eighth concerts) during the 36th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
April 1986
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: September 27-November 1, 1986
Program for an Abilene Philharmonic concert that ran from September 27th to November 1st (first and second concert) during the 37th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
September 1986
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Abilene Philharmonic Playbill: November 22-December 13, 1986
Program for an Abilene Philharmonic concert that ran from November 22nd to December 13th (third and fourth concert) during the 37th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
November 1986
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Stress corrosion cracking tests on high-level-waste container materials in simulated tuff repository environments
Types 304L, 316L, and 321 austenitic stainless steel and Incoloy 825 are being considered as candidate container materials for emplacing high-level waste in a tuff repository. The stress corrosion cracking susceptibility of these materials under simulated tuff repository conditions was evaluated by using the notched C-ring method. The tests were conducted in boiling synthetic groundwater as well as in the steam/air phase above the boiling solutions. All specimens were in contact with crushed Topopah Spring tuff. The investigation showed that microcracks are frequently observed after testing as a result of stress corrosion cracking or intergranular attack. Results showing changes in water chemistry during test are also presented.
Date:
June 1, 1986
Creator:
Abraham, T.; Jain, H. & Soo, P.
Object Type:
Report
System:
The UNT Digital Library
User systems guidelines for software projects
This manual presents guidelines for software standards which were developed so that software project-development teams and management involved in approving the software could have a generalized view of all phases in the software production procedure and the steps involved in completing each phase. Guidelines are presented for six phases of software development: project definition, building a user interface, designing software, writing code, testing code, and preparing software documentation. The discussions for each phase include examples illustrating the recommended guidelines. 45 refs. (DWL)
Date:
April 1, 1986
Creator:
Abrahamson, L. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Transport and Reaction Kinetics at the Glass:Solution Interface Region: Results of Repository-Oriented Leaching Experiments
Repository-oriented leaching experiments involving Savannah River Laboratory (SRL) 165 type glass under a {gamma}-radiation field (1 = 0.2 x 10{sup 4} R/h) have been performed by the Nevada Nuclear Waste Storage Investigations (NNWSI) project. In this communication, we discuss glass surface analyses obtained by SEM, nuclear resonance profiling, and SIMS together with leachate solution data in relation to a mechanism that couples diffusion, hydrolysis (etching and gelation), and precipitation to qualitatively describe the release of different glass components to the leachant solutions. The release of mobile (e.g., Li) and partly mobile (e.g., B) species is controlled primarily by interdiffusion with water species across the interdiffusion zone. Glass components that are immobile in the interdiffusion zone are released to the solution by etching. For prediction of long-term steady-state concentrations of glass components with low solubility, the relative rates of release from the glass and secondary mineral precipitation must be taken into account.
Date:
December 31, 1986
Creator:
Abrajano, T. A., Jr. & Bates, J. K.
Object Type:
Report
System:
The UNT Digital Library
Effect of gamma radiation on groundwater chemistry and glass leaching as related to the NNWSI repository site
To address the effect of ionizing radiation on groundwater chemistry and waste form durability, NNWSI is performing an extensive set of experiments as a function of dose rate (2 x 10{sup 5}, 1 x 10{sup 4}, 1 x 10{sup 3}, and 0 rad/h). The results of the tests done at 2 x 10{sup 5} rad/h have been reported, while the 1 x 10{sup 3} and 0 rad/h tests are in progress. This paper presents an overview of the results of the tests done at 1 x 10{sup 4} rad/h and discusses the relevance of these tests to repository conditions. An interpretation of the results relating to the manner by which the glass waste form corrodes is presented elsewhere. A complete discussion of the effect of gamma radiation on groundwater chemistry and waste form durability will be presented when the series of experiments are complete.
Date:
May 1986
Creator:
Abrajano, T.; Bates, J.; Ebert, W. & Gerding, T.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. Hydrocarbon cutoff hypothesis and developmental needs for a ruthenium catalyst with low light ends selectivity were investigated during this quarter. Hydrocarbon product distribution was Anderson-Schulz-Flory up to a carbon number of 250 and cutoff did not occur with a titania-supported catalyst containing ruthenium particles smaller than 20[Angstrom]. It was found that an alumina-supported catalyst with 1% (by weight) ruthenium in the form of 50[Angstrom] to 100[Angstrom] metal particles was initially about half as active (by catalyst volume) and made one quarter of the amount of C[sub 1][minus]C[sub 4] light end products relative to the Sasol precipitated iron catalyst.
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. During this quarter, the emphasis in the program has been the investigation of the hydrocarbon cutoff hypothesis with supported ruthenium catalysts. An alumina-supported catalyst with smaller than 20[Angstrom] ruthenium particles was tested under conditions of maximal water gas shift activity. During this test more than 90% of the water made in the Fischer-Tropsch synthesis reaction was converted to H[sub 2]. However, the extent of ruthenium metal agglomeration was not reduced. Accordingly, it was not possible to conclude whether hydrocarbon cutoff occurs with smaller than 20[Angstrom] ruthenium particles on [gamma]-alumina. A ruthenium catalyst prepared on Y-type zeolite had 20[Angstrom] or smaller ruthenium particles according to STEM examination and a 15[Angstrom] average ruthenium metal particle size according to EXAFS examination. The ruthenium metal particle size was stable during the test with this catalyst. The hydrocarbon product distribution was Anderson-Schulz-Flory with no cutoff up to a carbon number of 160. A well-dispersed titania-supported ruthenium catalyst is going to be evaluated during the next quarter in order to determine whether …
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst selective to gasoline or diesel range fuel via application of a micelle technique for preparing specific site supported ruthenium particles. The current emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. During this quarter, micelle technique was further improved and 1 ruthenium particle:l reverse micelle limit was approached by careful control of catalyst synthesis conditions. Accordingly, it became possible to synthesize supported particles that closely meet the size and composition targets originally set. This improved technique was applied to synthesis of chemically modified ruthenium catalysts. Some of the chemically modified ruthenium catalysts will be evaluated later in the program. We previously reported that 40--60 [Angstrom] ruthenium particles prepared on [gamma]-alumina do not result in hydrocarbon cutoff. We could not determine then whether smaller ruthenium particles result in hydrocarbon cutoff because these particles agglomerated via ruthenium carbonyl formation during the course of a 6--10 day test. We have recently evaluated a catalyst with 20--40 [Angstrom] ruthenium particles prepared on [gamma]-alumina by carefully analyzing products initially made during the test prior to substantial ruthenium agglomeration. We concluded that cutoff is not effected by …
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst with improved selectivity to gasoline or diesel range fuel via application of a micelle technique for preparing novel supported catalysts with specific size ruthenium particles. The major emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. We previously reported that cutoff is not effected with 40--60 [Angstrom] and 20--40 [Angstrom] ruthenium particles on [gamma]-Al[sub 2]O[sub 3]. We recently tested a catalyst with <20 [Angstrom] ruthenium particles. Well dispersed ruthenium in that catalyst extensively agglomerated to larger particles even during the course of a short test despite the high H[sub 2]:CO ratio used. Therefore, we could not conclude whether cutoff is effected with <20 [Angstrom] ruthenium particles. We are going to continue to evaluate the effect of operational conditions and also evaluate the effect of modifiers on ruthenium agglomeration. A catalyst with <20 [Angstrom] ruthenium particles will be evaluated to investigate occurrence of cutoff, after no agglomeration conditions are identified. We are now proposing to conduct, parallel to the main approach, a second research approach which will aim at developing a ruthenium catalyst with substantially lower light ends selectivity while maintaining at …
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory. [Quarterly report], April 1, 1986--June 30, 1986
The objective of this program is to develop a synthesis gas conversion catalyst with improved selectivity to gasoline or diesel range fuel via application of a micelle technique for preparing novel supported catalysts with specific size ruthenium particles. The major emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. We previously reported that cutoff is not effected with 40--60 {Angstrom} and 20--40 {Angstrom} ruthenium particles on {gamma}-Al{sub 2}O{sub 3}. We recently tested a catalyst with <20 {Angstrom} ruthenium particles. Well dispersed ruthenium in that catalyst extensively agglomerated to larger particles even during the course of a short test despite the high H{sub 2}:CO ratio used. Therefore, we could not conclude whether cutoff is effected with <20 {Angstrom} ruthenium particles. We are going to continue to evaluate the effect of operational conditions and also evaluate the effect of modifiers on ruthenium agglomeration. A catalyst with <20 {Angstrom} ruthenium particles will be evaluated to investigate occurrence of cutoff, after no agglomeration conditions are identified. We are now proposing to conduct, parallel to the main approach, a second research approach which will aim at developing a ruthenium catalyst with substantially lower light ends selectivity while maintaining at …
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory. [Quarterly report], January 1, 1986--March 31, 1986
The objective of this program is to develop a synthesis gas conversion catalyst selective to gasoline or diesel range fuel via application of a micelle technique for preparing specific site supported ruthenium particles. The current emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. During this quarter, micelle technique was further improved and 1 ruthenium particle:l reverse micelle limit was approached by careful control of catalyst synthesis conditions. Accordingly, it became possible to synthesize supported particles that closely meet the size and composition targets originally set. This improved technique was applied to synthesis of chemically modified ruthenium catalysts. Some of the chemically modified ruthenium catalysts will be evaluated later in the program. We previously reported that 40--60 {Angstrom} ruthenium particles prepared on {gamma}-alumina do not result in hydrocarbon cutoff. We could not determine then whether smaller ruthenium particles result in hydrocarbon cutoff because these particles agglomerated via ruthenium carbonyl formation during the course of a 6--10 day test. We have recently evaluated a catalyst with 20--40 {Angstrom} ruthenium particles prepared on {gamma}-alumina by carefully analyzing products initially made during the test prior to substantial ruthenium agglomeration. We concluded that cutoff is not effected by …
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory. Technical progress report, July 1, 1986--September 30, 1986
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. During this quarter, the emphasis in the program has been the investigation of the hydrocarbon cutoff hypothesis with supported ruthenium catalysts. An alumina-supported catalyst with smaller than 20{Angstrom} ruthenium particles was tested under conditions of maximal water gas shift activity. During this test more than 90% of the water made in the Fischer-Tropsch synthesis reaction was converted to H{sub 2}. However, the extent of ruthenium metal agglomeration was not reduced. Accordingly, it was not possible to conclude whether hydrocarbon cutoff occurs with smaller than 20{Angstrom} ruthenium particles on {gamma}-alumina. A ruthenium catalyst prepared on Y-type zeolite had 20{Angstrom} or smaller ruthenium particles according to STEM examination and a 15{Angstrom} average ruthenium metal particle size according to EXAFS examination. The ruthenium metal particle size was stable during the test with this catalyst. The hydrocarbon product distribution was Anderson-Schulz-Flory with no cutoff up to a carbon number of 160. A well-dispersed titania-supported ruthenium catalyst is going to be evaluated during the next quarter in order to determine whether …
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library