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Reduction of pertechnetate by acetohydroxamic acid: Formation of [TcNO(AHA)2(H2O)]+ and implications for the UREX process.
Reductive nitrosylation and complexation of ammonium pertechnetate by acetohydroxamic acid has been achieved in aqueous nitric and perchloric acid solutions. The kinetics of the reaction depend on the relative concentrations of the reaction components and are accelerated at higher temperatures. The reaction does not occur unless conditions are acidic. Analysis of the x-ray absorption fine structure spectroscopic data is consistent with a pseudo-octahedral geometry with the linear Tc-N-O bond typical of technetium nitrosyl compounds, and electron spin resonance spectroscopy is consistent with a the d{sup 5} Tc(II) nitrosyl complex. The nitrosyl source is generally AHA, but may be augmented by products of reaction with nitric acid. The resulting low-valency trans-aquonitrosyl(diacetohydroxamic)-technetium(II) complex (1) is highly soluble in water, extremely hydrophilic, and is not extracted by tri-n-butylphosphate in a dodecane diluent. Its extraction properties are not pH-dependent; titration studies indicate a single species from pH 4.5 down to -0.6 (calculated). This molecule is resistant to oxidation by H{sub 2}O{sub 2}, even at high pH, and can undergo substitution to form other technetium nitrosyl complexes. The formation of 1 may strongly impact the fate of technetium in the nuclear fuel cycle.
Date:
February 26, 2008
Creator:
1Harry Reid Center for Environmental Studies, Nuclear Science and Technology Division, University of Nevada, Las Vegas, Las Vegas, NV, 89154-4006; Gong, Cynthia-May S; Poineau, Frederic; Lukens, Wayne W & Czerwinski, Kenneth R.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.TP0392.0818]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "This corner building and the one adjoining it on the right, located at Northwest Second street and Robinson avenue, were purchased last week by W.T. Laughlin, 2225 Northwest Sixteenth street, as a site for a new two or three-story building."
Date:
February 26, 1938
Creator:
3rd Party
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.TP0392.0839]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "The Oklahoma Dairy Products Co. a new independent company owned by city business men, will open March 1 in this new business office at 3119 South Robinson avenue."
Date:
February 26, 1931
Creator:
3rd Party
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[RE: Enclosed Transcripts of the Regional Institute Directors' Meeting, October 28-31, 1990, Captiva Island, Florida]
A memo from Julie Abel, program associate of the Getty Center for Education in the Arts, to the Regional Insitute Directors, Sheila Brown, Maggie DiBlasio, Edith Curtis Johnson, Anne Lindsey, Nancy MacGregor, Tom McMullen, Nancy Roucher, Joyce Wright, Jack Davis, Dwaine Greer, Phyllis Scott Johnson, Jessie Lovano-Kerr, Bill McCarter, Jeffery Patchen and Frances Thurber. The memo is in regards to an enclosed transcript from the meeting of October 28 - 31, 1990. cc'd on the memo are Ann Bassi, Pamela Glintenkamp, Vicki Rosenberg, Leilani Lattin Duke, Michael Kendall, Mary Ann Stankiewicz.
Date:
February 26, 1991
Creator:
Abel, Juli
Object Type:
Letter
System:
The UNT Digital Library
[RE: Enclosed Transcripts of the Regional Institute Directors' Meeting, October 28-31, 1990, Captiva Island, Florida]
A memo from Julie Abel, program associate of the Getty Center for Education in the Arts, to the Regional Insitute Directors, Sheila Brown, Maggie DiBlasio, Edith Curtis Johnson, Anne Lindsey, Nancy MacGregor, Tom McMullen, Nancy Roucher, Joyce Wright, Jack Davis, Dwaine Greer, Phyllis Scott Johnson, Jessie Lovano-Kerr, Bill McCarter, Jeffery Patchen and Frances Thurber. The memo is in regards to an enclosed transcript from the meeting of October 28 - 31, 1990. cc'd on the memo are Ann Bassi, Pamela Glintenkamp, Vicki Rosenberg, Leilani Lattin Duke, Michael Kendall, Mary Ann Stankiewicz.
Date:
February 26, 1991
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 18, No. 122, Ed. 1 Sunday, February 26, 1933
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes local and campus news along with advertising.
Date:
February 26, 1933
Creator:
Abrams, Samuel K.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Redbird (Beaumont, Tex.), Vol. 3, No. 17, Ed. 1 Friday, February 26, 1954
Weekly newspaper from Lamar State College of Technology in Beaumont, Texas that includes local and campus news along with advertising.
Date:
February 26, 1954
Creator:
Abshier, Ann
Object Type:
Newspaper
System:
The Portal to Texas History
The Breckenridge American (Breckenridge, Tex.), Vol. 9, No. 98, Ed. 1, Tuesday, February 26, 1929
Daily newspaper from Breckenridge, Texas that includes local, state and national news along with extensive advertising.
Date:
February 26, 1929
Creator:
Adair, A. Garland
Object Type:
Newspaper
System:
The Portal to Texas History
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 73, No. 40, Ed. 1 Friday, February 26, 1982
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 26, 1982
Creator:
Adams, Bill
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Harper County Democrat (Buffalo, Okla.), Vol. 8, No. 44, Ed. 1 Friday, February 26, 1915
Weekly newspaper from Buffalo, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 26, 1915
Creator:
Adams, E. Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Pioneer Exponent. (Comanche, Tex.), Vol. 22, No. 26, Ed. 1 Friday, February 26, 1909
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
February 26, 1909
Creator:
Adams, Jesse M.
Object Type:
Newspaper
System:
The Portal to Texas History
The Edmond Enterprise (Edmond, Okla.), Vol. 25, No. 5, Ed. 1 Thursday, February 26, 1925
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 26, 1925
Creator:
Adamson, Royce B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Edmond Enterprise (Edmond, Okla.), Vol. 30, No. 4, Ed. 1 Thursday, February 26, 1931
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 26, 1931
Creator:
Adamson, Royce B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Fifteenth Street News (Midwest City, Okla.), Vol. 21, No. 20, Ed. 1 Friday, February 26, 1993
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 26, 1993
Creator:
Addington, Kathy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 72, No. 40, Ed. 1 Thursday, February 26, 1981
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 26, 1981
Creator:
Adkisson, Larry R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 39, No. 102, Ed. 1 Thursday, February 26, 1953
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 26, 1953
Creator:
Adler, Dot
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oilton Gusher (Oilton, Okla.), Vol. 9, No. 39, Ed. 1 Thursday, February 26, 1925
Weekly newspaper from Oilton, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 26, 1925
Creator:
Admire, Eli L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
High-Level Waste Melter Review
The U.S. Department of Energy (DOE) is faced with a massive cleanup task in resolving the legacy of environmental problems from years of manufacturing nuclear weapons. One of the major activities within this task is the treatment and disposal of the extremely large amount of high-level radioactive (HLW) waste stored at the Hanford Site in Richland, Washington. The current planning for the method of choice for accomplishing this task is to vitrify (glassify) this waste for disposal in a geologic repository. This paper describes the results of the DOE-chartered independent review of alternatives for solidification of Hanford HLW that could achieve major cost reductions with reasonable long-term risks, including recommendations on a path forward for advanced melter and waste form material research and development. The potential for improved cost performance was considered to depend largely on increased waste loading (fewer high-level waste canisters for disposal), higher throughput, or decreased vitrification facility size.
Date:
February 26, 2002
Creator:
Ahearne, J.; Gentilucci, J.; Pye, L. D.; Weber, T.; Woolley, F.; Machara, N. P. et al.
Object Type:
Article
System:
The UNT Digital Library
[Bifurcations and Patterns in Nonlinear Dissifative Systems]
This report discusses the following topics: Rayleigh-Benard convection with an imposed horizontal flow; Rayleigh-Benard convection in a gas under non-boussinesq conditions; electro- convection in a nematic liquid crystal; and Rayleigh-Benard convection in a nematic liquid crystal. (LSP)
Date:
February 26, 1992
Creator:
Ahlers, G. & Cannell, D. S.
Object Type:
Report
System:
The UNT Digital Library
[Bifurcations and Patterns in Nonlinear Dissifative Systems]. Progress Report
This report discusses the following topics: Rayleigh-Benard convection with an imposed horizontal flow; Rayleigh-Benard convection in a gas under non-boussinesq conditions; electro- convection in a nematic liquid crystal; and Rayleigh-Benard convection in a nematic liquid crystal. (LSP)
Date:
February 26, 1992
Creator:
Ahlers, G. & Cannell, D. S.
Object Type:
Report
System:
The UNT Digital Library
Industrial Complex for Solid Radwaste Management at Chernobyle Nuclear Power Plant
In the framework of the preparation for the decommissioning of the Chernobyl Nuclear Power Plant (ChNPP) an Industrial Complex for Solid Radwaste Management (ICSRM) will be built under the EC TACIS Program in the vicinity of ChNPP. The paper will present the proposed concepts and their integration into existing buildings and installations. Further, the paper will consider the safety cases, as well as the integration of Western and Ukrainian Organizations into a cohesive project team and the requirement to guarantee the fulfillment of both Western standards and Ukrainian regulations and licensing requirements. The paper will provide information on the status of the interim design and the effects of value engineering on the output of basic design phase. The paper therefor summarizes the design results of the involved design engineers of the Design and Process Providers BNFL (LOT 1), RWE NUKEM GmbH (LOT 2 and General) and INITEC (LOT 3).
Date:
February 26, 2002
Creator:
Ahner, S. & Fomin, V. V.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0077.0150]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Smoothing rough clay, Vivian Batten, above, works on her figure of a women."
Date:
February 26, 1971
Creator:
Aker, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0111.0313]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
February 26, 1971
Creator:
Aker, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0111.0314]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
February 26, 1971
Creator:
Aker, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History