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157 Matching Results
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145 - 157 of
157
Update on Titanium Drip Shield
None
Date:
May 8, 2006
Creator:
Gordon, G.M.; Mon, K. & Hua, F.
System:
The UNT Digital Library
Update on Waste Package Materials Selection, Heat Treatment and Degradation Modes
None
Date:
October 16, 2006
Creator:
Gordon, G. M.
System:
The UNT Digital Library
Upscaling coupled pore-scale reactive transport processes to the continuum scale
None
Date:
April 5, 2006
Creator:
Lichtner, Peter C. & Kang, Qinjun
System:
The UNT Digital Library
Uranium and Neptunium Desorption from Yucca Mountain Alluvium
None
Date:
July 18, 2006
Creator:
Scism, C. D.
System:
The UNT Digital Library
Uranium Reduction by Clostridia
The FRC groundwater and sediment contain significant concentrations of U and Tc and are dominated by low pH, and high nitrate and Al concentrations where dissimilatory metal reducing bacterial activity may be limited. The presence of Clostridia in Area 3 at the FRC site has been confirmed and their ability to reduce uranium under site conditions will be determined. Although the phenomenon of uranium reduction by Clostridia has been firmly established, the molecular mechanisms underlying such a reaction are not very clear. The authors are exploring the hypothesis that U(VI) reduction occurs through hydrogenases and other enzymes (Matin and Francis). Fundamental knowledge of metal reduction using Clostridia will allow us to exploit naturally occurring processes to attenuate radionuclide and metal contaminants in situ in the subsurface. The outline for this report are as follows: (1) Growth of Clostridium sp. under normal culture conditions; (2) Fate of metals and radionuclides in the presence of Clostridia; (3) Bioreduction of uranium associated with nitrate, citrate, and lepidocrocite; and (4) Utilization of Clostridium sp. for immobilization of uranium at the FRC Area 3 site.
Date:
April 5, 2006
Creator:
Francis, A. J.; Dodge, Cleveland J. & Gillow, Jeffrey B.
System:
The UNT Digital Library
Uranium-Series Constraints on Radionuclide Transport and Groundwater Flow Beneath the Nopal I Uranium Deposit, Sierra Pena Blanca, Mexico
None
Date:
April 27, 2006
Creator:
Foldstein, S.; Luo, S.; Ku, R. & Murrell, M.
System:
The UNT Digital Library
Uranium-Series Constraints on Subrepository Water Flow at Yucca Mountain, Nevada
None
Date:
June 1, 2006
Creator:
Neymark, L. A.; Paces, J. B.; Chipera, S. J. & Vaniman, D. T.
System:
The UNT Digital Library
Use of Isotopic Tracers at the Hanford Site
None
Date:
April 5, 2006
Creator:
DePaolo, Don; Conrad, Mark & Christensen, John
System:
The UNT Digital Library
Vision for High Volume Wind Energy Markets
A pre-conference presentation for the AWEA WindPower 2006 Conference in Pittsburgh, PA, about increasing the deployment of wind energy.
Date:
June 1, 2006
Creator:
Thresher, R.
System:
The UNT Digital Library
VTA Prototype Fuel Cell Bus Evaluation: Interim Results
Presentation details the hydrogen fuel cell buses being evaluated in service at AC Transit.
Date:
May 2, 2006
Creator:
Eudy, L.
System:
The UNT Digital Library
Well-Passivated a-Si:H Back Contacts for Double-Heterojunction Silicon Solar Cells
None
Date:
May 1, 2006
Creator:
Page, M.; Iwaniczko, E.; Xu, Y.; Wang, Q.; Yan, Y.; Roybal, L. et al.
System:
The UNT Digital Library
What Color Line? Discrimination and Ethnic Identity
Presentation for the 2006 University Scholars Day at the University of North Texas discussing research on discrimination and ethnic identity.
Date:
March 30, 2006
Creator:
Jones, Andrew & Nuñez-Janes, Mariela
System:
The UNT Digital Library
Wind Shear Characteristics at Central Plains Tall Towers
The objectives of this report are: (1) Analyze wind shear characteristics at tall tower sites for diverse areas in the central plains (Texas to North Dakota)--Turbines hub heights are now 70-100 m above ground and Wind measurements at 70-100+ m have been rare. (2) Present conclusions about wind shear characteristics for prime wind energy development regions.
Date:
June 5, 2006
Creator:
Schwartz, M. & Elliott, D.
System:
The UNT Digital Library