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IRON-PHOSPHATE GLASS FOR IMMOBILIZATION OF RADIOACTIVE TECHNETIUM
Technetium-99 (Tc-99) can bring a serious environmental threat because of its high fission yield, long half-life, and high solubility and mobility in the ground water. The present work investigated the immobilization of Tc-99 (surrogated by Re) by heat-treating mixtures of an iron-phosphate glass with 1.5 to 6 wt.% KReO{sub 4} at {approx}1000 C. The Re retention in the glass was as high as {approx}1.2 wt. % while the loss of Re by evaporation during melting was {approx}50%. Re was uniformly distributed within the glass. The normalized Re release by the 7-day Product Consistency Test was {approx}0.39 g/m{sup 2}, comparable with that in phosphate-bonded ceramics and borosilicate glasses. These results suggest that iron-phosphate glass can provide a good matrix for immobilizing Tc-99.
Date:
March 19, 2012
Creator:
AA, KRUGER; PR, HRMA; K, XU; J, CHOI; W, UM & J, HEO
Object Type:
Article
System:
The UNT Digital Library
Drug Related Corruption
This paper explores the relationship between the global drug trade and the corruption of government officials.
Date:
April 19, 2012
Creator:
Adams, Mark & Sahliyeh, Emile F.
Object Type:
Paper
System:
The UNT Digital Library
Drugs and Corruption [Presentation]
Presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the relationship between the global drug trade and the corruption of government officials.
Date:
April 19, 2012
Creator:
Adams, Mark & Sahliyeh, Emile F.
Object Type:
Presentation
System:
The UNT Digital Library
Tank 26F-2F Evaporator Study
Tank 26F supernate sample was sent by Savannah River Remediation to Savannah River National Laboratory for evaporation test to help understand the underlying cause of the recent gravity drain line (GDL) pluggage during operation of the 2F Evaporator system. The supernate sample was characterized prior to the evaporation test. The evaporation test involved boiling the supernate in an open beaker until the density of the concentrate (evaporation product) was between 1.4 to 1.5 g/mL. It was followed by filtering and washing of the precipitated solids with deionized water. The concentrate supernate (or concentrate filtrate), the damp unwashed precipitated solids, and the wash filtrates were characterized. All the precipitated solids dissolved during water washing. A semi-quantitative X-ray diffraction (XRD) analysis on the unwashed precipitated solids revealed their composition. All the compounds with the exception of silica (silicon oxide) are known to be readily soluble in water. Hence, their dissolution during water washing is not unexpected. Even though silica is a sparingly water-soluble compound, its dissolution is also not surprising. This stems from its small fraction in the solids as a whole and also its relative freshness. Assuming similar supernate characteristics, flushing the GDL with water (preferably warm) should facilitate dissolution and …
Date:
December 19, 2012
Creator:
Adu-Wusu, K.
Object Type:
Report
System:
The UNT Digital Library
The effect of oil prices on local aviation and businesses
Presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the effect of oil prices on local aviation and businesses.
Date:
April 19, 2012
Creator:
Al Beayeyz, Sulaiman & Eve, Susan Brown
Object Type:
Presentation
System:
The UNT Digital Library
Classical Conditioning in Everyday Life
Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the positive and negative effects of classical conditioning on a person's psyche.
Date:
April 19, 2012
Creator:
Aldridge, Lauren & Eve, Susan Brown
Object Type:
Poster
System:
The UNT Digital Library
The Gray Wolf and the Endangered Species Act (ESA): A Brief Legal History
This report provides a brief history of the laws, regulations, and lawsuits related to the wolf's protected status. Fuller analyses of the concepts discussed in this report can be found in the companion report.
Date:
January 19, 2012
Creator:
Alexander, Kristina
Object Type:
Report
System:
The UNT Digital Library
The Process of Harvesting Lightning as Electrical Energy
Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the process of harvesting lightning as electrical energy.
Date:
April 19, 2012
Creator:
Andrae, Skylar & Eve, Susan Brown
Object Type:
Poster
System:
The UNT Digital Library
Results of the Excreta Bioassay Quality Control Program for April 1, 2009 through March 31, 2010
A total of 58 urine samples and 10 fecal samples were submitted during the report period (April 1, 2009 through March 31, 2010) to General Engineering Laboratories, South Carolina by the Hanford Internal Dosimetry Program (IDP) to check the accuracy, precision, and detection levels of their analyses. Urine analyses for Sr, 238Pu, 239Pu, 241Am, 243Am 235U, 238U, elemental uranium and fecal analyses for 241Am, 238Pu and 239Pu were tested this year as well as four tissue samples for 238Pu, 239Pu, 241Am and 241Pu. The number of QC urine samples submitted during the report period represented 1.3% of the total samples submitted. In addition to the samples provided by IDP, GEL was also required to conduct their own QC program, and submit the results of analyses to IDP. About 33% of the analyses processed by GEL during the third year of this contract were quality control samples. GEL tested the performance of 21 radioisotopes, all of which met or exceeded the specifications in the Statement of Work within statistical uncertainty (Table 4).
Date:
July 19, 2012
Creator:
Antonio, Cheryl L.
Object Type:
Report
System:
The UNT Digital Library
Results of The Excreta Bioassay Quality Control Program For April 1, 2010 Through March 31, 2011
A total of 76 urine samples and 10 spiked fecal samples were submitted during the report period (April 1, 2010 through March 31, 2011) to GEL Laboratories, LLC in South Carolina by the Hanford Internal Dosimetry Program (IDP) to check the accuracy, precision, and detection levels of their analyses. Urine analyses for 14C, Sr, for 238Pu, 239Pu, 241Am, 243Am, 235U, 238U, 238U-mass and fecal analyses for 241Am, 238Pu and 239Pu were tested this year. The number of QC urine samples submitted during the report period represented 1.1% of the total samples submitted. In addition to the samples provided by IDP, GEL was also required to conduct their own QC program, and submit the results of analyses to IDP. About 31% of the analyses processed by GEL during the first year of contract 112512 were quality control samples. GEL tested the performance of 23 radioisotopes, all of which met or exceeded the specifications in the Statement of Work within statistical uncertainty except the slightly elevated relative bias for 243,244Cm (Table 4).
Date:
July 19, 2012
Creator:
Antonio, Cheryl L.
Object Type:
Report
System:
The UNT Digital Library
The Search for Shalom - In the Midst of Grief
Lecture given Wednesday, September 19, 2012, 10:00 AM at Abilene Christian University: "As humans, we yearn for well-being, wholeness and security in our lives: what the Hebrew Bible calls shalom. Explore how three books – the Song of Songs, Ruth and Lamentations – help us find what we desperately seek."
Date:
September 19, 2012
Creator:
Ashlock, Rodney
Object Type:
Sound
System:
The Portal to Texas History
Can You Hear Me Now? - Learning to Listen to God
Lecture given Wednesday, September 19, 2012, 9:00 AM at Abilene Christian University: "Many today are interested how to discern God's voice in the noise of life. Discover how we might learn to listen for God in our lives."
Date:
September 19, 2012
Creator:
Atchley, Rick
Object Type:
Sound
System:
The Portal to Texas History
Images of The American Indian in Hollywood Film and Impact Upon Identity
Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on images of the American Indian in Hollywood films.
Date:
April 19, 2012
Creator:
Aucoin, Martin & Verrill, Diane
Object Type:
Poster
System:
The UNT Digital Library
Tunable Plasmonic Nanogap Resonator
None
Date:
June 19, 2012
Creator:
BOnd, T.; Bora, M.; Chang, A. & Miles, R.
Object Type:
Article
System:
The UNT Digital Library
Depression and Obesity: Does Depression Cause Obesity, or Obesity Cause Depression, or Both?
Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the relationship between depression and obesity.
Date:
April 19, 2012
Creator:
Battikh, Ahmed H. & Verrill, Diane
Object Type:
Poster
System:
The UNT Digital Library
The Importance of Superstition as Competition Increases
Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the importance of superstition as competition increases.
Date:
April 19, 2012
Creator:
Beavers, Danielle & Eve, Susan Brown
Object Type:
Poster
System:
The UNT Digital Library
Tradition - Building Intimacy or Enmity With God
Lecture given Wednesday, September 19, 2012, 4:00 PM at Abilene Christian University: "The church has a long held love/hate relationship with tradition. Tradition has both brought us together and torn us apart. Is it possible for tradition to help lead us into deeper intimacy with God without dividing the body of Christ?"
Date:
September 19, 2012
Creator:
Beller, Jeremie
Object Type:
Sound
System:
The Portal to Texas History
Factors That Affect Children's Literacy
Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on factors that affect children's literacy.
Date:
April 19, 2012
Creator:
Bellotte, Amy & Eve, Susan Brown
Object Type:
Poster
System:
The UNT Digital Library
Search for Large Extra Dimensions Based on Observations of Neutron Stars with the Fermi-LAT
Large extra dimensions (LED) have been proposed to account for the apparent weakness of gravitation. These theories also indicate that the postulated massive Kaluza-Klein (KK) gravitons may be produced by nucleon-nucleon bremsstrahlung in the course of core collapse of supernovae. Hannestad and Raffelt have predicted energy spectra of gamma ray emission from the decay of KK gravitons trapped by the gravity of the remnant neutron stars (NS). These and other authors have used EGRET data on NS to obtain stringent limits on LED. Fermi-LAT is observing radio pulsar positions obtained from radio and x-ray catalogs. NS with certain characteristics are unlikely emitter of gamma rays, and emit in radio and perhaps x-rays. This talk will focus on the blind analysis we plan to perform, which has been developed using the 1st 2 months of all sky data and Monte Carlo simulations, to obtain limits on LED based on about 1 year of Fermi-LAT data. Preliminary limits from this analysis using these first 2 months of data will be also be discussed.
Date:
September 19, 2012
Creator:
Berenji, Bijan & /Stanford U., Appl. Phys. Dept. /SLAC
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Balancing the Scales - Restoration Through Justice
Lecture given Wednesday, September 19, 2012, 4:00 PM at Abilene Christian University: "Hosea shows how Israel has betrayed God through its inability to grasp the true meaning of Hesed. We return to God and restore our relationship with Him when we reflect His justice in our relationships with others."
Date:
September 19, 2012
Creator:
Bingham, Elizabeth
Object Type:
Sound
System:
The Portal to Texas History
Anti-Bullying Policies in North Texas School Districts and their Protection of GLBT Students
Poster presentation for the 2012 University Scholars Day at the University of North Texas. This poster discusses research on anti-bullying policies in North Texas school districts and their protection of Gay, Lesbian, Bisexual and Transsexual/Transgendered (GLBT) students.
Date:
April 19, 2012
Creator:
Birlew, Payton & Eve, Susan Brown
Object Type:
Poster
System:
The UNT Digital Library
Saudi Arabia: Background and U.S. Relations
This report discusses the current state of the kingdom of Saudi Arabia, its current relationship with the United States, and future initiatives to further develop U.S.-Saudi relations.
Date:
June 19, 2012
Creator:
Blanchard, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
Gap Workshop Report
None
Date:
March 19, 2012
Creator:
Blink, J. A. & Budnitz, R J
Object Type:
Report
System:
The UNT Digital Library
Wanting More Than Entertainment
Lecture given Wednesday, September 19, 2012, 9:00 AM at Abilene Christian University: "Images of intimacy with God parade through scripture. Abraham heard God; David danced as he prayed; and Paul (or his friend) visited heaven! They make it seem so easy. How do the rest of us find God?"
Date:
September 19, 2012
Creator:
Brecheen, Marcus
Object Type:
Sound
System:
The Portal to Texas History