Resource Type

Bridging the Gap in the Chemical Thermodynamic Database for Nuclear Waste Repository: Studies of the Effect of Temperature on Actinide Complexation (open access)

Bridging the Gap in the Chemical Thermodynamic Database for Nuclear Waste Repository: Studies of the Effect of Temperature on Actinide Complexation

Recent results of thermodynamic studies on the complexation of actinides (UO{sub 2}{sup 2+}, NpO{sub 2}{sup +} and Pu{sup 4+}) with F{sup -}, SO{sub 4}{sup 2-} and H{sub 2}PO{sub 4}{sup -}/HPO{sub 4}{sup 2-} at elevated temperatures are reviewed. The data indicate that, for all systems except the 1:1 complexation of Np(V) with HPO{sub 4}{sup 2-}, the complexation of actinides is enhanced by the increase in temperature. The enhancement is primarily due to the increase in the entropy term (T{Delta}S) that exceeds the increase in the enthalpy ({Delta}H) as the temperature is increased. These data bridge the gaps in the chemical thermodynamic database for nuclear waste repository where the temperature could remain significantly higher than 25 C for a long time after the closure of the repository.
Date: December 21, 2009
Creator: Rao, Linfeng; Tian, Guoxin; Xia, Yuanxian; Friese, Judah I.; Zanonato, PierLuigi & Di Bernardo, Plinio
System: The UNT Digital Library
Texas State Office of Risk Management Operating Budget: 2010 (open access)

Texas State Office of Risk Management Operating Budget: 2010

Proposed budget for the Texas State Office of Risk Management outlining projected income and expenditures, with supporting documentation.
Date: December 8, 2009
Creator: Texas. State Office of Risk Management.
System: The Portal to Texas History
FCC Record, Volume 24, No. 17, Pages 14047 to 14901, November 23 - December 31, 2009 (open access)

FCC Record, Volume 24, No. 17, Pages 14047 to 14901, November 23 - December 31, 2009

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: December 2009
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library
Texas Board of Criminal Justice Operating Budget: 2010 (open access)

Texas Board of Criminal Justice Operating Budget: 2010

Operating budget of the Texas Board of Criminal Justice for fiscal year 2010, including an overall summary and budget information organized by specific programs and methods of finance, with information from the previous year for comparison.
Date: December 1, 2009
Creator: Texas. Board of Criminal Justice.
System: The Portal to Texas History
Texas Department of Insurance Operating Budget: 2010 [Summaries] (open access)

Texas Department of Insurance Operating Budget: 2010 [Summaries]

Operating budget submitted by the Texas Department of Insurance for fiscal year 2010, containing summarized schedules of budgeted funds with comparisons to previous fiscal years.
Date: December 1, 2009
Creator: Texas. Department of Insurance.
System: The Portal to Texas History
Texas Department of Licensing and Regulation Operating Budget: 2010 (open access)

Texas Department of Licensing and Regulation Operating Budget: 2010

Operating budget submitted by the Texas Department of Licensing and Regulation with financial summaries detailing expected costs for various agency programs and activities.
Date: December 1, 2009
Creator: Texas. Department of Licensing and Regulation.
System: The Portal to Texas History
Texas Department of Transportation Operating Budget: 2010 (open access)

Texas Department of Transportation Operating Budget: 2010

Operating budget for the Texas Department of Transportation for fiscal year 2010, including summaries of budgeted funds by various criteria, budget schedules, and funding information.
Date: December 1, 2009
Creator: Texas. Department of Transportation.
System: The Portal to Texas History
FCC Record, Volume 24, No. 16, Pages 13202 to 14046, October 26 - November 20, 2009 (open access)

FCC Record, Volume 24, No. 16, Pages 13202 to 14046, October 26 - November 20, 2009

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: November 2009
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library
Texas Legislature Summary of Enactments: 81st Legislature, 1999 (open access)

Texas Legislature Summary of Enactments: 81st Legislature, 1999

Summary of laws passed by the 81st Legislature of Texas, including enacted legislation organized by topic, and an index of passed bills (starting on page 549).
Date: November 2009
Creator: Texas. Legislature. Legislative Council.
System: The Portal to Texas History
Arsenic chemistry in soils and sediments (open access)

Arsenic chemistry in soils and sediments

Arsenic is a naturally occurring trace element that poses a threat to human and ecosystem health, particularly when incorporated into food or water supplies. The greatest risk imposed by arsenic to human health results from contamination of drinking water, for which the World Health Organization recommends a maximum limit of 10 {micro}g L{sup -1}. Continued ingestion of drinking water having hazardous levels of arsenic can lead to arsenicosis and cancers of the bladder, skin, lungs and kidneys. Unfortunately, arsenic tainted drinking waters are a global threat and presently having a devastating impact on human health within Asia. Nearly 100 million people, for example, are presently consuming drinking water having arsenic concentrations exceeding the World Health Organization's recommended limit (Ahmed et al., 2006). Arsenic contamination of the environment often results from human activities such as mining or pesticide application, but recently natural sources of arsenic have demonstrated a devastating impact on water quality. Arsenic becomes problematic from a health perspective principally when it partitions into the aqueous rather than the solid phase. Dissolved concentrations, and the resulting mobility, of arsenic within soils and sediments are the combined result of biogeochemical processes linked to hydrologic factors. Processes favoring the partitioning of As …
Date: October 15, 2009
Creator: Fendorf, S.; Nico, P.; Kocar, B.D.; Masue, Y. & Tufano, K.J.
System: The UNT Digital Library
FCC Record, Volume 24, No. 14, Pages 11509 to 12366, September 1 - October 2, 2009 (open access)

FCC Record, Volume 24, No. 14, Pages 11509 to 12366, September 1 - October 2, 2009

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: October 2009
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library
FCC Record, Volume 24, No. 15, Pages 12367 to 13201, October 5 - October 23, 2009 (open access)

FCC Record, Volume 24, No. 15, Pages 12367 to 13201, October 5 - October 23, 2009

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: October 2009
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library
Open Meetings Handbook, 2010 (open access)

Open Meetings Handbook, 2010

Handbook providing guidance to comply with the Texas Open Meetings Act and "is designed to help public officials avoid unintentional violations of the law and to help all Texans understand how the Open Meetings Acct affects them."
Date: October 2009
Creator: Texas. Attorney-General's Office.
System: The Portal to Texas History
Teacher Retirement System Benefits Handbook (open access)

Teacher Retirement System Benefits Handbook

This document provides retirement and related benefits information for retired teachers.
Date: October 2009
Creator: Teacher Retirement System of Texas
System: The Portal to Texas History
Texas Department of Insurance Operating Budget: 2010 [Details] (open access)

Texas Department of Insurance Operating Budget: 2010 [Details]

Operating budget of the Texas Department of Insurance for fiscal year 2010 showing a breakdown of various budgeted funds by activity and LBB (Legislative Budget Board) codes.
Date: 2009-10~
Creator: Texas. Department of Insurance.
System: The Portal to Texas History
Optimized Volumetric Scanning for X-Ray Array Sources (open access)

Optimized Volumetric Scanning for X-Ray Array Sources

Non-destructive evaluation (NDE) is the science and technology of determining non-invasively the internal structure of manufactured parts, objects, and materials. NDE application areas include medicine, industrial manufacturing, military, homeland security, and airport luggage screening. X-ray measurement systems are most widely used because of their ability to image through a wide range of material densities (from human tissue in medical applications to the dense materials of weapon components). Traditional x-ray systems involve a single source and detector system that rotate and/or translate about the object under evaluation. At each angular location, the source projects x-rays through the object. The rays undergo attenuation proportional to the density of the object's constitutive material. The detector records a measure of the attenuation. Mathematical algorithms are used to invert the forward attenuated ray projection process to form images of the object. This is known as computed tomography (CT). In recent years, the single-source x-ray NDE systems have been generalized to arrays of x-ray sources. Array sources permit multiple views of the object with fewer rotations and translations of the source/detector system. The spatially diverse nature of x-ray array sources has the potential of reducing data collection time, reducing imaging artifacts, and increasing the resolution of …
Date: September 29, 2009
Creator: Lehman, S. K.; Foudray, A. M.; Wang, A.; Kallman, J. S. & Martz, H.
System: The UNT Digital Library
Texas Lottery Commission Operating Budget: 2010 (open access)

Texas Lottery Commission Operating Budget: 2010

Proposed budget for the Texas Lottery Commission outlining projected income and expenditures, with supporting documentation, during fiscal year 2010.
Date: Autumn 2009
Creator: Texas Lottery Commission
System: The Portal to Texas History
The use of microarrays in microbial ecology (open access)

The use of microarrays in microbial ecology

Microarrays have proven to be a useful and high-throughput method to provide targeted DNA sequence information for up to many thousands of specific genetic regions in a single test. A microarray consists of multiple DNA oligonucleotide probes that, under high stringency conditions, hybridize only to specific complementary nucleic acid sequences (targets). A fluorescent signal indicates the presence and, in many cases, the abundance of genetic regions of interest. In this chapter we will look at how microarrays are used in microbial ecology, especially with the recent increase in microbial community DNA sequence data. Of particular interest to microbial ecologists, phylogenetic microarrays are used for the analysis of phylotypes in a community and functional gene arrays are used for the analysis of functional genes, and, by inference, phylotypes in environmental samples. A phylogenetic microarray that has been developed by the Andersen laboratory, the PhyloChip, will be discussed as an example of a microarray that targets the known diversity within the 16S rRNA gene to determine microbial community composition. Using multiple, confirmatory probes to increase the confidence of detection and a mismatch probe for every perfect match probe to minimize the effect of cross-hybridization by non-target regions, the PhyloChip is able to …
Date: September 15, 2009
Creator: Andersen, G. L.; He, Z.; DeSantis, T. Z.; Brodie, E. L. & Zhou, J.
System: The UNT Digital Library
Monodisperse metal nanoparticle catalysts on silica mesoporous supports: synthesis, characterizations, and catalytic reactions (open access)

Monodisperse metal nanoparticle catalysts on silica mesoporous supports: synthesis, characterizations, and catalytic reactions

The design of high performance catalyst achieving near 100% product selectivity at maximum activity is one of the most important goals in the modern catalytic science research. To this end, the preparation of model catalysts whose catalytic performances can be predicted in a systematic and rational manner is of significant importance, which thereby allows understanding of the molecular ingredients affecting the catalytic performances. We have designed novel 3-dimensional (3D) high surface area model catalysts by the integration of colloidal metal nanoparticles and mesoporous silica supports. Monodisperse colloidal metal NPs with controllable size and shape were synthesized using dendrimers, polymers, or surfactants as the surface stabilizers. The size of Pt, and Rh nanoparticles can be varied from sub 1 nm to 15 nm, while the shape of Pt can be controlled to cube, cuboctahedron, and octahedron. The 3D model catalysts were generated by the incorporation of metal nanoparticles into the pores of mesoporous silica supports via two methods: capillary inclusion (CI) and nanoparticle encapsulation (NE). The former method relies on the sonication-induced inclusion of metal nanoparticles into the pores of mesoporous silica, whereas the latter is performed by the encapsulation of metal nanoparticles during the hydrothermal synthesis of mesoporous silica. The …
Date: September 14, 2009
Creator: Somorjai, G.A.
System: The UNT Digital Library
Effortless Healthy Eating. (open access)

Effortless Healthy Eating.

This document is a guide for the Nutrition Education Lesson Code for Effortless Healthy Eating.
Date: September 2009
Creator: Texas. Department of State Health Services.
System: The Portal to Texas History
FCC Record, Volume 24, No. 12, Pages 9699 to 10566, July 31 - August 7, 2009 (open access)

FCC Record, Volume 24, No. 12, Pages 9699 to 10566, July 31 - August 7, 2009

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: August 2009
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library
FCC Record, Volume 24, No. 13, Pages 10567 to 11508, August 10 - August 31, 2009 (open access)

FCC Record, Volume 24, No. 13, Pages 10567 to 11508, August 10 - August 31, 2009

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date: August 2009
Creator: United States. Federal Communications Commission.
System: The UNT Digital Library
Public Information Handbook, 2010 (open access)

Public Information Handbook, 2010

The 2010 Public Information Handbook is a published by the the Office of the Attorney Journal in order to inform "citizens and government officials on their rights and obligations under Texas open government laws." Subject Index starts on page 287.
Date: August 2009
Creator: Texas. Attorney-General's Office.
System: The Portal to Texas History
Thermal neutron imaging in an active interrogation environment (open access)

Thermal neutron imaging in an active interrogation environment

Gain an in-depth understanding of the role of quark flavor.
Date: July 3, 2009
Creator: Jaffe, D. E.; Marciano, W.; Soni, A.; Parsa, Z. & Van de Water,R.
System: The UNT Digital Library