Latest content added for UNT Digital Library Searchhttps://digital2.library.unt.edu/search/?t=fulltext&fq=str_year%3A2007&sort=default2021-02-12T12:43:30-06:00UNT LibrariesThis is a custom feed for searching UNT Digital Library SearchKinetic Controls on the Desorption/Dissolution of Sorbed U(VI) and Their Influence on Reactive Transport2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc895000/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc895000/"><img alt="Kinetic Controls on the Desorption/Dissolution of Sorbed U(VI) and Their Influence on Reactive Transport" title="Kinetic Controls on the Desorption/Dissolution of Sorbed U(VI) and Their Influence on Reactive Transport" src="https://digital.library.unt.edu/ark:/67531/metadc895000/thumbnail/"/></a></p><p>None</p>Development of Modeling Methods and Tools for Predicting Coupled Reactive Transport Processes in Porous Media at Multiple Scales2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc895175/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc895175/"><img alt="Development of Modeling Methods and Tools for Predicting Coupled Reactive Transport Processes in Porous Media at Multiple Scales" title="Development of Modeling Methods and Tools for Predicting Coupled Reactive Transport Processes in Porous Media at Multiple Scales" src="https://digital.library.unt.edu/ark:/67531/metadc895175/thumbnail/"/></a></p><p>None</p>Mechanistically-Based Field-Scale Models of Uranium Biogeochemistry from Upscaling Pore-Scale Experiments and Models2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc894341/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc894341/"><img alt="Mechanistically-Based Field-Scale Models of Uranium Biogeochemistry from Upscaling Pore-Scale Experiments and Models" title="Mechanistically-Based Field-Scale Models of Uranium Biogeochemistry from Upscaling Pore-Scale Experiments and Models" src="https://digital.library.unt.edu/ark:/67531/metadc894341/thumbnail/"/></a></p><p>Effective environmental management of DOE sites requires reliable prediction of reactive transport phenomena. A central issue in prediction of subsurface reactive transport is the impact of multiscale physical, chemical, and biological heterogeneity. Heterogeneity manifests itself through incomplete mixing of reactants at scales below those at which concentrations are explicitly defined (i.e., the numerical grid scale). This results in a mismatch between simulated reaction processes (formulated in terms of average concentrations) and actual processes (controlled by local concentrations). At the field scale, this results in apparent scale-dependence of model parameters and inability to utilize laboratory parameters in field models. Accordingly, most field modeling efforts are restricted to empirical estimation of model parameters by fitting to field observations, which renders extrapolation of model predictions beyond fitted conditions unreliable. The objective of this project is to develop a theoretical and computational framework for (1) connecting models of coupled reactive transport from pore-scale processes to field-scale bioremediation through a hierarchy of models that maintain crucial information from the smaller scales at the larger scales; and (2) quantifying the uncertainty that is introduced by both the upscaling process and uncertainty in physical parameters. One of the challenges of addressing scale-dependent effects of coupled processes in heterogeneous porous media is the problem-specificity of solutions. Much effort has been aimed at developing generalized scaling laws or theories, but these require restrictive assumptions that render them ineffective in many real problems. We propose instead an approach that applies physical and numerical experiments at small scales (specifically the pore scale) to a selected model system in order to identify the scaling approach appropriate to that type of problem. Although the results of such studies will generally not be applicable to other broad classes of problems, we believe that this approach (if applied over time to many types of problems) offers greater potential for long-term progress than attempts to discover a universal solution or theory. We are developing and testing this approach using porous media and model reaction systems that can be both experimentally measured and quantitatively simulated at the pore scale, specifically biofilm development and metal reduction in granular porous media. The general approach we are using in this research follows the following steps: (1) Perform pore-scale characterization of pore geometry and biofilm development in selected porous media systems. (2) Simulate selected reactive transport processes at the pore scale in experimentally measured pore geometries. (3) Validate pore-scale models against laboratory-scale experiments. (4) Perform upscaling to derive continuum-scale (local darcy scale) process descriptions and effective parameters. (5) Use upscaled models and parameters to simulate reactive transport at the continuum scale in a macroscopically heterogeneous medium.</p>Applying EMSL Capabilities to Biogeochemistry and Environmental Research2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc895310/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc895310/"><img alt="Applying EMSL Capabilities to Biogeochemistry and Environmental Research" title="Applying EMSL Capabilities to Biogeochemistry and Environmental Research" src="https://digital.library.unt.edu/ark:/67531/metadc895310/thumbnail/"/></a></p><p>The Environmental Molecular Sciences laboratory (EMSL) is a national scientific user facility operated by the Pacific Northwest National Laboratory (PNNL) for the U.S. Department of Energy's Office of Biological and Environmental Research. Located in Richland, Washington, EMSL offers researchers a comprehensive array of cutting-edge capabilities unmatched anywhere else in the world and access to the expertise of over 300 resident users--all at one location. EMSL's resources are available on a peer-reviewed proposal basis and are offered at no cost if research results are shared in the open literature. Researchers are encouraged to submit a proposal centered around one of EMSL's four Science Themes, which represent growing areas of research: (1) Geochemistry/Biogeochemistry and Subsurface Science; (2) Atmospheric Aerosol Chemistry; (3) Biological Interactions and Dynamics; and (4) Science of Interfacial Phenomena. To learn more about EMSL, visit www.emsl.pnl.gov.</p>Synthesis of Goethite-Coated Sand and Analysis of its Interactions with Uranium2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc901673/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc901673/"><img alt="Synthesis of Goethite-Coated Sand and Analysis of its Interactions with Uranium" title="Synthesis of Goethite-Coated Sand and Analysis of its Interactions with Uranium" src="https://digital.library.unt.edu/ark:/67531/metadc901673/thumbnail/"/></a></p><p>None</p>Changes in Microbial Community Structure During Biostimulation for Uranium Reduction at Different Levels of Resolution2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc893705/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc893705/"><img alt="Changes in Microbial Community Structure During Biostimulation for Uranium Reduction at Different Levels of Resolution" title="Changes in Microbial Community Structure During Biostimulation for Uranium Reduction at Different Levels of Resolution" src="https://digital.library.unt.edu/ark:/67531/metadc893705/thumbnail/"/></a></p><p>This poster describes the Changes in Microbial Community Structure During Biostimulation for Uranium Reduction at Different Levels of Resolution</p>Coupled Processes Influencing the Transport of Uranium over Multiple Scales2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc893101/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc893101/"><img alt="Coupled Processes Influencing the Transport of Uranium over Multiple Scales" title="Coupled Processes Influencing the Transport of Uranium over Multiple Scales" src="https://digital.library.unt.edu/ark:/67531/metadc893101/thumbnail/"/></a></p><p>None</p>Influence of Wetting and Mass Transfer Properties of Organic Chemical Mixtures in Vadose Zone Materials on Groundwater Contamination by Nonaqueous Phase Liquids2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc895933/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc895933/"><img alt="Influence of Wetting and Mass Transfer Properties of Organic Chemical Mixtures in Vadose Zone Materials on Groundwater Contamination by Nonaqueous Phase Liquids" title="Influence of Wetting and Mass Transfer Properties of Organic Chemical Mixtures in Vadose Zone Materials on Groundwater Contamination by Nonaqueous Phase Liquids" src="https://digital.library.unt.edu/ark:/67531/metadc895933/thumbnail/"/></a></p><p>None</p>Biogeochemical Mechanisms Controlling Reduced Radionuclide Particle Properties and Stability2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc893991/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc893991/"><img alt="Biogeochemical Mechanisms Controlling Reduced Radionuclide Particle Properties and Stability" title="Biogeochemical Mechanisms Controlling Reduced Radionuclide Particle Properties and Stability" src="https://digital.library.unt.edu/ark:/67531/metadc893991/thumbnail/"/></a></p><p>None</p>The Center for Environmental Kinetics Analysis: an NSF- and DOE-funded Environmental Molecular Science Institute (EMSI) at Penn State2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc897869/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc897869/"><img alt="The Center for Environmental Kinetics Analysis: an NSF- and DOE-funded Environmental Molecular Science Institute (EMSI) at Penn State" title="The Center for Environmental Kinetics Analysis: an NSF- and DOE-funded Environmental Molecular Science Institute (EMSI) at Penn State" src="https://digital.library.unt.edu/ark:/67531/metadc897869/thumbnail/"/></a></p><p>Physicochemical and microbiological processes taking place at environmental interfaces influence natural processes as well as the transport and fate of environmental contaminants, the remediation of toxic chemicals, and the sequestration of anthropogenic CO2. A team of scientists and engineers has been assembled to develop and apply new experimental and computational techniques to expand our knowledge of environmental kinetics. We are also training a cohort of talented and diverse students to work on these complex problems at multiple length scales and to compile and synthesize the kinetic data. Development of the human resources capable of translating molecular-scale information into parameters that are applicable in real world, field-scale problems of environmental kinetics is a major and relatively unique objective of the Institute's efforts. The EMSI team is a partnership among 10 faculty at The Pennsylvania State University (funded by the National Science Foundation Divisions of Chemistry and Earth Sciences), one faculty member at Juniata College, one faculty member at the University of Florida, and four researchers drawn from Los Alamos National Laboratory, Pacific Northwest National Laboratory, and Lawrence Berkeley National Laboratory (funded by the Department of Energy Division of Environmental Remediation Sciences). Interactions among the applied and academic scientists drives research approaches aimed toward solving important problems of national interest. The Institute is organized into three interest groups (IGs) focusing on the processes of dissolution (DIG), precipitation (PIG), and microbial reactions at surfaces (BIG). Some of the research activity from each IG is highlighted to the right. The IGs interact with each other as each interest group studies reactions across the molecular, microscopic, mesoscopic and, in most cases, field scales. For example, abiotic dissolution and precipitation reactions of Fe oxides as studied in the Dissolution IG provides the baseline for kinetic behavior as the BIG researches the interaction of microorganisms with these same minerals. The attachment of bacteria and redox chemistry that occurs between microorganisms and minerals are critical factors in maintaining groundwater quality and remediation of many toxic waste sites and is one of the main thrusts of research within our EMSI. The IGs also participate in using visualization tools to promote greater understanding of complex environmental data. As a whole, CEKA is also working to compile environmental kinetics data into a cyberinfrastructure and database. The database can be accessed at: http://keystone.ist.psu.edu/.</p>Thermodynamic network model for predicting effects of substrate addition and other perturbations on subsurface microbial communities2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc897628/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc897628/"><img alt="Thermodynamic network model for predicting effects of substrate addition and other perturbations on subsurface microbial communities" title="Thermodynamic network model for predicting effects of substrate addition and other perturbations on subsurface microbial communities" src="https://digital.library.unt.edu/ark:/67531/metadc897628/thumbnail/"/></a></p><p>The overall goal of this project is to develop and test a thermodynamic network model for predicting the effects of substrate additions and environmental perturbations on microbial growth, community composition and system geochemistry. The hypothesis is that a thermodynamic analysis of the energy-yielding growth reactions performed by defined groups of microorganisms can be used to make quantitative and testable predictions of the change in microbial community composition that will occur when a substrate is added to the subsurface or when environmental conditions change.</p>Isotopic Tracers for Biogeochemical Processes and Contaminant Transport: Hanford, Washington2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc899223/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc899223/"><img alt="Isotopic Tracers for Biogeochemical Processes and Contaminant Transport: Hanford, Washington" title="Isotopic Tracers for Biogeochemical Processes and Contaminant Transport: Hanford, Washington" src="https://digital.library.unt.edu/ark:/67531/metadc899223/thumbnail/"/></a></p><p>Our goal is to use isotopic measurements to understand how contaminants are introduced to and stored in the vadose zone, and what processes control migration from the vadose zone to groundwater and then to surface water. We have been using the Hanford Site in south-central Washington as our field laboratory, and our investigations are often stimulated by observations made as part of the groundwater monitoring program and vadose zone characterization activities. Understanding the transport of contaminants at Hanford is difficult due to the presence of multiple potential sources within small areas, the long history of activities, the range of disposal methods, and the continuing evolution of the hydrological system. Observations often do not conform to simple models, and cannot be adequately understood with standard characterization approaches, even though the characterization activities are quite extensive. One of our objectives is to test the value of adding isotopic techniques to the characterization program, which has the immediate potential benefit of addressing specific remediation issues, but more importantly, it allows us to study fundamental processes at the scale and in the medium where they need to be understood. Here we focus on two recent studies at the waste management area (WMA) T-TX-TY, which relate to the sources and transport histories of vadose zone and groundwater contamination and contaminant fluid-sediment interaction. The WMA-T and WMA-TX-TY tank farms are located within the 200 West Area in the central portion of the Hanford Site (Fig. 2). They present a complicated picture of mixed groundwater plumes of nitrate, {sup 99}Tc, Cr{sup 6+}, carbon tetrachloride, etc. and multiple potential vadose zone sources such as tank leaks and disposal cribs (Fig. 3). To access potential vadose zone sources, we analyzed samples from cores C3832 near tank TX-104 and from C4104 near tank T-106. Tank T-106 was involved in a major event in 1973 in which 435,000 L of high activity waste leaked to the vadose zone over a seven-week period. Other nearby tanks (T-103 and T-101) are also suspected of having leaked or overfilled. Pore water from these cores was analyzed for U and Sr isotopic compositions. Increasing {sup 99}Tc concentration in monitoring well 299-W11-39 (to 27,000 pCi/L in 2005) near the northeast corner of the WMA-T area prompted the emplacement of a series of new wells, 299-W11-25B, W11-45 (down gradient), and W11-47 (Fig. 3), during which depth discrete samples were collected below the groundwater surface. The depth profile from W11-25B revealed high {sup 99}Tc concentrations peaking at 182,000 pCi/L at {approx}10 m below the water table (Dresel et al. 2006). We obtained aliquots for isotopic analysis of groundwater samples produced by purge-and-pump sampling during the drilling of W11-25B, -45 and -47. In addition we have analyzed groundwater samples from monitoring wells in the vicinity of WMA T-TX-TY.</p>Stabilization of Plutonium in Subsurface Environments via Microbial Reduction and Biofilm Formation2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc898909/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc898909/"><img alt="Stabilization of Plutonium in Subsurface Environments via Microbial Reduction and Biofilm Formation" title="Stabilization of Plutonium in Subsurface Environments via Microbial Reduction and Biofilm Formation" src="https://digital.library.unt.edu/ark:/67531/metadc898909/thumbnail/"/></a></p><p>Plutonium has a long half-life (2.4 x 104 years) and is of concern because of its chemical and radiological toxicity, high-energy alpha radioactive decay. A full understanding of its speciation and interactions with environmental processes is required in order to predict, contain, or remediate contaminated sites. Under aerobic conditions Pu is sparingly soluble, existing primarily in its tetravalent oxidation state. To the extent that pentavalent and hexavalent complexes and small colloidal species form they will increase the solubility and resultant mobility from contamination sources. There is evidence that in both marine environments and brines substantial fractions of the plutonium in solution is present as hexavalent plutonyl, PuO2 2+.</p>Multi-Scale Mass Transfer Processes Controlling Natural Attenuation and Engineered Remediation: An IFC Focused on Hanford’s 300 Area Uranium Plume2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc900452/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc900452/"><img alt="Multi-Scale Mass Transfer Processes Controlling Natural Attenuation and Engineered Remediation: An IFC Focused on Hanford’s 300 Area Uranium Plume" title="Multi-Scale Mass Transfer Processes Controlling Natural Attenuation and Engineered Remediation: An IFC Focused on Hanford’s 300 Area Uranium Plume" src="https://digital.library.unt.edu/ark:/67531/metadc900452/thumbnail/"/></a></p><p>None</p>Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc902611/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc902611/"><img alt="Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides" title="Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides" src="https://digital.library.unt.edu/ark:/67531/metadc902611/thumbnail/"/></a></p><p>Remediation and long-term stewardship of uranium-contaminated sediments and groundwaters are critical problems at a number of DOE facilities and mining sites. Some remediation strategies based on in-situ bioreduction of U are potentially effective in significantly decreasing U concentrations in groundwaters. However, a number of basic processes require understanding in order to identify conditions more conducive to success of reduction-based U stabilization. Our current research targets several of these issues including: (1) effects of organic carbon (OC) forms and supply rates on stability of bioreduced U, (2) the roles of Fe(III)- and Mn(III,IV)-oxides as potential U oxidants in sediments, and (3) microbial community changes in relation to U redox changes. These issues were identified in our previous study on U bioreduction and reoxidation (Wan et al., 2005). Most of our studies are being conducted on historically U-contaminated sediments from Area 2 of the Field Research Center, Oak Ridge National Laboratory, in flow-through columns simulating in-situ field remediation.</p>Molecular-Level Investigations of Nucleation Mechanisms and Kinetics of Formation of Environmental Nanoparticles2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc902080/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc902080/"><img alt="Molecular-Level Investigations of Nucleation Mechanisms and Kinetics of Formation of Environmental Nanoparticles" title="Molecular-Level Investigations of Nucleation Mechanisms and Kinetics of Formation of Environmental Nanoparticles" src="https://digital.library.unt.edu/ark:/67531/metadc902080/thumbnail/"/></a></p><p>Environmental nanoparticles are often poorly-crystalline or metastable structures, whose kinetics of formation and growth are poorly understood. Further, the sorption or growth of nanoparticles on mineral surfaces may control the mineral surface's reactivity and modify its ability to influence contaminant transport. Due to the characteristic length scale, a holistic understanding of the nucleation mechanisms and kinetics of nanoparticle formation on mineral surfaces is difficult to achieve with traditional methodology. In this work, our intent is to determine the molecular nature of nucleation on surfaces, the kinetics of surface nucleation and growth, and the effect of crystal surface topology using new synchrotron-based techniques. We have approached these objectives by: (1) combining state-of-the-art crystal-truncation rod diffraction (CTR) and grazing incidence x-ray absorption fine structure spectroscopy (GIXAS) techniques to investigate the three-dimensional molecular-scale geometry of silicate monomer sorption on the r-plane of hematite; and (2) developing a new grazing-incidence small angle x-ray scattering (GISAXS) setup at SSRL (0.08 nm{sup -1} < q < 8 nm{sup -1}) to explore the initial development of environmental nanoparticles on various mineral surfaces. This study also includes complementary techniques such as atomic force microscopy (AFM), bulk SAXS, dynamic light scattering (DLS), XRD, and TEM.</p>Optical Durability of Candidate Solar Reflector Materials2016-09-22T02:13:12-05:00https://digital.library.unt.edu/ark:/67531/metadc883941/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc883941/"><img alt="Optical Durability of Candidate Solar Reflector Materials" title="Optical Durability of Candidate Solar Reflector Materials" src="https://digital.library.unt.edu/ark:/67531/metadc883941/thumbnail/"/></a></p><p>None</p>Parabolic Trough Receiver Heat Loss Testing (Poster)2016-09-22T02:13:12-05:00https://digital.library.unt.edu/ark:/67531/metadc891255/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc891255/"><img alt="Parabolic Trough Receiver Heat Loss Testing (Poster)" title="Parabolic Trough Receiver Heat Loss Testing (Poster)" src="https://digital.library.unt.edu/ark:/67531/metadc891255/thumbnail/"/></a></p><p>Parabolic trough receivers, or heat collection elements (HCEs), absorb sunlight focused by the mirrors and transfer that thermal energy to a fluid flowing within them. Thje absorbing tube of these receivers typically operates around 400 C (752 F). HCE manufacturers prevent thermal loss from the absorbing tube to the environment by using sputtered selective Cermet coatings on the absorber and by surrounding the absorber with a glass-enclosed evacuated annulus. This work quantifies the heat loss of the Solel UVAC2 and Schott PTR70 HCEs. At 400 C, the HCEs perform similarly, losing about 400 W/m of HCE length. To put this in perspective, the incident beam radiation on a 5 m mirror aperture is about 4500 W/m, with about 75% of that energy ({approx} 3400 W/m) reaching the absorber surface. Of the 3400 W/m on the absorber, about 3000 W/m is absorbed into the working fluid while 400 W/m is lost to the environment.</p>[Choctaw History event flyer]2020-01-27T07:19:23-06:00https://digital.library.unt.edu/ark:/67531/metadc1609369/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1609369/"><img alt="[Choctaw History event flyer]" title="[Choctaw History event flyer]" src="https://digital.library.unt.edu/ark:/67531/metadc1609369/thumbnail/"/></a></p><p>Event flyer for Choctaw History, hosted by the University of North Texas Multicultural Center that was held in the University's Union building, Room 417 on March 7, 2007 at 2:00 pm.</p>33.207488 -97.152586[2007 Hispanic Heritage Month event posters]2020-02-05T22:23:14-06:00https://digital.library.unt.edu/ark:/67531/metadc1612735/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1612735/"><img alt="[2007 Hispanic Heritage Month event posters]" title="[2007 Hispanic Heritage Month event posters]" src="https://digital.library.unt.edu/ark:/67531/metadc1612735/thumbnail/"/></a></p><p>A document advertising the events at UNT during Hispanic Heritage Month that are hosted by the Multicultural Center. There are two posters for Carnival and one that has a short description about the history of the month.</p>Multicultural-Related Student Organizations 2007-20082020-02-05T22:23:14-06:00https://digital.library.unt.edu/ark:/67531/metadc1612769/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1612769/"><img alt="Multicultural-Related Student Organizations 2007-2008" title="Multicultural-Related Student Organizations 2007-2008" src="https://digital.library.unt.edu/ark:/67531/metadc1612769/thumbnail/"/></a></p><p>A document listing organizations involved and connected with the UNT Multicultural Center. There is also email contact information included with the groups.</p>[Dust Congress, Nouns Group, Zanzibar Snails poster]2019-01-10T21:32:45-06:00https://digital.library.unt.edu/ark:/67531/metadc1401423/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1401423/"><img alt="[Dust Congress, Nouns Group, Zanzibar Snails poster]" title="[Dust Congress, Nouns Group, Zanzibar Snails poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1401423/thumbnail/"/></a></p><p>Poster advertising a concert by Dust Congress, Nouns Group, and Zanzibar Snails on October 11, 2007, at The Public Trust, Dallas, Texas. Poster by artist Nevada Hill features hand-drawn lettering and illustration in red and brown ink on cream paper. The event billed as "Egg Tooth Hatch Party" was on the occasion of the release of Dust Congress' EP, Egg Tooth.</p>32.783853 -96.781231[Lebanon, L'il Tedly, Jetscreamer poster]2019-01-10T21:32:45-06:00https://digital.library.unt.edu/ark:/67531/metadc1401469/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1401469/"><img alt="[Lebanon, L'il Tedly, Jetscreamer poster]" title="[Lebanon, L'il Tedly, Jetscreamer poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1401469/thumbnail/"/></a></p><p>Poster advertising a concert by Lebanon, L'il Tedly, and Jetscreamer on March 19, 2007, at J&J's Pizza, 118 W. Oak, Denton, Texas. Poster features an image of black silhouetted hands centrally converging on a white background with event details overlaid in dark pink text.</p>33.215851 -97.133309[Unwed Sailor, This Will Destroy You, Mom poster]2019-01-10T21:32:45-06:00https://digital.library.unt.edu/ark:/67531/metadc1401365/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1401365/"><img alt="[Unwed Sailor, This Will Destroy You, Mom poster]" title="[Unwed Sailor, This Will Destroy You, Mom poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1401365/thumbnail/"/></a></p><p>Poster advertising a concert by Unwed Sailor, This Will Destroy You, and Mom on December 16th, 2007, at The Cavern, Dallas, Texas. Poster features a blue and green illustration and hand-drawn text.</p>32.813315 -96.770001[Record Hop, White Drugs, Douche poster]2019-01-10T21:32:45-06:00https://digital.library.unt.edu/ark:/67531/metadc1401414/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1401414/"><img alt="[Record Hop, White Drugs, Douche poster]" title="[Record Hop, White Drugs, Douche poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1401414/thumbnail/"/></a></p><p>Poster advertising a concert by Record Hop, White Drugs, and Douche on Saturday, August 18, 2007, at Fra House, Denton, Texas. Poster by artist Nevada Hill features a crudely drawn illustration of a rubber hot water bottle/ douche/ enema bag in reddish-black ink with event details listed in white, hand-drawn text.</p>33.215756 -97.157679[Primordial Undermind, Oveo, Ethereal Plains Indian poster]2019-01-10T21:32:45-06:00https://digital.library.unt.edu/ark:/67531/metadc1401507/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1401507/"><img alt="[Primordial Undermind, Oveo, Ethereal Plains Indian poster]" title="[Primordial Undermind, Oveo, Ethereal Plains Indian poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1401507/thumbnail/"/></a></p><p>Poster advertising a concert by Primordial Undermind with Oveo and Ethereal Plains Indian on Wednesday March 7, 2007 at J&J's on the Square, 118 W. Oak St., Denton, Texas. Poster features the band name "Primordial Undermind" in white text over a fuzzy color photograph, a small image of the band's album in the bottom left corner, and other event details handwritten in purple marker.</p>33.215851 -97.133309[Parade of Flesh x-mas party poster]2019-01-10T21:32:45-06:00https://digital.library.unt.edu/ark:/67531/metadc1401516/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1401516/"><img alt="[Parade of Flesh x-mas party poster]" title="[Parade of Flesh x-mas party poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1401516/thumbnail/"/></a></p><p>Poster advertising the Parade of Flesh x-mas party on December 20, 2007 , at City Tavern, Dallas, Texas, with music performances by Antelope, Attractive & Popular, Balthazar, and El Paso Hot Button. Poster features an illustration of a pink abstract amorphous form with speech bubbles containing the event information in purple text.</p>32.781338 -96.799050Integrating Controlled Vocabularies into Cultural Heritage Digital Collections: The Portal to Texas History Experience [Poster]2010-11-15T19:19:10-06:00https://digital.library.unt.edu/ark:/67531/metadc29286/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc29286/"><img alt="Integrating Controlled Vocabularies into Cultural Heritage Digital Collections: The Portal to Texas History Experience [Poster]" title="Integrating Controlled Vocabularies into Cultural Heritage Digital Collections: The Portal to Texas History Experience [Poster]" src="https://digital.library.unt.edu/ark:/67531/metadc29286/thumbnail/"/></a></p><p>Poster presented at the 2007 ASIS&T Annual Conference. This poster describes the University of North Texas (UNT) Libraries' digital libraries implementations experience. It discusses various scenarios and strategies for integrating controlled vocabularies in the uncontrolled digital library world.</p>Self-Isolation or Distancing: Gender Differences in HIV-Related Coping and Depression2016-08-07T16:03:58-05:00https://digital.library.unt.edu/ark:/67531/metadc856008/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc856008/"><img alt="Self-Isolation or Distancing: Gender Differences in HIV-Related Coping and Depression" title="Self-Isolation or Distancing: Gender Differences in HIV-Related Coping and Depression" src="https://digital.library.unt.edu/ark:/67531/metadc856008/thumbnail/"/></a></p><p>This poster examines the relationships between gender differentiated HIV-related coping strategies and depression.</p>Correlates of Knowledge/Attitudes towards Lesbian, Gay, and Bisexual Individuals2016-08-07T16:03:58-05:00https://digital.library.unt.edu/ark:/67531/metadc855995/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc855995/"><img alt="Correlates of Knowledge/Attitudes towards Lesbian, Gay, and Bisexual Individuals" title="Correlates of Knowledge/Attitudes towards Lesbian, Gay, and Bisexual Individuals" src="https://digital.library.unt.edu/ark:/67531/metadc855995/thumbnail/"/></a></p><p>This poster examines relationships between depression, guilt, and lesbian, gay, and bisexual attitudes/knowledge.</p>Adherence and the Medical Management of HIV/AIDS: Stress and Coping2016-08-07T16:03:58-05:00https://digital.library.unt.edu/ark:/67531/metadc856021/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc856021/"><img alt="Adherence and the Medical Management of HIV/AIDS: Stress and Coping" title="Adherence and the Medical Management of HIV/AIDS: Stress and Coping" src="https://digital.library.unt.edu/ark:/67531/metadc856021/thumbnail/"/></a></p><p>This poster investigates the association of medical adherence to perceived stress, maladaptive coping behaviors, and medical variables in a sample of HIV+ adults.</p>[Concert Poster: Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, Chief Death Rage]2019-01-10T21:32:45-06:00https://digital.library.unt.edu/ark:/67531/metadc1401335/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1401335/"><img alt="[Concert Poster: Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, Chief Death Rage]" title="[Concert Poster: Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, Chief Death Rage]" src="https://digital.library.unt.edu/ark:/67531/metadc1401335/thumbnail/"/></a></p><p>Poster advertising a concert by Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, and Chief Death Rage on November 1, 2007, at Strawberry Fields, Denton, Texas. Poster features hand-drawn block lettering and geometric and figurative illustrations over a split-fountain red and pink background.</p>[Concert Poster: Metrognome Collective Needs You]2021-02-12T12:42:40-06:00https://digital.library.unt.edu/ark:/67531/metadc1755813/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755813/"><img alt="[Concert Poster: Metrognome Collective Needs You]" title="[Concert Poster: Metrognome Collective Needs You]" src="https://digital.library.unt.edu/ark:/67531/metadc1755813/thumbnail/"/></a></p><p>Poster/flyer advertising a concert and live auction benefitting Metrognome Collective on July 14, 2007 at The Chat Room Pub. Featuring Tame...Tame and Quiet, Clint Noisi, and Sarah Reddington with special guests. {{{description}}}</p>[Concert Poster: Dirty Water Disease]2021-02-12T12:43:26-06:00https://digital.library.unt.edu/ark:/67531/metadc1755855/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755855/"><img alt="[Concert Poster: Dirty Water Disease]" title="[Concert Poster: Dirty Water Disease]" src="https://digital.library.unt.edu/ark:/67531/metadc1755855/thumbnail/"/></a></p><p>Poster/flyer advertising a concert by Dirty Water Disease with MOM, Matthew and the Arrogant Sea, Raised by Tigers and Douche on September 4, 2007, at Rubber Gloves.</p>[Concert Poster: The Naptime Shake]2021-02-12T12:43:30-06:00https://digital.library.unt.edu/ark:/67531/metadc1755859/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755859/"><img alt="[Concert Poster: The Naptime Shake]" title="[Concert Poster: The Naptime Shake]" src="https://digital.library.unt.edu/ark:/67531/metadc1755859/thumbnail/"/></a></p><p>Poster/flyer advertising a concert by The Naptime Shake with Matt Bauer and Garrett Pierce on March 20, 2007, at Secret Headquarters in Denton, TX. Poster depicts a red pterodactyl against an off white background carrying a guitar in its mouth flying down to a nest in a tree with two, red pterodactyl babies. Event information is in red text at the bottom of the poster.</p>Hereditary Factors in the Development of Myopia: Work in Progress2012-06-08T10:10:35-05:00https://digital.library.unt.edu/ark:/67531/metadc86124/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc86124/"><img alt="Hereditary Factors in the Development of Myopia: Work in Progress" title="Hereditary Factors in the Development of Myopia: Work in Progress" src="https://digital.library.unt.edu/ark:/67531/metadc86124/thumbnail/"/></a></p><p>Poster presentation for the 2007 University Scholars Day at the University of North Texas discussing research on hereditary factors in the development of myopia.</p>Promoting Uranium Immobilization by the Activities of Microbial Phosphatases2016-09-27T01:39:22-05:00https://digital.library.unt.edu/ark:/67531/metadc901107/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc901107/"><img alt="Promoting Uranium Immobilization by the Activities of Microbial Phosphatases" title="Promoting Uranium Immobilization by the Activities of Microbial Phosphatases" src="https://digital.library.unt.edu/ark:/67531/metadc901107/thumbnail/"/></a></p><p>The overall objective of this project is to examine the activity of nonspecific phosphohydrolases present in naturally occurring subsurface microorganisms for the purpose of promoting the immobilization of radionuclides through the production of uranium [U(VI)] phosphate precipitates. Specifically, we hypothesize that the precipitation of U(VI) phosphate minerals may be promoted through the microbial release and/or accumulation of PO4 3- as a means to detoxify radionuclides and heavy metals. An experimental approach was designed to determine the extent of phosphatase activity in bacteria previously isolated from contaminated subsurface soils collected at the ERSP Field Research Center (FRC) in Oak Ridge, TN. Screening of 135 metal resistant isolates for phosphatase activity indicated the majority (75 of 135) exhibited a phosphatase-positive phenotype. During this phase of the project, a PCR based approach has also been designed to assay FRC isolates for the presence of one or more classes of the characterized non-specific acid phophastase (NSAP) genes likely to be involved in promoting U(VI) precipitation. Testing of a subset of Pb resistant (Pbr) Arthrobacter, Bacillus and Rahnella strains indicated 4 of the 9 Pbr isolates exhibited phosphatase phenotypes suggestive of the ability to bioprecipitate U(VI). Two FRC strains, a Rahnella sp. strain Y9602 and a Bacillus sp. strain Y9-2, were further characterized. The Rahnella sp. exhibited enhanced phosphatase activity relative to the Bacillus sp. Whole-cell enzyme assays identified a pH optimum of 5.5, and inorganic phosphate accumulated in pH 5.5 synthetic groundwater (designed to mimic FRC conditions) incubations of both strains in the presence of a model organophosphorus substrate provided as the sole C and P source. Kinetic experiments showed that these two organisms can grow in the presence of 200 μM dissolved uranium and that Rahnella is much more efficient in precipitating U(VI) than Bacillus sp. The precipitation of U(VI) must be mediated by biological activity as less than 3% soluble U(VI) was removed either from the abiotic or the heat-killed cell controls. Interestingly, the pH has a strong effect on growth and U(VI) biomineralization rates by Rahnella. Thermodynamic modeling identifies autunite-type minerals [Ca(UO2)2(PO4)2] as the precipitate likely formed in the synthetic FRC groundwater conditions at all pH investigated. Extended X-ray absorption fine structure measurements have recently confirmed that the precipitate found in these incubations is an autunite and meta-autunite-type mineral. A kinetic model of U biomineralization at the different pH indicates that hydrolysis of organophosphate can be described using simple Monod kinetics and that uranium precipitation is accelerated when monohydrogen phosphate is the main orthophosphate species in solution. Overall, these experiments and ongoing soil slurry incubations demonstrate that the biomineralization of U(VI) through the activity of phosphatase enzymes can be expressed in a wide range of geochemical conditions pertaining to the FRC site.</p>A DSpace Foundation for a Teaching and Research Commons: The Metadata Education and Research Information Commons2012-10-25T14:42:23-05:00https://digital.library.unt.edu/ark:/67531/metadc111008/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc111008/"><img alt="A DSpace Foundation for a Teaching and Research Commons: The Metadata Education and Research Information Commons" title="A DSpace Foundation for a Teaching and Research Commons: The Metadata Education and Research Information Commons" src="https://digital.library.unt.edu/ark:/67531/metadc111008/thumbnail/"/></a></p><p>Poster presented at the 2007 International Conference on Open Repositories. This poster discusses the Metadata Education and Research Information Commons (MERIC). MERIC originated from an action plan of the Library of Congress and addresses the need to prepare future information professionals to organize and provide access to digital resources.</p>[Paper Chase, This Was the Year to Lose Friends, Memorize poster]2019-08-05T12:44:50-05:00https://digital.library.unt.edu/ark:/67531/metadc1531730/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1531730/"><img alt="[Paper Chase, This Was the Year to Lose Friends, Memorize poster]" title="[Paper Chase, This Was the Year to Lose Friends, Memorize poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1531730/thumbnail/"/></a></p><p>Poster advertising a concert by The Paper Chase, This Was the Year to Lose Friends, and Memorize on Monday, January 22, 2007, at The Conservatory, Oklahoma City, Oklahoma. Poster features an illustration of an antlered girl standing atop a car in a junkyard, surrounded by trees and fireflies at night, printed in shades of blue, black and white.</p>35.561052 -97.531558[Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, Chief Death Rage poster]2019-08-05T12:44:50-05:00https://digital.library.unt.edu/ark:/67531/metadc1531765/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1531765/"><img alt="[Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, Chief Death Rage poster]" title="[Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, Chief Death Rage poster]" src="https://digital.library.unt.edu/ark:/67531/metadc1531765/thumbnail/"/></a></p><p>Poster advertising a concert by Dust Congress, Lil Tedly, Nevada/Seth, Low Red Land, and Chief Death Rage on November 1, 2007, at Strawberry Fields, Denton, Texas. Poster features hand-drawn block lettering and geometric and figurative illustrations over a split-fountain red and pink background.</p>33.215998 -97.161126[Poster: The Big Ball's in Cowtown]2015-05-30T11:39:40-05:00https://texashistory.unt.edu/ark:/67531/metapth611854/<p><a href="https://texashistory.unt.edu/ark:/67531/metapth611854/"><img alt="[Poster: The Big Ball's in Cowtown]" title="[Poster: The Big Ball's in Cowtown]" src="https://texashistory.unt.edu/ark:/67531/metapth611854/thumbnail/"/></a></p><p>Poster containing photographs of people and events held at Cowtown Coliseum from 1907 through 2007 with timeline notes. It includes a large photo of Elvis on the left side of the poster from his 1956 performance and lyrics for a song called "Big Ball's in Cowtown" in the upper-right corner.</p>32.789653 -97.347703[Poster: The Early Years]2015-05-30T11:39:40-05:00https://texashistory.unt.edu/ark:/67531/metapth611814/<p><a href="https://texashistory.unt.edu/ark:/67531/metapth611814/"><img alt="[Poster: The Early Years]" title="[Poster: The Early Years]" src="https://texashistory.unt.edu/ark:/67531/metapth611814/thumbnail/"/></a></p><p>Poster containing photographs of people and events held at Cowtown Coliseum from 1907 through 1997 with timeline notes. It includes a photographs of the coliseum construction and different views of the building along the bottom.</p>32.789653 -97.347703Go For Breakfast, Go For Gold2015-10-28T16:07:58-05:00https://texashistory.unt.edu/ark:/67531/metapth640630/<p><a href="https://texashistory.unt.edu/ark:/67531/metapth640630/"><img alt="Go For Breakfast, Go For Gold" title="Go For Breakfast, Go For Gold" src="https://texashistory.unt.edu/ark:/67531/metapth640630/thumbnail/"/></a></p><p>A poster advertising the school breakfast week Olympics, March 5-9th.</p>My Plate. My Tray. My Health.2015-02-03T20:32:53-06:00https://texashistory.unt.edu/ark:/67531/metapth577574/<p><a href="https://texashistory.unt.edu/ark:/67531/metapth577574/"><img alt="My Plate. My Tray. My Health." title="My Plate. My Tray. My Health." src="https://texashistory.unt.edu/ark:/67531/metapth577574/thumbnail/"/></a></p><p>This document provides information on how to divide ones plate or tray healthily.</p>[Concert Poster: Get The RGRS Look...and don't be a stiff]2021-02-12T12:42:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1755792/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755792/"><img alt="[Concert Poster: Get The RGRS Look...and don't be a stiff]" title="[Concert Poster: Get The RGRS Look...and don't be a stiff]" src="https://digital.library.unt.edu/ark:/67531/metadc1755792/thumbnail/"/></a></p><p>Poster/flyer advertising the concert lineup at Rubber Gloves Rehearsal Studios in Denton, TX from January 18-May 10, 2007.</p>[Concert Poster: Dust Congress]2021-02-12T12:42:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1755794/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755794/"><img alt="[Concert Poster: Dust Congress]" title="[Concert Poster: Dust Congress]" src="https://digital.library.unt.edu/ark:/67531/metadc1755794/thumbnail/"/></a></p><p>Poster/flyer advertising a concert by Dust Congress, Glossary and Sarah Reddington on April 29, 2007, at Hailey's Club in Denton, TX. Poster shows a hand drawn line drawing of a beached whale and lists titles of Dust Congress songs: Midnight @ the beached whale, Seed Eat, Accordian Break, Thankee/Lux, Ms, Banal, kravche, Accordian Break II, The Brown Rat, Ivory, ZNUVIK/Yellowknife pt. II.</p>[Concert Poster: New Sabbath Festival]2021-02-12T12:42:32-06:00https://digital.library.unt.edu/ark:/67531/metadc1755796/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755796/"><img alt="[Concert Poster: New Sabbath Festival]" title="[Concert Poster: New Sabbath Festival]" src="https://digital.library.unt.edu/ark:/67531/metadc1755796/thumbnail/"/></a></p><p>Poster/flyer advertising the New Sabbath Festival featuring Peter and the Wolf, Brothers and Sisters, The Theater Fire, Jana Hunter, New Science Projects, Fishboy, Matthew and the Arrogant Sea, The Black and many others on August 18th, 2007, at J&J's Pizza.</p>[Concert Poster: Gutterth Live: Episode Fourteen]2021-02-12T12:42:46-06:00https://digital.library.unt.edu/ark:/67531/metadc1755818/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755818/"><img alt="[Concert Poster: Gutterth Live: Episode Fourteen]" title="[Concert Poster: Gutterth Live: Episode Fourteen]" src="https://digital.library.unt.edu/ark:/67531/metadc1755818/thumbnail/"/></a></p><p>Poster/flyer advertising the Gutterth Live: Episode Fourteen concert featuring New Science Projects, Ryan Thomas Becker, Joey Kendall and The International on September 29, 2007, at Strawberry Fields.</p>[Concert Poster: New Sabbath Festival]2021-02-12T12:43:22-06:00https://digital.library.unt.edu/ark:/67531/metadc1755850/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755850/"><img alt="[Concert Poster: New Sabbath Festival]" title="[Concert Poster: New Sabbath Festival]" src="https://digital.library.unt.edu/ark:/67531/metadc1755850/thumbnail/"/></a></p><p>Poster/flyer advertising The New Sabbath Festival August 18, 2007. Poster features artwork of angels in the clouds and lists the various performers and venues as well as sponsor and ticket information.</p>[Concert Poster: David Dondero]2021-02-12T12:43:24-06:00https://digital.library.unt.edu/ark:/67531/metadc1755854/<p><a href="https://digital.library.unt.edu/ark:/67531/metadc1755854/"><img alt="[Concert Poster: David Dondero]" title="[Concert Poster: David Dondero]" src="https://digital.library.unt.edu/ark:/67531/metadc1755854/thumbnail/"/></a></p><p>Poster/flyer advertising a concert by David Dondero with The Unfortunate Heads and Mount Righteous on May 10, 2007, at Dan's Silverleaf in Denton, TX. Poster features the album art for Simple Love, a gradient red to yellow background with a painting of David Dondero.</p>