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Center for Environmental Kinetics Analysis

Over the past two decades, numerous studies have produced high quality information on the rates at which bacteria can reduce metal oxides. The prototypical study--such as the one depicted to the right--focuses on only a few of the myriad variables affecting the rate. This approach allows for effective dissection of the mechanisms underlying DMRB activity, but, it also produces disjoint information that must be synthesized if we hope to predict the behavior of bacteria at the systems level.
Date: April 5, 2006
Creator: Bandstra, Joel Z.; Burgos, William D. & Peyton, Brent M.
System: The UNT Digital Library

The Feasibility of Solar Powered Water Treatment: A Work In Progress

Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on the feasibility of solar powered water treatment.
Date: April 3, 2008
Creator: Bastian, William & La Point, Thomas W., 1949-
System: The UNT Digital Library

Tuberculosis: Environmental and Individual Indicators: A Work in Progress

Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on tuberculosis (TB) and environmental and individual indicators.
Date: April 3, 2008
Creator: Beatty, Justin & Oppong, Joseph R.
System: The UNT Digital Library

The Effects of Parent Involvement in the Development of Children With Autistic Spectrum Disorders: A Work in Progress

Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on the effects of parent involvement in the development of children with autistic spectrum disorders.
Date: April 3, 2008
Creator: Bonskowski, Marian & Eve, Susan Brown
System: The UNT Digital Library

Stabilization of Plutonium in Subsurface Environments via Microbial Reduction and Biofilm Formation

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+.
Date: April 19, 2007
Creator: Boukhalfa, Hakim; Icopini, Gary A.; Reilly, Sean D. & Neu, Mary P.
System: The UNT Digital Library

The Center for Environmental Kinetics Analysis: an NSF- and DOE-funded Environmental Molecular Science Institute (EMSI) at Penn State

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 …
Date: April 19, 2007
Creator: Brantley, S. L.; Burgos, William D.; Dempsey, Brian A.; Heaney, Peter J.; Kubicki, James D.; Lichtner, Peter C. et al.
System: The UNT Digital Library

Music Therapy and its Effects on Various Medical Patients: A Work in Progress

Poster presentation for the 2009 University Scholars Day at the University of North Texas discussing research on music therapy and its effects on various medical patients.
Date: April 2, 2009
Creator: Christensen, Alexander & Eve, Susan Brown
System: The UNT Digital Library

The Role of Moral Realism in the U.S. Legal System: A Work in Progress

Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing the role of moral realism in the U.S. legal system.
Date: April 3, 2008
Creator: Clark, Gilbert Jon & Figueroa, Robert
System: The UNT Digital Library

Facilitators and Inhibitors to Self-Maintenance for Type II Diabetics [Poster]

Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing facilitators and inhibitors to self-maintenance for type II diabetics.
Date: April 3, 2008
Creator: Davis, Rian E. & Davenport, Beverly
System: The UNT Digital Library

Isotopic Tracers for Biogeochemical Processes and Contaminant Transport: Hanford, Washington

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 …
Date: April 19, 2007
Creator: DePaolo, Donald J.; Christensen, John N.; Conrad, Mark E. & Dresel, and P. Evan
System: The UNT Digital Library

Gender, Trauma, Forgiveness: Correlates of Coping Strategies in HIV+ Adults

This poster examines the relationships between trauma, forgiveness, and gender for the restoration of interpersonal relationships after conflict.
Date: April 22, 2009
Creator: Deaton, Kyle; Vosvick, Mark A. & Hill, Jonathan
System: The UNT Digital Library

Methods of Exoplanet Detection for Amateurs: A Work in Progress

Poster presentation for the 2009 University Scholars Day at the University of North Texas discussing methods of exoplanet detection for amateurs.
Date: April 2, 2009
Creator: Ennis-Fleming, Jasmin & Eve, Susan Brown
System: The UNT Digital Library

Applying EMSL Capabilities to Biogeochemistry and Environmental Research

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.
Date: April 19, 2007
Creator: Felmy, Andy
System: The UNT Digital Library

Movement: An Actor's Challenge from a Dance Perspective - A Work in Progress

Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on movement and an actor's challenge from a dance perspective.
Date: April 3, 2008
Creator: Flowers, D'Erika & Wilson, Timothy
System: The UNT Digital Library

Do residents work too long hours to provide adequate health care? A Work in Progress

Poster presentation for the 2008 University Scholars Day at the University of North Texas discussing research on long hours for medical students during residencies.
Date: April 3, 2008
Creator: Gottlieb, Judd & Eve, Susan Brown
System: The UNT Digital Library

Religious Coping, Self-Esteem, and Locus of Control: Mindfulness in an HIV+ Population

This poster examines how religious coping, self-esteem, and locus of control can affect mindfulness in people living with HIV.
Date: April 22, 2009
Creator: Hill, Jonathan; Vosvick, Mark A. & Hua, William Q.
System: The UNT Digital Library

[Concert Poster: Zanzibar Snails CD release show poster]

Poster advertising a CD release and concert by Zanzibar Snails with Picline, Dust Congress, and Geistheistler on April 4, 2009, at Rubber Gloves Rehearsal Studios, Denton, Texas. Poster features an abstract illustration by Nevada Hill of organic shapes in pink, blue, yellow, and green, with event details in hand drawn lettering.
Date: April 4, 2009
Creator: Hill, Nevada
System: The UNT Digital Library

Bose-Einstein Condensates and their Possible Applications in Quantum Computing and Optical Processing

Poster presentation for the 2008 University Scholars Day at the University of North Texas. This poster discusses research on Bose-Einstein condensates (BECs) and their possible applications in quantum computing and optical processing.
Date: April 3, 2008
Creator: Hodgson, Shane & Eve, Susan Brown
System: The UNT Digital Library

Bank Failure and Its Causes: A Work in Progress

Poster presentation for the 2008 University Scholars Day at the University of North Texas. This poster discusses research on bank failure and its causes. The author's research focuses on the primary influences and characteristics of a collapse. The aim is to enable us to deduce common factors that contribute to bank failure, allowing us to reform and prevent collapses.
Date: April 3, 2008
Creator: Huffman, Thomas & Eve, Susan Brown
System: The UNT Digital Library

Changes in Microbial Community Structure During Biostimulation for Uranium Reduction at Different Levels of Resolution

This poster describes the Changes in Microbial Community Structure During Biostimulation for Uranium Reduction at Different Levels of Resolution
Date: April 19, 2007
Creator: Hwang, C.; Wu, W.-M.; Gentry, T.J.; Corbin, G.; Carley, J.; Carroll, S.L. et al.
System: The UNT Digital Library

Thermodynamic network model for predicting effects of substrate addition and other perturbations on subsurface microbial communities

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.
Date: April 19, 2007
Creator: Istok, Jack; Park, Melora; McKinley, James; Liu, Chongxuan; Krumholz, Lee; Spain, Anne et al.
System: The UNT Digital Library

Child Witnesses of Domestic Violence: Do Adults Really Understand Them?

Poster presentation for the 2009 University Scholars Day at the University of North Texas. This poster discusses research on child witnesses of domestic violence and differences in children's pain and anguish and how parents perceive those emotions.
Date: April 2, 2009
Creator: Jackson, Ryeshia & Murrell, Amy R.
System: The UNT Digital Library

Women's Equality in the European Union -- Promises and Reality: A Work in Progress

Poster presentation for the 2009 University Scholars Day at the University of North Texas discussing women's equality in the European Union (EU).
Date: April 2, 2009
Creator: Jones, Carina & Spencer, Sandra
System: The UNT Digital Library

Molecular-Level Investigations of Nucleation Mechanisms and Kinetics of Formation of Environmental Nanoparticles

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.
Date: April 19, 2007
Creator: Jun, Young-Shin & Waychunas, Glenn A.
System: The UNT Digital Library