This poster describes the Changes in Microbial Community Structure During Biostimulation for Uranium Reduction at Different Levels of Resolution

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.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on skin care among different age groups.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on correlations between parent's education and children's test scores.

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.

Poster for the play Blues on 125th Street, performed by the Third World Players, written by Bob Ray Sanders, and directed by Curtis L. King. The play was performed on November 19, 1978 at the Dallas Convention Center Theater.

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This poster outlines the recent restructure of the Graduate Library Assistant Program at the University of North Texas Libraries.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on media coverage of modern environmentalism.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on how protein affects health and insight on the benefits and consequences of protein dietary on health.

This poster introduces the lecture series UNT Speaks Out on the Human Library. The "books" at this event are people who have volunteered to challenge prejudice through respectful conversation with members of the UNT campus and the greater Denton community who borrow them for fifteen to thirty minute conversation.

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Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the effects of cocaine in the development of maggots and time of death.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the conceptual and analytical aspects of the integration of nanotechnology into osteopathic medicine and its benefits.

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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 …

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Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on attitudes toward honesty in politics.

Poster for the 2012 University Scholars Day at the University of North Texas discussing the socioeconomics and the ethics of organ donation.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on maternal filicide.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the issue of the well-being of illegal immigrant children.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on preventing, rather than curing, cancer.

Poster for the 2015 Medical Library Association Annual Meeting and Exhibition. This poster discusses recommended library contributions to the retention of premedical students.

Poster presentation for the American Library Association (ALA) Annual Conference, Association of College and Research Libraries (ACRL) Science and Technology Section Program Poster Session. This poster discusses recommended library contributions to Science, Technology, Engineering and Math (STEM) retention based on a Library and Information Science (LIS) interpretation of a landmark study.