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The Sintering And Stability Of Catalytic Nano-Particles, Andrew Delariva Jun 2010

The Sintering And Stability Of Catalytic Nano-Particles, Andrew Delariva

Chemical and Biological Engineering ETDs

Studies were performed on three different catalysts in order to determine their stability and sintering behavior. Pd deposited on a flat single crystal substrate made of Al2O3 was characterized to determine if the mechanism of Ostwald ripening was solely dominated by vapor phase transport of metal atoms. The atoms emitted could be determined by the rate of evaporation and an attempt was then made in order to relate the rates of emission to sintering (instability of nanoparticles). It was found that the rates of emission did not fully reflect vapor phase transport (direct evaporation). The particle-support interaction was increasing the …


Long-Term Desorption Behavior Of Uranium And Neptunium In Heterogeneous Volcanic Tuff Materials, Dean Cynthia Jun 2010

Long-Term Desorption Behavior Of Uranium And Neptunium In Heterogeneous Volcanic Tuff Materials, Dean Cynthia

Chemical and Biological Engineering ETDs

Uranium and neptunium desorption were studied in long-term laboratory experiments using four well-characterized volcanic tuff cores collected from southeast of Yucca Mountain, Nevada. The objectives of the experiments were to 1. Demonstrate a methodology aimed at characterizing distributions of sorption parameters (attributes of multiple sorption sites) that can be applied to moderately-sorbing species in heterogeneous systems to provide more realistic reactive transport parameters and a more realistic approach to modeling transport in heterogeneous systems. 2. Focus on uranium and neptunium because of their high solubility, relatively weak sorption, and high contributions to predicted dose in Yucca Mountain performance assessments. Also, …


Atomic-Level Investigation Of Surface Processes Governing Sige Wetting Layer Formation Using Stm/Sts, Kyle J. Solis Jun 2010

Atomic-Level Investigation Of Surface Processes Governing Sige Wetting Layer Formation Using Stm/Sts, Kyle J. Solis

Chemical and Biological Engineering ETDs

Upon sub-monolayer Ge deposition on the 2xn reconstructed SiGe alloy wetting layer at room temperature, the predominant adspecies observed are so-called addimer chain structures (ADCSs). Polarity-switching scanning tunneling microscopy (STM) is used to study ADCSs, as they only appear in empty-state images. ADCSs are dilute structures comprising type-C addimers that reside in neighboring troughs and extend along all equivalent < 130> directions of the surface, giving rise to a zigzagged morphology. ADCSs exhibit localized movements, wherein their rearrangements are strongly coupled with the structure of the underlying substrate dimers. At elevated temperatures, ADCSs are observed to transition to compact epitaxial segments of …


Airborne Particulate Contamination Effect On High Voltage Breakdowns During Tube Conditioning, Armida J. Carbajal Jun 2010

Airborne Particulate Contamination Effect On High Voltage Breakdowns During Tube Conditioning, Armida J. Carbajal

Mathematics & Statistics ETDs

In this research we examine high voltage breakdowns (HVBs) during neutron tube conditioning which has been a problem for decades. In the recent past there has been much debate on whether or not to procure a real-time airborne monitoring system for the commercial production of neutron tubes in order to determine the effect and calculate the impact of airborne particles. The main problem is, such monitoring system is costly, and with the exact causes of HVBs not being fully known, the expense must be justified. The goal of this thesis was to analyze the instrumentation used in airborne particle monitoring …


Effect Of Solids Retention Time In Membrane Bioreactors On Reverse Osmosis Membrane Fouling, Elizabeth Field Jun 2010

Effect Of Solids Retention Time In Membrane Bioreactors On Reverse Osmosis Membrane Fouling, Elizabeth Field

Civil Engineering ETDs

As sources of clean fresh water diminish, there is an increasing interest in water reuse. Membrane bioreactors (MBRs) are commonly used in wastewater treatment plants, though reuse of treated wastewater for potable purposes requires more advanced treatment. Reverse osmosis (RO), a water treatment process commonly used for drinking water, provides near complete removal of all inorganic and organic constituents from water. While much research has been conducted on both treatment processes, little research has been done on how the combined processes work together in treating wastewater to high enough standards for potable water reuse. The MBR-RO treatment process was studied …


Exposing Sexual Harassment And Bullying In Secondary Schools: An Intersectional Feminist Analysis., Rebecca Erickson Jun 2010

Exposing Sexual Harassment And Bullying In Secondary Schools: An Intersectional Feminist Analysis., Rebecca Erickson

Sociology ETDs

Incidents of sexual harassment and bullying in secondary school are extremely commonplace, yet student experiences are underreported to school officials. Moreover, there are competing definitions regarding what constitutes sexual harassment among administrators, staff, and students. How does social identity influence incidents of sexual harassment and bullying in secondary schools? What kinds of sexual harassment and bullying occur and what are their consequences? How do gender, race/ethnicity, and class affect who is disciplined for sexual harassment and bullying? What role do peers and friends play in the choice to report an incident of sexual harassment? Two distinct school districts are compared, …


Bioadhesion To Model Thermally Responsive Surfaces, Brett J. Andrzejewski Jun 2010

Bioadhesion To Model Thermally Responsive Surfaces, Brett J. Andrzejewski

Chemical and Biological Engineering ETDs

This dissertation focuses on the characterization of two surfaces: mixed self-assembled monolayers (SAMs) of hexa(ethylene glycol) and alkyl thiolates (mixed SAM) and poly(N-isopropylacrylamide) (PNIPAAm). The synthesis of hexa(ethylene gylcol) alkyl thiol (C11EG6OH) is presented along with the mass spectrometry and nuclear magnetic resonance results. The mixed SAM surface was confirmed to be thermally responsive by contact angle goniometry, 35° at 28 °C and 55° at 40 °C. In addition, the mixed SAM surfaces were confirmed to be thermally responsive for various aqueous mediums by tensiometry. Factors such as oxygen, age, and surface mole fraction and how they affect the thermal …


Topology Of Cyclo-Octane Energy Landscape, Evangelos A. Coutsias, Shawn Martin, Aidan Thompson, Jean-Paul Watson Jun 2010

Topology Of Cyclo-Octane Energy Landscape, Evangelos A. Coutsias, Shawn Martin, Aidan Thompson, Jean-Paul Watson

Branch Mathematics and Statistics Faculty and Staff Publications

Understanding energy landscapes is a major challenge in chemistry and biology. Although a wide variety of methods have been invented and applied to this problem, very little is understood about the actual mathematical structures underlying such landscapes. Perhaps the most general assumption is the idea that energy landscapes are low-dimensional manifolds embedded in high-dimensional Euclidean space. While this is a very mild assumption, we have discovered an example of an energy landscape which is nonmanifold, demonstrating previously unknown mathematical complexity. The example occurs in the energy landscape of cyclo-octane, which was found to have the structure of a reducible algebraic …


Unesco Adds Three Sites In Mexico To Its Biosphere-Reserve Network, Ladb Staff Jun 2010

Unesco Adds Three Sites In Mexico To Its Biosphere-Reserve Network, Ladb Staff

SourceMex

No abstract provided.


2010-05-27 Unm News Minute, University Of New Mexico Communication And Marketing Department May 2010

2010-05-27 Unm News Minute, University Of New Mexico Communication And Marketing Department

UNM News Minute 2010

No abstract provided.


2010-05-20 Unm News Minute, University Of New Mexico Communication And Marketing Department May 2010

2010-05-20 Unm News Minute, University Of New Mexico Communication And Marketing Department

UNM News Minute 2010

No abstract provided.


2010-05-06 Unm News Minute, University Of New Mexico Communication And Marketing Department May 2010

2010-05-06 Unm News Minute, University Of New Mexico Communication And Marketing Department

UNM News Minute 2010

No abstract provided.


Gpsa Council Meeting, 5/1/2010, Graduate And Professional Student Association May 2010

Gpsa Council Meeting, 5/1/2010, Graduate And Professional Student Association

GPSA Meeting Agendas and Minutes

No abstract provided.


A Sample Of Rural And Global Health Issues, Carol J. Bett, Barbara Cechanowicz, Demetrius Chapman, Stephen Hernandez, Hannelore Kriegor, Melanie Mayo, Loyce Phoenix, Conrad Rios, Teresa Sellstrom, Max Veltman May 2010

A Sample Of Rural And Global Health Issues, Carol J. Bett, Barbara Cechanowicz, Demetrius Chapman, Stephen Hernandez, Hannelore Kriegor, Melanie Mayo, Loyce Phoenix, Conrad Rios, Teresa Sellstrom, Max Veltman

Global, Rural, & Cultural Health Book Series

The challenges faced by local, national, and global communities in an ever-changing world have continued to grow as we complete the first decade of the 21st century. The doctoral students writing this book undertook the effort with advocacy for disenfranchised populations in mind. This compilation illuminates the challenges and gaps in access to health care confronted by a wide range of people, from overweight children, lesbians, and Native Americans to individuals in rural communities in Papua New Guinea. As the reader can readily see, we are a group of students with wide-ranging experiences and interests.


Taxonomic Implications Of Basicranial Variation In Australopithecus Africanus, Timothy R. Petersen May 2010

Taxonomic Implications Of Basicranial Variation In Australopithecus Africanus, Timothy R. Petersen

Anthropology ETDs

Although it was discovered 85 years ago, Australopithecus africanus remains a source of contention among paleoanthropologists. Uncertainty about the fossils taxonomic unity has resulted in controversy about their place in hominin phylogeny. This work addresses their taxonomy through application of three-dimensional morphometrics followed by analysis of their patterns of variation in traditional morphological characters. This sequential approach lends more support to the conclusions than would either technique alone. The cranial base was selected as the focus of the analyses because it preserves well and is likely to capture taxonomically-important variation. This inference is supported by the finding herein that the …


Alterations In Neuromodulators Of Gabaergic Transmission In The Cerebellar Cortex Of Patients With Schizophrenia, William Michael Bullock May 2010

Alterations In Neuromodulators Of Gabaergic Transmission In The Cerebellar Cortex Of Patients With Schizophrenia, William Michael Bullock

Biomedical Sciences ETDs

One of the most consistent findings in schizophrenia is the dysfunction of specific subsets of GABAergic interneurons in distributed brain regions including the prefrontal cortex and cerebellum. Analyses of post-mortem tissue from cerebellar hemispheres from 13 schizophrenic patients and 13 matched controls by quantitative real-time PCR (qRT-PCR) revealed that the mRNA levels of both the 67 kDa and 65 kDa isoforms of glutamic acid decarboxylase (GAD67 and GAD65) are decreased. Additionally, the presynaptic GABA transporter GAT-1 and the Golgi cell specific neuromodulator metabotropic glutamate receptor 2 (mGluR2) were decreased in the schizophrenic group. Postsynaptic upregulation of GABAA-alpha6 and delta along …


Tracing Deuterium Through The Food Web And Into Birds And Mammals Along An Elevational Gradient In The Southern Rocky Mountains, Matthew J. Baumann May 2010

Tracing Deuterium Through The Food Web And Into Birds And Mammals Along An Elevational Gradient In The Southern Rocky Mountains, Matthew J. Baumann

Biology ETDs

Animals incorporate local δ2H values from available water and dietary sources during tissue synthesis, which can provide evidence of elevational movements if multiple tissues with different turnover times are examined. Here we test the applicability of using δ2H as an indicator of altitudinal movements by examining multiple tissues (δ2Hbw (body water), δ2Hfeather, δ2Hfur, and δ2Hclaw) in birds and mammals in the Sangre de Cristo Mountains. Additionally, we measured δ2Hsw (stem water) and insect δ2bw and δ2wb (whole body) values to assess changes with elevation. We sampled 15 species of birds and two small mammal species along with potential food sources …


Dispersal, Facilitation, And Burrow Architecture In Banner-Tailed Kangaroo Rats, Andrew J. Edelman May 2010

Dispersal, Facilitation, And Burrow Architecture In Banner-Tailed Kangaroo Rats, Andrew J. Edelman

Biology ETDs

The largest and most dominant kangaroo rat species in the Chihuahuan Desert is the banner-tailed kangaroo rat (Dipodomys spectabilis). This keystone species constructs mounds containing a complex burrow system around which their ecosystem engineering activities are centered. I studied a population of banner-tailed kangaroo rats at the Sevilleta National Wildlife Refuge, New Mexico from 2005-2009. Specifically, I examined how banner-tailed kangaroo rats: 1) modify their mounds in response to seasonal conditions; 2) spatially affect harvester ants (Pogonomyrmex rugosus) through ecosystem engineering activities; and 3) differ in timing of natal dispersal between sexes. I used mark-recapture, genetic, experimental, and spatially-explicit methods …


Respiratory Physiology During Gravidity In Crotaphytus Collaris And Gambelia Wislizenii, Casey Anderson Gilman May 2010

Respiratory Physiology During Gravidity In Crotaphytus Collaris And Gambelia Wislizenii, Casey Anderson Gilman

Biology ETDs

During gravidity lizards experience a significant decrease in lung volume as a result of compression by growing eggs within the body cavity. In order to understand the effect of this decrease in lung volume on respiratory physiology of gravid egg-laying lizards I measured changes in: total lung volume, resting and post-exercise expired volume, minute volume, respiratory frequency, and carbon dioxide production during reproduction in Crotaphytus collaris and Gambelia wislizenii. I found that compression of the lungs by eggs resulted in an average 48% (range: 26 to 70%) decrease in total lung volume in C. collaris, and an average 38% (range: …


Molecular Phylogenetic Investigation Of Microbial Diversity And Nitrogen Cycling In Lava Tubes, Jennifer Jane Marshall Hathaway May 2010

Molecular Phylogenetic Investigation Of Microbial Diversity And Nitrogen Cycling In Lava Tubes, Jennifer Jane Marshall Hathaway

Biology ETDs

Worldwide, lava tubes host colorful microbial mats on their walls and ceilings. Little is known about the diversity and ecological roles of the bacteria communities in the subsurface ecosystem of lava tubes. White and yellow microbial mats were collected from four lava tubes from the Azorean island of Terceira and from four lava tubes on the Big Island of Hawaii, to compare and contrast the diversity of bacteria found in lava tubes. The 16S rRNA gene was sequenced in order to determine the diversity within these caves, and to begin to elucidate the environmental controls on microbial diversity in the …


Habitat Variables, Mammal Interactions, And Recovery Approaches Important To A Rare, New Mexican Butterfly, Euphydryas Anicia Cloudcrofti (Lepidoptera: Nymphalidae), Julie Lincoln Mcintyre May 2010

Habitat Variables, Mammal Interactions, And Recovery Approaches Important To A Rare, New Mexican Butterfly, Euphydryas Anicia Cloudcrofti (Lepidoptera: Nymphalidae), Julie Lincoln Mcintyre

Biology ETDs

This research investigated three study topics pertaining to the habitat and ecology of the Sacramento Mountains checkerspot butterfly (Euphydryas anicia cloudcrofti) with the goal of contributing to effective conservation for this rare species. In the first study, abiotic and biotic habitat variables were found to be different between occupied and unoccupied habitat. Connectivity, host plant resource concentration, and plant structural diversity corresponded with butterfly presence at the scales of landscape, meadow, host plant patch, and natal host plant. High habitat quality, low isolation, broad host plant patch area, and high host plant patch density were associated with occupied habitats. Adults …


Apolipoprotein B-Mediated Control Of Staphylococcus Aureus Virulence, Meghan Michal Peterson May 2010

Apolipoprotein B-Mediated Control Of Staphylococcus Aureus Virulence, Meghan Michal Peterson

Biomedical Sciences ETDs

Staphylococcus aureus is a colonizer of the human skin and mucosa that can cause minor to severe disease. Originally afflicting patients at the extremes of age or those with immunocompromising co-morbidities, S. aureus strains have emerged that cause invasive disease in otherwise healthy populations with no health-care associated risk factors. In addition, these community-acquired strains predominately contain antibiotic resistance genes, making them difficult to treat with conventional interventions. Invasive disease in S. aureus is partly regulated by a quorum sensing signaling system that relies on the secretion and signaling function of a bacterial peptide pheromone (AIP). S. aureus strains that …


Development Of Presynaptic Calcium Dynamics And Short-Term Plasticity In The Sc-Ca1 Synapse, Chessa Scullin May 2010

Development Of Presynaptic Calcium Dynamics And Short-Term Plasticity In The Sc-Ca1 Synapse, Chessa Scullin

Biomedical Sciences ETDs

Following a presynaptic action potential, there is a rapid rise of [Ca2+]i in the immediate vicinity of Ca2+ channels that triggers membrane fusion and release of transmitter from vesicles within this microdomain. This presynaptic Ca2+ signal ([Ca2+]pre) then disperses to produce a residual Ca2+ ([Ca2+]res) that decays over the course of tens to hundreds of milliseconds. The [Ca2+]res has important implications in synaptic plasticity and is the basis for working memory storage. Ultimately [Ca2+]res is removed from the cytoplasm either into intracellular organelles or across the plasma membrane into the extracellular environment. Calcium influx pathways, cytoplasmic Ca2+ buffering proteins, and …


Cellular Localization And Expression Of Ski Family Proteins In Rhabdomyosarcoma, Brian Lee Reinert May 2010

Cellular Localization And Expression Of Ski Family Proteins In Rhabdomyosarcoma, Brian Lee Reinert

Biomedical Sciences ETDs

Ski and SnoN are two highly related transcription factors that are transcribed from two separate genes named SKI and SKIL, respectively. They are both co-repressors of the Smad-mediated transforming growth factor beta (TGFβ) signaling pathway. Originally they were classified as oncogenes as they have the ability to transform quail fibroblasts. However, they have also been found to have anti-proliferative properties so they are also considered tumor suppressors. They are involved in normal growth and development and thought to be essential as there is evidence that a homozygous mouse knockout of either SKI or SKIL is embryonic lethal. Both Ski and …


Relative Contributions Of Zinc And Calcium To Acute Injury To Hippocampal Ca1 Neurons, Robert M. Dietz May 2010

Relative Contributions Of Zinc And Calcium To Acute Injury To Hippocampal Ca1 Neurons, Robert M. Dietz

Biomedical Sciences ETDs

Spreading depression (SD) is a wave of severe depolarization that spreads across brain tissue. For several decades, it has been suggested that (SD) may play a role in the expansion of brain injury following ischemic insults, and may also be involved in non-injurious pathologies such as migraine aura. The major goals of this study were to examine cellular mechanisms that contribute to the initiation of different forms of SD, and in particular the potential roles of the cations Ca2+ and Zn2+. Work in this thesis examined SD in hippocampal slices acutely prepared from adult mice. Initial studies used the Na+/K+ …


The Generation And Immunogenicity Of Pp7 Virus-Like Particles Displaying Target Antigens, Alex Medford May 2010

The Generation And Immunogenicity Of Pp7 Virus-Like Particles Displaying Target Antigens, Alex Medford

Biomedical Sciences ETDs

The immunogenicity of an antigen can be increased by displaying it in a highly dense, multivalent context, such as on the surface of a virus or virus-like particle (VLP). However, for many viruses, the ability to display diverse antigens on viral surfaces through the construction of recombinant virus particles is limited because peptide insertions are not compatible with virus or VLP assembly. In this thesis, I examined the ability of VLPs of bacteriophage PP7 to have target peptides inserted into a single-chain dimer of its coat protein and form VLP that display the epitope of interest on the particle surface …


Genetic Contributions To Brain Fiber Architecture And Neuroanatomical Alterations In Alcohol Dependent Individuals: A Correlation Study, Vibhati V. Kulkarny May 2010

Genetic Contributions To Brain Fiber Architecture And Neuroanatomical Alterations In Alcohol Dependent Individuals: A Correlation Study, Vibhati V. Kulkarny

Biomedical Sciences ETDs

Alcohol dependence (AD) is a complex addictive disorder, affecting 5.4% of the general population during a lifetime (Kessler, 2005) and has a complex heterogenous phenotype, with behavioral, morphological, and genetic components. Alcohol use can cause gray matter and white matter tissue damage. The extent of alcoholisms effect on brain matter structure in young adults is less known. Assessement of low and high alcohol dependent individuals was derived from DSM-IV. FSL based Magnetic Resonance Imaging (MRI) and quantitative fiber tracking derived from diffusion tensor imaging (DTI) assessed morphological alterations of 6 gray matter structures involved in addiction and 10 white matter …


Efficient Algorithms For Phylogenetic Post-Analysis, Nicholas Pattengale May 2010

Efficient Algorithms For Phylogenetic Post-Analysis, Nicholas Pattengale

Computer Science ETDs

A variety of tasks are typically performed after a phylogenetic reconstruction proper -- tasks which fall under the category phylogenetic post-analysis. In this dissertation, we present novel approaches and efficient algorithms for three post-analysis tasks: taking distances between (typically, all pairs in a set of) trees, bootstrapping, and building consensus trees. For instance, it is often the case that reconstruction finds multiple plausible trees. One basic way of addressing this situation is to take distances between pairs of trees, in order to gain an understanding of the extent to which the trees disagree. The most frequently employed manner for computing …


Identification And Characterization Of Steroid Receptor Ligands, Megan Kathleen Dennis May 2010

Identification And Characterization Of Steroid Receptor Ligands, Megan Kathleen Dennis

Biomedical Sciences ETDs

This work focuses on steroid receptors, including the androgen receptor (AR), the estrogen receptors (ERs) ERα and ERβ, known as the classical ERs, and GPR30, a recently described G protein-coupled estrogen receptor. Each of these receptors plays a role in many normal tissues and disease pathologies and signaling through steroid receptors is required for growth of many cancers. Additionally, many tissues express more than one estrogen receptor, making delineation of the functions of individual receptors difficult. We have previously identified a GPR30-selective agonist, G-1, and this small molecule has been shown to mediate GPR30 function in a range of in …


Engineering Rna Phage Ms2 Virus-Like Particles For Peptide Display, Sheldon Keith Jordan May 2010

Engineering Rna Phage Ms2 Virus-Like Particles For Peptide Display, Sheldon Keith Jordan

Biomedical Sciences ETDs

Phage display is a powerful and versatile technology that enables the selection of novel binding functions from large populations of randomly generated peptide sequences. Random sequences are genetically fused to a viral structural protein to produce complex peptide libraries. From a sufficiently complex library, phage bearing peptides with practically any desired binding activity can be physically isolated by affinity selection, and, since each particle carries in its genome the genetic information for its own replication, the selectants can be amplified by infection of bacteria. For certain applications however, existing phage display platforms have limitations. One such area is in the …