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Sex-Specific Investment In Incubation And The Reproductive Biology Of Two Tropical Antbird Species, Brian A. Schwartz

Graduate Student Theses, Dissertations, & Professional Papers

Paternal care has been neglected in behavioral studies because it is rare among most animals. Birds express wide variation in male care across a broad life-history gradient, but such variation among species remains poorly explored. At the same time, contributions of male assistance with incubation have been largely overlooked with the assumption that incubation is a time of low parental energy expenditure. We compared male versus female biparental incubation effort between two tropical antbird species in the northern Andes of Venezuela. We found that males and females apportion reproductive effort differently between these two species, but that male contributions of …

The Traditional Wilderness Conception, Postmodern Cultural Constructionism And The Importance Of Physical Environments, Matthew Adam Gray

Graduate Student Theses, Dissertations, & Professional Papers

Recently, a heated debate has emerged between advocates of the traditional wilderness concept and those who believe that this concept is merely a cultural construction. The traditional wilderness conception viewed wilderness as an objective place separate from humans that is defined by being primarily shaped by natural forces, possessing natural origins and being free of human inhabitants and structures. This view culminated in the definition of wilderness featured in the 1964 Wilderness Act. A postmodern critique of the traditional wilderness conception began in the 1980s. In this view, the traditional wilderness conception is thought to be a product of Euro- …

The Vesicular Glutamate Transporter (Vglut): Heterologous Expression, Proteoliposome, Computational And Mass Spectral Studies, Chih-Kai Chao

Graduate Student Theses, Dissertations, & Professional Papers

Vesicular glutamate transporters (VGLUTs) are integral membrane proteins that uptake glutamate into synaptic vesicles and are involved in glutamatergic neurotransmission. Since VGLUTs were identified and cloned, efforts have been made to characterize their functional roles. However, due to experimental limitations, the structural features of VGLUT protein remain unclear. In an attempt to better understand VGLUTs, computational and biochemical approaches were employed to characterize them. Plasmid DNA encoding rat VGLUT1 was constructed, amplified and expressed in Pichia pastoris to produce VGLUT1 protein. Immobilized metal affinity chromatography (IMAC) was employed to purify the protein for structural analysis by mass spectrometry and to …

Novel Roles Of The Endocannabinoid System In Modulating Synaptic Plasticity, Alicia Ninet Angell

Graduate Student Theses, Dissertations, & Professional Papers

Learning and memory formation are invaluable processes in human life; however, the cellular mechanisms that control these phenomena are largely unknown. Synaptic plasticity, which is the ability of the synapse between two neurons to change in strength based on activity, is believed to be a key process in the formation of memories and learning. Endocannabinoids (eCB) have recently emerged as important modulators of synaptic plasticity but their precise roles and mechanisms are not well understood and many contradictions exist in the current literature. We have investigated the roles of eCBs and their primary receptor, the CB1 receptor, in the central …

Oxidative Stress And The Guanosine Nucleotide Triphosphate Pool: Implications For A Biomarker And Mechanism Of Impaired Cell Function, Celeste Maree Bolin

Graduate Student Theses, Dissertations, & Professional Papers

Oxidation of the guanosine (G) moiety, yielding the oxidized lesion 8-hydroxy-2'-deoxyguanosine (oxo82dG), in DNA has become a hallmark biomarker in assessing cellular outcomes induced by oxidative stress. It is well established that the guanosine nucleotide triphosphate pool is also susceptible to oxidative stress and suggested to be more available for oxidation than DNA due to the lack of protective histones and robust repair mechanisms for reducing the levels of all the products of oxidation. The oxidation of guanosine in the nucleotide triphosphate pool, resulting in oxidized guanosine 5'-triphoshate (oxo8GTP), has been overlooked due to the lack of a reliable method. …

Probing Structural Differences Of Recombinant Prion Isoforms Using Fluorescence Spectroscopy, Jessica Louise Gilbert

Graduate Student Theses, Dissertations, & Professional Papers

Conversion of prion protein (PrP) from its normal, cellular isoform, PrPC, to an infectious, misfolded, fibrillar isoform, PrPSc, is responsible for various neurodegenerative diseases in a variety of mammalian hosts. Although the structure of PrPC is well studied, the structure of PrPSc is not known. Obtaining structural information on the misfolded isoform of prion may lead to preventative therapies and treatments of prion diseases. In this study, six single-tryptophan mutants of recombinant PrP were expressed, purified, and refolded into PrPC or two misfolded isoforms of prion, PrPb and PrPF. Solvent accessibilities of the six tryptophan residues were probed among the …

Fifty Years Of Memory Of College Grades: Accuracy And Distortions, Harry P. Bahrick, Lynda K. Hall, Laura A. Da Costa

All Faculty and Staff Scholarship

One to 54 years after graduating, 276 alumni correctly recalled 3,025 of 3,967 college grades. Omission errors increased with the retention interval, and better students made fewer errors. Accuracy of recall increased with confidence in recall. Eighty-one percent of commission errors inflated the actual grade. Distortions occur soon after graduation, remain constant during the retention interval, and are greater for better students and for courses students enjoyed most. Confidence in recall is unrelated to distortion. Courses that were not freely recalled, but had to be cued, were recalled less accurately and with less distortion. The data support a supplementary theory …

Water Marketing As An Adaptive Response To The Threat Of Climate Change, Jonathan H. Adler

Faculty Publications

Whereas there has been substantial research on the potential effect of climate change upon water resources, there has been relatively little consideration of the role of institutional arrangements in mitigating (or exacerbating) the potential effects of warming-induced changes in water supplies. Climate change increases the urgency with which water managers and policymakers must address water supply concerns, moving toward water supply institutions and policies that are sufficiently flexible, adaptive, and robust to deal with the uncertain water future. As the LPCC has concluded, "changes in water management practices will have a very significant impact on how climate change affects the …

Age At Death Estimation From The Sacral Side Of The Sacroiliac Joint, Misty Marie Keahi Rego

Graduate Student Theses, Dissertations, & Professional Papers

This thesis presents a new method of age estimation in adult human skeletal remains based on age related degenerative changes of the sacral side of the sacro iliac joint. It is inspired by the existing method of aging based on age related degenerative changes of the iliac side of the sacro iliac joint developed by Lovejoy et al. (1985). This new method uses a ten-year-wide incremental scale of age estimation. The development and testing of this method was done using the Documented Collection from the University of New Mexico's Maxwell Museum of Anthropology. Results suggest that utilizing sacral deterioration to …

An Experimental Demographic Approach To Exotic Plant Success: Cynoglossum Officinale In Its Native And Introduced Ranges, Jennifer Lynn Williams

Graduate Student Theses, Dissertations, & Professional Papers

Invasive species often face novel abiotic and biotic environments with different selective regimes where they are introduced. How these changed conditions influence individual life-history traits, and what particular factors spur increases in population abundance in the introduced versus native range, are not well understood. I conducted parallel experiments in both the native and introduced ranges of a widespread plant invader in North America, houndstongue (Cynoglossum officinale). I combined these experimental results with demographic monitoring in each range, and population modeling, to explore how introduction has affected houndstongue demography and life-history evolution, and to determine the role of specialist …

Anthropometric Variation In California: A Study Of Native American Populations, Catherine R. Mahoney

Graduate Student Theses, Dissertations, & Professional Papers

Physical anthropologists study the patterns of human morphology to observe the influence of genetics and environment on cranial form. The following study compares cephalic and nasal index means from four Native American populations using modern statistical methods, including one-way ANOVA tests and Games-Howell comparison tests. The individuals used were of only Native American ancestry, over the age of seventeen when the data was collected, and were divided into male and female samples. The climatic conditions of each of the regions are compared to examine the relationship between the mean cranial and nasal indices and the environments in which the populations …

Causes And Consequences Of Displacement Decision-Making In Banhine National Park, Mozambique, Chad Edward Dear

Graduate Student Theses, Dissertations, & Professional Papers

Decision-making is looming regarding the displacement of people resident in and reliant on resources in strict protected areas around the world. This research investigated the causes and consequences of displacement decision-making in Banhine National Park (BNP), Mozambique. I investigated causes using political-economic, actor-centered, and post-structural perspectives on power. I investigated consequences using the Impoverishment Risk and Reconstruction (IRR) framework. Methods included interviews, focus groups, and observations involving BNP-area residents; park staff; district, provincial, and national-level government employees from various sectors; NGO and World Bank staff; and private consultants. I also analyzed numerous government and donor policies, plans, reports, and legal …

Causes And Consequences Of The Postfire Increase In Deer Mouse (Peromyscus Maniculatus) Abundance, Rafal Pawel Zwolak

Graduate Student Theses, Dissertations, & Professional Papers

Wildfire triggers an increase in deer mouse (Peromyscus maniculatus) abundance. Here, I describe this phenomenon, investigate its causes, and explore the consequences of the postfire increase in mice for conifer recruitment in burned forest. I documented a shift in small mammal communities away from more specialized species such as red-backed voles (Myodes gapperi) and shrews (Sorex spp.) and towards greater abundance of generalist deer mice after a wildfire in montane forest. I conducted a meta-analysis of published studies on the abundance of small mammals in disturbed versus undisturbed forests and established that the pattern of increased deer mouse abundance holds …

Changes In Osteoarthritis Of The Elbow And Shoulder Joints In Women When Trasitioning From Hunting And Gathering To An Agricultural Subsistence, Kirsten Anne Green

Graduate Student Theses, Dissertations, & Professional Papers

Changes in bone morphology have always been a concern of physical anthropologists who are trying to explain a culture's everyday activity. These types of changes, including arthritic and musculoskeletal, are based on subjective observation of the researcher and therefore subject to observer error. I used three samples; the Indian Knoll sample, the Nutwood and Rosedale Mound sample, and a control sample from the Terry collection I was able to employ a scoring method based on Hawkey (1988). This current research uses the scoring method for arthritic changes in women to test for changes in patterns of distribution and/or severity when …

Chronic Low-Level Pb Exposure During Development Alters Proteins Involved In Energy Metabolism In Auditory Neurons Of The Brainstem, John Prins

Graduate Student Theses, Dissertations, & Professional Papers

Low level lead (Pb) exposure is a risk factor for neurological dysfunction including ADHD. How Pb produces these behavioral deficits is unknown, but low-level exposure during development is associated with auditory temporal processing deficits, even though hearing remains normal. Pb disrupts cellular energy metabolism and efficient energy production is crucial for auditory neurons to maintain their high rates of synaptic activity. The voltage dependent ion channel (VDAC) is an ion channel involved in the regulation of mitochondrial physiology and is a critical component in controlling mitochondrial energy production. No studies to date have investigated the effect of Pb on VDAC, …

A Landscape Approach To Grassland Bird Conservation In The Prairie Pothole Region Of The Northern Great Plains, Frank Royce Quamen

Graduate Student Theses, Dissertations, & Professional Papers

Prairie is one of the most imperiled ecosystems, and grassland birds have experienced steeper and more consistent declines than any other group of birds in North America. Habitat-based planning tools are a cornerstone of conservation in forested ecosystems, but remain a novel approach in grasslands. In Chapter 2, I develop spatially-explicit habitat models as decision support tools for conservation. I survey birds, measure local vegetation and quantify landscape features at 952 sites in western Minnesota and northwest Iowa. Findings indicate that cropland provides little habitat for grassland songbirds and that hayland does not compensate for loss of grasslands. Multiscale models …

Custer's Last Drag: An Examination Of Tobacco Use Among The Seventh Cavalry During The Nineteenth Century, Shannon Marjorie Vihlene

Graduate Student Theses, Dissertations, & Professional Papers

Tobacco has played an integral role in global history, and there are numerous historical records related to tobacco use over the past five hundred years. The odontological evidence recovered from the Custer National Battlefield infers a high frequency of tobacco use within the Seventh Calvary, yet nineteenth century historical records fail to mention such intensive use in the Seventh Calvary. This paper will briefly discuss late nineteenth century tobacco culture and apply that to a bioarchaeological research project associated with remains from the Custer National Battlefield to addresses this contradiction between historical and physical records.

Design, Synthesis And Biological Evaluation Of A Family Of Excitatory Amino Acid Transporter 3 (Eaat3) Preferring Inhibitors, Terri Lynn Mavencamp

Graduate Student Theses, Dissertations, & Professional Papers

This work describes the synthesis and initial characterization of the biological activity of a family of EAAT3 preferring inhibitors, L-β-benzyl aspartate (L-β-BA) and L-β-BA derivatives. L-β-BA and derivatives were initially synthesized in an approximate 2:1 ratio of diasteromers (threo:erythro), using base promoted enolate addition. Kinetic analysis of 3H-D-aspartate uptake into C17.2 cells expressing the hEAATs demonstrated that L-threo-β-BA is the more potent diastereomer (Ki values of 9 µM for EAAT1, 10.0 µM for EAAT2 and 0.8 µM for EAAT3), acts competitively, and exhibits a 10-fold preference for EAAT3 compared to EAAT1 and EAAT2. Electrophysiological recordings of EAAT-mediated currents in Xenopus …

Exploring The Benefits Of An Outdoor Adventure Program For Improving Self-Esteem And Self-Efficacy And Reducing Problem Behaviors In Adolescent Girls, Kristen O'Shea

Graduate Student Theses, Dissertations, & Professional Papers

The study assessed change in self-efficacy, self-esteem, and problem behaviors from pre-treatment to post-treatment and at 6-month follow-up for adolescent girls enrolled in an outdoor adventure program. Family security and previous program experience were also considered. Participants included 62 girls (ages 10 - 18) from diverse ethnic and SES backgrounds (the majority were Euro American from middle class backgrounds). As expected, problem behaviors were negatively correlated with self-esteem throughout the trip; they were negatively correlated with self-efficacy at 6-month follow-up. Girls from "higher security" families reported significantly higher levels of self-esteem (p < .05) and fewer problem behaviors (p < .01) than girls from "lower security" families. A principal components analysis (PCA) was run to review test properties of one of the study measures, the modified General Self-Efficacy Scales. Limitations of the study, including low power and few statistically significant results, are discussed.

Mallard Nesting Ecology In The Great Lakes, Jonas Ian Davis

Graduate Student Theses, Dissertations, & Professional Papers

Understanding how habitat features influence vital rates that drive population growth is fundamental for delivery of effective conservation programs. Past decisions in management of Great Lakes mallard (Anas platyrynchos) populations were based largely on paradigms established in the mid-continent because regional data were lacking. Recent sensitivity analyses from the Great Lakes Mallard Study show that population growth (i.e., λ) is most sensitive to changes in nest success (16%) and duckling survival (32%). In spring of 2001 to 2003, as part of the Great Lakes Mallard Study, 536 mallards were radio-marked at nine sites in four states (Michigan, Ohio, Wisconsin, and …

Disruption Of 8-Hydroxy-2'-Deoxyguanosine Dna Glycosylase (Ogg1) Antioxidant Response Capacity By Sodium Arsenite, David Paul Cox

Graduate Student Theses, Dissertations, & Professional Papers

8-hydroxy-2'-deoxyguanosine DNA glycosylase is the first step and rate-limiting enzyme involved in the removal of 8-hydroxy-2'-deoxyguanosine via the base excision repair pathway. Transcriptional regulation of human Ogg1 is sensitive to redox changes via modulation of intracellular glutathione. In response to changes in glutathione, changes in hOgg1 transcription occur similar to genes regulated by the transcription factor Nrf2. It was determined that positions - 47 to - 44 in the hOgg1 promoter are necessary for basal transcription of Ogg1 determined by site-directed deletion. This region is capable of interacting with nuclear protein determined by binding assays. Furthermore, transcription factor Nrf2 is …

Peter Severinus: From Humours To Chemistry In The Sixteenth Century, Michael T. Walton, Robert M. Fineman

Quidditas

The re-discovery of the works of Mendel and others has added greatly to our understanding of genetics. Such is now the case of Peter Severinus, with the recent recovery (or re-discovery) of his seminal work, Idea Medicinae Philosophicae (1571). Severinus concurred with Paracelsus’s (1493-1541) concept of seeds (little chemical factories) that worked on matter to form living things; but he was also aware of transplantation (grafting and cross-pollination) that changed phenotypes and genotypes in plants. Severinus applied this understanding to hereditary diseases in humans and extended Paracelsian theory. He believed that certain diseases in one’s offspring were caused by a …

Instead Of Enda, A Course Correction For Title Vii, Jennifer S. Hendricks

Publications

In September 2008, the D.C. federal court issued a landmark decision holding that discrimination against a transgender person was sex discrimination under Title VII. This decision throws into sharp relief the ongoing debates among supporters of the Employment Non-Discrimination Act about whether the compromise on including protection for gender identity claims. Consideration of ENDA in some form will likely be early on the agenda of the next Congress, especially under a Democratic administration likely to support the bill. This essay proposes an alternative to ENDA that would embrace the theoretical connections between sex, gender, and sexual orientation, with important practical …

An Introduction To Systems Biology For Mathematical Programmers, Evind Almaas, Allen G. Holder, Kevin D. Livingstone

Mathematics Faculty Research

Many recent advances in biology, medicine and health care are due to computational efforts that rely on new mathematical results. These mathematical tools lie in discrete mathematics, statistics & probability, and optimization, and when combined with savvy computational tools and an understanding of cellular biology they are capable of remarkable results. One of the most significant areas of growth is in the field of systems biology, where we are using detailed biological information to construct models that describe larger entities. This chapter is designed to be an introduction to systems biology for individuals in Operations Research (OR) and mathematical programming …

Wildland Firefighter Health Risks And Respiratory Protection, Claire Austin

Rapports de recherche scientifique

Cliquez ici pour la version française de ce rapport

Les pompiers forestiers sont exposés à un mélange complexe de produits de combustion, inclusion faite du monoxyde de carbone, de vapeurs et de gaz irritants, d’agents cancérogènes, de particules inhalables et de nanoparticules. Ils fournissent un niveau d’effort considérable lorsqu’ils combattent des incendies, et leurs quarts de travail peuvent s’étendre jusqu’à 16 heures ou plus.

Des études sur les pompiers forestiers ont été réalisées aux États-Unis et en Australie, mais jamais au Québec. Ces pompiers font souvent état de troubles respiratoires et neurologiques. Une déperdition de la fonction respiratoire a aussi …

The Meaning Of Work, Mental Health And Organizational Commitment, Estelle Morin

Rapports de recherche scientifique

Cliquez ici pour la version française de ce rapport

Le projet présenté ici vise à déterminer les facteurs reliés au sens du travail qui ont un impact sur la santé mentale au travail et l’engagement organisationnel. Les résultats attendus sont d'une part, vérifier les relations entre les facteurs du sens au travail, la santé mentale au travail et l’engagement organisationnel et d'autre part, recommander des actions visant à corriger ou améliorer les facteurs qui affectent le sens du travail.

Les hypothèses suivantes ont été testées :

1. Les caractéristiques du travail suivantes sont positivement corrélées entre elles : l’utilité du travail, …

Développement De Marqueurs Et Validation D’Outils De Diagnostic Pour Le Dépistage De L’Hypersensibilité Induite Par Le Béryllium, Michel Fournier, Jacques Bernier, Pauline Brousseau, Daniel Cyr, Guy Viel, Sébastien Sauvé

Rapports de recherche scientifique

Le béryllium est connu pour sa grande toxicité. Il provoque, suite à l’inhalation de poussières ou de vapeurs des pneumopathies sévères (bérylliose) et des atteintes chroniques dite maladie chronique du béryllium (MCB). En moyenne, 1à 20% des travailleurs exposés deviennent sensibilisés, desquels 1 à 10 % développent la MCB. Il existe un test de laboratoire couramment utilisé pour déceler la sensibilisation d’un travailleur au béryllium; il s’agit du test de prolifération des lymphocytes en présence de béryllium le "Beryllium Lymphocyte Proliferation Test" (BeLPT). Bien que ce test permette de détecter la sensibilisation, il offre peu de valeur prédictive quant aux …

Disability And “Late Style” In Music, Joseph N. Straus

Publications and Research

“Late style” is a longstanding aesthetic category in all the arts. Late-style music is presumed to have certain internal qualities (such as fragmentation, intimacy, nostalgia, or concision) and to be associated with certain external factors (such as the age of the composer, his or her proximity to and foreknowledge of death, lateness within a historical period, or a sense of authorial belatedness with respect to significant predecessors). Upon closer inspection, it appears that many of these external factors are unreliably correlated with a musical style that might be described as late. Late style is often better correlated with the bodily …

Fundamentals Of Biology 1 Lab, Todd Schraw

Syllabus Repository

No abstract provided.

Chemical Analysis Of Polymer Blends Via Synchrotron X-Ray Tomography, Heath Alan Barnett

LSU Doctoral Dissertations

Material properties of industrial polymer blends are of great importance. X-ray tomography has been used to obtain spatial chemical information about various polymer blends. The spatial images are acquired with synchrotron X-ray tomography because of its rapidity, good spatial resolution, large field-of-view, and elemental sensitivity. The spatial absorption data acquired from X-ray tomography experiments is converted to spatial chemical information via a linear least squares fit of multi-spectral X-ray absorption data. A fiberglass-reinforced polymer blend with a new-generation flame retardant is studied with multi-energy synchrotron X-ray tomography to assess the blend homogeneity. Relative to other composite materials, this sample is …