Digital Commons Network^™

Ecological Speciation Of King Rails (Rallus Elegans) And Clapper Rails (Rallus Longirostris), James Michael Maley

LSU Doctoral Dissertations

Ecological speciation is a process involving adaptation to different environments leading to reproductive isolation between populations. Hybridization between Clapper and King rails (Rallus longirostris and R. elegans) is frequent but restricted to narrow bands of brackish marsh along the Gulf of Mexico and Atlantic coastlines of North America. In the second chapter I used mitochondrial and nuclear sequences to infer phylogenetic relationships in this species complex. The complex falls out into three distinct groups: South America; western North America; and eastern North America and the Caribbean. My results indicate that R. elegans as currently recognized is paraphyletic, with birds of …

Performance, Preference, Promotion: Political Mobility Of Chinese Regional Leaders, Liang Qiao

LSU Doctoral Dissertations

As a study exclusively on the political elites, the dissertation studies the Chinese regional leaders and their political career mobility controlled by the central government from 1949 to 2010. The Chinese Communist Party controls its regional leaders by controlling their career movement (political mobility). This study explains why some regional leaders were promoted while some others were demoted or dismissed while most of them shared similar personal background and career experience. By providing empirical evidence with quantitative analysis, this study shows that in post-Deng Chinese politics (1997-2010) there are certain patterns and manipulated by the CCP center in demoting and …

Generation And Characterization Of High Co₂ Requiring Mutants In Chlamydomonas Reinhardtii, Yunbing Ma

LSU Doctoral Dissertations

Chlamydomonas reinhardtii (referred to as C. reinhardtii hereinafter) possesses a CO2 concentrating mechanism (CCM) that allows the alga to grow at low CO2 concentrations (100 ppm CO2 in air). This dissertation represents the results from the characterization of three CCM mutants, as well as generation of eleven more potential mutants deficient in the CCM. One common feature seen in photosynthetic organisms possessing a CCM is the tight packaging of Rubisco within the cell. In many eukaryotic algae, Rubisco is localized to the pyrenoid, an electron dense structure within the chloroplast. The first mutant characterized has a highly disorganized pyrenoid. The …

Climate Change Displacement And Global Governance: A Case Study Of Three Intergovernmental Organizations And The Conflict Between The Member States And Bureaucracy, Andrea C. S. Berringer

LSU Doctoral Dissertations

Climate change is a topic most often broached by environmental scientists and activists and its effects are discussed in terms of animal populations and atmospheric events. However, its direct effect on human life is yet to garner such attention. A changing climate will affect how people are able to use their environment, if at all. Sea level rise and desertification will force a shift in human habitation. How the world seeks to deal with this shift is yet to be seen. The global governance of climate change-induced displacement is currently at the stage of ad hoc development. Legal and conceptual …

Overexpression Of A Plasma Membrane Protein Gene, Sapmp3, From Spartina Alterniflora L. Enhances Salinity Tolerance In Rice (Oryza Sativa L.), Hanamareddy Biradar

LSU Doctoral Dissertations

Salinity continues to be a major abiotic stress limiting crop productivity. As rice is staple food for nearly half of the world population, improvement in its salt tolerance will have a major impact on global food security. Compared to rice and other field crops, halophytes have evolved special physiological mechanisms to withstand high salinity. The overall goal of this study was to characterize plasma membrane protein 3 genes, SaPMP3-2 and SaPMP3-1, from a halophyte, Spartina alterniflora L., and evaluate their potential in single gene as well as pyramided transgenic plants in combination with the vacuolar ATPase subunit c1 (SaVHAc1) gene …

Ayahuasca Characterization, Metabolism In Humans, And Relevance To Endogenous N,N-Dimethyltryptamines, Ethan Hamilton Mcilhenny

LSU Doctoral Dissertations

Ayahuasca denotes an Amazonian psychotropic plant tea obtained from Banisteriopsis caapi, which contains beta-carboline (b-carboline) alkaloids, chiefly harmine, harmaline and tetrahydroharmine. The tea usually incorporates the leaves of Psychotria viridis, which are rich in N,N-dimethyltryptamine (DMT), a psychoactive 5-HT2A agonist. The beta-carbolines reversibly inhibit monoamine-oxidase (MAO), effectively preventing oxidative deamination of the orally inactive DMT and allowing its absorption and access to the central nervous system. Despite increased use of the tea worldwide, easy to perform and validated methods for its characterization do not exist and the metabolism and excretion of DMT and the b-carbolines has not been studied systematically …

Synthesis, Cellular Studies, And Computational Analysis Of Porphyrin And Bodipy Conjugates With Affinity For Epidermal Growth Factor Receptor, Alecia Michelle Mccall

LSU Doctoral Dissertations

Chapter 1 is a description of the basic fundamental concepts of porphyrins and BODIPYs, (including synthetic methodologies), a general mechanism of the processes of EGFR, and computational concepts that are elaborated upon in future chapters. Chapter 2 is a discussion solely on the porphyrins that were synthesized to be used as fluorophores for EGFR-targeted conjugates, both peptidic and non-peptidic. The porphyrins were primarily synthesized via the Lindsey method as well as by O-alkylation of tetrahydroxy porphyrins. Synthesis of PEG linkages are discussed as well through three methodologies. Chapter 3 is a presentation of the synthesis, characterization, cellular studies, and computational …

Splitting A Pair: Playing The Gender Card And The Race Card In American Politics, Amy Ladley

LSU Doctoral Dissertations

More than any election before, the 2008 Presidential race revealed a persistent discussion of “race cards” and “gender cards.” In spite of the reported consensus that these alleged cards were everywhere, we know relatively little about those situations where the “card” label was applied, and even less about how this label influenced voters. In fact, among key electoral sources – political elites who use identity as a campaign tool, the journalists who cover and narrate elections, and researchers who make sense of elections-based behavior – there is no consensus regarding what a card is, how or when they are played, …

En(Gendering) Policy: Gender Policies In Former Soviet Republics, Natasha Lachelle Bingham

LSU Doctoral Dissertations

This dissertation examines gender policies in former Soviet republics. Gender policies are depicted as traditional policies (including such policies as child support, spousal support, and inheritance rights), violence against women policies (domestic violence, marital rape, sexual assault, and sexual harassment), and human trafficking policies. It builds upon previous works with a multi-methodological approach (content analysis, logistical regression, and qualitative survey analysis). The focus here is on the factors that influence adoption of formal policies in former Soviet republics from 1993-2008. I explore variance across both countries and policy areas, assessing whether (and why) certain post-Soviet states are more likely to …

El Uso De Las Funciones De Las Citas En La Estructura Retórica De Las Introducciones De Memorias De Máster Escritas En Español Por Estudiantes Nativos Españoles Y No Nativos Filipinos, David Sánchez-Jiménez

Publications and Research

This article analyzes the correlation between the use of functions of citations and the organizational structure of the Introduction section of a corpus of sixteen (16) master´s theses written in Spanish in the field of Applied Linguistics by native and non-native writers. The quantitative and qualitative analysis in this study arises from the model proposed by Carbonell- Olivares et al. (2009) which aims to define the organization of the Introduction section of the doctoral thesis in Spanish and the classification of the functions of citations made by Sánchez Jiménez (2011). The research results show that there is a direct relationship …

Country Of Illusion: Imagined Geographies And Transnational Connections In F. Scott Fitzgerald's America, Charles Mitchell Frye Iii

LSU Doctoral Dissertations

The two decades between World Wars I and II were a remarkably isolationist, xenophobic period in the history of American politics and culture. In the era’s literature, however, some US authors repurposed regional writing as a medium for rethinking conservative nationalism and for imagining their country’s place in the emerging global community. F. Scott Fitzgerald, whose career successes and failures mirrored the parabolic national pattern of Boom and Bust, was one such author. Though his works have seldom been interpreted through a regionalist lens, Fitzgerald lived in and wrote about every major American section, often planting tropes of transregional and …

Tools For School: Student Fluency And Perception Of Cell Phones Used For Learning, Mary Beth Humble-Thaden

Theses and Dissertations

Technology is changing the way society interacts, communicates, collaborates, and learns. Improved cell phone capabilities and an ever increasing amount of cell phone applications allow individuals to connect globally and afford almost instantaneous access to information inside and outside the classroom. The majority of students today possesses and uses cell phones and cell phone technology in most every aspect of their daily lives. Most schools enforce current policies banning cell phone use within classrooms during the school day.

The purpose of this study was to investigate current high school junior and senior academic standing students' mobile cell phone technology use, …

Separation And Use Of Oxygenated Byproducts From Non-Catalytically Cracked Triglycerides And Their Methyl Esters, Benjamin Travis Jones

Theses and Dissertations

The world is dependent on petroleum as its main source of fuels and chemicals. Supply limitations and global warming have generated a great deal of interest in research to reduce this dependence through renewal fuels and chemicals.

Non-catalytic cracking and subsequent distillation of triacylglyceride (TAG) oils and methyl esters derived from these oils (TMEs) produces an organic liquid product (OLP) that is rich in potential fuels and chemicals. A major fraction of the OLP is made up of oxygenated compounds, either short chain fatty acids (SCFAs) if TAG oil is cracked, or short chain methyl esters (SCMEs) if TMEs are …

Multisexual Identities And Mental Health: Mitigating Factors Of Minority Stress, Kimberly Marie Jorgensen

Theses and Dissertations

Much of the current literature about sexual minorities examines the experiences of lesbian- and gay-identified individuals. The current study was designed to facilitate increased understanding of sexuality for people who have multi-gendered attractions and sexual identities (e.g., bisexual, queer). This work extends beyond discrete binary categories and labels for sexual orientation, such as straight, gay, and lesbian. In the current examination of this expanded category, labeled as multisexual, it becomes important to shift not only the conceptualization of sexual orientation but also the nature of minority stress, from examining homophobia and heterosexism, to biphobia and monosexism. Under circumstances when an …

Presidents, Politics, And Policy: How The Apollo And Shuttle Decisions Shaped Nasa, Marc Antony Fusco

Theses and Dissertations

The two most important decisions in the history of NASA after its founding have been John Kennedy's decision to send humans to the moon and Richard Nixon's decision to develop the space shuttle. This study examines the nature of each decision, and illustrates how each decision resulted from a confluence of world events, presidential personalities, and domestic political pressures.

This examination of both primary and secondary historical and policy source materials demonstrates that the individual personalities of each president, especially how each reacted to domestic and international political and economic pressures, played a major role in the formulation of these …

Introducing Astronomy Into High School Physics Curriculum Through The Use Of The University Of North Dakota Observatory, Caitlin Marie Nolby

Theses and Dissertations

Astronomy education is currently lacking in the secondary level classroom. Many programs have been created to remedy this, including research opportunities for students and training workshops for educators. These reach only a small fraction of the population however, while remaining students still lack the opportunity to learn astronomy at the secondary level. This research addresses the creation of a program that will make astronomy education a recurring option for students across North Dakota through implementation of a two-week astronomy course at Grand Forks Central High School (GFCHS) in a class of 19 physics students. During ten class periods from April …

"You Are Safe": Black Maternal Politics Of Resistance And The Question Of Community Consensus In African American Women's Literature, Daniela Marinova Koleva

Theses and Dissertations

The study focuses on a number of African American women's literary texts that employ the figure of the black mother and the motif of infanticide to engage in critical statements about system arrangements, repressive practices, and theory designs with direct effect upon black people's choices for organizing their lives and existence. Such critical statements are inevitably political and their construction is offered in a most provocative and startling way given the choice of maternal infanticide to make the claims.

Angelina Weld Grimke's "The Closing Door" (1919), Georgia Douglas Johnson's Safe (c.1929), Shirley Graham's It's Morning (c. 1938-1940), and Toni Morrison's …

How Faith And Leadership Are Connected: A Study Of Catholic Women Administrators In A Southern Public Institution Of Higher Education, Mary Blanchard Wallace

LSU Doctoral Dissertations

Studies concerning spirituality and higher education, particularly for the college student, are beginning to appear in journals, conference papers, and presentations. However, there is little research conducted with professionals in higher education on the construct of spirituality. Spirituality has so many different definitions in the literature, it is difficult to define, and perhaps even more complex to study academically. Using a research-based conceptual model for religious faith, developed within the study of family sciences, this study examines the lived experience of how and why Catholic women administrators connect their faith and leadership in a setting of public institutions of higher …

Desire And Influence: Male Self-Realization And Film Progression Due To The Influential Women In The Films Of Wes Anderson, Erin Ann Meiers

Theses and Dissertations

My thesis is an analysis arguing that the roles of women in three of Wes Anderson's films, Rushmore (1996), The Royal Tenenbaums (2001), and The Life Aquatic(2004), are vital in influencing the men that surround them to come to a self-realization and in the progression of the film as each character finds closure, despite critic's claims. Critics Jesse Mayshark and Greg Carlson examine Anderson's films to be basically about men stuck in arrested development that as they rival each other they grow and mature, and discount the roles of women as simply a side note. I build upon their analysis …

Role Of Gravin In Endothelial Wound Healing, Bhaskar Roy

Theses and Dissertations

Gravin (AKAP12), a 300 kDa AKAP, is widely distributed in cells and binds to several signaling molecules including PKA-RII subunits, PKCα, PDE4, β2 adrenoreceptor and actin cytoskeleton. Initial characterization of gravin has revealed that this protein is undetectable in endothelia in vivo but expressed at the periphery of cultured endothelial cell (EC). Although the precise role of gravin in human ECs is not yet known, the cortical distribution of gravin in EC suggests that it may be involved in cAMP regulation by targeting PKA and PDE4 to plasma membrane. Several studies indicate that localization of PKA activity by A-kinase anchoring …

Impact Of Coal Derived Impurities On The Performance Of Hydrogen Separation Membranes, Joshua Stanislowski

Theses and Dissertations

In order to facilitate the use of hydrogen in integrated gasification combined-cycle (IGCC) applications or as a transportation fuel, hydrogen-from-coal technologies that are capable of managing carbon will be needed. Many technologies are under development for the separation of hydrogen from coal-derived syngas, and among the most promising are hydrogen separation membranes. Studies indicate a significant IGCC plant efficiency increase can be realized if warm-gas cleanup and hydrogen separation membranes are used in place of conventional technologies. These membranes provide the potential to produce hydrogen while simultaneously separating CO2 at system pressure. Membrane development to date has primarily occurred on …

Knowledge Translation Practices Of Health Services Research Organizations In The United States, Wendy Opsahl

Theses and Dissertations

Health services research organizations have generated a growing body of literature that focuses on better understanding challenges facing health care delivery. However, their findings do not always reach end users (e.g., policymakers, providers, managers, general public) in ways that are helpful, relevant, or cost-effective despite the availability of numerous resources designed to aid researchers in communicating more effectively. The purpose of this study was to understand better how health services research organizations in the United States communicate their research findings to end users; determine the degree to which they are translating research findings in ways consistent with the empirical evidence; …

Neuroglial Mechanisms Involved In The Anti-Inflammatory Effect Of Acetate Supplementation, Mahmoud Lotfy Soliman

Theses and Dissertations

Acetate supplementation increases brain acetyl-CoA and attenuates lipopolysaccharide (LPS)-induced neuroinflammation in vivo. To explain the anti-inflammatory effect of acetate treatment, we proposed that acetate treatment disrupts inflammatory signaling in microglia and astrocytes, and induces histone hyperacetylation known to be correlated with anti-inflammatory properties. To test this hypothesis, we measured the effects that LPS and acetate treatment had on histone acetylation, mitogen-activated protein kinase (MAPK), nuclear factor-kappa B (NF-κB), and eicosanoid signaling. A single oral dose of acetate treatment (6 g/kg) in normal animals induced a time- and site-specific pattern of histone hyperacetylation, associated with reduction of histone deacetylase (HDAC) activity …

A High Energy X-Ray Diffraction Investigation Of Sodium Phosphate Glasses Doped With Less Than 5 Mol% Praseodymium Oxides, Kailing Zhang

Theses and Dissertations

Rare earth phosphate glasses (REPGs) are excellent materials for high energy (103 - 106 J) / high peak power ( 1012 - 1015 W) lasers. Previous work of the rare earth doped sodium phosphate glasses with compositions (R₂O₃)_x(Na₂O)_y(P₂O₅)_1-x-y where R= Nd, Eu and Dy, 0.04 < x < 0.13 showed that the intensity of the emission spectra increases with decreasing R₂O₃ content. In this study, praseodymium doped sodium phosphate glasses with even lower praseodymium oxide concentrations, (Pr₂O₃)_x(Na₂O)_yP₂O₅)_1-x-y , where 0.005 < x < 0.05 were processed and characterized focusing on the region where the lasing efficiency is possibly going to peak. Emission spectra for the glass samples were measured to study how the florescence efficiency change with Pr3+ concentration. High Energy X-ray diffraction technique was used to study the atomic-scale structure of the rare-earth doped sodium phosphate glass samples. Structural features such as inter-atomic distances, coordination numbers and their dependence on the concentration of the rare earth oxides were gained from analyzing pair distribution functions extracted from diffraction data.

Effect Of Surfactants And Brine Salinity And Composition On Spreading, Wettability And Flow Behavior In Gas-Condensate Reservoirs, Yu Zheng

LSU Doctoral Dissertations

The well-known condensate blockage problem causes severe impairment of gas productivity as the flowing bottom-hole pressure falls below the dew point in gas-condensate reservoirs. Hence, this study attempts to investigate the concept of modifying the spreading coefficient and wettability using low-cost surfactants in the near wellbore region, to prevent the gas flow problems associated with condensate buildup. This study also examines the effect of brine salinity and composition on wettability, spreading and adhesion in condensate buildup regions, to evaluate the ability of brine salinity/composition for enhanced gas productivity in gas-condensate reservoirs. In this study, experiments were performed at both ambient …

Single-Molecule Detection Of Molecular Beacons Generated From Ldr On Thermoplastic Microfluidic Device For Bioanalysis, Zhiyong Peng

LSU Doctoral Dissertations

Current clinical techniques for nucleic acid detection and analysis often involve PCR, lacking adequate specificity or sensitivity to meet the stringent requirements in certain applications. This research aims to develop an innovative molecular assay and the associated hardware to rapidly signal the presence of certain targets using reporter sequence found in their genome without requiring PCR. This assay coupled the sensitivity of single-pair fluorescence resonance energy transfer (spFRET) with the specificity of ligase detection reaction (LDR) to provide near real-time readout of target biomarkers. Heightened concerns on potential bioterrorism threats, such as rapid dissemination of pathogenic bacteria or viruses into …

A Discourse On Geospatial Technology Applications In Predictive Analytics And Evidence-Based Decision Support For Disaster Research And Management, Steven Matthew Ward

LSU Doctoral Dissertations

Continued population growth and development in vulnerable locations across the world are creating a new geography of hazards and disasters. Increasing storm frequencies coupled with unrelenting efforts to control flooding through structural means will undoubtedly intensify the intersection between flood hazards and humans. Accordingly, the baseline capacity of places to prepare for and rebound from disaster events adequately is negatively impacted. Hurricane Katrina brought this reality to the forefront of disaster science and management in 2005. Concurrent with the increased awareness of evolving hazardscapes has been the identification of deficiencies in how components of disasters are studied and managed. The …

No Halos For Sex Offenders: An Examination Of The Effects Of Appearance And Gender On The Perception Of Sex Offenders, Adam Charles Austin

Theses and Dissertations

For the last couple of decades, sex offenders have been stereotyped into being strangers to the victim and "dirty old men." However, recent research has shown that the public is no longer endorsing those stereotypes (Fuselier, Durham, & Wurtele, 2002; Levenson, Brannon, Fortney, & Baker, 2007). Instead the public is realizing that there is no stereotypical sex offender and most victims of sex offenses know their assailant to some degree. The purpose of the current study is to look at the judgments made about a teacher being accused of criminal sexual contact with a student, where gender and attractiveness of …

Software Architectural Support For Tangible User Interfaces In Distributed, Heterogeneous Computing Environments, Cornelius Toole

LSU Doctoral Dissertations

This research focuses on tools that support the development of tangible interaction-based applications for distributed computing environments. Applications built with these tools are capable of utilizing heterogeneous resources for tangible interaction and can be reconfigured for different contexts with minimal code changes. Current trends in computing, especially in areas such as computational science, scientific visualization and computer supported collaborative work, foreshadow increasing complexity, distribution and remoteness of computation and data. These trends imply that tangible interface developers must address concerns of both tangible interaction design and networked distributed computing. In this dissertation, we present a software architecture that supports separation …

Developing Athletic Accountability Systems To Control Spending At Historically Black Colleges And Universities, Travis A. Blue

Abraham S. Fischler College of Education ETD Archive

Athletic departments at Historically Black Colleges and Universities (HBCU) were not performing well due to anomalies in accounting systems. Further, because the HBCUs lacked the funding, staff, and training necessary to support such programs, strategic plans were needed to help establish better accounting systems in HBCUs. This goal involved training staff within the athletic departments to take full responsibility for their fiscal accountability.

The researcher developed two surveys to provide a quantitative assessment, to make recommendations, and to develop ideas for training that would strengthen the fiscal accountability of athletic department personnel. The research questions for this study were as …