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2001

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Improved Matrix-Assisted Laser Desorption/Ionization Linear Time-Of-Flight Mass Spectrometry Of Oligonucleotides And Nucleic Acids Via Matrix Additives And Sample Preparatory Technique., Tracey Arlene Simmons Jan 2001

Improved Matrix-Assisted Laser Desorption/Ionization Linear Time-Of-Flight Mass Spectrometry Of Oligonucleotides And Nucleic Acids Via Matrix Additives And Sample Preparatory Technique., Tracey Arlene Simmons

LSU Historical Dissertations and Theses

There are two prominent problems recurrent during matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) analysis of oligonucleotides: cation adduction and low molecular ion stability. It has been found that the use of organic base solutions of high gas-phase proton affinity, as used previously in electrospray ionization mass spectrometry (ESI-MS), can significantly reduce the cation adduction problem during MALDI-MS. It is proposed that the organic base solutions compete with alkali metal cations for binding to the phosphodiester backbone of the oligonucleotide upon transfer into the gas phase. A comparison of the utility of adding an organic base solution, such as imidazole, triethylamine …


Isolation And Characterization Of A Rhodobacter Capsulatus Hemc Mutant., Karen Coleman Sullivan Jan 2001

Isolation And Characterization Of A Rhodobacter Capsulatus Hemc Mutant., Karen Coleman Sullivan

LSU Historical Dissertations and Theses

Rhodobacter capsulatus, a purple, nonsulfur photosynthetic bacterium, uses the tetrapyrrole pathway to synthesize four end products: heme, bacteriochlorophyll, vitamin B12, and siroheme. This laboratory has focused on the regulation of the common pathway leading from aminolevulinate to protoporphyrin IX in R. capsulatus. The common portion of the pathway is regulated up to 100-fold by changes in oxygen tension. Research on the regulation of this pathway has been hampered due to a lack of mutants. Until now, the only mutants isolated which block heme production are hemA mutants, which lack aminolevulinate synthase. Since R. capsulatus lacks a cytochrome-independent growth mechanism, mutations …


Catharine Maria Sedgwick's "Hope Leslie": Clues To A Woman's Journey., Sally Mcmillan Tyler Jan 2001

Catharine Maria Sedgwick's "Hope Leslie": Clues To A Woman's Journey., Sally Mcmillan Tyler

LSU Historical Dissertations and Theses

Prevalent in both archetypal and religious literature, the journey motif weaves its way through tales of human growth-stories which grapple with the processes of how people come to be and to know. Such images of identity formation and knowledge construction hold significant implications for the field of education. Indeed, Huebner (1993) notes that "we do not need learning theory or developmental theory to explain human change...The question educators need to ask is not how people learn and develop, but what gets in the way of the great journey---the journey of the self or soul" (p. 405). While Huebner's suggested paradigm …


Effects Of Bilingualism On Cognitive Processing In Adults., Christy J. Witt Jan 2001

Effects Of Bilingualism On Cognitive Processing In Adults., Christy J. Witt

LSU Historical Dissertations and Theses

The primary objective of this dissertation was to empirically test the implications of the code-switching hypothesis (Peal & Lambert, 1962) for nonlinguistic cognitive abilities in bilingual adults. It was hypothesized that bilinguals, by virtue of their ability to switching between two linguistic systems, may enjoy cognitive advantages in the nonlinguistic domain for tasks that require abilities related to language switching. It was postulated that the underlying mechanisms of code switching are the bilingual's abilities to inhibit the processing of irrelevant information and activate previously suppressed information. To determine if a bilingual advantage exists for these abilities, bilingual and monolingual adults …


Analysis And Mathematical Modeling Of Autonomously Oscillating Yeast Cultures., Abdelqader M. Zamamiri Jan 2001

Analysis And Mathematical Modeling Of Autonomously Oscillating Yeast Cultures., Abdelqader M. Zamamiri

LSU Historical Dissertations and Theses

The conditions that precede the onset of autonomous oscillations in continuous yeast cultures were studied in three different types of experiments. It was found that the final state of the culture depends on the protocol used to start-up the reactor. Reaching the desired operating point by slow dilution rate changes gave rise to different final states, two oscillatory states and one steady state, depending on the rate of change in dilution rate. The multiplicity of stable states at a single operating point is not explained by current distributed models and points towards a segregated mechanism of these oscillations. The ability …


Neither Natchez Nor Tara: An Environmental Historial Geography Of The Upper Pearl River Basin Of Mississippi, Protohistoric Period To 1940., Frederick William Sunderman Jan 2001

Neither Natchez Nor Tara: An Environmental Historial Geography Of The Upper Pearl River Basin Of Mississippi, Protohistoric Period To 1940., Frederick William Sunderman

LSU Historical Dissertations and Theses

This study examines the contrasting themes of land degradation and environmental stewardship of farming enterprises in the regional context of the Upper Pearl River Basin of Mississippi. Both the previous imagery and analysis of Southern Cotton Belt agriculture emphasize the profligate nature of farming practices. The contribution this study makes is to amend both the stock images and macro-analyses of Southern cotton culture. Analysis at the sub-regional level demonstrates that many farmers actually practiced sound land management techniques. Reconstructing the experiences of farmers in the Upper Pearl River Basin provides examples of ways in which regional distinctions amend widely conceived …


Analyzing Crime Spatial Patterns Using Remote Sensing And Geographical Information System Technologies: Investigating The Urban Opportunity Structure Model Of Jackson, Mississippi., Tian Wu Jan 2001

Analyzing Crime Spatial Patterns Using Remote Sensing And Geographical Information System Technologies: Investigating The Urban Opportunity Structure Model Of Jackson, Mississippi., Tian Wu

LSU Historical Dissertations and Theses

Crime is a spatial phenomenon. This study has proposed an urban opportunity structure model to understand the spatial patterns associated with crime based on the opportunities defined by urban structure. Any site in an urban space presents crime opportunities; the crime probability at a site is determined by factors such as urban physical settings, the transportation network and land use types. The hypothesized model was tested through the approach of multi-scale spatial analyses comprised of units from precinct maps used by the Jackson Police Department. The scales were defined at different area aggregations. The first scale was set on individual …


Lithium Isotope Geochemistry Of Marine Sediments., Libo Zhang Jan 2001

Lithium Isotope Geochemistry Of Marine Sediments., Libo Zhang

LSU Historical Dissertations and Theses

While the isotope geochemistry of lithium in the marine environment is increasingly known, there are still outstanding problems concerning its oceanic budget and mantle-crust recycling that remain to be resolved. To evaluate the role of marine sediments in the oceanic budget, laboratory experiments were conducted to determine the extent of lithium adsorption on marine sediments and the magnitude of isotopic fractionation. Sediments from the Greenland margin were studied to gain further understanding of the sediment-water interaction. The isotopic compositions of the major types of marine sediments were characterized to understand the sedimentary cycle of lithium. The enhanced database permits a …


Novel Formulation And Application Of Model Predictive Control., Guang-Yan Zhu Jan 2001

Novel Formulation And Application Of Model Predictive Control., Guang-Yan Zhu

LSU Historical Dissertations and Theses

Model predictive control (MPC) has been extensively studied in academia and widely accepted in industry. This research has focused on the novel formulation of model predictive controllers for systems that can be decomposed according to their nonlinearity properties and several novel MPC applications including bioreactors modeled by population balance equations (PBE), gas pipeline networks, and cryogenic distillation columns. Two applications from air separation industries are studied. A representative gas pipeline network is modeled based on first principles. The full-order model is ill-conditioned, and reduced-order models are constructed using time-scale decomposition arguments. A linear model predictive control (LMPC) strategy is then …


Psychosocial Correlates Of Eating Disorder Symptoms In A Young, Black, Female Sample., Nancy Lee Zucker Jan 2001

Psychosocial Correlates Of Eating Disorder Symptoms In A Young, Black, Female Sample., Nancy Lee Zucker

LSU Historical Dissertations and Theses

The present investigation examined the psychosocial correlates of eating disorder symptoms among a young sample of Black female adolescents. Recent epidemiological investigations have documented higher rates of disordered eating in Black females than had previously been reported. Because of the high prevalence of these symptoms both in majority and in minority populations, many eating disorder researchers are promoting preventive strategies to stem further increases in symptom levels. To this end, several longitudinal investigations have been conducted to delineate the risk factors of disordered eating among White adolescent populations. However, Black adolescents have been minimally represented in these samples. Thus, there …


A New Testament Geography: Description, Perspectives, And Implications For The Field Of Geography., George Alphin Jan 2001

A New Testament Geography: Description, Perspectives, And Implications For The Field Of Geography., George Alphin

LSU Historical Dissertations and Theses

The general purpose of this study is to relate the fields of geography and religion at both the academic and the practical levels. Primarily, it investigates the New Testament description of the land and its human occupancy. Secondarily, it identifies New Testament attitudes toward geography and suggests implications for its study and practice. It describes the geography, both physical and human, for each of the five classes of the document's book in a separate chapter. The chapter on the synoptic gospels discusses mountains, weather, biogeography, agriculture, occupations, and urban geography. Four kinds of soil reveal different responses to the word. …


A Study Of Stellar Orbits In A Rotating, Gaseous Bar., Eric Ian Barnes Jan 2001

A Study Of Stellar Orbits In A Rotating, Gaseous Bar., Eric Ian Barnes

LSU Historical Dissertations and Theses

In an effort to better understand the formation and evolution of barred galaxies, the properties of orbits in the effective potential of one specific model of a rapidly rotating, steady-state gas-dynamical bar that has been constructed via a self-consistent hydrodynamical simulation have been examined. This bar is used to test the following idea. If primordial galaxies evolve to a rapidly rotating, bar-like configuration before a significant amount of star formation has taken place, and then stars form from the gas that makes up the bar, the initial stellar distribution function should be much different than those used in previous bar …


Faulkner And The Great Depression: Aesthetics, Ideology, And The Politics Of Art., Theodore B. Atkinson Iii Jan 2001

Faulkner And The Great Depression: Aesthetics, Ideology, And The Politics Of Art., Theodore B. Atkinson Iii

LSU Historical Dissertations and Theses

William Faulkner's most concentrated and flourishing phase of literary production virtually coincided with the Great Depression, yet the relationship between these two monumental developments in American cultural history has remained for the most part unexplored. Consequently, a more complete understanding of Faulkner can be achieved by redressing this critical oversight. Such an endeavor must involve reconstituting relevant features of historical and cultural context so as to comprehend the forces informing Faulknees literary production. A critical approach rooted in Marxist literary theory is useful in this regard, for it challenges persistent notions of Faulkner as a writer resistant to contextual influences …


Kinetic And Mechanistic Studies Of A Bimetallic Hydroformylation Catalyst., Novella Nicole Bridges Jan 2001

Kinetic And Mechanistic Studies Of A Bimetallic Hydroformylation Catalyst., Novella Nicole Bridges

LSU Historical Dissertations and Theses

Dicationic bimetallic rhodium complexes based on the novel binucleating tetraphosphine ligand system racemic-Et2PCH2CH 2P(Ph)CH2P(Ph) CH2CH2PEt2, et,ph-P4, are highly active and selective hydroformylation catalysts that make use of bimetallic cooperativity to operate. In situ FT-IR and NMR studies indicate that the most active catalyst is the unique dinuclear dicationic hydrido-carbonyl Rh(+2) oxidation state complex, [racemic-Rh 2H2(mu-CO)2(CO)2(et,ph-P4) 2+]. A kinetic study was performed to determine the rate orders of the dinuclear dicationic catalyst, and the substrate (1-hexene). The rate orders were found to be one for both components. The study was also performed to test the hypothesis of a bis-acyl species, which …


The Remote Neuropsychological Assessment -Category Test: Development And Validation Of A Computerized, Internet -Based Neuropsychological Assessment Measure., Jeffrey Nicholas Browndyke Jan 2001

The Remote Neuropsychological Assessment -Category Test: Development And Validation Of A Computerized, Internet -Based Neuropsychological Assessment Measure., Jeffrey Nicholas Browndyke

LSU Historical Dissertations and Theses

In the current investigation, a prototype for the remote assessment of cognitive skills, the "remote neuropsychological assessment (RNA) model," was proposed, and the development and validation of a computerized, Internet-based neuropsychological assessment measure was undertaken to demonstrate the utility and effectiveness of this untapped model of assessment delivery. The Remote Neuropsychological Assessment-Category Test (RNA-CT), a test of abstract concept formation administered via the World Wide Web (WWW), was developed and contrasted with a conventional, non-computerized version of the measure---the Booklet Category Test (BCT). Traditional and novel measurement variables from both measures were compared in a randomized group design of normal …


Coming Home: Black Return Migration To The Yazoo -Mississippi Delta., Robert Norman Brown Ii Jan 2001

Coming Home: Black Return Migration To The Yazoo -Mississippi Delta., Robert Norman Brown Ii

LSU Historical Dissertations and Theses

Between 1910 and 1970, African Americans moved out of South in one of the largest movements in human history. Today, many of these migrants, and their descendents, are coming home. Some estimates hold that more than nine million black Southerners left the South for new lives in the North and West. The migration reached its peak in the 1950s, and began to slow in the 1960s. In the early 1970s, African Americans began returning to the American South. With major shifts in the United States economy, a change that began in the early 1970s, jobs began to leave the traditional …


Active Control Of Thermoacoustical Instabilities., Daniel Ulises Campos-Delgado Jan 2001

Active Control Of Thermoacoustical Instabilities., Daniel Ulises Campos-Delgado

LSU Historical Dissertations and Theses

This dissertation presents some advances in active control of thermoacoustic instabilities in combustion chambers. Large-size gaseous and liquid fueled swirl stabilized combustors were used during the studies. Active control was implemented using different types of actuators. Proportional (loudspeakers and fuel valves) and discrete actuators (open-close automotive fuel injectors) were investigated. Acoustic and fuel modulation control were successfully applied. In large-scale combustors, flame stabilization techniques such as swirl add three dimensional characteristics to the flow. Moreover, the induced turbulence creates highly nonlinear interactions in the system. Thus, in order to capture these characteristics nonlinear partial differential equations have to be used. …


Characteristics And Use Of Thin Metals On Modified Glass Substrates., Sonya Latrice Caston Pierre Jan 2001

Characteristics And Use Of Thin Metals On Modified Glass Substrates., Sonya Latrice Caston Pierre

LSU Historical Dissertations and Theses

Ultra-thin films of Au are formed on glass by thermal evaporation of Au onto a silane-modified glass surface. Monolayers of 3-aminopropyltriethoxysilane on glass (APS/glass) are outstanding surfaces for the formation of adherent, electrically conductive, smooth, and highly oriented Au films. Scanning tunneling microscopy images indicate that ultra-thin Au films are highly conductive and have a significant {111} texture, and X-ray diffraction studies confirm the latter. In addition, Au films on APS/glass surface are not removed by tape tests, pointing to a strong chemical interaction between the Au and amine surface. Unlike metal adhesion promoters, APS layer does not diffuse through …


It Rarely Occurs: Mock Juror Reactions To A Physician's Defense In A Lack Of Informed Consent Case., Douglas J. Zickafoose Jan 2001

It Rarely Occurs: Mock Juror Reactions To A Physician's Defense In A Lack Of Informed Consent Case., Douglas J. Zickafoose

LSU Historical Dissertations and Theses

Three experiments examine how expressions of probability concerning why a risk involved in a medical procedure was not disclosed influence mock juror decisions (e.g., liability, culpability, and damage awards). Across all three experiments, no differences were found in mock juror judgments of liability due to the probability expression used, be it verbal, quantitative, percentage, or frequency. Furthermore, differences in mean damage awards were only found when psychological uncertainty was manipulated using a frequency expression. However, an examination of the median damage awards suggests that some expressions of probability are likely to result in higher damage awards than others. Thus, while …


Mapping Enredos Of Complex Spaces. A Regional Geography Of Olancho, Honduras., Mark Andrew Bonta Jan 2001

Mapping Enredos Of Complex Spaces. A Regional Geography Of Olancho, Honduras., Mark Andrew Bonta

LSU Historical Dissertations and Theses

This dissertation is a regional geography of the department of Olancho in northeastern Honduras. It focuses on the enredos (entangled situations) that characterize geographic reality, particularly in the interlocked domains of nation-state priorities, local identities, rain forest conservation, and sustainable development. The overarching theoretical framework of this dissertation is the collaborative work of complexity theorists Gilles Deleuze and Felix Guattari. The major theme running through "Mapping Enredos" is the multidimensional nature of spatiality (complex spaces), ground for human and non-human existence as well as source of endless conflicts. Fieldwork was undertaken from 1999 to 2000. Qualitative research methods employed include …


Transition To Work: A Study Of New College Graduates., Carolyn Carter Collins Jan 2001

Transition To Work: A Study Of New College Graduates., Carolyn Carter Collins

LSU Historical Dissertations and Theses

The success of the transition to work is affected by many factors, including the organization entry process itself. Research shows that the first year of employment is a critical time period and the organizational entry process is not dearly understood. The central focus of this study was to determine what exactly do new college graduates encounter as they enter the workplace, and does that experience affect their opinions and attitudes. Further, do women and African Americans have a similar or different experiences than white males in the transition process. An exploratory descriptive study of a random sample of Louisiana State …


Protecting 'Place' In African -American Neighborhoods: Urban Public Space, Privatization, And Protest In Louis Armstrong Park And The Treme, New Orleans., Michael Eugene Crutcher Jr Jan 2001

Protecting 'Place' In African -American Neighborhoods: Urban Public Space, Privatization, And Protest In Louis Armstrong Park And The Treme, New Orleans., Michael Eugene Crutcher Jr

LSU Historical Dissertations and Theses

In the past fifteen years, urban scholars have increasingly studied "the end of public space." Central to their arguments are the thesis that these communal spaces, traditionally held by city governments and theoretically open for use by all citizens, are waning. Much of this space has become "privatized." Corporations and individuals often buy, renovate, and design such spaces either in conjunction with city programs or as part of their urban renewal, gentrification, and development plans. These plans often seek to exclude certain minority groups or target spaces in low-income communities. The process is largely driven by the present need for …


An Exploration Of Middle And High School Students' Perceptions Of Deviant Behavior When Using Computers And The Internet., Annie Jean Harris Daniel Jan 2001

An Exploration Of Middle And High School Students' Perceptions Of Deviant Behavior When Using Computers And The Internet., Annie Jean Harris Daniel

LSU Historical Dissertations and Theses

If the current trend continues, the use of computer technologies and the Internet will increase for teaching and education. It is urgent that researchers study computer and Internet deviance. The purpose of this study was to explore middle and high school students' perceptions of deviant behavior when using computers and the Internet. The target population for this study was middle and high school students. The accessible population included all students who attended a middle or high school in the East Baton Rouge Parish School which has computers that are capable of accessing the Internet (1,150 students---575 middle school students and …


Resorcinol Condensation Products: A New Class Of Colorimetric Sensors For Saccharides., Claude Joseph Davis Jan 2001

Resorcinol Condensation Products: A New Class Of Colorimetric Sensors For Saccharides., Claude Joseph Davis

LSU Historical Dissertations and Theses

Resorcinarenes are a unique class of cyclic aromatic tetramers that have been known for over a century. In our laboratories, we have reported the first synthesis, isolation, and characterization of resorcinarenes with arylboronic acid functionality their framework. The physical property studies of our new resorcinarene series resulted in covalent and non-covalent binding studies, which revealed the first evidence chair (c2h) resorcinarenes can compete effectively with their crown (c4v ) counterparts the binding of polar guests (i.e. carbohydrates). In addition, the chiral tetraarylboronate octols have demonstrated potential utility as substrates for stereoselective extractions carbohydrates. A facile method for detecting and monitoring …


Effects Of The High -Probability Sequence With And Without Extinction In Children With Feeding Disorders., Jennifer Eileen Dawson Jan 2001

Effects Of The High -Probability Sequence With And Without Extinction In Children With Feeding Disorders., Jennifer Eileen Dawson

LSU Historical Dissertations and Theses

The effects of the high-probability instructional sequence, with and without extinction, on increasing compliance to eat in three children with severe food refusal and selectivity were evaluated. Pediatric feeding disorders, in which children refuse most or all food and drink, are a rare and life threatening problem that requires intensive treatment. The majority of behavioral techniques used with feeding disordered children manipulate the consequence of food refusal. The use of antecedent procedures in the treatment of food refusal has been limited. One antecedent technique, the high-probability instructional sequence, involves first presenting the individual with a series of instructions that he/she …


Molding Large Area Plastic Parts Covered With Harms., Mircea Stefan Despa Jan 2001

Molding Large Area Plastic Parts Covered With Harms., Mircea Stefan Despa

LSU Historical Dissertations and Theses

Injection molding and hot embossing proved to be suitable for use to reproduce layouts of micropatterns manufactured by LIGA. The research work was based on two commercially available machines. Preliminary experiments with both machines indicated that several modifications and additions were necessary to adapt the injection machine and the embossing press for microreplication. For the injection machine, a mold geometry was designed to ensure minimal pressure loss upstream from the entrance into the mold cavity, and optimal shape for molding and demolding. For the hot embossing press, a vacuum chamber was designed containing the embossing sandwich, with the temperatures of …


Home And Classroom Learning Environment Correlates Of Academic Self -Efficacy In Middle School Mathematics., Thaddeus Theodore Claiborne Jan 2001

Home And Classroom Learning Environment Correlates Of Academic Self -Efficacy In Middle School Mathematics., Thaddeus Theodore Claiborne

LSU Historical Dissertations and Theses

This study investigated the relationship between home and classroom learning environment characteristics and middle school students' self-efficacy beliefs about mathematics. Specifically, the study examined linkages between sources of efficacy in the home and classroom learning environments and the strength of students' self-efficacy beliefs in mathematics. Social cognitive theory includes self-efficacy beliefs as a major source of human agency and functioning (Bandura, 1997). Enactive mastery experiences, vicarious learning (modeling), verbal persuasion, and physiological/affective states (emotional arousal) are four sources of human efficacy. While numerous studies have been completed linking self-efficacy to learning and achievement (Pajares, 1996b), no studies within schools were …


Factors Affecting Community Structure Of Mangroves Associated With Point Bars And Islands In A Costa Rican Estuary., Patricia Delgado-Sanchez Jan 2001

Factors Affecting Community Structure Of Mangroves Associated With Point Bars And Islands In A Costa Rican Estuary., Patricia Delgado-Sanchez

LSU Historical Dissertations and Theses

A conceptual model of relationships between mangrove community structure and their physico-chemical environment is developed for point bars and islands in the Tempisque-Bebedero estuarine system, Pacific coast, Costa Rica. The model identifies key variables whose relationships to mangrove forest structure are the focus of extended field and mesocosm studies. Point bars and islands are very dynamic features constantly modified by hydrology and sediment dynamics. In the Tempisque-Bebedero system, they are additionally modified by extensive agricultural activities. High riverine sediment loads, associated with irrigation and seasonal wind-driven resuspension, result in significantly higher sediment deposition in lower intertidal zones; upper intertidal zones …


A Performer's Guide To Theatrical Elements In Selected Trombone Literature., Cason Austin Duke Jan 2001

A Performer's Guide To Theatrical Elements In Selected Trombone Literature., Cason Austin Duke

LSU Historical Dissertations and Theses

In the last forty years, many new solo and chamber pieces have been written for the trombone which involve elements of a theatrical nature, including lighting, make-up, costume, stage direction, dialogue/narration, sound effects, props, and audience interaction. It is difficult for a trombonist searching for music to discern a piece's theatrical nature by its listing in most catalogs. This document has attempted to solve that problem by gathering pieces that share these elements into an annotated collection. Nearly 200 pieces were discovered through contacts made with individual trombonists, composers, and publishers around the world. Of these, over sixty were acquired …


Electronic Communication Channels In Franchise Organizations., Michael Hebert Dickey Jan 2001

Electronic Communication Channels In Franchise Organizations., Michael Hebert Dickey

LSU Historical Dissertations and Theses

The virtual organization has emerged as a result of the availability of information technology. One business model well suited to the virtual form is franchising. Since the success of franchise organizations is highly dependent on communication effectiveness, these organizations are beginning to adopt technology---namely, private corporate networks called intranets and extranets---to support electronic communication. This research study examines the effects of electronic communication channels on communication patterns within franchise organizations. First, the study addresses how electronic communication channels affect communication frequency within the franchise organization. Second, the effect of electronic communication channels on strategic outcomes, specifically, innovation, franchisee satisfaction, and …