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Biomechanical Reconstruction Of The Appendicular Skeleton In Three North American Jurassic Sauropods, Ray Wilhite Jan 2003

Biomechanical Reconstruction Of The Appendicular Skeleton In Three North American Jurassic Sauropods, Ray Wilhite

LSU Doctoral Dissertations

Forelimb and hindlimb articulation, reconstructed musculature, and function were examined in Apatosaurus, Diplodocus, and Camarasaurus. A technique was developed using a Microscribe three-dimensional digitizer to capture external morphological data for skeletal reconstruction and determination of taxonomically useful features. The appendicular musculature of Alligator mississippiensis was dissected to determine form, function, origin, and insertion of muscles to aid in reconstruction of sauropod musculature. Contrary to the literature, M. caudofemoralis longus was found to originate primarily from the lateral surfaces of the proximal chevrons instead of the bodies and transverse processes of the caudals, demonstrating that chevron morphology is indicative of the …

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Immunological, Hematological, And Serum Biochemical Effects Of High Level Dietary Fish Oil And Vitamin E Supplementation In The Dog, Casey J. Leblanc Jan 2003

Immunological, Hematological, And Serum Biochemical Effects Of High Level Dietary Fish Oil And Vitamin E Supplementation In The Dog, Casey J. Leblanc

LSU Doctoral Dissertations

Inflammation is a component of the innate immune response. However, severe or prolonged inflammation can be detrimental. Dietary n-3 fatty acid supplementation has proven clinical benefits in chronic inflammatory diseases, most likely due to reduced synthesis of inflammatory mediators and inhibition of lymphocyte proliferation and function. The purposes of this study were to characterize alterations in inflammatory mediator production, and lymphocyte proliferation, in dogs fed a diet consisting of 0.65% n-3 fatty acids (DMB) with an n-6:n-3 fatty acid ratio of 3.4:1. Fifteen dogs were randomly assigned to one of three dietary groups for twelve weeks. Group Sunflower oil received …

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Bioavailability And Bioaccumulation Of Sediment-Associated, Desorption-Resistant Fraction Of Polycyclic Aromatic Hydrocarbon Contaminants, Xiaoxia Lu Jan 2003

Bioavailability And Bioaccumulation Of Sediment-Associated, Desorption-Resistant Fraction Of Polycyclic Aromatic Hydrocarbon Contaminants, Xiaoxia Lu

LSU Doctoral Dissertations

This study is directed toward identifying and characterizing the bioavailability of both reversibly sorbed and desorption-resistant fraction of hydrophobic organic contaminants in natural biologically active sediments and the corresponding consequences to prediction, control and regulation of these contaminants. The focus is on polycyclic aromatic hydrocarbons (PAHs) with particular emphasis on phenanthrene and benzo[a]pyrene. A quantity of well-characterized and extensively desorbed sediments was prepared by desorbing the lab-inoculated sediment with an isopropanol and electrolyte solution. This procedure was proved to be a very effective method to prepare sediments containing contaminants largely limited to a desorption-resistant compartment. Accumulation of contaminants in the …

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Thrips Species Composition In Louisiana Cotton And Associated Management Strategies, Donald Ray Cook Jan 2003

Thrips Species Composition In Louisiana Cotton And Associated Management Strategies, Donald Ray Cook

LSU Doctoral Dissertations

The common species of thrips infesting cotton seedlings include flower thrips, Frankliniella tritici (Fitch); tobacco thrips, Frankliniella fusca (Hinds); western flower thrips, Frankliniella occidentalis (Pergande); onion thrips, Thrips tabaci (Lindeman); and soybean thrips, Neohydatothrips variabilis (Beach). In surveys of cotton seedlings at several locations in Louisiana, tobacco thrips was the most common species. The occurrence of flower thrips and soybean thrips was variable. Western flower thrips accounted for < 15% of adults collected at all locations, except two. The performance of acephate and imidacloprid applied as seed treatments and in-furrow, and aldicarb applied in-furrow was evaluated for thrips management across different production environments. Insecticide treatments reduced thrips densities and delayed development of thrips larval populations. The at-planting insecticides influenced thrips species composition in some instances. In studies to evaluate the effects of winter-spring vegetation type (native vegetation and wheat) on aldicarb efficacy, vegetation type did not influence thrips densities on cotton, with one exception. Aldicarb reduced thrips densities regardless of vegetation type. Vegetation type or insecticide treatments did not influence lint yield. Increasing aldicarb rates generally did not improve thrips control. Aldicarb rates currently recommended in conventional tillage systems should be adequate for systems that incorporate winter-spring vegetation as cover crops. Additional studies were conducted to further investigate the influence of thrips on crop maturity and yield. The addition of an at-planting insecticide improved lint yield in one of six tests. Thrips infestations did not affect crop maturity, and with few exceptions boll distribution and boll retention. The majority of these exceptions were associated with the test where the addition of an at-planting insecticide improved lint yield. Several soil applied at-planting insecticides were evaluated against tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), in a field caged infestation study. Acephate and imidacloprid provided little control of tarnished plant bugs. Thiamethoxam and aldicarb resulted in ≥ 50% tarnished plant bug mortality until 10 and 18 DAE, respectively. These are the first reports of western flower thrips infesting cotton seedlings in Louisiana. The addition of an at-planting insecticide provided control of thrips, but affects on crop maturity and yield were variable.

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Characterization Of Native And Bypass Human Coronary Artery Plaque Deposits From The Same Heart: Investigation Of The Chemical Form Of Calcium In Human Coronary Artery Plaque Deposits, Serigne Thiam Jan 2003

Characterization Of Native And Bypass Human Coronary Artery Plaque Deposits From The Same Heart: Investigation Of The Chemical Form Of Calcium In Human Coronary Artery Plaque Deposits, Serigne Thiam

LSU Doctoral Dissertations

Gradual deposits of lipids, proteins, and calcium on the coronary arterial walls cause atherosclerosis, leading to blockage of the blood flow and possible heart attack. Despite many studies, the mechanism underlying these processes remains unclear. In this research, differences between native and bypass plaque deposits from the same heart were examined. In addition, the crystalline and the amorphous plaques within these native and bypass vessels were characterized. The techniques used to characterize the deposits included inductively coupled plasma mass spectrometry (ICPMS), solid-state nuclear magnetic resonance (NMR), high performance liquid chromatography (HPLC), etc. The results from the ICPMS technique showed that …

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The Impact Of Whole-Plant Instruction Preservice Elementary Teachers' Understanding Of Plant Science Principles, Christine Collins Hypolite Jan 2003

The Impact Of Whole-Plant Instruction Preservice Elementary Teachers' Understanding Of Plant Science Principles, Christine Collins Hypolite

LSU Doctoral Dissertations

The purpose of this research was to determine how an inquiry-based, whole-plant instructional strategy would affect preservice elementary teachers’ understanding of plant science principles. This study probed: what preservice teachers know about plant biology concepts before and after instruction, their views of the interrelatedness of plant parts and the environment, how growing a plant affects preservice teachers’ understanding, and which types of activity-rich plant themes studies, if any, affect preservice elementary teachers’ understandings. The participants in the study were enrolled in two elementary science methods class sections at a state university. Each group was administered a preinstructional test at the …

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Pollen Dispersal And Deposition In The High-Central Andes, South America, Carl A. Reese Jan 2003

Pollen Dispersal And Deposition In The High-Central Andes, South America, Carl A. Reese

LSU Doctoral Dissertations

This dissertation uses fossil (ice core) and modern pollen samples collected throughout the central Andes to investigate the paleovegetational changes in the area as well as the modern dispersal and depositional characteristics of pollen in this region of South America. The results of the fossil pollen study on Mt. Sajama reveal a vegetation history that closely corresponds to the chemical and physical records already published from the mountain. Pollen becomes abundant after 15,000 B.P. and suggests the occurrence of two distinct phases between 15,000 and 12,000 B.P. (a short interstadial and the Deglacial Climatic Reversal). After 12,000 B.P., there is …

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Carbonic Anhydrase And Carbonic Anhydrase Like Genes Of Chlamydomonas Reinhardtii, Mautusi Mitra Jan 2003

Carbonic Anhydrase And Carbonic Anhydrase Like Genes Of Chlamydomonas Reinhardtii, Mautusi Mitra

LSU Doctoral Dissertations

Carbonic anhydrase (CA) is a zinc containing metalloenzyme that catalyzes the reversible interconversion of CO2 and HCO3-. There are three evolutionarily unrelated CA families designated alpha, beta and gamma CA. Vertebrates have members of the alpha CA family, while higher plants, algae and cyanobacteria have members belonging to all three CA families. In the green alga, Chlamydomonas reinhardtii, five CAs have previously been identified including three alpha CAs and two beta CAs. This dissertation describes the identification and characterization of new CA genes from C. reinhardtii. Four new CA or CA like genes have been discovered including two beta CAs …

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Local Land Use On Borneo: Applications Of Indigenous Knowledge Systems And Natural Resource Utilization Among The Benuaq Dayak Of Kalimantan, Indonesia, Stacy Marie Crevello Jan 2003

Local Land Use On Borneo: Applications Of Indigenous Knowledge Systems And Natural Resource Utilization Among The Benuaq Dayak Of Kalimantan, Indonesia, Stacy Marie Crevello

LSU Doctoral Dissertations

Indonesia as a nation faces the formidable task of balancing sustainable economic activity, conservation goals, and continuation of traditional indigenous life ways. This research encompasses a broad but integrated system of human-land relationships among the Benuaq Dayak, an indigenous group who maintain their customary laws and land use systems. The study identifies and analyzes instances of community related land management and resource utilization in the interior of Borneo. As forest dwelling people, the environment has shaped the culture and life ways of the Dayak. They have developed a complex system of cultural aspects in relation to the forest that they …

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The Ecology Of Two Estuarine-Dependent Tonguefishes, The Blackcheek Tonguefish (Symphurus Plagiusa) And The Offshore Tonguefish (S. Civitatium), In Coastal Louisiana, Theodore Scott Switzer Jan 2003

The Ecology Of Two Estuarine-Dependent Tonguefishes, The Blackcheek Tonguefish (Symphurus Plagiusa) And The Offshore Tonguefish (S. Civitatium), In Coastal Louisiana, Theodore Scott Switzer

LSU Doctoral Dissertations

The pattern and process of wetland loss in coastal Louisiana has the potential to influence the distribution and abundance of fishes and macroinvertebrates that utilize inshore estuarine habitat as nurseries during their early life histories. Current management plans designed to stabilize marsh elevations, such as freshwater diversions, may also influence the distribution and abundance of estuarine-dependent nekton. Given the importance of nursery function of inshore estuaries in coastal Louisiana, it is of interest to explore the response of estuarine-dependent organisms to environmental gradients. To this end I examined the ecology of two sympatric tonguefishes, the blackcheek tonguefish (Symphurus plagiusa) and …

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Systematics And Cophylogenetics Of Toucans And Their Associated Chewing Lice, Jason David Weckstein Jan 2003

Systematics And Cophylogenetics Of Toucans And Their Associated Chewing Lice, Jason David Weckstein

LSU Doctoral Dissertations

Historically, comparisons of host and parasite phylogenies have concentrated on cospeciation. However, many of these comparisons have demonstrated that the phylogenies of hosts and parasites are seldom completely congruent, suggesting that phenomena other than cospeciation play an important role in the evolution of host-parasite assemblages. Other coevolutionary phenomena, such as host switching, parasite duplication (speciation on the host), sorting (extinction), and failure to speciate can also influence host-parasite assemblages. In this dissertation I explore several aspects of the evolutionary history of Ramphastos toucans and their ectoparasitic chewing lice using molecular phylogenetic and cophylogenetic reconstructions. First, using mitochondrial DNA sequences, I …

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The Impact Of A Life-Application Learning Instructional Program On Struggling Readers At The Middle School Level, Angelle Rae Stringer Jan 2003

The Impact Of A Life-Application Learning Instructional Program On Struggling Readers At The Middle School Level, Angelle Rae Stringer

LSU Doctoral Dissertations

This eight-week descriptive study examined the impact of the incorporation of a Life-Application Learning Methods Program on struggling middle school readers. Two questions were explored: 1) How did incorporating life–application learning into the middle school curriculum impact reading motivation?, and 2) How did incorporating life-application learning in the middle school curriculum impact the reading levels? Participants in the study were eight eighth-grade students considered to be struggling readers Qualitative methods were used for this study utilizing responses from a survey, two inventories, student journals, and researcher observations. Data gathered suggested that students are more likely to become motivated and engaged …

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The Effects Of Message Direction And Sex Differences On The Interpretation Of Workplace Gossip, Kristen Marie Berkos Jan 2003

The Effects Of Message Direction And Sex Differences On The Interpretation Of Workplace Gossip, Kristen Marie Berkos

LSU Doctoral Dissertations

Gossip occurs in the organization and individuals exposed to these gossip messages must decide how to interpret the gossip. This dissertation explains the definitions and research for gossip, message direction, sex differences, message interpretation, politicalism, and believability. Applying symbolic interactionism and social exchange theory, seven relationships between variables are proposed. The seven hypotheses are tested via a web-based questionnaire that manipulated the message direction and sex of the gossiper and gossip receiver. Two hundred seventy-six full time employees completed instruments measuring gossip believability, purpose, and politicalism. Data were subjected to a MANCOVA, and correlation statistics. Results supported three of the …

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Psychosocial Predictors Of Visceral Adiposity, Paula C. Rhode Jan 2003

Psychosocial Predictors Of Visceral Adiposity, Paula C. Rhode

LSU Doctoral Dissertations

Psychosocial factors are thought to influence health through primarily direct physiological mechanisms or the alteration of health related behaviors. Three factors hypothesized to negatively impact health include arousal, life stress, and depressive symptomatology. One recent theorist suggests that the interaction between psychological stress and stress hormones on the neuroendocrine system may result in adverse changes to body composition, most notably the increased deposition of visceral adipose tissue (Bjorntorp, 1993). The current study prospectively examined the relationship between self-reported stressful life events, depressive symptoms and trait arousal on the deposition of visceral fat, as measured by computerized tomography (CT). Subjects were …

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Wood Laminated Composite Poles, Cheng Piao Jan 2003

Wood Laminated Composite Poles, Cheng Piao

LSU Doctoral Dissertations

Wood composite poles are new engineered products with polygonal shapes and bonded with synthetic resins. The poles have multiple advantages over the solid wood poles and are a promising solid pole substitute in power transmission, telecommunication, and cable TV services. The use of composite poles may reduce the cost both in materials and manipulation, and facilitate installation and treatment. It is necessary to evaluate the factors that affect their properties and construct theoretical and analytical models to analyze these properties. Experiments were conducted to investigate strip thickness and number of strips’ (NOS) effects on the flexural properties and shear stress …

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Potential Functionality And Digestibility Of Oryzanol As Determined Using In Vitro Cell Culture Models, Chih-Chun Jean Huang Jan 2003

Potential Functionality And Digestibility Of Oryzanol As Determined Using In Vitro Cell Culture Models, Chih-Chun Jean Huang

LSU Doctoral Dissertations

A mouse lymphatic endothelial cell (SVEC4-10) model and a human intestinal cell (C2BBe1) model in vitro were developed and capable to be used to study antioxidant activity, hypocholesterolemic capability and digestibility of γ-oryzanol. The critical and vital parameters in developing these cell models were the emulsion preparation of hydrophobic compounds for cell models, the consistent management of cell culture, and the selection of cell viability detection methods compatible with the cell lines and the test substances. The results showed that, in some situations, γ-oryzanol could present a more effective antioxidant activity than α-tocopherol, in terms of reducing tert-butyl hydroperoxide promoted …

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Synchrotron Radiation As A Probe Of Chemical Information Using Novel Experimental Configurations, George Farquar Jan 2003

Synchrotron Radiation As A Probe Of Chemical Information Using Novel Experimental Configurations, George Farquar

LSU Doctoral Dissertations

Determination of chemical information with synchrotron radiation is an area of great scientific interest, and expanding the range of available techniques is the topic of this dissertation. The experimental methods described herein allows for a significant advancement of the availability of subtle chemical information. This dissertation uses ionizing radiation to study three chemical systems. First, the l=3 shape resonance in CO is investigated using a cryogenically cooled gas jet. Shape resonant effects have been studied for many years. Previously, this was accomplished on the vibrational structure of molecules with a limited ability to determine the rotational substructure effects. A dramatic …

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Uncovering Strata: An Investigation Into The Graphic Innovations Of Geologist Henry T. De La Beche, Renee M. Clary Jan 2003

Uncovering Strata: An Investigation Into The Graphic Innovations Of Geologist Henry T. De La Beche, Renee M. Clary

LSU Doctoral Dissertations

An historical investigation into the types of illustrations in the Golden Age of Geology (1788-1840) revealed the nature and progression of graphic representation at the dawning of geology as a science. Exhaustive sampling of geology texts published in the period of focus proceeded until saturation was achieved. Qualitative analysis and evaluation of early illustrations were accomplished with Edward R. Tufte's theory of graphic design. Hypothesis testing around a correlation coefficient revealed significance at the 99% confidence level for relationships between publication year and number of included graphics, and publication year and the graphic density of texts. Henry T. De la …

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Studies On Rice Transformation And The Use Of Transformed Plants [Electronic Resource], Qiming Shao Jan 2003

Studies On Rice Transformation And The Use Of Transformed Plants [Electronic Resource], Qiming Shao

LSU Doctoral Dissertations

This research was conducted to enhance utilization of the Liberty herbicide resistance transgene in rice. Non-lethal methods to determine the sensitivity of transgenic rice plants to hygromycin B and Liberty were developed, tested and used in this research. Four homozygous transformed plants were selected to make reciprocal crosses with their non-transformed parent cultivars Taipei 309 and Nipponbare. Their resistances to Liberty and hygromycin B were controlled by the closely linked single dominant genes bar and hpt. Some non-resistant phenotypes in the F2 populations were due to gene silencing. The bar gene in some of these plants were allelic and some …

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Genetic Mapping Of Agronomic Traits From The Interspecific Cross Of Oryza Sativa (L.) And Oryza Glaberrima (Steud.), Gabriel Kayode Aluko Jan 2003

Genetic Mapping Of Agronomic Traits From The Interspecific Cross Of Oryza Sativa (L.) And Oryza Glaberrima (Steud.), Gabriel Kayode Aluko

LSU Doctoral Dissertations

Wild relatives of cultivated rice varieties offer new genetic sources for enhancing economic value, but traditional interval mapping techniques have not gained widespread support among applied researchers for marker assisted selection. The objectives of this study were to detect quantitative trait loci (QTL) for agronomic traits in a hybrid mapping population and compare the non-parametric Discriminant Analysis (DA) procedure with traditional approaches for accuracy and precision. In addition, the effects of population structure on marker-assisted classification were explored. A molecular linkage map comprising 100 SSR markers that spanned the rice genome at intervals of 10.5 cM on the average was …

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The Trouble With Girls: Autoethnography And The Classroom, Pamela Kay Autrey Jan 2003

The Trouble With Girls: Autoethnography And The Classroom, Pamela Kay Autrey

LSU Doctoral Dissertations

Recent research suggests that many young women are undergoing a particularly difficult time during early adolescence, beginning with the transition to middle school (The National Center on Addiction and Substance Abuse at Columbia University [CASA], 2003; Albert, Brown, & Flanigan, 2003; American Association of University Women, 1992). Employing autoethnography, I studied my experience as girl and woman, student and teacher, in elementary and middle schools and how these informed my pedagogical practices and knowledge as an elementary school teacher. Drawing upon feminist theory and cultural studies as well as research narratives, I argue for the inclusion of "kinderculture" in the …

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Adherence To Medical Regimens In Low-Income Adults With Type 2 Diabetes: The Influence Of Perceived Control Constructs, Erin L. O'Hea Jan 2003

Adherence To Medical Regimens In Low-Income Adults With Type 2 Diabetes: The Influence Of Perceived Control Constructs, Erin L. O'Hea

LSU Doctoral Dissertations

Individuals with Type 2 diabetes often do not adhere to their treatment regimens (e.g., exercise, diet, medication, glucose monitoring). Non-adherence results in poor metabolic control, further morbidity and mortality, and increased health care utilization and costs. One common thread among many health-behavior-theories that attempt to explain non-adherence behaviors is the importance of perceived control. This psychosocial variable has most often been conceptualized as ‘health locus of control,’ which refers to the belief that one has the ability to influence or change one’s health outcomes. Inconsistent findings have been reported regarding the relationship of health locus of control and medical regimen …

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Block-Level Discrete Cosine Transform Coefficients For Autonomic Face Recognition, Willie L. Scott, Ii Jan 2003

Block-Level Discrete Cosine Transform Coefficients For Autonomic Face Recognition, Willie L. Scott, Ii

LSU Doctoral Dissertations

This dissertation presents a novel method of autonomic face recognition based on the recently proposed biologically plausible network of networks (NoN) model of information processing. The NoN model is based on locally parallel and globally coordinated transformations. In the NoN architecture, the neurons or computational units form distributed networks, which themselves link to form larger networks. In the general case, an n-level hierarchy of nested distributed networks is constructed. This models the structures in the cerebral cortex described by Mountcastle and the architecture based on that proposed for information processing by Sutton. In the implementation proposed in the dissertation, the …

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Effects Of Fire Intensity On Groundcover Shrubs In A Frequently Burned Longleaf Pine Savanna, Jarrod Matthew Thaxton Jan 2003

Effects Of Fire Intensity On Groundcover Shrubs In A Frequently Burned Longleaf Pine Savanna, Jarrod Matthew Thaxton

LSU Doctoral Dissertations

Variation in fire intensity may affect the structure and composition of frequently burned plant communities. I hypothesize that small-scale variation in fuel loads affects fire intensity within single fires in frequently burned savannas. Furthermore, I expect that local differences in fire intensity produce predictable patterns to the demography of groundcover shrubs. I tested these hypotheses by manipulating fuel loads in a longleaf pine savanna. Fuel load treatments consisted of fine fuel removal, pine needle addition, wood addition and unaltered control, mimicking naturally occurring fuel load variation. Treatments were repeated in 1m2 subplots over two sets of biennial burns and shrub …

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Evaluation Of Government Interventions In Ghana's Forest Product Trade: A Post-Intervention Impact Assessment And Perceptions Of Marketing Implications, Ben Nathan Donkor Jan 2003

Evaluation Of Government Interventions In Ghana's Forest Product Trade: A Post-Intervention Impact Assessment And Perceptions Of Marketing Implications, Ben Nathan Donkor

LSU Doctoral Dissertations

Since the mid 1990s Ghana's forestry sector has been going through reforms geared towards achieving the ITTO Year 2000 Objective for sustainable forest management and forest product trade. The reforms were partly introduced through legal approaches and also through activities under a long-term Forestry Sector Development Master Plan. The legal approaches mainly dealt with strengthening of sector institutions to effectively carry out forest concession administration and management, stumpage fee increases and more punitive actions against forest offences. Reforms with more direct impact on forest product export trade came through the implementation of the Forestry Sector Development Master Plan - reduction …

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Global Expression Analysis Of Deinococcus Radiodurans' Response To Ionizing Radiation: Irre Is A Novel Regulator Of This Response, Ashlee M. Earl Jan 2003

Global Expression Analysis Of Deinococcus Radiodurans' Response To Ionizing Radiation: Irre Is A Novel Regulator Of This Response, Ashlee M. Earl

LSU Doctoral Dissertations

IRS24 is a strain of Deinococcus radiodurans carrying mutations in two loci, uvrA and irrE, rendering it sensitive to the lethal effects of UV and ionizing radiation. These sensitivities can be reversed by introducing the wild type irrE allele back into IRS24 via natural transformation. The irrE allele was localized to a 970bp region of D. radiodurans R1 Chromosome I containing one putative open reading frame, DR0167, and 179bp of upstream sequence. Subsequent sequence analysis of the irrE allele in IRS24 revealed a transition mutation at codon 111 of DR0167 (IrrE) resulting in an arginine to cysteine amino acid substitution. …

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Black Willow (Salix Nigra) Use In Phytoremediation Techniques To Remove The Herbicide Bentazon From Shallow Groundwater, Robert Mark Conger Jan 2003

Black Willow (Salix Nigra) Use In Phytoremediation Techniques To Remove The Herbicide Bentazon From Shallow Groundwater, Robert Mark Conger

LSU Doctoral Dissertations

Wetland environments have been impacted by the activities of man over the past several hundred years in North America. Industrialization into wetland areas has brought with it anthropogenic compounds that have been released into soils and groundwater. The use of phytoremediation to detoxify soil and groundwater began in the mid 1990's and has become a popular remediation technology. In 1994, a feasibility study for using phytoremediation in such an industrialized wetland area was conducted at a petrochemical facility at BASF Corporation, located about 20 kilometers south of Baton Rouge, Louisiana in Ascension Parish. The test site consisted of low level …

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Optimization Of The Light Dynamics In The Hydraulically Integrated Serial Turbidostat Algal Reactor (Histar), Barbara Christine Benson Jan 2003

Optimization Of The Light Dynamics In The Hydraulically Integrated Serial Turbidostat Algal Reactor (Histar), Barbara Christine Benson

LSU Doctoral Dissertations

The research objective was the optimization of light dynamics in a Hydraulically Integrated Serial Turbidostat Algal Reactor (HISTAR). A deterministic model of HISTAR productivity that was responsive to manipulations of photosynthetic photon flux fluence rate (PPFFR) was developed, calibrated, and applied. A series of experiments was conducted to define the mathematical equations that best describe three relationships. The first relationship was between the elevation (E) of the light source and the culture surface PPFFR (Io). The second relationship was between the biomass concentration (X) in the experimental unit and the average PPFFR in the reactor (Ia). …

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Synthesis, Characterization, And Application Of Water-Soluble Chiral Calix[4]Arene Derivatives In Spectroscopy And Capillary Electrokinetic Chromatography, Kim Hamilton Jan 2003

Synthesis, Characterization, And Application Of Water-Soluble Chiral Calix[4]Arene Derivatives In Spectroscopy And Capillary Electrokinetic Chromatography, Kim Hamilton

LSU Doctoral Dissertations

This dissertation is an account of the synthesis, characterization, and application of novel water-soluble chiral calixarenes in spectroscopy and capillary electrophoresis. It is divided into four sections. The first part describes the synthesis and nuclear magnetic resonance (NMR) characterization of four p-t-butylcalix[4]arenes bearing L-amino acid moieties on their lower rims (CX4-AA). The structure and conformation of the derivatives have been determined using one- and two-dimensional NMR techniques. Proton and carbon-13 spectra show that the derivatives are tetra-substituted and adopt a cone conformation. The preparation and characterization of silica-bonded calixarene stationary phases for capillary electrochromatography is also reported in Chapter 2. …

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Program Participants' Knowledge And Perceptions Of Effectiveness Of The French Quarter Formosan Termite Program, Alan L. Morgan Jan 2003

Program Participants' Knowledge And Perceptions Of Effectiveness Of The French Quarter Formosan Termite Program, Alan L. Morgan

LSU Doctoral Dissertations

The purpose of this study was to determine program participants’ knowledge and perceptions of the effectiveness of the French Quarter Formosan Termite Program. The management of the Formosan subterranean termite is critical to the economic well-being of not only Louisiana, but the U.S. Estimates of property damage, repairs, and control measures exceed $1 billion per year in the U.S., of which $500 million is in Louisiana and $300 million is in the New Orleans area. In 1998, the LSU Agricultural Center, a statewide agricultural research and extension campus of Louisiana State University, in cooperation with the Agricultural Research Service, began …

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