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Boron -Uptake Mechanisms And Boron Nutrition Of Rice., Xiaohe Yu Jan 2000

Boron -Uptake Mechanisms And Boron Nutrition Of Rice., Xiaohe Yu

LSU Historical Dissertations and Theses

There are very few studies on B deficiency in rice (Oryza sativa L.). Reported critical values of B deficiency in rice are contradictory and mechanisms of B uptake by plant are not understood. Objectives of this study were to determine B effects on rice grown in hydroponics and soil; to determine critical values of B deficiency in rice tissues, hydroponic solution and soil; and to explore B-uptake mechanisms in both monocots (rice) and dicots (soybean (Glycine max L.)). Rice was grown to maturity in an acid Caddo silt loam at 0 and 1 kg B ha--1 in a greenhouse study, …

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Children's Identity Construction In A Multicultural Setting., Edith Taylor Richardson Powers Jan 2000

Children's Identity Construction In A Multicultural Setting., Edith Taylor Richardson Powers

LSU Historical Dissertations and Theses

The study of cultural identity has thus far been rather unidimensional, portraying a child as a member of a single cultural group that has a homogeneous culture. Over the past twenty-five years, much of the research on the relationship between culture and education has looked at children's educational processes through the lens of group membership. This study examined six children from different cultures as they constructed their own identities within the multicultural classroom environment over the period of a year. It was designed to examine how individual children take on cultural "ways" that are associated with other cultural groups and …

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Environmental Education Programming For The Louisiana Cooperative Extension Service., John William Branch Jan 2000

Environmental Education Programming For The Louisiana Cooperative Extension Service., John William Branch

LSU Historical Dissertations and Theses

Environmental education is a component of community-based education programs. Environmental education in the United States and in Louisiana was described (Objectives 1 and 2). Because of rapid changes in environmental science, and the responses of citizens to environmental topics, extension faculty need additional programming techniques and more process and strategic skills training. Programming techniques and skills training were reviewed (Objective 3). Extension has included representatives from key state and federal agencies with expertise in, and responsibility for, environmental topics on its environmental education advisory committees. The Delphi technique was utilized in this study, with agency representatives as panelists, to determine …

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Alcohol Abuse And Violent Crime: A Contemporary Examination And Comparison Of Adult Male And Female Violent And Nonviolent Criminal Offenders., Don Randall Haley Jan 2000

Alcohol Abuse And Violent Crime: A Contemporary Examination And Comparison Of Adult Male And Female Violent And Nonviolent Criminal Offenders., Don Randall Haley

LSU Historical Dissertations and Theses

The focus of this study was to investigate the relationship between violent criminal activity and alcohol abuse, and to further extend the knowledge about these phenomenon which currently appear in the literature. The association between these two variables has been asserted for many years, but few definitive correlations have been established using representative data. This study sought to determine if a statistical relationship exists between alcohol abuse rates of inmates serving time in Louisiana and their convictions for violent crimes. The research design used to investigate the relationship between alcohol abuse and violent criminal behavior was non-experimental and correlational. Interviews …

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The Relationship Of Daily Stress And Health In Adolescents: Development Of The Daily Stress Inventory For Adolescents (Dsi -A)., John Michael Huete Jan 2000

The Relationship Of Daily Stress And Health In Adolescents: Development Of The Daily Stress Inventory For Adolescents (Dsi -A)., John Michael Huete

LSU Historical Dissertations and Theses

Daily stress has been documented to play a significant role in symptom exacerbation of chronic illnesses in adults, such as coronary heart disease, asthma, diabetes, and chronic headaches. Mediating daily stress may be effective in not only decreasing problem symptoms in chronic illness, but also decreasing unnecessary and costly primary and tertiary health care services. While the effects of daily stress have been well researched and documented with adult populations, adolescent populations have been afforded only minimal research attention. Given that the period of adolescence is a time when persons are first experiencing the stresses of adult life, understanding the …

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The Role Of Major And Minor Stressors In Moderating The Transtheoretical Model Of Exercise Behavior Among Predominantly Low -Income Patients Attending Primary Care Clinics., Shawn Kahlil Jeffries Jan 2000

The Role Of Major And Minor Stressors In Moderating The Transtheoretical Model Of Exercise Behavior Among Predominantly Low -Income Patients Attending Primary Care Clinics., Shawn Kahlil Jeffries

LSU Historical Dissertations and Theses

A sedentary lifestyle is prevalent in the United States and is associated with poor health outcomes (Blair et al., 1989). While regular exercise has been shown to have numerous physical and mental health benefits, much of the population does not perform physical activity at a level necessary to achieve significant health benefits. Primary care settings have become increasingly targeted areas for physician-based exercise counseling. One popular theoretical model of exercise adoption is the transtheoretical model of exercise behavior (Prochaska & Marcus, 1994) which proposes that individuals progress through stages of exercise behavior. Researchers have explored constructs affecting movement through the …

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Biological And Molecular Properties Of Sweet Potato Leaf Curl Virus., Pongtharin Lotrakul Jan 2000

Biological And Molecular Properties Of Sweet Potato Leaf Curl Virus., Pongtharin Lotrakul

LSU Historical Dissertations and Theses

In 1994, a sweet potato sample showing leaf curl symptoms was collected from the field in Louisiana. When graft-inoculated, Ipomoea setosa reacted with mild upward leaf curling while I. aquatica reacted with a bright yellow mottle. The putative virus was transmitted by the sweet potato whitefly, Bemisia tabaci biotype B, and it was designated the United States isolate of Sweet potato leaf curl virus (SPLCV-US). Four independent Southern blot hybridizations using the DNA-A of different begomoviruses as probes confirmed the presence of begomovirus-like DNA in the infected plants. Fibrillar inclusions and granular aggregates of geminivirus-like particles were observed in the …

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Glucocorticoid Regulation Of The Leptin Receptor Signaling System In The Rat., Abram Madimabe Madiehe Jan 2000

Glucocorticoid Regulation Of The Leptin Receptor Signaling System In The Rat., Abram Madimabe Madiehe

LSU Historical Dissertations and Theses

Obesity, a recognized health problem, is associated with cardiovascular disease, diabetes and hypertension. Removal of adrenal steroids by adrenalectomy (ADX) slows the development of obesity. Leptin decreases food intake through effects initiated by activation of the JAK-STAT pathway. Defects in leptin signaling lead to obesity, which is associated with hyperleptinemia and leptin resistance. In chapter 4, leptin induces phosphoenolpyruvate carboxykinase (PEPCK) mRNA expression and increases glucose production in hepatocytes from lean but not obese Zucker rats. This suggests that hyperleptinemia in obesity causes hyperglycemia. In chapter 5, ADX decreased the levels of PEPCK mRNA, and increased leptin receptor mRNA expression …

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Cultural Adjustment Of Foreign Students In An Institution Of Higher Education., Bridget Oscar Udoh Jan 2000

Cultural Adjustment Of Foreign Students In An Institution Of Higher Education., Bridget Oscar Udoh

LSU Historical Dissertations and Theses

Foreign students frequently encounter problems in adjusting to their new social environment when studying at institutions of higher education. The purpose of this study was to describe the level of social difficulty experienced by foreign students from different regions of the world while studying in the United States. The target population for this study consisted of 748 undergraduate foreign students enrolled at Louisiana. State University (LSU) in the spring of 2000. The accessible population was all students enrolled in English as a Second Language (ESL). The sample consisted of the 178 undergraduate students enrolled in English 1004 and 1005 (ESL) …

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Kate Chopin's Contribution To Realism And Naturalism: Reconsiderations Of W. D. Howells, Maupassant, And Flaubert., Jean Ann Witherow Jan 2000

Kate Chopin's Contribution To Realism And Naturalism: Reconsiderations Of W. D. Howells, Maupassant, And Flaubert., Jean Ann Witherow

LSU Historical Dissertations and Theses

No one has previously undertaken a detailed examination of Kate Chopin's documented intertextuality with writers such as W. D. Howells, Hamlin Garland, Maupassant, and Flaubert. My purpose is to examine Chopin's works in the context of writers with whom she interacts and so to reveal her impact on the development of literary realism and naturalism. My study reveals that, though her mature writing eliminates sentimentalism, she never abandons romance elements residual from her youth. Her typically subjective narrator removes narrative authority, intensifies our involvement with characters, and validates the marginalized voice. Darwin and the philosophers temper her Catholicism, yet she …

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Molecular Systematics Of The Green Algal Order Trentepohliales (Chlorophyta)., Juan Manuel Lopez-Bautista Jan 2000

Molecular Systematics Of The Green Algal Order Trentepohliales (Chlorophyta)., Juan Manuel Lopez-Bautista

LSU Historical Dissertations and Theses

Molecular, karyological, and nuclear genome quantification data from representatives of the order Trentepohliales (Chlorophyta) were used to infer evolutionary relationships with other green algal classes and orders. Phylogenetic analyses of the nuclear-encoded small subunit ribosomal DNA (18S rDNA) sequences from taxa representing all of the major lineages of green algae consistently indicated that the subaerial Trentepohliales are closely related to Ulvophycean marine green algae, particularly to the siphonous and hemisiphonous orders. The phylogenetic distribution of continuous and discontinuous types of mitochondrial large subunit ribosomal RNAs (mtLSU rRNA) in green algae has been shown to be consistent with phylogenetic relationships previously …

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Isolation And Characterization Of Newly Emerging Coronaviruses In Acute Respiratory Tract Diseases Of Cattle., Xiaoqing Lin Jan 2000

Isolation And Characterization Of Newly Emerging Coronaviruses In Acute Respiratory Tract Diseases Of Cattle., Xiaoqing Lin

LSU Historical Dissertations and Theses

A total of 411 G clone cell-dependent virus strains recently were isolated from nasal, trachea and lung samples in etiological investigations of acute respiratory tract diseases of vaccinated cattle, including shipping fever pneumonia. The virus infectivity titers reached up to 1.2 x 10 7 plaque forming units per gram of lung tissues of fatal cases. These viral agents were isolated in the 1st G clone cell passage without trypsin enhancement, and induced cell fusion. They have a restricted hemagglutination pattern, agglutinating only rat and mouse erythrocytes. Majority of them has receptor-destroying enzyme activities. They are round and enveloped with a …

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Rights Of Passage: A Cross -Cultural Study Of Maroon Novels By Black Women., Randi Gray Kristensen Jan 2000

Rights Of Passage: A Cross -Cultural Study Of Maroon Novels By Black Women., Randi Gray Kristensen

LSU Historical Dissertations and Theses

This study investigates the use and implications of the trope of marronage, the African-American practice of self-emancipation to forge alternative New World communities, in selected novels by Black women writers of North America and the Anglophone and Francophone Caribbean. It draws on theories of liminality to posit a theory of liberatory practice that deconstructs hegemonic narratives, both personal and historical. Postmodern approaches are deferred in favor of locating these texts and their concerns as deriving from the epistemological consequences of modernity. Cross-cultural Black women's texts were chosen to illuminate the recognition of shared subjugations across national and linguistic borders, as …

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Bioanalytical Applications In The Near -Infrared Region Using Fluorescent Covalent And Non-Covalent Probes With Near-Infrared Fluorescence Detection., Clyde Vernon Owens Jr Jan 2000

Bioanalytical Applications In The Near -Infrared Region Using Fluorescent Covalent And Non-Covalent Probes With Near-Infrared Fluorescence Detection., Clyde Vernon Owens Jr

LSU Historical Dissertations and Theses

The research presented in this dissertation entails the preparation, characterization, and analytical application of a series of novel tricarbocyanine, phthalocyanine, and napthalocyanine dyes which can be used as fluorescent probes for bioanalytical assays. The first part of this research focuses on the synthesis of a nuclear staining tricarbocyanine dye used for low-level detection of DNA restriction fragments separated via capillary electrophoresis. The second part focuses on the synthetic, purification, and applications of several tricarbocyanine, phthalocyanine, and naphthalocyanine dyes. The tricarbocyanine dyes were synthesized to contain a heavy atom-modification to enhance k isc through spin-orbit coupling and a reactive functional group …

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Half -Cycle Pulse Ionization Of Diamagnetic Zeeman States In Rydberg Atoms., Chitra Rangan Jan 2000

Half -Cycle Pulse Ionization Of Diamagnetic Zeeman States In Rydberg Atoms., Chitra Rangan

LSU Historical Dissertations and Theses

We study the dynamics of highly excited (Rydberg) atoms in laboratory-scale magnetic fields via their ionization by THz half-cycle pulses (HCPs). A half-cycle pulse is a unipolar electromagnetic pulse that can probe an atomic electron at all points along its orbit around the atomic core. The dynamical evolution of diamagnetic Zeeman states subjected to an ultrashort (picosecond) HCP is calculated for both hydrogen and sodium atoms. Diamagnetic Zeeman states are localized parallel and perpendicular to the magnetic field. We use a grid-based pseudo-potential method to determine these eigenstates of the combined Coulomb-diamagnetic potential. We study states with principal quantum number …

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Suspended Sediment And Nutrient Flux Dynamics In Fourleague Bay, Louisiana: The Role Of Winter Cold Fronts And Atchafalaya River Discharge., Brian Christopher Perez Jan 2000

Suspended Sediment And Nutrient Flux Dynamics In Fourleague Bay, Louisiana: The Role Of Winter Cold Fronts And Atchafalaya River Discharge., Brian Christopher Perez

LSU Historical Dissertations and Theses

Material concentrations and fluxes in Oyster Bayou, a tidal channel connecting Fourleague Bay, Louisiana and the northern Gulf of Mexico, were sampled every three hours for 3-months, to examine the importance of atmospheric cold fronts and riverine forcing on the functioning of this estuarine system. The Atchafalaya River was the primary source of nitrate+nitrite (NO2+NO3), total nitrogen (TN), and total phosphorus (TP) to the estuary with greater influence associated with northerly post-frontal winds. Riverine influence coupled with wind-forced resuspension events led to the greatest concentrations of total suspended sediment (TSS) and particulate organic carbon (POC). Ammonium (NH4) concentrations were highly …

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Ice -Core Pollen Studies From The Dunde And Guliya Ice Caps, Qinghai -Tibetan Plateau, China., Zuju Yao Jan 2000

Ice -Core Pollen Studies From The Dunde And Guliya Ice Caps, Qinghai -Tibetan Plateau, China., Zuju Yao

LSU Historical Dissertations and Theses

This research provides the first systematic and high-resolution ice-core pollen records from two ice caps in the northern Qinghai-Tibetan Plateau. To facilitate the climatic interpretation of the pollen data from the ice cores, a 30-year pollen record from the Dunde ice core is used to establish the quantitative relationship between pollen and modern climatic parameters. A 2000-year pollen record from the Dunde ice core reveals decadal and century time scale climatic changes. Three dry periods (i.e. A.D. 280--640, 1200--1370, and 1926--1986) and three wet periods are identifiable at Dunde. These results are compatible with other proxy data such as historical …

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Effects Of Dietary L -Carnitine On Female Retired Breeder Rats Fed High Protein And High Fat., Erika Maria Zablah-Bendeck Jan 2000

Effects Of Dietary L -Carnitine On Female Retired Breeder Rats Fed High Protein And High Fat., Erika Maria Zablah-Bendeck

LSU Historical Dissertations and Theses

Carnitine supplementation has been shown to protect animals from ammonia toxicity following an ammonium acetate infusion and to alter body composition (i.e. increase lean mass and decrease body fat) in younger animals. The aims of this study were to address the questions of whether: (1) carnitine lowers blood ammonia levels of rats fed high protein; (2) carnitine decreases the weight gain and body fat of older animals fed high fat; (3) carnitine decreases glucose-induced insulin secretion; and (4) consumption of a high fat diet increases total serum carnitine content. Sprague Dawley retired female breeder rats (n = 64) were stratified …

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The Impact Of Human Resource Expenditures And The Minimum Foundation Program's Level 3 Subsidy On Academic Productivity In Louisiana., John Paul Beaudoin Jan 2000

The Impact Of Human Resource Expenditures And The Minimum Foundation Program's Level 3 Subsidy On Academic Productivity In Louisiana., John Paul Beaudoin

LSU Historical Dissertations and Theses

This study investigated the impact of instructional salaries with and without a state-sponsored, supply-side subsidy on the academic productivity of schools in Louisiana. The subsidy under investigation was the Level 3 allocation for instructional salaries outlined in Louisiana's Minimum Foundation Program (MFP) that provides fiscal support for educational costs to local school boards. An educational production function model within the general systems framework outlined by Rossmiller and Geske (1977) was used in this study. All selected variables were aggregated to the school-level, which served as the unit of analysis for the study. The study's final sample (n = 296) approximated …

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Evaluation Of Heterologous Promoter Function In The Eastern Oyster (Crassostrea Virginica)., Ta Philip Chih Cheng Jan 2000

Evaluation Of Heterologous Promoter Function In The Eastern Oyster (Crassostrea Virginica)., Ta Philip Chih Cheng

LSU Historical Dissertations and Theses

The goal of this work was to evaluate the feasibility of using antimicrobial peptide gene transfer to enhance oyster immunity. The specific objectives were to: (1) compare the efficiency of collagenase, pronase, and trypsin to dissociate atrium, ventricle and mantle into individual cells for the initiation of primary cell culture; (2) develop cryopreservation conditions to preserve the dissociated cells; (3) establish a serum-free transfection system; (4) evaluate inducible promoter function using the established serum-free transfection system; (5) evaluate the effects of the transfer of antimicrobial peptide genes on oyster immunity. Pronase was found to be the most effective enzyme for …

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Effects Of Cobalt-60 Gamma Irradiation On The Malaysian Prawn Macrobrachium Rosenbergii., Nyanti Lee Jan 2000

Effects Of Cobalt-60 Gamma Irradiation On The Malaysian Prawn Macrobrachium Rosenbergii., Nyanti Lee

LSU Historical Dissertations and Theses

A major obstacle in culture of the Malaysian prawn, Macrobrachium rosenbergii, is the complex social structure whereby a few large males dominate the population and reduce production. The goal of this work was to induce reproductive sterility by use of gamma radiation as a means to increase production. Of the 62 publications related to the use of gamma radiation in aquatic species published between 1938 and 1996, 66% did not indicate performance of dosimetry (dosage verification). Samples were not rotated during irradiation in 98% of these studies, which introduces considerable variation in dose. A dosimetric study in this dissertation found …

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Ecological Models For Assessing Functions Of Hard Claypan Vernal Pool Wetlands In The Central Valley Of California Using The Hydrogeomorphic (Hgm) Approach For Wetland Assessment., Ellis Joseph Clairain Jr Jan 2000

Ecological Models For Assessing Functions Of Hard Claypan Vernal Pool Wetlands In The Central Valley Of California Using The Hydrogeomorphic (Hgm) Approach For Wetland Assessment., Ellis Joseph Clairain Jr

LSU Historical Dissertations and Theses

Seven vernal pool complexes consisting of numerous shallow wetland depressions were sampled in Sacramento County, California, during the spring and early summer of 1998. Data were obtained to characterize ecological conditions within each complex and to develop models for assessing wetland disturbance and functions. Degree of disturbance, topographic features, soil profiles, and plant species composition and percent cover were examined. Pool area, volume, perimeter, maximum depth, distance from pool to pool, and percent of sample area were computed for 265 vernal pools. Additional detailed topographic and vegetative data were obtained at 68 vernal pools and soil profiles characterized at 64 …

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A Cross-Sectional Study Of Prevalence And Risk Factors For Major Goat Diseases In Eastern And Western Uganda: Results And Exploration Of Biases., Edmond Kato Kabagambe Jan 2000

A Cross-Sectional Study Of Prevalence And Risk Factors For Major Goat Diseases In Eastern And Western Uganda: Results And Exploration Of Biases., Edmond Kato Kabagambe

LSU Historical Dissertations and Theses

In 1998 a cross-sectional study on goat health and management was conducted in eastern and western Uganda. This study involved 1518 goats which were distributed in 145 herds in 5 districts, namely Kumi, Masaka, Mbarara, Soroti and Ssembabule. Cluster sampling was used to select farms across the two regions. A questionnaire on goat health, management and constraints to production was administered to 145 goat owners. Blood and nasal swabs were collected from a random sample of goats. For each goat a physical examination was performed to detect presence of clinical conditions. Serological assays for contagious caprine pleuropneumonia (CCPP), peste des …

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Habitat And Demography Of Understory Trees In Mixed Species Hardwood Forests In Northern Florida, United States Of America., Charles Kwit Jan 2000

Habitat And Demography Of Understory Trees In Mixed Species Hardwood Forests In Northern Florida, United States Of America., Charles Kwit

LSU Historical Dissertations and Theses

Temperate mixed-species hardwood forests of northern Florida, USA, contain a high diversity of understory tree species, some of which have been hypothesized to require disturbance (e.g., hurricanes and/or treefall gaps). Taxus floridana is a rare understory conifer endemic to midslopes of ravines of the Apalachicola River Bluffs, and is found primarily on north-facing slopes. Vegetation sampling in the southern portion of T. floridana's range revealed the presence of an upslope oak-hickory community of suggested recent origin, and higher densities of American beech (Fagus grandifolia ), southern magnolia (Magnolia grandiflora), and evergreen understory trees on north-facing midslopes with T. floridana than …

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Modeling Escherichia Coli Concentration In Surface Runoff: The Ecoli Model., Teck Yee Ling Jan 2000

Modeling Escherichia Coli Concentration In Surface Runoff: The Ecoli Model., Teck Yee Ling

LSU Historical Dissertations and Theses

A biological model, ECOLI, is developed that is capable of continuously simulating E. coli concentration in surface runoff from agricultural land applied with manure. The model was calibrated and validated by using data from field-scale studies at Franklinton, Louisiana. During validation the model was interfaced with GLEAMS-SWT model to obtain the necessary hydrologic and erosion variables as input to the ECOLI model. The ECOLI model was found to perform best when simulating runoff concentration following the first application of waste. For reapplication of waste within 50 days, the trend of decrease over time was well-simulated but simulated E. coli concentrations …

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State-Resolved Molecular Photoionization Dynamics Of Polyatomic Systems: Effects Of Non-Linear Changes In Molecular Geometry., James Scott Miller Jan 2000

State-Resolved Molecular Photoionization Dynamics Of Polyatomic Systems: Effects Of Non-Linear Changes In Molecular Geometry., James Scott Miller

LSU Historical Dissertations and Theses

An important topic in the absorption of vacuum ultraviolet photons by molecules is the correlation between electronic and nuclear degrees of freedom during photoionization. However, no previous investigations have probed the correlation between bending excitation and photoejection dynamics over a wide spectral range. We present the first such studies by reporting the influence of bending excitation following CO2 3sigmau --1 and N2O 7sigma--1 photoionization over the photon energy range (15 eV < hvexc < 200 eV). Using dispersed fluorescence spectroscopy in conjunction with synchrotron radiation, we determine the vibrational branching ratio v+ = 0,1,0 0,0,0 for the CO2+ (B 2Sigmau+) and N2O+ (A 2Sigma+) electronic states. The relative rate of production of the upsilon2 = 1 upper vibrational state varies over a broad ionization energy range, and in ways that are largely unanticipated. These branching ratios exhibit a strong thermal dependence, and we are able to separate out effects due to hot-band excitation from those that are due to vibronic coupling. The data indicate that the continuum electron is responsible for the observed energy dependence in CO2 3sigma u--1 photoionization. This is a previously unobserved result. Additional studies examine the influence of simultaneous excitation in the bending and symmetric stretching modes in N2O+ [A 2Sigma+, v + = (1,1,0)] to determine the effect of changing the energy separation of vibronically coupled potential surfaces. Finally, the CF4 + [D 2A1, v+ = (1,0,0,0)/(0,0,0,0)] branching ratio is studied, which provides the first experimental observation of a predicted low-energy shape resonance in this photoionization pathway.

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Visual And Semiochemical Disruption Of Host Finding In Pine Bark Beetles., Brian Lee Strom Jan 2000

Visual And Semiochemical Disruption Of Host Finding In Pine Bark Beetles., Brian Lee Strom

LSU Historical Dissertations and Theses

Pine bark beetles (Coleoptera: Scolytidae) affect ecological and anthropocentric processes in coniferous forests. Certain aggressive species, particularly among the Dendroctonus, cause widespread damage. As forests become increasingly valued for diverse commodities, protection strategies must be developed to meet a wide variety of landowner values. Disruption of the host selection process is one important strategy for managing pine bark beetles. The objectives of this work were: to describe the oleoresin flow and constituency of loblolly pines (Pinus taeda) whose parents escaped mass attack by the southern pine beetle, Dendroctonus frontalis (SPB); to ascertain the utility of altering visual silhouettes to disrupt …

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The Design And Construction Of Novel Near -Infrared Time -Correlated Single Photon Counting Devices For The Identification Of Analytes In Multiplexed Applications., Emanuel Austin Waddell Jr Jan 2000

The Design And Construction Of Novel Near -Infrared Time -Correlated Single Photon Counting Devices For The Identification Of Analytes In Multiplexed Applications., Emanuel Austin Waddell Jr

LSU Historical Dissertations and Theses

This manuscript details the design, construction, and application of novel near infrared time correlated single photon counting devices to the identification of analytes in analytical separations. The thrust of this research is to provide a simple, low cost technique for the high-speed identification of DNA sequencing bases that are labeled with a series of unique near infrared fluorophores. These fluorophores are unique because they possess the same emission and absorption maxima, but different fluorescence lifetimes. Consequently, they allow analytes to be discriminated by fluorescence lifetime as opposed to color. The first goal of this dissertation research was to implement a …

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Studies In Organized Media: Part I. Characterization And Use Of Polymeric Chiral Surfactants As Pseudo-Stationary Phases For Separation In Capillary Electrophoresis. Part Ii. Use Of Cyclodextrins In Capillary Electrophoresis And In The Formation Of Linear Aggregates., Houphouet Hyacinthe Yarabe Jan 2000

Studies In Organized Media: Part I. Characterization And Use Of Polymeric Chiral Surfactants As Pseudo-Stationary Phases For Separation In Capillary Electrophoresis. Part Ii. Use Of Cyclodextrins In Capillary Electrophoresis And In The Formation Of Linear Aggregates., Houphouet Hyacinthe Yarabe

LSU Historical Dissertations and Theses

This research involves the synthesis and characterization of charged chiral polymeric surfactants for their use as pseudostationary phases in electrokinetic chromatography (EKC). Poly sodium N-undecanoyl L-valinate (poly L-SUV), poly sodium N-undecanoyl L-threoninate (poly L-SUT), and poly sodium N-undecanoyl L-isoleucinate (poly L-SUIL) were synthesized in this study. The partial specific volumes of these polymers, determined using a densitometer, were 0.81, 0.77, and 0.83 mL/g, respectively. Molecular weights of 9,984, 11,252 and 10,563 were obtained for poly L-SUV, poly L-SUT and poly L-SUIL, respectively by using sedimentation equilibrium. In addition, sedimentation coefficients of 0.67 and 1.03 S were found for poly L-SUV …

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Diversity And Spatial Analysis Of Passerine Birds In Relation To Habitat Characteristics Of Woods Along The Northern Coast Of The Gulf Of Mexico., Jose Luis Alcantara Jan 2000

Diversity And Spatial Analysis Of Passerine Birds In Relation To Habitat Characteristics Of Woods Along The Northern Coast Of The Gulf Of Mexico., Jose Luis Alcantara

LSU Historical Dissertations and Theses

I studied the ecological diversity and spatial patterns of passerine birds during the springs of 1993, 1994, and 1995 at 3 stopover sites on the Chenier Plains of Louisiana and Texas. A "control" stand with dense understory vegetation and a "reduced" stand with modified understory were at each site. Data were collected on the structure and composition of vegetation and on the abundance and location of birds. Species richness, dominance, and diversity indices were computed for both vegetation and birds. Patterns of floristic impoverishment, greater dominance, and greater plant species diversity were found at the "reduced" stands. "Control" vegetation did …

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