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LSU Historical Dissertations and Theses

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Nonlinear Inelastic Finite Element Analysis Of Reinforced Concrete Structures With Emphasis On Shear And Torsion. (Volumes I And Ii)., Ananth Ramaswamy Jan 1992

Nonlinear Inelastic Finite Element Analysis Of Reinforced Concrete Structures With Emphasis On Shear And Torsion. (Volumes I And Ii)., Ananth Ramaswamy

LSU Historical Dissertations and Theses

In this study a post-cracking formulation for the analysis of reinforced concrete structures has been proposed. The secant stiffness formulation considers the following nonlinearities: effects of tension-stiffening in concrete along the reinforcing direction(s), aggregate interlock model with variable shear based on crack confining stresses, and reduction of concrete compressive strength and stiffness after cracking as a function of stresses or strains. The cracking model is capable of simulating the effects of multiple non-orthogonal cracks at a point. This total stiffness formulation treats concrete unloading and reloading along a secant path and is capable of simulating the post-peak strain softening response. …

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Failure Predictions In Repairable Multi-Component Systems., Woodrow Thomas Roberts Jr Jan 1992

Failure Predictions In Repairable Multi-Component Systems., Woodrow Thomas Roberts Jr

LSU Historical Dissertations and Theses

The subject of this research is the prediction of failures in repairable multi-component systems from statistical models that utilize the historical failure data for the systems. Failures occurring in repairable systems are examples of a series of discrete events which occur randomly in a continuum. Such stochastic point processes are analyzed using the statistics of event series. The Crow nonhomogenous Poisson process, NHPP, model is recognized by the reliability community as being one of the best models for repairable systems. The objective of this research is to show that the Crow NHPP model, with its overall failure predictions for a …

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Normal And Pathological Breakdown In Arabic., Sabah Safi-Stagni Jan 1992

Normal And Pathological Breakdown In Arabic., Sabah Safi-Stagni

LSU Historical Dissertations and Theses

The grammatical structure of Arabic allows for significant cross-linguistic comparisons in the study of Slips-of-the-tongue as well as aphasia. The dissertation presents a case study of the aphasic deficit in the speech of a speaker of Arabic, in particular, the Hijazi dialect spoken in the Western Province of Saudi Arabia, with a subsequent comparison with regular slips-of-the-tongue in the same dialect collected and analyzed by the same author. Both the slips-of-the-tongue data and the aphasia data have been collected in the city of Jeddah, Saudi Arabia, by the present investigator. It was observed that in such a highly inflected language, …

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The Structure Of Cementitious Materials Produced By Alkali Activation Of Calcium Aluminosilicate Glasses., Paul Joseph Schilling Jan 1992

The Structure Of Cementitious Materials Produced By Alkali Activation Of Calcium Aluminosilicate Glasses., Paul Joseph Schilling

LSU Historical Dissertations and Theses

A comprehensive investigation, using scanning electron microscopy, energy dispersive x-ray analysis, x-ray diffraction, and $\sp{29}$Si and $\sp{27}$Al magic angle spinning nuclear magnetic resonance spectroscopy, was conducted on the NaOH-activated blastfurnace slag system. Integration of the results from these techniques accommodated characterization of the unreacted glass, identification of the crystalline hydration products, and presentation of a proposed structure for the C-S-H phase. Crystalline hydration products identified by x-ray diffraction were CSH(I) and (C,M)$\sb4$AH$\sb{\rm x}$, and the proposed structure for the C-S-H phase consists mainly of imperfect layers of tobermorite. The structures of the hydrated phases were found to be closely related …

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Shoot Growth And Form Of Senna Obtusifolia In Response To Soybean And Intraspecific Competition., James Edward Smith Jan 1992

Shoot Growth And Form Of Senna Obtusifolia In Response To Soybean And Intraspecific Competition., James Edward Smith

LSU Historical Dissertations and Theses

Effects of competition on growth and formation of shoot structure in sicklepod (Senna obtusifolia) were examined, with particular emphasis on the effect of nearest neighbors on branching and canopy formation. Sicklepod was established as (1) stands of 26 plants m$\sp{-2}$ added to soybean, (2) individuals widely enough spaced to produce only interspecific competition when added to soybean, or (3) regularly spaced monoculture stands with 15, 25, 35, and 50 cm interplant distances. Repeated surveys of individual shoots characterized sicklepod growth and shoot structure in terms of position of and growth at each node. Sicklepod leaf area, internode elongation, node production, …

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Structural, Immunological, And Functional Characterization Of Simian Immunodeficiency Virus Proteins., Mark Anton Miller Jan 1992

Structural, Immunological, And Functional Characterization Of Simian Immunodeficiency Virus Proteins., Mark Anton Miller

LSU Historical Dissertations and Theses

Biochemical, immunological, and structural characterizations of the structural proteins of simian immunodeficiency virus (SIV) were performed. Various electrophoretic and chromatographic analyses of native and metabolically radiolabeled virus preparations coupled with immunological procedures such as Western blotting and radioimmunoprecipitation were utilized to identify SIV/DeltaB670-encoded polypeptides. Two-dimensional tryptic peptide mapping of each putative viral protein was employed to confirm that each of these components were unique and not cleavage products of precursor polyproteins. Site-directed serological studies using synthetic peptides analogous to regions of the SU and TM protein predicted to have high antigenic potential were performed. These studies resulted in the identification …

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Distinctions Between Reefs And Bioherms Based On Studies Of Fossil Algae: Mizzia, Permian Capitan Reef Complex (Guadalupe Mountains, Texas And New Mexico) And Eugonophyllum, Pennsylvanian Holder Formation (Sacramento Mountains, New Mexico)., Brenda Kirkland George Jan 1992

Distinctions Between Reefs And Bioherms Based On Studies Of Fossil Algae: Mizzia, Permian Capitan Reef Complex (Guadalupe Mountains, Texas And New Mexico) And Eugonophyllum, Pennsylvanian Holder Formation (Sacramento Mountains, New Mexico)., Brenda Kirkland George

LSU Historical Dissertations and Theses

The udoteacean alga Eugonophyllum is well-preserved in the Virgilian Holder Formation, Sacramento Mountains. Original aragonite occurs as a felt-like mesh of needles in algal thalli, mollusc fragments, sponge walls, botryoidal, and isopachous marine cements. In the basal, heavily calcified portion of Eugonophyllum the interior of the thallus is composed of aragonitic felt punctuated by 20 $\mu$m diameter, parallel siphons. In the distal, less calcified portion of the thallus, irregularly arranged siphons are larger. This study substantiates suggested similarities between Pennsylvanian/Permian phylloid algal mounds and Holocene Halimeda mounds. The Permian dasyclad Mizzia is important for paleoecological study in the Guadalupe Mountains, …

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Development Of Various Quantitative And Analytical Methods For The Analysis Of The Dynamics Of Fish Populations: An Application To The Spotted Seatrout Population In Coastal Louisiana., Thomas Earl Helser Jan 1992

Development Of Various Quantitative And Analytical Methods For The Analysis Of The Dynamics Of Fish Populations: An Application To The Spotted Seatrout Population In Coastal Louisiana., Thomas Earl Helser

LSU Historical Dissertations and Theses

Presented in this dissertation are analytical and quantitative methods developed for an experimental gillnet sampling program for the analysis of the dynamics of fish populations, illustrated here on Louisiana's spotted seatrout population. Chapter 1 presents a new method of estimating gillnet selectivity using a system of simultaneous equations and a non-linear iterative maximum likelihood approach. The model solution is a set of parameter estimates which mathematically describe the response surface of capture probabilities for fish of size-class j in mesh size i. As an extension to the nonlinear maximum likelihood gillnet selectivity model, Chapter 2 presents a second approach using …

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Genetic And Systematic Study Of Viviparus Georgianus (Lea), A Freshwater Snail Species Complex., Masaya Katoh Jan 1992

Genetic And Systematic Study Of Viviparus Georgianus (Lea), A Freshwater Snail Species Complex., Masaya Katoh

LSU Historical Dissertations and Theses

Genetic and morphological variation were studied in a brooding (ovoviviparous) and morphologically variable freshwater snail (Viviparus georgianus (Lea)) in the southeastern United States. Eleven populations were clustered into three genetically isolated, allopatric species characterized by 7 to 15 diagnostic loci out of the 38 loci examined. These allopatric species were an eastern species (in eastern and southern Florida), a western species (in the Florida panhandle), and a central species in the Ochlockonee River. Nei's standard genetic distances between species were large (0.23-0.52) compared to within-species distances (0.00-0.06). Moreover, genetic distances between the Ochlockonee River species and other species were larger …

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Alternative Education And Social Change In Brazil: A History And Case Study., Maria De Lourdes Nunes Jan 1992

Alternative Education And Social Change In Brazil: A History And Case Study., Maria De Lourdes Nunes

LSU Historical Dissertations and Theses

In contrast to the elitism of the Brazilian formal education system are the efforts of educators at federal universities in promoting educational alternatives for the socioeconomically underprivileged population. Having reached its peak in the late 1950s and early 1960s and culminating with Paulo Freire's successful "conscientization" experiment in Angicos, educational alternatives were revitalized in the 1980s upon the nation's "return to democracy." Since then, Brazilian universities have committed themselves to contribute to the struggle for social transformation. Mission and objective statements of individual universities express their attitude towards active involvement in the process of alleviating educational and socioeconomic inequities which …

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Development Of A Technique To Determine The Temperature Dependence Of The Refractive Index Of Carbonaceous Particulates., Barry James Stagg Jan 1992

Development Of A Technique To Determine The Temperature Dependence Of The Refractive Index Of Carbonaceous Particulates., Barry James Stagg

LSU Historical Dissertations and Theses

The complex refractive index of carbonaceous particulates is an important quantity in many areas of combustion research and practical applications. This property characterizes the radiative transport in luminous flames and plays a key role in the interpretation of conventional light scattering measurements. The purpose of the present study is to develop a technique which will allow the experimental determination of the temperature dependence of the refractive indices of carbonaceous materials and provide a predictive model for the variation of the indices. A high temperature ellipsometer system is developed that allows measurements of the intensity of polarized light reflected from the …

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Phylogenetic Systematics Of The Ulvophyceae (Chlorophyta) Based On Cladistic Analyses Of Ribosomal Rna Genes And Morphology., Frederick William Zechman Jan 1992

Phylogenetic Systematics Of The Ulvophyceae (Chlorophyta) Based On Cladistic Analyses Of Ribosomal Rna Genes And Morphology., Frederick William Zechman

LSU Historical Dissertations and Theses

Cladistic analyses of non-molecular and nuclear-encoded rRNA sequence data provided the basis for hypotheses of relationships for the green algal class Ulvophyceae. Non-molecular data rooted with Chara support hypotheses which group the Chlorophyceae and Pleurastrophyceae with ulotrichalean and ulvalean Ulvophyceae. Analyses of rRNA sequence data group the siphonous and siphonocladous Ulvophyceae (i.e. Caulerpales, Siphonocladales, and Dasycladales) with the Chlorophyceae and Pleurastrophyceae. Although hypotheses supported by these independent data sets are incongruent, they suggest that the Ulvophyceae is not monophyletic. Based on rRNA sequences, pleurastrophycean taxa, which, like the Ulvophyceae, possess a counter-clockwise arrangement of flagellar basal bodies, are more closely …

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Effects Of Vertebrate Herbivory On Louisiana Coastal Marshes., Katherine Lynn Taylor Jan 1992

Effects Of Vertebrate Herbivory On Louisiana Coastal Marshes., Katherine Lynn Taylor

LSU Historical Dissertations and Theses

The disturbances of herbivory, simulated "eat-outs" (clipping and removal of above-ground biomass), and burning were examined for their effect on total biomass, individual species abundance, and species richness in several different marsh communities. Herbivory significantly reduced the total community biomass of all the marshes studied. Simulated "eat-outs" reduced the total biomass of the freshwater marsh but had no persistent effect on the total biomass of either the oligohaline or mesohaline marshes of the Pearl River. Both the oligohaline and the mesohaline marshes were able to recover from a removal of above-ground biomass (simulated "eat-out") within two years. The freshwater marsh …

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Interference, Management, And Growth Response Of Wild Poinsettia (Euphorbia Heterophylla L.) In Soybean., Teresa Summerford Willard Jan 1992

Interference, Management, And Growth Response Of Wild Poinsettia (Euphorbia Heterophylla L.) In Soybean., Teresa Summerford Willard

LSU Historical Dissertations and Theses

In field studies conducted in Louisiana in 1990 and 1991, area of influence, density, and duration of interference methodologies were used to evaluate wild poinsettia (Eupborbia heterophylla L.) interference in soybean (Glycine max (L.) Merr.). In 1990, soybean seed yield within 10 cm of wild poinsettia was similar to distances of 10 to 20 and 20 to 40 cm, but was less than that for distances greater than 40 cm from the weed. In contrast, soybean yields in 1991 growing within 10 cm of the weed were less than at greater distances. Weed interference resulted in a 9.4 and 18% …

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Characterization Of Gentamicin Resistance In Enteric Bacteria Isolated From Pseudomys Scripta-Elegans From Commercial Turtle Farms., Michelle Anne Brassett Jan 1992

Characterization Of Gentamicin Resistance In Enteric Bacteria Isolated From Pseudomys Scripta-Elegans From Commercial Turtle Farms., Michelle Anne Brassett

LSU Historical Dissertations and Theses

Several genera of aminoglycoside resistant enteric bacteria were isolated from commercial turtle farms. Citrobacter freundii and Proteus vulgaris were the most prevalent organisms. Gentamicin resistance, measured by minimum inhibitory concentrations (MIC), ranged as high as 100 $\mu$g/ml. While resistance to other antibiotics was detected in gentamicin-resistant isolates, no correlation was observed between antibiotic resistance and plasmid content. Spontaneous mutation to gentamicin could not account for the high levels of gentamicin resistance found in the original isolates. Regions of chromosomal DNA encoding gentamicin resistance of 100 $\mu$g/ml were obtained from two Citrobacter freundii, two Proteus vulgaris, and two Salmonella enteritidis strains. …

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Sorption, Kinetics, And Transport Of Selected Heavy Metals In Soil: A Laboratory Study And Modelling Approaches., Christoph Hinz Jan 1992

Sorption, Kinetics, And Transport Of Selected Heavy Metals In Soil: A Laboratory Study And Modelling Approaches., Christoph Hinz

LSU Historical Dissertations and Theses

The retention and transport behavior of heavy metals in soils is affected by soil chemical heterogeneity. The objectives of this study were to evaluate (i) the effects of heterogeneity on solute transport of heavy metals under steady water flow, (ii) the applicability of single solute and ion exchange isotherms to model Zn and Cd transport in soil columns, (iii) the modelling of the sorption kinetics of Zn under batch and flow conditions, and (iv) the effects of organic matter and iron oxide removal on the kinetics of Zn sorption in soils. A sensitivity analysis showed that site affinity distribution functions …

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Theatrical Intervention In The Aids Crisis: Performance, Politics, And Social Change., Cindy J. Kistenberg Jan 1992

Theatrical Intervention In The Aids Crisis: Performance, Politics, And Social Change., Cindy J. Kistenberg

LSU Historical Dissertations and Theses

This purpose of this study is to assess the efficacy of performance as a means of social change by focusing on performances that have arisen out of the AIDS crisis. Working from a cultural studies perspective, I attempt to delineate both the possibilities and limitations for this perspective on social change. By comparing the various forms these performances have taken, I offer an explanation as to how these forms inhibit or enhance the ability of a performance to challenge the dominant discourse on AIDS, and create and mobilize communities that can act in the fight against AIDS. I begin by …

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Autobiographical Amnesia: Memory, Myth, Curriculum., Gregory Michael Nixon Jan 1992

Autobiographical Amnesia: Memory, Myth, Curriculum., Gregory Michael Nixon

LSU Historical Dissertations and Theses

Autobiography in curriculum theory and practice is being more and more acknowledged as a major force leading toward the development of reflectively analytical teachers, reflexive practitioners, and discursively self-aware individuals. I look to two vital aspects of self-narration to explore. I speak firstly of memory, without which narrative continuity would be impossible. Memory is as involved with learning as it is with storytelling, and I would agree with Krell (1978) that "inquiry into memory and the theory of pedagogy go hand in hand" (p. 131). I eschew the models of memory provided by the behavioral sciences, empirical psychology, cognitive psychology, …

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John Donne's Verse Letters To Lucy Russell, Countess Of Bedford: Rhetorical Means To A Friendship., Joan Frances Faust Jan 1992

John Donne's Verse Letters To Lucy Russell, Countess Of Bedford: Rhetorical Means To A Friendship., Joan Frances Faust

LSU Historical Dissertations and Theses

John Donne's verse letters to Lucy Russell, Countess of Bedford, are more than static hyperbolic praise to a patroness interchangeable with any other patroness. Rather, they are viable and personal means by which Donne creates and sustains a friendship. Through the five verse letters examined in this dissertation, "Reason is the soules left hand," "You have refin'd mee," "T'Have written then," "To the Countesse of Bedford At New-yeares Tide," and "Honour is so sublime perfection," Donne rhetorically demonstrates his understanding of and ability to function within the various contexts of Bedford's life. Using the accepted view of the epistolary form …

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Comparative Study Of Anionic And Nonionic/Anionic Surfactant Systems In Micellar Electrokinetic Capillary Chromatography., Edward Lester Little Jan 1992

Comparative Study Of Anionic And Nonionic/Anionic Surfactant Systems In Micellar Electrokinetic Capillary Chromatography., Edward Lester Little

LSU Historical Dissertations and Theses

Micellar electrokinetic capillary chromatography (MECC) is a rapidly growing technique allowing separation of electrically neutral compounds with the high separation efficiencies typically observed in capillary zone electrophoresis. This technique is still in its infancy and subsequently suffers from several inherent problems which must be addressed such as the limited range of solute elution and clear protocol for optimization of separations. This work addresses these problems with primary emphasis on using mixed nonionic/anionic surfactant systems as opposed to pure surfactants. In Chapter One, the fundamental theory behind MECC is discussed along with a brief synopsis of previous studies involving different surfactant …

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Further Psychometric Properties Of The Mother's Activity Checklist., Linda Merideth Little Jan 1992

Further Psychometric Properties Of The Mother's Activity Checklist., Linda Merideth Little

LSU Historical Dissertations and Theses

The present study attempted to extend the results obtained by Kelley and Carper (1988) regarding the psychometric properties of the Mother's Activity Checklist utilizing a larger, more heterogeneous sample of mothers. The MAC is a 100-item checklist of pleasant and unpleasant setting events which mothers frequently experience. A revised version of the MAC consisting of 45 items was developed utilizing factor analysis procedures. The revised version consists of four factors: Pleasant Events, Unpleasant Events, Aversive Child Behavior, and Aversive Marital Events. Utilizing a sample of eight hundred and thirty-three mothers with children between the ages of 2 and 12, both …

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Internal Labor Markets: Labor Process And Market Power Effects., Rebecca Grace Long Jan 1992

Internal Labor Markets: Labor Process And Market Power Effects., Rebecca Grace Long

LSU Historical Dissertations and Theses

This study contends that previous investigations into the nature of internal labor markets have been hampered by their dependence on various macro-level variables (e.g., sectors, industries, strategies) that ignore the often wide variation of employment arrangements within individual firms. It proposes that a better understanding of the employment arrangements associated with individual jobs may be gained by not only examining a job's technological components, but also the relative power of a firm's various coalitions. The data used in the reported study were acquired from the headquarters of the U.S. Bureau of Employment and Training's Occupational Field Analysis Centers in Raleigh, …

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Applicability Of Bioluminescence Assay And Aerobic Bacterial Counts For The Evaluation Of Raw Milk Quality., Abdul Ghafoor Mian Jan 1992

Applicability Of Bioluminescence Assay And Aerobic Bacterial Counts For The Evaluation Of Raw Milk Quality., Abdul Ghafoor Mian

LSU Historical Dissertations and Theses

Raw milk samples were analyzed to determine the bacteriological quality by the standard plate count (SPC), adenosine-5$\sp\prime$-triphosphate (ATP) assay, preliminary incubation counts, and the psychrotrophic bacteria count (PBC). In a comparison of SPC and ATP content, an overall correlation coefficient of 0.97 was found between the two methods. The correlations between ATP content and SPC of fresh raw milk samples at zero hour and after preliminary incubating these samples at 12.8 and 15.6$\sp\circ$C for 18 hours were.96,.97, and.97, respectively. The regression coefficients for all types of milk samples were highly significant ($P <$.01). High correlation coefficients demonstrated that the ATP measurement in combination with preliminary incubation practices could be a rapid technique for the determination of bacteriological quality of milk at receiving stations and milk processing plants. Median SPC for 175 fresh raw milk samples was 36,000/ml. The bioluminescence technique is reported previously to have a good correlation with SPC in the range of 1.0 $\times$ 10$\sp5$ to 1.0 $\times$ 10$\sp{10}$ bacteria/ml. The commingled milk coming at the receiving stations sometimes have a bacterial count that is less than 1.0 $\times$ 10$\sp{5}$ bacteria/ml. A correlation coefficient of.87 was calculated between the SPC and ATP values for the overall data while lowering the SPC range from 1.0 $\times$ 10$\sp5$ to 1.0 $\times$ 10$\sp4$ bacteria/ml. This range is more practical as a quick screening of raw milk at dairy processing facilities since 81 percent of all raw milk samples fell in this range. An equation (SPC = $-$1642213 + 6751(ATP)) was developed from the combined experimental data which could estimate the SPC of raw milk samples using their ATP content. Another phase of the experiment was to ascertain if the Petrifilm$\sp{\rm TM}$ technique could be effectively used in place of agar method to estimate PBC. The correlation coefficient between the Petrifilm$\sp{\rm TM}$ and the agar plate method for both the fresh and preliminary incubated raw milk samples was.99. A high linearity of relationship shows that one method can be substituted with the other. However, the Petrifilm$\sp{\rm TM}$ technique took longer than the usual time of 25 h to develop red colonies at 21$\sp\circ$C because of the slow reduction of the dye reagent triphenyl tetrazolium chloride (TTC) at this temperature.

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The Use Of Goal Setting And Contingency Contracting For Improving Children's Homework Performance., Deborah Lynn Miller Jan 1992

The Use Of Goal Setting And Contingency Contracting For Improving Children's Homework Performance., Deborah Lynn Miller

LSU Historical Dissertations and Theses

Research suggests that homework has favorable effects on learning and student achievement. However, research directed at improving homework completion and accuracy has been limited in scope. The present study examined the effects of goal setting and contingency contracting on children's homework performance. Subjects were four parent-child dyads in which the child exhibited clinically significant homework problems. Dependent variables of primary interest included direct observation of children's on-task behavior, work accuracy, and Homework Problem Checklist scores (Anesko, Schoiock, Ramirez, & Levine, 1987). Using a combination of multiple baseline and withdrawal (ABAB) designs, goal setting and contingency contracting produced significant improvements in …

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Molecular Phylogenies And Biogeography Of Central American Birds., Shannon J. Hackett Jan 1992

Molecular Phylogenies And Biogeography Of Central American Birds., Shannon J. Hackett

LSU Historical Dissertations and Theses

This dissertation presents data on the biogeography and molecular systematics of seven independent lineages of birds; both allozyme and mitochondrial DNA (mtDNA) characters were used. The purpose of this study was to discover biogeographic patterns among endemic taxa distributed in the highlands and lowlands of southern Central America and sister taxa in either North or South America. Analyses of the genera Diglossa, Buarremon, Pselliophorus, and Pezopetes suggested a complex biogeographic pattern in the highlands of southern Central America; divergence of some highland lineages occurred relatively recently (during the Pleistocene), after the landbridge connection between Central and South America was completed, …

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Urea Transformations In Flooded Soil., Chawalit Hongprayoon Jan 1992

Urea Transformations In Flooded Soil., Chawalit Hongprayoon

LSU Historical Dissertations and Theses

Laboratory incubation studies were conducted to measure adsorption, movement, and transformations of urea and hydrolyzed ammoniacal N in flooded soil columns. Urea was added to the floodwater (750 mg N L$\sp{-1}$, equivalent to 150 kg N ha$\sp{-1}$) of Crowley silt loam soil columns and urea diffusion and urea hydrolysis were measured. Subsequent NH$\sb4\sp+$-N and NO$\sb3\sp-$-N distribution after urea application and hydrolysis were measured over a 30 d period under aerobic and anaerobic conditions. Effects of percolation rates (0, 1, and 2 cm d$\sp{-1}$), and the use of urease inhibitor, N-(n-butyl) thiophosphoric triamide (NBPT), on movement and transformations of urea in …

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Pistols And Politics: Planter And Plain Folk Relations In The Piney Woods South, The Florida Parishes Of Louisiana, 1810-1899. (Volumes I And Ii)., Samuel Claiborne Hyde Jr Jan 1992

Pistols And Politics: Planter And Plain Folk Relations In The Piney Woods South, The Florida Parishes Of Louisiana, 1810-1899. (Volumes I And Ii)., Samuel Claiborne Hyde Jr

LSU Historical Dissertations and Theses

The Florida parishes of Louisiana experienced a peculiar pattern of development. Following successive periods of English and Spanish domination and an armed insurrection resulting in the shortlived Republic of West Florida, the region stabilized under the control of delta parish planters. A fierce tradition of Jeffersonian republican values encouraged the plain folk to assert themselves politically during the 1830's and 1840's. Yet by employing a series of enemies common to southern whites, and by expanding their control over the means of access to market, the planters stifled the aspirations of the plain folk insuring white unity on the eve of …

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Regional Comparative Advantage And Inefficiency In Production: Methodological And Empirical Issues., Barun Kanti Kanjilal Jan 1992

Regional Comparative Advantage And Inefficiency In Production: Methodological And Empirical Issues., Barun Kanti Kanjilal

LSU Historical Dissertations and Theses

The general objective of this study was to provide a methodological framework for evaluating stochastic comparative advantage of a crop in a multi-region multi-crop framework and its link with inefficiency at the firm level. In the first stage, regional comparative advantage, defined in terms of relative profitability, was theoretically analyzed on the basis of a firm's behavior under uncertainty. The empirical application involved derivation of a comparative advantage index for major crops produced in different regions of Louisiana. The results revealed heterogenous survival potential of each crop across regions. Sugarcane was found to have comparative advantage over rice and soybeans …

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The Effects Of Exercise Stress On Equine Immune Function., Tammie Lee Keadle Jan 1992

The Effects Of Exercise Stress On Equine Immune Function., Tammie Lee Keadle

LSU Historical Dissertations and Theses

The physiologic demands of exercise constitute a form of stress which is accompanied by modulation of immune responses. However, numerous studies in many different model systems have failed to clearly define the effects of exercise on immunity. Furthermore, the role of the neuroendocrine system in exercise-induced immunomodulation has been largely unexplored. To address these issues, we evaluated the effect of acute exercise stress on 3 indices of immune function in horses, before and after completion of a 12 week treadmill-based physical conditioning program. In addition, we determined the effects of corticosteroids, catecholamines, beta endorphin, and adrenocorticotropic hormone on these same …

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A Novel Process For The Production Of Clinical Dextran., Doman Kim Jan 1992

A Novel Process For The Production Of Clinical Dextran., Doman Kim

LSU Historical Dissertations and Theses

A new process for the production of clinical (or controlled size) dextran was developed. This process is simpler, cheaper and more economical than traditional methods. It involves the use of a mixed culture fermentation with a dextranase producing strain (Lipomyces starkeyi ATCC 74054) and a dextransucrase producing strain (Leuconostoc mesenteroides ATCC 10830). The new process produced 84% (w/w) of theoretical yield clinical dextran with an average polydispersity between 1.2 and 1.5. The mechanism of clinical dextran formation is the competitive production of acceptors from newly formed dextran molecules by dextranase. The acceptors compete for the existing glucosyl portion of sucrose, …

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