Digital Commons Network^™

Effects Of Propiconazole On Morphology, Development, And Epidemiology Of Rhizoctonia Solani, Causal Agent Of Rice Sheath Blight., Elly M. Van Eeckhout

LSU Historical Dissertations and Theses

Propiconazole was inhibitory to mycelial growth of Rhizoctonia solani in vitro. Sclerotial weight per colony was also reduced by propiconazole treatment but, in relation to total amount of mycelium, sclerotia formed earlier in 1 to 10 $\mu$g/ml plates than in control plates. Colony diameters from germinating sclerotia obtained from cultures growing at 0.5 to 10 $\mu$g/ml, were significantly greater than those of control colonies. Prolonged inhibitor activity resulted in increased branching, swollen or strongly tapered hyphal tips, formation of 'beaded' hyphae, and rupturing of hyphal walls when intrahyphal hyphae emerged. Abnormal fluorescent patches, representative of abnormal cell wall deposition, were …

A Survey Of Discrepancies Among Solo Parts Of Editions And Manuscripts Of Carl Maria Von Weber's Concerto No. 1 In F Minor, Op. 73., Ronnie Everett Wray

LSU Historical Dissertations and Theses

This monograph presents a study of the interpretation of Carl Maria von Weber's Concerto No. 1 in F minor, Op. 73 for clarinet and orchestra. Twelve published editions are examined and compared with the two extant manuscript copies from the Library of Congress and the Deutsche Staatsbibliothek. Because of Weber's apparent haste or carelessness in committing music to paper, and because of certain traditions in performance, a number of attempts have been made to edit this concerto. Given the large number of editions available to the clarinetist and the varied interpretations they present, it would be difficult to determine the …

Distribution And Migration Patterns Of Subsurface Fluids In The Wilcox Group In Central Louisiana, Masaaki Funayama

LSU Historical Dissertations and Theses

Variations of pore fluid properties as well as lithologies in central Louisiana were investigated using more than 300 conventional well logs in order to understand processes and patterns of fluid flow in the Wilcox Group in the region. A statistical evaluation of log parameters was done to provide information required for interpreting older logs in the region.

Most of the study area is located between the northern and southern Louisiana salt dome basins, and there is a general lack of significant structural deformation. The two discrete sand dominated zones in the study area are the Wilcox and the post- Vicksburg …

Distribution And Migration Patterns Of Subsurface Fluids In The Wilcox Group In Central Louisiana, Masaaki Funayama

LSU Historical Dissertations and Theses

Variations of pore fluid properties as well as lithologies in central Louisiana were investigated using more than 300 conventional well logs in order to understand processes and patterns of fluid flow in the Wilcox Group in the region. A statistical evaluation of log parameters was done to provide information required for interpreting older logs in the region.

Most of the study area is located between the northern and southern Louisiana salt dome basins, and there is a general lack of significant structural deformation. The two discrete sand dominated zones in the study area are the Wilcox and the post-Vicksburg groups. …

Evolution Of The Site Of Afton Villa, Kathleen Mills Perilloux

LSU Historical Dissertations and Theses

The gardens of Afton Villa Plantation are a rare surviving example from the 1840-1860 period in Louisiana. The gardens are open to the public and are being maintained and enhanced by the present owners. The site was placed on the National Register of Historic Places in 1983. The history of the entire site of Afton Villa in West Feliciana Parish, Louisiana is discussed, tracing the historical, cultural and design influences that affected the site's development, beginning with the original settlers in the late 1700's. The house and gardens known as Afton Villa, built in 1849 by wealthy planter David Barrow …

Diffusivity Estimation For Counterdiffusing Reactants In Catalytic Solids., Chauchyun Chang

LSU Historical Dissertations and Theses

The diffusivities of molecules whose sizes approach the intracrystalline pore sizes of zeolites have been studied at and near conditions prevailing during catalysis, by both desorption and kinetics techniques. For the desorption approach, a series of unary isothermal desorption experiments (following an almost instantaneous initial temperature rise) were conducted for toluene or benzene with five different zeolites. Diffusion and readsorption are shown to control the process. The intracrystalline diffusivities (D$\sb{\rm e}$) were derived by fitting the desorption curves with four models of varying complexity; only models which take into account readsorption (either at equilibrium or not) can both fit the …

Plant Allelochemicals And Insect Pathogens: The Effects Of Alpha-Tomatine On The Susceptibility Of Pseudoplusia Includens (Walker) And Heliothis Zea (Boddie) To The Entomogenous Fungus Nomuraea Rileyi (Farlow) Samson., Fernando Covas Gallardo

LSU Historical Dissertations and Theses

Research was conducted to determine the impact of the allelochemical, $\alpha$-tomatine, on the susceptibility of the lepidopterous pests, Heliothis zea (Boddie) and Pseudoplusia includens (Walker) to the entomogenous fungus, Nomuraea rileyi (Farlow) Samson. In one experiment, $\alpha$-tomatine inhibited colony formation and growth of N. rileyi, in vitro. In vivo, larval growth and developmental time of H. zea were affected by $\alpha$-tomatine and N. rileyi. The fungus was detected in the hemolymph and tissue of larvae treated with two concentrations (LC$\sb{50}$ and LC$\sb{90}$) of N. rileyi conidia, including those fed $\alpha$-tomatine. At the LC$\sb{50}$, $\alpha$-tomatine protected larvae against N. rileyi and …

Application Of The Fluctuating Watertable Model In The Management Of A Controlled-Drainage/Subirrigation System., Rufino Sapiton Garzon

LSU Historical Dissertations and Theses

A model was developed to predict daily change in WT depth and was used for WT management simulations. The model was calibrated and tested using climatological and WT data for a subsurface drainage system at Louisiana Agricultural Experiment Station's Ben Hur Research Farm, Baton Rouge, Louisiana. Monthly daily reaction factor and daily recharge coefficient were determined. Recharge coefficients were multiplied by a correction factor to account for antecedent soil moisture condition prior to the onset of rain. Two methods considered in the estimate of the correction factor were: Method I, the correction factor was taken as the reciprocal of the …

Petrogenesis And Provenance Of Epiclastic Volcanic Cobbles From The Cretaceous Woodbine Formation, Southwest Arkansas., Christina Lee Livesey

LSU Historical Dissertations and Theses

Whole rock and mineral compositions of epiclastic volcanic cobbles have been used to reconstruct the evolution of the magmatic system that supplied this volcanic material. Using techniques that have been applied to stratified volcanic deposits, the chemical and mineralogical variation of volcanic material preserved as cobbles in sedimentary rocks has been used to identify a cogenetic suite of igneous rocks and to evaluate possible fractionation mechanisms. Volcanic rocks, preserved as rounded cobbles in the upper Cretaceous Woodbine Formation of SW Arkansas, range from mafic, pyroxene-rich phonolites to felsic, crystal-poor phonolites. Felsic lithologies contain abundant sanidine phenocrysts and lesser amounts of …

Sampling And Analysis Of Dynamic Headspace Volatile Compounds From Selected Protein-Rich Food Matrices., Jose Ernesto Matiella

LSU Historical Dissertations and Theses

Volatile compounds from two protein-rich foods, crabmeat and eggs, were studied with emphasis on qualitative and quantitative determination of a wide variety of chemical substances including degradation compounds from amino acids, lipids and carboyhdrates as well as compounds derived from the packaging material and the environment. Boiled and pasteurized blue crab (Callinectes sapidus) meat samples were analyzed for volatile flavor components by dynamic headspace sampling, capillary column gas chromatography and mass spectrometry. Fifty-three volatile compounds were identified in crabmeat samples. Levels of volatile compounds in both samples were compared and it was found that the boiled crabmeat contained higher levels …

Predicting Potassium Uptake By White Clover With A Mathematical Model And Assessment Of White Clover Phosphorus And Potassium Status With The Dris., Hubert Joseph Savoy Jr

LSU Historical Dissertations and Theses

Environmental concerns emphasize the requirement for diagnostic tools compatible with more intensively managed agricultural systems. Two recent approaches, the Barber-Cushman mechanistic model and the Diagnosis and Recommendation Integrated System (DRIS), appear to offer more accurate predictions of soil nutrient supply and more flexible means of assessing plant nutrient status, respectively, than conventional methods. The objectives of this research were to verify the aforementioned models for predicting K uptake and assessing P and K status of LA S-1 white clover. In growth chamber experiments, the Barber-Cushman model correctly predicted K uptake by plants for up to 21 days from Rita muck, …

Database Constraint Enforcement: A Decompositional Approach., Yuejian Sheng

LSU Historical Dissertations and Theses

This thesis presents an efficient and integrated approach to integrity constraint checking for advanced database systems. The proposed approach essentially consists of three phases: constraint decomposition, global enforcement strategy and local enforcement tuning. The central theme of this dissertation is the development of constraint decomposition theory, which can be used to decompose each constraint formula into a set of constraint sub-formulas. The constraint sub-formulas derived from the decomposition satisfy the sufficient conditions imposed by the original constraint and are also much simpler and more efficient to check. The decomposition is done only once for each constraint, at the time of …

Ernest Guiraud: A Biography And Catalogue Of Works., Daniel O. Weilbaecher

LSU Historical Dissertations and Theses

Ernest Guiraud (1837-1892) was born in New Orleans, where he received his early musical training from his parents, both graduates of the Paris Conservatoire. His father, Jean-Baptiste Guiraud, had won the Prix de Rome in 1827. Ernest's first opera, David, was staged at the Theatre d'Orleans in April 1853. Later that year Ernest entered the Paris Conservatoire; he studied piano with Marmontel, harmony with Barbereau, and composition with Halevy. He won the Prix de Rome in 1859. During the three years (1860-1862) Guiraud spent in Italy as a Prix de Rome laureate, he composed a mass, an opera-buffa (Gli avventurieri), …

Fast Parallel Algorithms On A Class Of Graph Structures With Applications In Relational Databases And Computer Networks., Sridhar Radhakrishnan

LSU Historical Dissertations and Theses

The quest for efficient parallel algorithms for graph related problems necessitates not only fast computational schemes but also requires insights into their inherent structures that lend themselves to elegant problem solving methods. Towards this objective efficient parallel algorithms on a class of hypergraphs called acyclic hypergraphs and directed hypergraphs are developed in this thesis. Acyclic hypergraphs are precisely chordal graphs and their subclasses, and they have applications in relational databases and computer networks. In this thesis, first, we present efficient parallel algorithms for the following problems on graphs. (1) determining whether a graph is strongly chordal, ptolemaic, or a block …

Synthesis And Characterization Of Linear And Star -Branched Poly(Gamma-Stearyl-L-Glutamate)., Drew Scott Poche

LSU Historical Dissertations and Theses

The synthesis and characterization of linear and star branched poly($\gamma$-stearyl-L-glutamate) (PSLG) is reported. A new synthesis for N-carboxyanhydride (NCA) monomers was developed by employing bis(trichloromethyl)carbonate (triphosgene) to functionalize the corresponding $\alpha$-amino acid. Multi-functional primary amino initiators (central units) were synthesized to enable the production of three, four, six and nine arm star polymers by reaction of the central units with the desired NCA. Linear PSLG was produced by either sodium methoxide initiation or benzyl amine initiation of $\gamma$-stearyl-L-glutamate-N-carboxyanhydride (SLGNCA). The highest molecular weight polymers were produced from methoxide initiation. Other molecular weights can be produced from the same ratio of …

Identification Of Vibrio Anguillarum And Vibrio Ordalii By A Monoclonal Antibody Coagglutination Assay., Zhongshi Wang

LSU Historical Dissertations and Theses

Vibrio anguillarum exhibits species-specific antigens on the protein core of the polar flagellum (H) and H-determinants which are expressed by heterologous Vibrio species. Monoclonal antibody (MAb) which reacted with flagella core protein by ELISA were affinity purified from protein A-sepharose. Staphylococcus aureus Cowan 1 cells armed with anti-H MAb coagglutinated each of the 10 V. anguillarum O-antigen serovars within 1 to 2 minutes, as well as V. ordalii isolates. These findings suggest these two vibrios express similar if not identical species-specific H-determinants. The anti-H reagent did not coagglutinate 20 heterologous Vibrio species. MAb generated against LPS, extracted from V. anguillarum …

Functionality And Binding Of Washed Mechanically Separated Beef In Restructured Meats., Kyung Chul Koh

LSU Historical Dissertations and Theses

Binding and texture are important attributes of restructured meats which are dependent upon protein properties. Meat was pre-salted with 0, 2.25, 4.5, 6.75, or 9.0% sodium chloride (NaCl) and extracted with buffers (pH 6.0) containing 0, 0.6, 1.2, 1.8, or 2.4 M NaCl to determine total extractable protein (TEP). Increased NaCl level in extraction buffers increased TEP, but NaCl levels of 2.25 and 4.5% in meat interfered with release of solubilized proteins into extraction solutions. Restructured beef roasts of 0, 0.45 or 0.9% NaCl and 0, 0.225 or 0.45% sodium tripolyphosphate (STPP) were manufactured with 10% mechanically separated beef (MSB), …

The Socioeconomic Aspects Of Beef Cattle Production In Louisiana., Emmanuel Kagaba Nzabanita

LSU Historical Dissertations and Theses

This study was divided into: (1) a descriptive study of the farm resources, management practices, veterinary services utilization, and socio-psychological characteristics of Louisiana ranchers in relation to beef cattle performance, (b) a classification of the ranchers according to their utilization of veterinary services with the objective of identifying producer characteristics that are associated with frequent, moderate, and non-use of veterinary services, and (c) identification of factors associated with continuing or ending beef cattle production. The intensity of management, herd health and veterinary services utilization was quantified by scoring and ranking indicator variables that defined these composite variables. Most ranchers had …

Palynological And Carbon-Isotopic Techniques For Reconstruction Of Paleomarsh Salinity Zones., Gail Lois Chmura

LSU Historical Dissertations and Theses

Palynological and carbon-13 analyses were studied to determine their practicality as tools for paleoecological reconstruction of marsh vegetation communities of the Mississippi delta plain. Both were calibrated on marsh surface sediment samples from four vegetation zones within Barataria Basin, Louisiana: fresh, intermediate, brackish and salt marsh. Samples were taken concurrent to vegetation sampling to allow comparison of sediment data to plant biomass and clip plot data from each of the four zones. The $\partial\sp{13}$C of sedimentary carbon reflects the proportion of C-3 and C-4 species at a site (which corresponds to a salinity gradient in the basin). The average from …

Constructing Isospectral But Nonisometric Riemannian Manifolds., Sheng Chen

LSU Historical Dissertations and Theses

In this paper, we examine the examples of isospectral but non-isometric Riemannian manifolds given by Milnor, Ikeda, and Vigneras. Of these, only Milnor's example is accounted for by Sunada's method of constructing isospectral manifolds, and even then only as an "unnatural" construction.

Authorial Introductions: Presentations Of The Self As Author In Prefaces And Autobiographies. (Volumes I And Ii)., Laurie Frances Leach

LSU Historical Dissertations and Theses

This dissertation examines the prefaces and autobiographies of creative writers as "authorial introductions," textual spaces in which writers present themselves to their readers as authors. It consists of three main parts. Part One concerns autobiographical prefaces by two writers, Nathaniel Hawthorne and Mary Shelley, who did not write autobiographies and who were defensive about the autobiographical content of their prefaces. Both writers were ambivalent about authorship and hesitant about bringing themselves "forward in print," but within the limits of their prefaces, they were able to speak autobiographically and portray themselves as authors. Part Two examines the autobiographies and prefaces of …

Age Of Onset And Duration Variables: Relationship To Primary And Secondary Psychopathology Of Bulimia Nervosa., Darlene Broussard Witcher

LSU Historical Dissertations and Theses

Over the past decade there has been growing concern about the syndrome of bulimia nervosa. Current theoretical models of the etiology and symptomatology of bulimia predict that the psychopathology of the eating disorder worsens over time. The specific purposes of this study was to examine the effect of onset age and duration of the disorder on the primary and secondary psychopathology of bulimia nervosa at the time of presentation for treatment. The results suggest that binging and purging worsen with increasing duration and older age of onset, accompanied by increased weight and greater distortion of body size estimation. Furthermore, subjects …

Interaction Properties Of Geogrids In Reinforced Soil Walls, Testing And Analysis., Khalid A. Farrag

LSU Historical Dissertations and Theses

The considerable development of the geosynthetics and their increasing use in soil reinforcement made it necessary to develop methods of measuring the interaction properties and modeling load transfer in reinforced soil structures. The current testing procedures demonstrate significant limitations related to the testing methodology and data interpretation. In order to address these limitations, a pull-out box and direct shear box were constructed. The design of these boxes overcomes most of theses limitations and provides the capability of conducting displacement-rate controlled tests for the evaluation of short-term behavior of the soil-reinforcement system, and load-controlled tests to evaluate their time-dependent performance. The …

The Mechanism Of Low Levels Of Nitrogen Dioxide Reaction With Unsaturated Fatty Acid Esters., Aris Ann Gallon

LSU Historical Dissertations and Theses

Nitrogen Dioxide is a toxic air pollutant that exists at less than 0.5 ppm in the atmosphere. This toxic compound is known to initiate autoxidation of unsaturated fatty acids both in vivo and in vitro. When autoxidation occurs in vivo, membrane damage that can lead to cell death can occur. Low concentrations of nitrogen dioxide were shown to react with the polyunsaturated fatty acid esters, methyl linoleate and methyl linolenate, by a H-abstraction mechanism. However, methyl oleate, an unsaturated fatty acid ester, was demonstrated to react with a low concentration of nitrogen dioxide by only an addition mechanism. Although methyl …

A Study Of Musical And Extra-Musical Imagery In Rachmaninoff's "Etudes-Tableaux", Opus 39., Raymond J. Gitz

LSU Historical Dissertations and Theses

The nine Etudes-Tableaux, op. 39 (1916-17) for piano solo are the last important works written by Sergei Rachmaninoff (1873-1943) before his exile from Russia in 1917. The use of the word "Tableaux" in the title suggests an association with pictures, paintings, or scenes. Although the composer often wrote under the external influence of extra-musical sources, he rarely revealed them. This study examines the musical and extra-musical imagery which influenced Rachmaninoff's compositional style as observed in op. 39, the most important elements being the Dies irae from the Roman Catholic Mass for the Dead, Russian chant, bell sonorities, and paintings by …

Synthesis Of Cyclopentadienyl Derivatives: Stereoelectronic Effects In The Diels-Alder Cyclocondensation Reaction., Jose Gabriel Garcia

LSU Historical Dissertations and Theses

This dissertation is divided into three chapters. Chapter one describes attempts to synthesize bis-monosubstituted cyclopentadienyl compounds as probes for complexation to transition metals. Prior to the attempted synthesis of bis-monosubstituted cyclopentadienyl compounds, the syntheses of two different organic frameworks bearing a C$\sb2$-symmetry axis is described; namely, the 1,3-dioxolane-2,2-dimethyl and the 1,1$\sp\prime$-binaphthyl frameworks. Chapter two describes the attempts to synthesize monofulvene derivatives as model compounds for the synthesis of difulvenes. Also, chapter two describes the attempts to synthesize different difulvene derivatives, that for the most part bear a C$\sb2$-symmetry axis, as model compounds for cyclopentadienyl-derivative anions to be completed to transition …

Studies In The Electrochemistry Of Insulators And Ion Transport: Anodization, Oscillometry, Electro-Osmosis, And Capillary Electrophoresis., Kiumars Ghowsi

LSU Historical Dissertations and Theses

In part one, an analytical model for the growth kinetics of the anodic oxidation of Si at constant voltage is developed. The theoretical model derived for the film growth rate is consistent with the existing empirical relation reported earlier. Electronic current density, the major total current component, is shown to be nonohmic and space charge limited. Equations are derived, each as a function of time, for the total current density, the electronic current density, and the ionic efficiency during anodic oxidation. These theoretical predictions are in good agreement with the available experimental data. In part two, the high frequency conductances …

The Relationship Between Family Communication And Psychosocial Adjustment Of Cancer Patients., James Micheal Gotcher

LSU Historical Dissertations and Theses

The purpose of this study was to examine the relationship between patient-family communication and psychosocial adjustment to cancer. Cancer patients receiving radiation therapy (n = 105) were interviewed using a semi-structured format. The majority of female subjects were being treated for breast cancer and the majority of male subjects for prostate cancer. Questionnaires assessing psychosocial adjustment and patient-family communication were employed. Psychosocial adjustment was tapped by means of the Psychosocial Adjustment to Illness Scale (PAIS). The PAIS provides a global adjustment score and taps seven independent domains of adjustment: health care orientation, vocational environment, domestic environment, sexual relations, extended family …

Computational Neural Learning Formalisms For Perceptual Manipulation: Singularity Interaction Dynamics Model., Sandeep Gulati

LSU Historical Dissertations and Theses

This dissertation addresses a fundamental problem in computational AI--developing a class of massively parallel, neural algorithms for learning robustly, and in real-time, complex nonlinear transformations from representative exemplars. Provision of such a capability is at the core of many real-life problems in robotics, signal processing and control. The concepts of terminal attractors in dynamical systems theory and adjoint operators in nonlinear sensitivity theory are exploited to provide a firm mathematical foundation for learning such mappings with dynamical neural networks, while achieving a dramatic reduction in the overall computational costs. Further, we derive an efficient methodology for handling a multiplicity of …

Evaluation Of Selected Pulmonary Function Tests In Resting Thoroughbred Horses Having Reversible, Experimentally Induced Respiratory Dysfunctions., Alan John Guthrie

LSU Historical Dissertations and Theses

The purpose of the first part of this study was to develop computerized techniques for automation of instrument calibration, data collection and calculation of indices of pulmonary mechanical function in resting and exercising horses. The microcomputer system developed enabled a single trained technician to reliably operate the equipment in an equine pulmonary mechanics laboratory. The first experiment investigated the temporal effects of histamine and methacholine aerosols on indices of pulmonary mechanics derived from the linear equation of motion. Data calculated on a breath-by-breath basis were too variable to be reliably modeled. Following application of averaging techniques, the temporal effects of …