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Statistical Models And Genetic Evaluation Of Binomial Traits, Jose Lucio Guerra Jan 2004

Statistical Models And Genetic Evaluation Of Binomial Traits, Jose Lucio Guerra

LSU Doctoral Dissertations

Generalized mixed model methodology and MCMC simulations were used to estimate genetic parameters for calving rate and calf survival with the normal, probit, and logistic models. Calving rate and calf survival were defined as 0 each time a cow failed to calf or a calf failed to survive to weaning age, otherwise they were set to 1. Data were available on 1,458 cows and on 5,015 calves. Cows produced a total of 4,808 records over 4 discrete generations of rotational crosses between Angus, Brahman, Charolais, and Hereford from 1977 to 1995. The heritability of calving rate and calf survival, the …

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Abiotic And Biotic Factors Affecting The Distribution Of Solenopsis Invicta Buren, Brachymyrmex Sp., And Linepithema Humile (Mayr) In East Baton Rouge Parish, Louisiana, Jessica Lynn Rosson Jan 2004

Abiotic And Biotic Factors Affecting The Distribution Of Solenopsis Invicta Buren, Brachymyrmex Sp., And Linepithema Humile (Mayr) In East Baton Rouge Parish, Louisiana, Jessica Lynn Rosson

LSU Master's Theses

Ant populations and their distribution are affected by many circumstances. Abiotic factors such as weather, water availability, and soil characteristics may determine if a habitat is suitable for ants. Other factors such as level of disturbance, available food resources, reproductive biology, and natural enemies also contribute to defining ant distribution. Three ant species in East Baton Rouge parish, Louisiana were studied to determine what factors affected their distribution by measuring abiotic and biotic factors at sampling sites throughout the parish. These factors included weather, water availability, vegetation types, level of disturbance, and soil characteristics. Factors which predict abundance of Solenopsis …

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The Influence Of Bulgarian Folk Music On Petar Christoskov's Suites And Rhapsodies For Solo Violin, Blagomira Paskaleva Lipari Jan 2004

The Influence Of Bulgarian Folk Music On Petar Christoskov's Suites And Rhapsodies For Solo Violin, Blagomira Paskaleva Lipari

LSU Major Papers

Petar Christoskov, born in 1917 in Sofia, is among the most prolific of Bulgarian violinists, pedagogues and composers of the twentieth century. Christoskov’s Suites and Rhapsodies for solo violin represent both an internal evolution of Bulgarian music and an incorporation of the Bulgarian musical tradition into the larger world music scene. Bulgaria’s folk musical tradition was routinely infused and enriched over the course of the late 19th and 20th centuries. Christoskov’s efforts were presaged and made possible by a host of earlier composers and performers. But the evolution of the Bulgarian style was also shaped by larger historical trends and …

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Quality Assurance Testing Of The Eclox-M In Detecting Terrorism Threats In Louisiana's Public Drinking Water Systems, Jessica Coleman Jan 2004

Quality Assurance Testing Of The Eclox-M In Detecting Terrorism Threats In Louisiana's Public Drinking Water Systems, Jessica Coleman

LSU Master's Theses

A quality assurance testing of the ECLOX-M™, a rapid water quality indicator used in potential terrorist attacks, was evaluated for its adequacy in nine regional Louisiana water systems. The ECLOX-M™ system uses enhanced chemiluminescence to measure toxicity in water by integration of a mixture of luminol (C8H7O3N3), and an oxidant in the presence of a catalyst enzyme - horseradish peroxidase (HRP). Water samples were tested for chemiluminescence, chlorine content, pH, and arsenic and/or nerve agent/pesticide contamination. In addition, three toxic industrial chemical standards were evaluated (mercury, a volatile liquid mixture, and a …

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Evaluation Of Growth, Production And Cold Tolerance Of Four Varieties Of Tilapia, Patricio Enrique Paz Jan 2004

Evaluation Of Growth, Production And Cold Tolerance Of Four Varieties Of Tilapia, Patricio Enrique Paz

LSU Master's Theses

As global tilapia production grows, it is important to characterize varieties available for production and generate data on environmental tolerances. This study generated data on tolerances, adaptabilities and production characteristics of four tilapia varieties. Goals of this study were to: (1) compare growth of four tilapia varieties in two types of recirculating systems, (2) evaluate juvenile growth of seven tilapia varieties in fresh and brackishwater mesocosms, and (3) estimate cold tolerance of juveniles of four tilapia varieties in fresh and brackishwater. Nile tilapia (Oreochromis niloticus), blue tilapia (Oreochromis aureus), Mississippi commercial strain tilapia (MCS), and Florida red tilapia (FRT) were …

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Synthesis And Antibacterial Assessment Of Water-Soluble Hydrophobic Chitosan Derivatives Bearing Quaternary Ammonium Functionality, Mrunal R. Thatte Jan 2004

Synthesis And Antibacterial Assessment Of Water-Soluble Hydrophobic Chitosan Derivatives Bearing Quaternary Ammonium Functionality, Mrunal R. Thatte

LSU Doctoral Dissertations

Chitosan is a naturally occurring, bio-degradable, non-toxic, non-allergenic bio-polysaccharide derived from chitin, found in abundance in nature. Studies aimed at deriving newer applications of chitosan are hence of interest. Among these, one of the focuses of investigations is aimed at excellent antimicrobial activity demonstrated by chitosan. In this context, certain quaternary ammonium derivatives of chitosan have been shown in the past to be highly effective antibacterial materials. In the present study, substituted chitosan derivatives were synthesized and further quaternized using Quat-188 to produce water soluble derivatives at neutral pH. The antibacterial assessments of the quaternized derivatives of substituted chitosan were …

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Developing Embryo Technologies For The Eland Antelope (Taurotragus Oryx), Gemechu G. Wirtu Jan 2004

Developing Embryo Technologies For The Eland Antelope (Taurotragus Oryx), Gemechu G. Wirtu

LSU Doctoral Dissertations

Assisted reproductive technologies developed in domestic cattle serve as a starting point in similar studies on nondomestic bovids. The common eland is a useful model species for studies on rare tragelaphine antelopes. In Chapter 3 of the present study, effects of components/attributes of protein-free embryo culture media on the in vitro development of in vitro-derived bovine embryos were evaluated. A 2 x 2 factorial study comparing effects of groups of amino acids (20aa or 11aa) in two base media (modified KSOM or BM-3) demonstrated that amino acids and base medium affected embryonic development. A subsequent 7 x 2 factorial experiment …

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Modeling The Effects Of Rainfall Intensity And Deep Chiseling On Infiltration And Runoff Within Drainmod For Alluvial Soils, Daniel Nyabiba Moriasi Jan 2004

Modeling The Effects Of Rainfall Intensity And Deep Chiseling On Infiltration And Runoff Within Drainmod For Alluvial Soils, Daniel Nyabiba Moriasi

LSU Doctoral Dissertations

Accurate hydrologic models are needed to aid engineers and researchers design, install and evaluate efficient and cost-effective agricultural water management systems to reduce risks associated with food production, and to reduce soil erosion and water pollution. One model used for the alluvial soils of Louisiana is DRAINMOD. This model does not accurately predict infiltration and runoff for the crusting-prone alluvial soils of Louisiana. The main goal of this study was to modify the current DRAINMOD model to incorporate the effects of rainfall intensity and deep chiseling to improve its estimation of infiltration and surface runoff. The second goal was to …

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Against Biopoetics: On The Use And Misuse Of The Concept Of Evolution In Contemporary Literary Theory, Bradley Bankston Jan 2004

Against Biopoetics: On The Use And Misuse Of The Concept Of Evolution In Contemporary Literary Theory, Bradley Bankston

LSU Doctoral Dissertations

This dissertation is a critical assessment of "biopoetics:" a new literary theory that attempts to import ideas from evolutionary science to the study of literature. Borrowing from the field of evolutionary psychology, the biopoeticists argue that some literary forms and themes are particularly valuable because they result from our innate and evolved cognitive structure; they also attempt to create a normative aesthetic from the idea that evolution is progressive. In its first half, this study examines the claims of evolutionary psychology and their application by the biopoeticists; in the second half, it examines the idea that evolution is progressive, and …

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Hemodynamic Responses Following Dynamic Resistance Exercise In Young And Older Adult Women, Rafael Antonio Reyes Jan 2004

Hemodynamic Responses Following Dynamic Resistance Exercise In Young And Older Adult Women, Rafael Antonio Reyes

LSU Doctoral Dissertations

This investigation examined the effects of age, exercise and test condition on hemodynamic variables, autonomic and vascular function in relation to resistance exercise (RE). The associations among these variables were also examined. METHODS: Sixteen young (21.4+1.4 yrs) and 16 older (69.7+3.9 yrs) women performed 5- and 15- repetition maximal (RM) of knee extension RE. Continuous blood pressure (BP) and electrocardiography (ECG) data were recorded. The dependent variables are reported at pre-exercise, peak exercise and recovery period. Heart rate variability data were derived from 5- and 10-min segments before and after exercise. Resting and after arterial occlusion forearm vascular function indices …

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Entry-Level Job Skills Needed By Wildlife Management Professionals, Billy Warren Delany, Jr. Jan 2004

Entry-Level Job Skills Needed By Wildlife Management Professionals, Billy Warren Delany, Jr.

LSU Doctoral Dissertations

The research purpose was to identify the job skills needed by entry-level wildlife managers, which was accomplished by utilizing a Delphi panel of wildlife management experts from the academic, private and public employment sectors. The Delphi panel was selected from a committee nominated, pool of 81 innovative wildlife management experts. The panel for Rounds One, Two, and Three of this Delphi survey consisted of 31, 32, and 31 members, respectively. The Delphi process involved three survey rounds. Round One consisted of collecting and developing entry-level job skill items from the panel, which resulted in 382 items. Round Two developed initial …

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Imidazolinone-Tolerant Rice: Weed Control, Crop Response, And Environmental Impact, Ronald Joseph Levy, Jr. Jan 2004

Imidazolinone-Tolerant Rice: Weed Control, Crop Response, And Environmental Impact, Ronald Joseph Levy, Jr.

LSU Doctoral Dissertations

Field and greenhouse research was conducted from 1999 to 2003 to evaluate weed control in imidazolinone-tolerant (IT) rice (Oryza sativa L.) under various tillage and planting systems, tolerance of IT rice cultivars to imazethapyr rate and application timing, and the impact of IT technology and tillage systems on solids runoff in rice drainage water. In both conventional and reduced tillage systems imazethapyr applied preemergence and postemergence at 70 g ai/ha controlled red rice (Oryza sativa L.), barnyardgrass [Echinochloa crus-galli (L.) Beauv.], Amazon sprangletop [Leptochloa panicoides (Presl) Hitchc.], and rice flatsedge (Cyperus iria L.) 87 to 99%. Indian jointvetch (Aeschynomene indica …

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Site-Directed Mutagenesis Studies Of E. Coli Biotin Carboxylase, Valerie Melissa Sloane Jan 2004

Site-Directed Mutagenesis Studies Of E. Coli Biotin Carboxylase, Valerie Melissa Sloane

LSU Doctoral Dissertations

Acetyl-CoA carboxylase is an essential enzyme in all plants, animals, and bacterie, where it catalyzes the committed step in fatty acid synthesis. The Escherichia coli version of the enzyme has three functional components that dissociate readily: biotin carboxylase, carboxyltransferase, and a biotin carboxyl carrier protein. The biotin carboxylase component catalyzes the ATP-dependent carboxylation of biotin, using bicarbonate as the carboxylate source. Biotin carboxylase is a member of a functionally diverse superfamily of proteins known as the ATP-grasp enzymes. In the first study, four residues of biotin carboxylase, Lys 116, Lys 159, His 209, and Glu 276, were selected for site-directed …

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Leptin In Horses: Influences Of Body Condition, Gender, Insulin Insensitivity, Feeding, And Dexamethasone, Joshua Allen Cartmill Jan 2004

Leptin In Horses: Influences Of Body Condition, Gender, Insulin Insensitivity, Feeding, And Dexamethasone, Joshua Allen Cartmill

LSU Doctoral Dissertations

The experiments described herein were designed to answer questions that arose from initially attempting to determine whether treatment with dexamethasone increased concentrations of leptin in geldings. Dexamethasone treatment did in fact increase leptin concentrations in mares, geldings, and stallions. Additional experiments were designed to determine leptin's interaction, not only with the adrenal axis, but with the thyroid axis, the growth hormone/insulin-like growth factor-1 axis, as well as glucose and insulin metabolism in geldings, mares, and stallions. During the course of these experiments, differences in leptin concentrations in the horse were attributed to degree of body condition, gender, and feeding time. …

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Chemical Production Complex Optimization, Pollution Reduction And Sustainable Development, Aimin Xu Jan 2004

Chemical Production Complex Optimization, Pollution Reduction And Sustainable Development, Aimin Xu

LSU Doctoral Dissertations

The objective of this research is to propose, develop and demonstrate chemical production complex optimization to determine the optimal configuration of chemical plants in a superstructure of possible plants. The Chemical Complex Analysis System is a new methodology that has been developed to determine the best configuration of plants in a chemical production complex based on the AIChE Total Cost Assessment (TCA) for economic, energy, environmental and sustainable costs. All new, energy-efficient, and environmentally acceptable plants using greenhouse gases that can produce potentially commercial products designed with HYSYS were integrated into the chemical complex using the System. The optimum configuration …

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Isolation And Characterization Of Carbonic Anhydrase From Ostertagia Ostertagi, Andrew Allan Derosa Jan 2004

Isolation And Characterization Of Carbonic Anhydrase From Ostertagia Ostertagi, Andrew Allan Derosa

LSU Doctoral Dissertations

The first event in the infection process of Ostertagia ostertagi in cattle is the process of exsheathment. Before trichostrongylid nematodes can transition from a free-living infective stage larva (L3) on pasture to a parasitic existence within the ruminant host, it must first undergo exsheathment. Exsheathment is the process whereby the L2 cuticle retained from the previous molt is cast from the L3. Exsheathment enables the developmental transition from a free-living stage on pasture to a parasitic existence in the bovine host. For those species with a predilection site in the abomasum, such as O. ostertagi, …

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Haunted By The Uncanny - Development Of A Genre From The Late Eighteenth To The Late Nineteenth Century, Alexandra Maria Reuber Jan 2004

Haunted By The Uncanny - Development Of A Genre From The Late Eighteenth To The Late Nineteenth Century, Alexandra Maria Reuber

LSU Doctoral Dissertations

This dissertation traces the development of the supernatural from the late eighteenth to the late nineteenth-century. Since supernatural elements are unknown and unfamiliar, they easily arouse anxiety, fear, and even result in terror. As such they produce the effect of the uncanny and introduce the psychological component into the selected literary corpus taken from the English Gothic novel, the German Schauerroman, and the French littérature fantastique. The analysis of the selected material is based on a psychoanalytical approach using Sigmund Freud’s understanding of the uncanny, his dream analysis, and his view of the conscious and unconscious, but also considers Carl …

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Molecular Genetics And Functions Of Kaposi's Sarcoma-Associated Herpesvirus Glycoproteins In Viral Entry And Virus-Induced Cell Fusion, Rafael E. Luna Jan 2004

Molecular Genetics And Functions Of Kaposi's Sarcoma-Associated Herpesvirus Glycoproteins In Viral Entry And Virus-Induced Cell Fusion, Rafael E. Luna

LSU Doctoral Dissertations

Kaposi’s sarcoma-associated herpesvirus (KSHV) is considered the etiologic agent of Kaposi’s sarcoma and several lymphoproliferative disorders. Recently, the full-length KSHV genome has been cloned into a bacterial artificial chromosome (BAC) and successfully recovered in 293 cells. The herpesviral glycoproteins are structural components of the KSHV particle and are thought to facilitate virus entry, egress and virus-induced cell fusion. Investigations, described herein, have focused on the genetic manipulation of the KSHV-BAC36 in order to address the role of K8.1 glycoprotein in virus entry and the role of the carboxyl tail a-helices of glycoprotein (gB) in virus-induced cell fusion. In addition, a …

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Psychological And Neuropsychological Correlates Of Postconcussional Disorder, Joy Helena Wymer Jan 2004

Psychological And Neuropsychological Correlates Of Postconcussional Disorder, Joy Helena Wymer

LSU Doctoral Dissertations

Chronic symptoms of Postconcussional Disorder (PCD) occur in a significant minority of mild brain injury patients. The latest research suggests an interactionistic perspective as the most logical and empirically supported pathogenesis for the development and maintenance of PCD. The interactionistic perspective implicates organic factors in the development of acute symptoms of PCD, and psychological factors in the maintenance of chronic symptoms. Possible psychological factors relevant in the maintenance of PCD symptoms include a grief response, a coping hypothesis, and the development of dysfunctional coping loops. Providing support for a psychological etiology of symptom maintenance is research indicating reduction of chronic …

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Bagasse Fiber For Production Of Nonwoven Materials, Ovidiu Iulius Chiparus Jan 2004

Bagasse Fiber For Production Of Nonwoven Materials, Ovidiu Iulius Chiparus

LSU Doctoral Dissertations

Raw materials used in nonwoven products vary greatly, covering the entire spectrum from synthetic to natural fibers. The limitation of use for industrial applications of nonwoven products has long been surpassed, today nonwovens being found in diverse applications ranging from intimate apparel to geotextiles. The present work has as its ultimate goal to develop a commercial method for characterizing some of the physical properties of bagasse or other unconventional fibers obtained through a new atmospheric extraction method, and also to create and analyze different nonwoven structures based on bagasse, kenaf and other annual plants. Bagasse fibers were extracted from sugar …

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Dry Matter Accumulation By The Start Of Seed Filling As A Criterion For Yield Optimization In Soybean, Harikrishna Modali Jan 2004

Dry Matter Accumulation By The Start Of Seed Filling As A Criterion For Yield Optimization In Soybean, Harikrishna Modali

LSU Doctoral Dissertations

Identification of criteria for predicting soybean [Glycine max (L.) Merril] yield would provide farmers with useful management tools. Such criteria not only help in predicting the yield potential but also aid the farmer in determination of environmental factors limiting crop yield. Since a certain total dry matter (TDM) level is expected to optimize yield and R5 marks the end of the period for vegetative TDM accumulation, TDM(R5) is a good putative criterion for optimal yield. Determination of yield components important in yield formation helps to substantiate TDM(R5) as a criterion for optimum yield, since they are formed during discrete periods …

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The Effects Of Inorganic And Organic Selenium Sources On Growth Performance, Carcass Traits, Tissue Mineral Concentrations, And Enzyme Activity In Poultry, Robert L, Iii Payne Jan 2004

The Effects Of Inorganic And Organic Selenium Sources On Growth Performance, Carcass Traits, Tissue Mineral Concentrations, And Enzyme Activity In Poultry, Robert L, Iii Payne

LSU Doctoral Dissertations

The purpose of this research was to compare dietary inorganic and organic Se sources in poultry. An experiment was conducted to assess daily egg production and Se deposition in eggs of hens fed diets supplemented with inorganic or organic Se. The results from this experiment indicated that hen production was not affected by Se source, and organic Se increased egg Se concentrations more than inorganic Se. Two experiments then were conducted with broilers to compare dietary organic and inorganic Se on growth performance, carcass traits, breast and plasma Se concentrations, and plasma glutathione peroxidase activity. The results from these experiments …

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Estimation Of The Effect Of Misclassifications On Diagnostic Test Performance In Two Persistent Bovine Viral Infections, Kimberly Orr Jan 2004

Estimation Of The Effect Of Misclassifications On Diagnostic Test Performance In Two Persistent Bovine Viral Infections, Kimberly Orr

LSU Doctoral Dissertations

Validation of diagnostic assay performance is hampered where no gold standard exists. Bayesian estimates of the sensitivity and specificity were applied to studies of two persistent bovine infections: bovine immunodeficiency virus (BIV), and bovine viral diarrhea virus (BVDV). BVDV pathogenesis is well described. Losses of $20 million in 1992 alone led the Danish government to mandate eradication. Two enzyme-linked immunosorbent assay (ELISA) tests were developed; one antibody-based to detect exposure, one antigen-based to detect persistent infection. Bayesian estimates of the sensitivity and specificity were 96.6% and 99.2%, and 98.2% and 99.8% for the antibody and antigen ELISA, respectively. Maximum Likelihood …

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Analysis Of Bacterial Diversity And Biogeography At The Central Arizona-Phoenix Long Term Ecological Research (Cap Lter) Site, Brian Anthony Rash Jan 2004

Analysis Of Bacterial Diversity And Biogeography At The Central Arizona-Phoenix Long Term Ecological Research (Cap Lter) Site, Brian Anthony Rash

LSU Doctoral Dissertations

The limiting factor involved in past assessments of soil bacterial diversity when using culture-independent techniques has often been the lack of sampling and replication. As a result, analyses of community structural shifts across soil environments have lacked statistical power. In this study, 23 16S rRNA gene clone libraries consisting of over 11,000 clones were constructed from soils at the Central Arizona Phoenix Long Term Ecological Research (CAP LTER) site. Subsequent ARDRA fingerprinting and partial 16S rRNA gene sequencing allowed for a more robust investigation of various components that may explain any observed variations in bacterial species composition. The designated land …

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The Non-Phosphorus Effects Of Dietary Phytase In Swine And Poultry, Jason Layne Shelton Jan 2004

The Non-Phosphorus Effects Of Dietary Phytase In Swine And Poultry, Jason Layne Shelton

LSU Doctoral Dissertations

This research was conducted to determine the non-phosphorus effects of phytase in diets for swine and poultry. An experiment was conducted to determine the effect of phytase addition on energy availability and protein and fat deposition in growing pigs. Results from this experiment indicated that phytase had small positive effects on energy availability, protein deposition, and fat deposition. In this study, 23 of 29 response variables were at least numerically increased with phytase addition. Two experiments were conducted to determine the accuracy of the energy and amino acid matrix values for Natuphos 1200 in broilers from 0 to 21 or …

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Behavioral And Electrophysiological Assessment Of Children With A Specific Temporal Processing Disorder, Annette Hurley Jan 2004

Behavioral And Electrophysiological Assessment Of Children With A Specific Temporal Processing Disorder, Annette Hurley

LSU Doctoral Dissertations

Auditory processing disorders (APDs) have received considerable attention over the past few decades. Much of the attention has focused on the controversy surrounding the operational definition of APD, the heterogeneous nature of APD, and an appropriate test battery for APD assessment. Temporal processing deficits are one characteristic of APD and are the focus of the present investigation. This investigation reports behavioral and early electrophysiological measures in a group of children with specific temporal processing difficulties and an age-matched control group. In an effort to better describe the subjects, two language tests and the SCAN-C were administered. Significant differences were found …

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Botany In Children's Literature: A Content Analysis Of Plant-Centered Children's Picture Books That Have A Plot And Characters, Sheila Lewis Goins Jan 2004

Botany In Children's Literature: A Content Analysis Of Plant-Centered Children's Picture Books That Have A Plot And Characters, Sheila Lewis Goins

LSU Doctoral Dissertations

This content analysis study examined 36 plant-centered children’s science picture books that have a plot and characters published from 1950 to present. Botanical subject matter and learning opportunities offered by these books were analyzed, along with the range and frequency of the National Science Education Standards-consistent and age-appropriate plant science concepts and principles. The science graphics, artistic innovations, and story plot of these books were also examined. Rubrics and research-based recommendations were developed to offer parents, teachers, and librarians assistance in identifying, evaluating, and using such books to help children of ages 4-8 learn about plants and enjoy plant science. …

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A New Broad Spectrum Disinfectant Suitable For The Food Industry, Giovanna Aita Dequeiroz Jan 2004

A New Broad Spectrum Disinfectant Suitable For The Food Industry, Giovanna Aita Dequeiroz

LSU Doctoral Dissertations

A unique biocide composition (patent pending) that is formed from a hydrogen peroxide and sodium hypochlorite mixture was investigated. A biocidal "complex" is formed by adding the peroxide to the hypochlorite in an amount so that the weight ratio of the peroxide to the hypochlorite is no less than 1:10. The chemical structure of this biocidal "complex" is uncertain but we postulate that it is a semi-stable complex, whose stability is disrupted by heat, acid, U/V exposure and the presence of organic matter (i.e., microbes) The antimicrobial activity of the biocidal "complex" is most likely a combination effect between oxidation …

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The Effects Of Auditory Distraction On Attention Performance In Asymptomatic College Students With A History Of Mild Head Injury, John H.,Ii Denning Jan 2004

The Effects Of Auditory Distraction On Attention Performance In Asymptomatic College Students With A History Of Mild Head Injury, John H.,Ii Denning

LSU Doctoral Dissertations

Introduction: The majority of individuals experiencing a mild head injury (MHI) recover fully experiencing few residual symptoms. Some individuals who fully recover have shown evidence of residual, albeit subtle, brain functioning disturbances on tasks requiring high levels of cognitive effort. Also, memory complaints in MHI patients may be related to these subtle difficulties when cognitive resources are overwhelmed. This study assessed a group of asymptomatic college students with a history of MHI to determine if there were any residual attention difficulties as well as increased memory complaints. Method: One-hundred twelve college students with and without a history of MHI were …

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Application Of Disturbance Theory To Assess Impacts Associated With A Three-Dimensional Seismic Survey In A Freshwater Marsh In Southwest Louisiana, Aaron Stuard Bass Jan 2004

Application Of Disturbance Theory To Assess Impacts Associated With A Three-Dimensional Seismic Survey In A Freshwater Marsh In Southwest Louisiana, Aaron Stuard Bass

LSU Doctoral Dissertations

This study examined various practical and theoretical aspects of disturbance in a coastal wetland marsh in southern Louisiana. A literature review approached disturbance ecology from both practical and theoretical perspectives and assessed its applicability to developing broad predictive models. However, specific knowledge of environmental variables, competitive relationships, and the interactive effects of multiple disturbances are required for meaningful usage of these models. The Lacassine National Wildlife Refuge (LNWR) proved to be an ideal laboratory to test various aspects of ecological disturbance theory. I found that the primary disturbances affecting the LNWR have been hurricanes, droughts, water-level manipulations, prescribed burning, oil …

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