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Methods For The Characterization Of Deep-Sea Benthic Megafauna In The Vicinity Of The Deepwater Horizon Macondo Well, Stephanie Marie Sharuga Jan 2014

Methods For The Characterization Of Deep-Sea Benthic Megafauna In The Vicinity Of The Deepwater Horizon Macondo Well, Stephanie Marie Sharuga

LSU Doctoral Dissertations

Soft-sediment benthic environments are amongst the largest marine ecosystems in the world and play important roles in many ecosystem functions. In recent years, exploitation of resources and unintentional impacts on deep-sea benthic environments has increased. The Deepwater Horizon oil spill of 2010 in the northern Gulf of Mexico (GoM) represented a prime example of this. The oil spill not only highlighted deficiencies of data and information on baseline conditions, but also represented an opportunity to learn more and develop better methods for the future. Deep-sea imaging platforms such as autonomous underwater vehicles (AUVs) and remotely operated vehicles (ROVs) have been …

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Adaptive Divergence And Speciation Across Depth In A Caribbean Candelabrum Coral, Carlos Andrés Prada Montoya Jan 2014

Adaptive Divergence And Speciation Across Depth In A Caribbean Candelabrum Coral, Carlos Andrés Prada Montoya

LSU Doctoral Dissertations

Since Darwin, biologists wonder how organisms cope with environmental variation, why there are so many species, and how species form. In my dissertation, I explore how species of long-lived, clonal reef organisms originate across depth gradients. In Chapter 2, I evaluate the strength of depth to isolate populations by comparing the genes and morphologies of pairs of depth-segregated populations of the candelabrum coral Eunicea flexuosa across the Caribbean. Eunicea flexuosa is a long-lived clonal cnidarian that associates with an alga of the genus Symbiodinium. Genetic analysis revealed two depth-segregated lineages, each genetically well-mixed across the Caribbean. Survivorship data, combined with …

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L'Envers De L'Histoire De Jacques Collin: On A New Approach To Balzac's Most Infamous Criminal Mastermind, Lauren Elise Pendas Jan 2014

L'Envers De L'Histoire De Jacques Collin: On A New Approach To Balzac's Most Infamous Criminal Mastermind, Lauren Elise Pendas

LSU Master's Theses

Scholarship has failed to explore adequately how Honoré de Balzac evokes the human condition’s universal elements through his most infamous criminal mastermind: Jacques Collin, alias Vautrin. Unlike analyses of Collin that I have encountered, this thesis takes all three novels and the obscure play in which Collin appears into account, challenges the transparency of his statements and the narration’s descriptions of him, explores the conservative position framing Balzac’s critique of early nineteenth-century Paris, and actively focuses on evidence of Collin’s typical subjectivity (i.e. his insatiable desire and fallibility). Consequently, this reading does not evaluate Collin’s significance solely through his apparent …

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Numerical Investigation Of Cryopreserved Zebrafish Sperm Cell Activation In Microchannels, Thomas Foster Scherr Jan 2014

Numerical Investigation Of Cryopreserved Zebrafish Sperm Cell Activation In Microchannels, Thomas Foster Scherr

LSU Doctoral Dissertations

This aim of this research project is to probe the activation process of zebrafish spermatozoa. Zebrafish are a model species for biological engineering applications, and the cryopreservation of their reproductive cells allows for inexpensive cataloging and maintenance of valuable biological material. Evaluation of cryopreservation protocols for aquatic sperm cells is typically accomplished by motility analysis after subjecting cells to a cryopreservation treatment. In zebrafish sperm cells, motility is initiated when cells come into contact with a hypo-osmotic environment. Subsequent activation analysis is currently done manually and brings with it an inherent difficulty and error. This process is slow and not …

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"Strike Me If You Dare": Intimate-Partner Violence, Gender, And Reform, 1865-1920, Ashley Baggett Jan 2014

"Strike Me If You Dare": Intimate-Partner Violence, Gender, And Reform, 1865-1920, Ashley Baggett

LSU Doctoral Dissertations

Between 1865 and 1920, new gender expectations in the postbellum period, as well as the willingness to use the state to intervene in marriages led to social and legal reform that provided a mechanism to empower women and enforce their right to be free from violence. Women emerged from the Civil War more aware about the drawbacks of dependency. The postbellum period also witnessed massive changes with industrialization, which enabled women to participate in what were previously considered male pursuits. With their new awareness and the changes of industrialization, women negotiated a new definition of womanhood, which included the right …

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Detection And Confirmation Of Veterinary Drug Residues In Commercially Available Frozen Shrimp, Jessica Danielle Johnson Jan 2014

Detection And Confirmation Of Veterinary Drug Residues In Commercially Available Frozen Shrimp, Jessica Danielle Johnson

LSU Master's Theses

Aquaculture has grown rapidly as the world’s wild-caught fisheries approach their sustainable limits. Feed conversion in aquaculture is more efficient than in terrestrial animals. Thus with a growing world population, seafood produced through aquaculture can provide a high quality source of protein. Aquaculture systems rely on high stocking densities and commercial feeds to increase production and profitability, which increase animal stress and susceptibility to disease. Veterinary drugs are commonly used to prevent and treat disease outbreaks. Several of these drugs are banned for use in shrimp farming in the United States. These drugs can be toxic to humans, with side …

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Structural And Kinetic Investigations Of 15-Lipoxygenase-2, Matthew James Kobe Jan 2014

Structural And Kinetic Investigations Of 15-Lipoxygenase-2, Matthew James Kobe

LSU Doctoral Dissertations

Evidence suggests that 15-lipoxygenase-2 (15-LOX-2) plays an important role in the progression of atherosclerosis. Due to the medical need to discover isoform specific inhibitors of 15-LOX-2, a novel human enzyme, our goal was to determine the 3-dimensional structure. Using bacterial expression, we were able to obtain a usable quantity of enzyme with a sufficient amount of the catalytic iron bound to the enzyme, however it was sensitive to cleavage by proteases. This led to a ratio of roughly 1:1 of cleaved and uncleaved protein after the final step of purification. Solving the crystal structure revealed the reason for the protease …

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A Mixed Methods Investigation Of Post-Secondary Students' Long Bone Anatomy Knowledge Retention Through Constructivism And The Works Of Vesalius, Jennifer F. Tynes Jan 2014

A Mixed Methods Investigation Of Post-Secondary Students' Long Bone Anatomy Knowledge Retention Through Constructivism And The Works Of Vesalius, Jennifer F. Tynes

LSU Doctoral Dissertations

Understanding human long bone anatomy is an important concept to master for post-secondary students that major in medical fields since skeletal structures assist in locating a pulse, conducting clinical procedures, and identifying injection sites. Skeletal anatomy is also used to name structures associated with other organ systems like veins, arteries, and nerves. This explanatory mixed methods study explores post-secondary students’ knowledge retention and perception of various constructivist activities that utilize historical approaches based on the works of Vesalius, the Father of Modern Anatomy to teach long bone anatomy. Three treatment groups and one controlled comparison group (n= 92) were provided …

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Synthesis, Characterization, And Investigation Of The Catalytic Activity Of Nio, Cuo, And Nio-Cuo Nanoparticles On Silica As Surrogates Of Combustion-Generated Nanoparticles, Nuwan Nilanka Balapitiya Liyanage Jan 2014

Synthesis, Characterization, And Investigation Of The Catalytic Activity Of Nio, Cuo, And Nio-Cuo Nanoparticles On Silica As Surrogates Of Combustion-Generated Nanoparticles, Nuwan Nilanka Balapitiya Liyanage

LSU Doctoral Dissertations

Transition metal oxide nanoparticles contained in fly ash are known to catalyze the formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) during the waste incineration process. The potential catalytic activity of silica-supported NiO, CuO, and NiO-CuO nanoparticles for the formation of PCDD/Fs will be discussed in this dissertation. The successful synthesis of silica-supported NiO, CuO, and NiO-CuO nanoparticles as surrogates of combustion-generated nanoparticles was important to this study. The synthesis was followed by the characterization of the nanoparticle surrogates by X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS). Finally, the catalytic …

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The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe Jan 2014

The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe

LSU Doctoral Dissertations

Distracted driving continues to remain a cause of concern for a number of bodies, including government agencies, traffic safety advocacy groups and law enforcement agencies, because of its traffic safety risks. The driving simulator continues to be popular with researchers in collecting data on performance variables that provide scientific knowledge of the effects of distracted driving. Several of these performance variables can be used to quantify a single distracting effect, resulting in a multivariate dataset. A literature review of related studies revealed that researchers overwhelmingly use univariate (single and multiple) tests to analyze the resulting dataset. Performing multiple univariate tests …

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Thermodynamics Of Dna Binding By Dna Polymerase I And Reca Recombinase From Deinococcus Radiodurans, Jaycob Dalton Warfel Jan 2014

Thermodynamics Of Dna Binding By Dna Polymerase I And Reca Recombinase From Deinococcus Radiodurans, Jaycob Dalton Warfel

LSU Doctoral Dissertations

Deinococcus radiodurans has a significantly more robust DNA repair response than Escherichia coli, which helps it survive high amounts of oxidative stress. D. radiodurans DNA Polymerase I (DrPolI) and RecA protein (DrRecA) play essential parts in this DNA repair capability. Structural stability studies of the DrPolI large fragment (Klendra) and examination of the DNA binding characteristics of Klendra and RecA are presented herein. In the absence of cofactors DrRecA binds to dsDNA more than 20 fold tighter than EcRecA, and binds ssDNA up to 9 fold tighter. Binding to dsDNA in the absence of cofactor presumably monitors DNA end binding. …

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Characterization Of A Water Soluble, Non-Ionic, Helical Poly(Α-Amino Acid), Wayne Huberty Jan 2014

Characterization Of A Water Soluble, Non-Ionic, Helical Poly(Α-Amino Acid), Wayne Huberty

LSU Doctoral Dissertations

A water soluble, non-ionic, rodlike polymer, PEGL, was synthesized and characterized in efforts to synthesize a novel model polymer to study stiff polymers in solution. The rodlike system is likely stiff due to a high relative percent helicity in water up to 50 °C, measured by circular dichroism, the observation of liquid crystalline domains in water, and from the slope measured from conformation plots supplied by GPC/MALS; however, it also apparent the system is aggregating in both a 2 mM azide solution and a buffer (200 mM NaNO3 + 20 mM NaH2PO4 + 2 mM NaN3), in corroboration of negative …

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Untangling Earth System Responses Recorded In Sulfate's Sulfur And Oxygen Isotopes At The Dawn Of Multicellular Life And Today, Bryan Alan Killingsworth Jan 2014

Untangling Earth System Responses Recorded In Sulfate's Sulfur And Oxygen Isotopes At The Dawn Of Multicellular Life And Today, Bryan Alan Killingsworth

LSU Doctoral Dissertations

Major Earth system perturbations in the deep past and today are recorded in sulfate sulfur and oxygen isotopes, as examined here in three cases. (1) Sedimentary sulfate record of the “Marinoan Oxygen-17 Depletion” (MOSD) event, implies ultra-high CO2 atmosphere at ~635 Ma after global glaciation. MOSD duration is constrained by correlating its most complete record to radiometric dates. Barium sulfate layers in South China sediments show the MOSD in lower layers but persistently absent up section. Carbon-13 correlation locates the MOSD within dated intervals from other sites, yielding a 0 - 0.99 Myr duration. Thus, sedimentary constraint on this non-steady-state …

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Enhancement Of Gulf Killifish, Fundulus Grandis, Fitness And Reproduction, Joshua Thomas Patterson Jan 2014

Enhancement Of Gulf Killifish, Fundulus Grandis, Fitness And Reproduction, Joshua Thomas Patterson

LSU Doctoral Dissertations

Gulf killifish, Fundulus grandis, shows promise for commercial development as a marine baitfish species. Significant markets for F. grandis already exist throughout the Gulf Coast, with the vast majority of supply coming from wild-harvests, which can be hampered by seasonal availability and inconsistent fish health and size. The genus Fundulus also represents an important group of model vertebrates for biological study. A recent review paper described this genus as the premier teleost model for environmental biology. New information generated as a result of the work contained in this dissertation may be more broadly applicable to sister species of F. grandis, …

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Interpreting Blackness: A Phenomenological Case Study Of African American Young Adult Literature, Deleon Miriam Wilson Jan 2014

Interpreting Blackness: A Phenomenological Case Study Of African American Young Adult Literature, Deleon Miriam Wilson

LSU Doctoral Dissertations

This dissertation examines how Black students formulate representation of African American in African American young adult literature. It also explores the effects of race in reference to how characters are portrayed, publishing industry practices, and how African American literature is taught in the secondary classroom. In this study, I utilized qualitative research methods, specifically, phenomenology to place meaning on any occurrences cited by the participants. Data was collected using an initial interview, and a follow up interview to help clarify data collected from participants. This dissertation argues that race and gender constructs how characters are portrayed in African American young …

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Coworking: Crafting Lives Alongside Each Other, Claire Frances Taylor Jan 2014

Coworking: Crafting Lives Alongside Each Other, Claire Frances Taylor

LSU Doctoral Dissertations

Coworking is a form of alternative work arrangement in which communities of individuals share common office and work space but are most often employed by different employers within different fields/industries (Foertsch, 2011). Despite its growing prevalence, coworking is nearly absent from the organizational literature. The present mixed methods study introduced and defined the construct of extent of coworking. Extent of coworking is conceptually defined in this research as the degree to which an individual spends her/his workweek coworking. Qualitative literature review was conducted to establish this construct, and qualitative interview data provided support for the definition. Using job crafting and …

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Assessment Of Bermudagrass (Cynodon Dactylon) Biotypes And Bermudagrass Interference With Sugarcane (Saccharum Spp. Hybrids, Dexter Paul Fontenot Jan 2014

Assessment Of Bermudagrass (Cynodon Dactylon) Biotypes And Bermudagrass Interference With Sugarcane (Saccharum Spp. Hybrids, Dexter Paul Fontenot

LSU Doctoral Dissertations

Bermudagrass (Cynodon dactylon L. Pers.) collected from 17 Louisiana sugarcane (Saccharum spp. hybrids) fields and two sites outside sugarcane-growing area was evaluated for genetic diversity, growth characteristics and response to glyphosate. Random Amplified Polymorphic DNA (RAPD) genetic analysis and Jacard’s similarity coefficient, a dedrogram, based on unweighted pair group mean average (UPGMA) identified two cluster groups based on presence of common alleles. Bermudagrass considered most aggressive in establishment rate based on ground cover, plant height, and biomass production included the biotypes A (St. Martinville) and Q (Port Allen) in cluster A and R (St. Gabriel) in cluster B. Biotypes J …

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Outer Surface Lipoprotein Layer Homeostasis And Gene Regulation In Borrelia Burgdorferi, Poonam Dadhwal Jan 2014

Outer Surface Lipoprotein Layer Homeostasis And Gene Regulation In Borrelia Burgdorferi, Poonam Dadhwal

LSU Doctoral Dissertations

The outer surface lipoprotein (osp) layer forms an interface between the internal and the external environment of the Lyme disease spirochete, Borrelia burgdorferi. The homeostatic maintenance of the osp layer effectuates adaptation of B. burgdorferi as it gets transmitted from the tick vector to a mammalian host and vice-versa. However, the regulation of the outer surface lipoproteins (osps) is still a conundrum for borrelia scientists. Part of this dissertation inquires about the homeostatic maintenance of the osp layer. We found that the deletion of the dominantly expressed tick phase osp, OspA, induces expression of two other osps. OspD, and BBJ41. …

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Presidential Profiles: Race, Leadership Orientation, And Effectiveness, Jerry M. Whitmore Jr. Jan 2014

Presidential Profiles: Race, Leadership Orientation, And Effectiveness, Jerry M. Whitmore Jr.

LSU Doctoral Dissertations

This dissertation study examined racial differences in leadership orientation and effectiveness at United States four year, public colleges and universities as self-perceived and as perceived by presidents, as a means to contribute to the literature on race leadership orientation and effectiveness. The quantitative study design is to determine significant relationships among University or College Presidents or Chancellors (UCPC) pertaining to their leadership frames and effectiveness using (Bolman and Deal 1991a, 1991b, 2003) four-frame leadership theory and Quinn (1988) competing values model. The study attempts to understand any distinct observations that may be present. This study will not be an attempt …

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Polonium-210 Dynamics In The Northern Gulf Of Mexico, Patrick Robert Jones Jan 2014

Polonium-210 Dynamics In The Northern Gulf Of Mexico, Patrick Robert Jones

LSU Master's Theses

Polonium-210 (t1/2=138 d) is the most common among the 33 known radioisotopes of Polonium found in the natural environment. It is produced by the radioactive decay of its long-lived grandparent Lead-210(t1/2=22.3 d) via Bismuth-210 (t1/2=5.012 d) and forms as part of the natural Uranium-238 decay series. The primary hazard associated with Polonium-210 is its radioactivity, as an alpha particle emitter. Marine organisms receive their maximum radioactive dose in the natural environment from Polonium-210. Polonium has been known to bioaccumulate in the marine food web and can be potentially harmful to humans via the intake of certain marine organisms. Thus it …

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Mechanisms Of Innate Immunity In Polymicrobial Sepsis, Liliang Jin Jan 2014

Mechanisms Of Innate Immunity In Polymicrobial Sepsis, Liliang Jin

LSU Doctoral Dissertations

Severe bacterial sepsis leads to a pro-inflammatory condition that can manifest as septic shock, multiple organ failure, and death. Neutrophils are critical for the rapid elimination of bacteria, however, the role of neutrophil chemoattractant CXCL1, pattern recognition receptors (PRRs)- NLR protein 3 (NLRP3) and alcohol in bacterial clearance during sepsis remains elusive. We demonstrate that CXCL1 plays a pivotal role in mediating host defense to polymicrobial sepsis following cecal ligation and puncture (CLP) in gene-deficient mice. CXCL1 appears to be essential for restricting bacterial outgrowth and preventing multiple organ failure and death in mice. Moreover, CXCL1 is essential for neutrophil …

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Robotics And Inquiry: Addressing The Impact On Student Understanding Of Physics Concepts (Force And Motion) From Select Rural Louisiana Elementary Students Through Robotics Instruction Immersed Within The 5e Learning Cycle Model, Bianca Rodrigue Deliberto Jan 2014

Robotics And Inquiry: Addressing The Impact On Student Understanding Of Physics Concepts (Force And Motion) From Select Rural Louisiana Elementary Students Through Robotics Instruction Immersed Within The 5e Learning Cycle Model, Bianca Rodrigue Deliberto

LSU Doctoral Dissertations

This embedded mixed methods study investigates the development of rural elementary students’ conceptual understanding of force and motion as a result of the implementation of robotics instruction immersed within a 5E Learning Cycle Model lessons. Three treatment groups and one controlled comparison group (n=96) participated in pretests and posttests (Science Series Assessment 1, Russell and McGuigan, 2001) the day the activities were completed as well as one week after the completion of the treatment, 5E Learning Cycle Model lessons and draw and tell interviews. Prior to the intervention, the Iowa Test of Basic Skills stanine scores were grouped into three …

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Characteristics Of Dental Follicle Stem Cells And Their Potential Application For Treatment Of Craniofacial Defects, Maryam Rezai Rad Jan 2014

Characteristics Of Dental Follicle Stem Cells And Their Potential Application For Treatment Of Craniofacial Defects, Maryam Rezai Rad

LSU Doctoral Dissertations

Utilization of patient-specific stem cells in regenerative medicine provides a novel treatment approach for diseases and disorders. Embryonic stem cells and induced pluripotent stem cells can differentiate into any cells found within the body; however, ethical, technical and safety concerns have to be overcome before they can be used in clinics. Patient-specific stem cells can be isolated from adult tissues with no ethical, fewer technical, and safety concerns. Obtaining tissues for stem cell isolation usually requires invasive procedures, but impacted teeth are often extracted in the clinics and can be used for isolation of dental follicle stem cells (DFSCs). The …

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Web-Based Computational Tools For Studying Plant Biodiversity, Timothy Mark Jones Jan 2014

Web-Based Computational Tools For Studying Plant Biodiversity, Timothy Mark Jones

LSU Doctoral Dissertations

Large scale plant biodiversity bioinformatics projects are now making taxonomic datasets available at a frenetic pace via the World Wide Web (WWW). While these new resources provide the fundamental textual and visual backbone of expert level knowledge, their information structure often impedes the development of derivative works for identification. But when this information is rearranged from a traditional format, questions can be asked of the data that were previously thought to be unanswerable. The difficulty in transforming this ‘big-data’ is manifold: how to deliver it rapidly to researchers across the world while providing visualizations of data that encompass these large …

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Applications Of Cfd Simulations On Studying The Multiphase Flow In Microfluidic Devices, Yuehao Li Jan 2014

Applications Of Cfd Simulations On Studying The Multiphase Flow In Microfluidic Devices, Yuehao Li

LSU Doctoral Dissertations

Microfluidics has been extensively investigated as a unique platform to synthesize nanoparticles with desired properties, e.g., size and morphology. Compared to the conventional batch reactors, wet-chemical synthesis using continuous flow microfluidics provides better control over addition of reagents, heat and mass transfer, and reproducibility. Recently, millifluidics has emerged as an alternative since it offers similar control as microfluidics. With its dimensions scaled up to millimeter size, millifluidics saves fabrication efforts and potentially paves the way for industrial applications. Good designs and manipulations of microfluidic and millifluidic devices rely on solid understanding of fluid dynamics. Fluid flow plays an important role …

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Microfluidic And Nanofluidic Devices - Mixed Scale Systems For Bioanalytical Applications, Michael David Vincent Jan 2014

Microfluidic And Nanofluidic Devices - Mixed Scale Systems For Bioanalytical Applications, Michael David Vincent

LSU Doctoral Dissertations

Developments in the field of microfluidics and nanofluidics allow an experimenter to employ new analytical techniques. One direction in which the field is moving towards is developing new devices and or instruments on the smallest scale possible. One way in which this can be achieved is by using a combination of top-down and bottom-up technologies. Some of these top-down techniques have been used in other fields such as the use of photolithography to fabricate semiconductors. Photolithography is a top-down method used to create features normally on the micrometer scale, but in order to create nanometer size features another top-down method …

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The Efficacy Of Interactive Journaling® In Reducing Alcohol Use And Alcohol-Related Problems Among Mandated College Student Drinkers, Steven Lee Proctor Jan 2014

The Efficacy Of Interactive Journaling® In Reducing Alcohol Use And Alcohol-Related Problems Among Mandated College Student Drinkers, Steven Lee Proctor

LSU Doctoral Dissertations

Alcohol use and alcohol-related problems remain serious public health and safety concerns on United States college campuses. Considerable research has amassed to support the efficacy of the Alcohol Skills Training Program (ASTP), most notably the Brief Assessment and Screening Intervention for College Students, in reducing alcohol use and alcohol-related problems among mandated and voluntary college student drinkers. The most recent outgrowth of the ASTP curriculum, CHOICES About Alcohol: A Brief Alcohol Abuse Prevention Program, is a self-guided, experiential writing process which utilizes Interactive Journaling®. The present study sought to evaluate the efficacy of CHOICES in reducing alcohol use and alcohol-related …

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Explicit Instruction Of Scientific Explanation And Argument In An Undergraduate Introductory Biology Laboratory Course Using The Claim, Evidence And Reasoning Framework, Rosemary Eva Becker Jan 2014

Explicit Instruction Of Scientific Explanation And Argument In An Undergraduate Introductory Biology Laboratory Course Using The Claim, Evidence And Reasoning Framework, Rosemary Eva Becker

LSU Doctoral Dissertations

Scientific explanation and scientific argument are important aspects of science inquiry and science education. Though students of all ages find construction of written scientific explanations and arguments difficult, explicit instruction in scientific explanation and argument can improve student ability. This quantitative research study used a non-equivalent comparison group design to investigate the affect of explicit instruction of scientific explanation and argument in an undergraduate introductory biology laboratory course, using a college level appropriate modified CER Framework (McNeill et al., 2006). This study compared students receiving explicit instruction in scientific explanation and argument with students taking traditionally-designed biology laboratory courses. Students …

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Construct Validity Of The Autism Spectrum Disorders-Child Version (Asd-C) And The Child Behavior Checklist (Cbcl), Kimberly Tureck Sheffield Jan 2014

Construct Validity Of The Autism Spectrum Disorders-Child Version (Asd-C) And The Child Behavior Checklist (Cbcl), Kimberly Tureck Sheffield

LSU Doctoral Dissertations

Previous researchers have demonstrated that Autism Spectrum Disorder (ASD) is related to increased prevalence of other psychological disorders. Comorbid disorders increase the difficulties in socialization and communication already experienced by children with ASD. These symptoms often require additional intervention techniques and should be identified as early as possible to beget the best prognosis. The Autism Spectrum Disorders – Child Version (ASD-C) is an informant based assessment battery specifically designed to measure symptoms of ASD, comorbid disorders, and challenging behavior in children with ASD. The reliability and validity of this assessment has been established in previous studies, but there is no …

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Characterization Of A Novel Negative Regulator Of Toxoflavin Production, Ntpr, In The Plant Pathogen Burkholderia Glumae That Causes Bacterial Panicle Blight Of Rice, Rebecca Ann Melanson Jan 2014

Characterization Of A Novel Negative Regulator Of Toxoflavin Production, Ntpr, In The Plant Pathogen Burkholderia Glumae That Causes Bacterial Panicle Blight Of Rice, Rebecca Ann Melanson

LSU Doctoral Dissertations

Burkholderia glumae is the major causal agent of bacterial panicle blight of rice, a disease that can cause significant yield losses. This bacterial pathogen produces a number of virulence factors that contribute to disease development. The phytotoxin, toxoflavin is required for full virulence and is the most important virulence factor in B. glumae. The known regulatory cascade of toxoflavin production involves the TofI-TofR quorum-sensing system, the transcriptional activators ToxJ and ToxR, and the toxoflavin biosynthesis and transport genes. Transposon mutagenesis of toxoflavin-producing B. glumae strains generated a number of mutants with increased toxoflavin production. Several of these mutants contained …

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