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Dactyls Reveal Evolutionary Patterns In Decapod Crustaceans, Jeffrey Guy Agnew

LSU Doctoral Dissertations

Because of their high preservation potential and uses in foraging and defense, decapod crustacean dactyls (movable fingers of claws) are potentially excellent test subjects for an ongoing debate concerning the relative importance of top-down (predators) and bottom-up (prey) controls on morphologic diversification and evolution. The utility of dactyls for inferring evolutionary patterns were evaluated using living and subfossil xanthoid crabs sampled from the southeast U.S. Atlantic and Gulf of Mexico coasts, and were used to: (1) distinguish the roles of selection and constraint on dactyl morphology through allometric and shape comparisons in the context of the crab’s phylogenetic relationships and …

Fabrication Of Micro Bumps For Micro Scale Thermal Management, Ajay Ashok Kardak

LSU Master's Theses

Cryopreservation is storage of biological systems at ultra low temperatures for a prolonged duration; such that they can be thawed and restored to the same living state. It is important to understand the behavior of cells when they are subjected to subzero temperatures. Research in this area has shown the occurrence of two main biophysical events; cellular dehydration and intracellular ice formation. Current techniques for characterizing the dehydration in cells as part of a tissue are not adequate for studying intracellular ice formation in tissues. An integrated device consisting of an array of thermal sensors (microthermocouples) and actuators (microthermoelectric coolers) …

Three Papers On The Behavior Modeling Of The Shrimp Fishermen In The Gulf Of Mexico, Tao Ran

LSU Doctoral Dissertations

The overall goal of this research is to empirically analyze shrimp fishermen behavior to help improve the management of the Gulf of Mexico shrimp fleet. Given that optimal management requires consideration of more than the net benefits derived from shrimp harvesting, this research also seeks to provide an empirical framework that would allow future investigators to measure benefits lost through bycatch-related management actions. This paper expands on previous fishing behavior literature by focusing on two of the most important short-run decisions confronting Gulf of Mexico shrimp fishermen (where to fish and how long to fish). A better understanding of these …

Sex-Specific Feeding Rates And Provisioning Of Fruit To Nestling Bell's Vireo, Greg H. Farley

The Prairie Naturalist

Provisioning of fruit to nestlings and possible sex-specific differences in feeding rate have not been reported for Bell's vireo (Vireo bellii; Brown 1993). While studying nesting ecology of Bell's vireo on Konza Prairie Biological Station, Geary and Riley counties, Kansas, I quantified feeding rate by sex and food type delivered to nestlings. Sex was determined by capturing adults with mist-nets and inspecting for a cloacal protuberance, as well as conducting behavioral observations of uniquely-marked individuals. Males sing regularly while moving around territories, as well as during incubation (Nolan 1960). I assigned "female" to the individual in these socially …

Zoological Label As Literary Form, Victor Fet

Biological Sciences Faculty Research

Nabokov’s work is seen through the unique concept of zoological labels and their language. A label, written by a young naturalist, is a concentrated source of information, detail, and “naming the unnamed”; it reflects three Aristotelian unities (place, time, action).

Telemetric Assessment Of Stereotypical Motor Movements In Children With Autism Spectrum Disorder, Matthew S. Goodwin

Open Access Dissertations

Stereotypical motor movements are one of the most common and least understood behaviors occurring in individuals with Autism Spectrum Disorder (ASD). When severe, engagement in these behaviors can lead to social stigmatization and complicate social interaction. Moreover, if a stereotypical motor movement becomes a dominant behavior in an individual's repertoire, it can interfere with the performance of established skills and acquisition of new skills, and may lead to self-injurious behavior. Stereotypical motor movements are complex and thought to serve a multiplicity of functions. However, problems with traditional methods for measuring stereotypical motor movements have made it difficult to determine when …

Coping With Everyday Classism: Experiences Of Low-Income People In A Southeastern Rural Community, Susan Faye Ritz

Open Access Dissertations

The present research provided an in-depth look at experiencing and coping with everyday classism in a sample of low-income people in a mid-size southeastern rural United States community. The study employed a qualitative methodology consisting of semi-structured interviews and analyzing the collected data using Grounded Theory Method. Of 50 participants selected for an interview, 40 described experiences with classism, each discussing two incidents, for a total of 80 incidents shared. Seven of the remaining 10 participants felt that they had not experienced classism, but at the same time, they provided insight into one proactive coping strategy that they appeared to …

Applications Of Linear And Cyclic Peptides As Enzyme Inhibitors And Molecular Transporters, Guofeng Ye

Open Access Dissertations

The diversity of amino acids in peptides allows the design of different linear or cyclized compounds. Peptides can be designed to act as inhibitors, probes, or molecular transporters of other molecules. The objective of this dissertation research was to exploit the diversity of peptide structures and focused on developing linear and cyclic peptides as c-Src inhibitors and using the information derived from c-Src crystal structure to design novel peptide-based molecular transporters. A series of peptide analogues of Ac-CIYKYY were designed and synthesized to improve the inhibitory potency against active Src Linear peptide Ac-CIYKF(4-NO 2)Y (IC50 = 0.53 μM) and a …

Analysis Of Resonating Microcantilevers Operating In A Viscous Liquid Environment, Cyril Vančura, Isabelle Dufour, Stephen M. Heinrich, Fabien Josse, Andreas Hierlemann

Civil and Environmental Engineering Faculty Research and Publications

The characteristics of resonant cantilevers in viscous liquids are analyzed. Various rectangular cantilevers geometries are studied in pure water, glycerol and ethanol solutions of different concentrations, and the results are described in terms of the added displaced liquid mass and the liquid damping force for both, the resonance frequency and the quality factor (Q-factor). Experimental results using a set of magnetically actuated resonant cantilevers vibrating in the out-of-plane (“weak-axis bending”) mode are presented and compared to theoretical calculations. The importance of the study is in the use of resonant cantilevers as biochemical sensors in liquid environments.

Health Effects Of Nanoparticles, Claude Ostiguy, Brigitte Soucy, Gilles Lapointe, Catherine Woods, Luc Ménard, Mylène Trottier

Rapports de recherche scientifique

Cliquez ici pour la version française de ce rapport

Research in the nanoparticle (NP) and nanotechnology field is growing at a breathtaking pace. The reason is simple: the unique properties of NP will allow the development of products with unprecedented characteristics and opportunities in every field of human activity, and with tremendous economic impacts. It is currently anticipated that the number of exposed Quebec workers, not only in manufacturing these products but also in using and processing them, will increase over the next few years. Several products are already available commercially and some Quebec companies now have large-scale NP production …

The Forging Of Races: Race And Scripture In The Protestant Atlantic World, 1600-2000. By Colin Kidd, Armand L. Mauss

BYU Studies

Colin Kidd. The Forging of Races: Race and Scripture in the Protestant Atlantic World, 1600–2000. Cambridge, UK: Cambridge University Press, 2006.

Randomized Controlled Trial Evaluating Adeno-Momp And Momp Dna Vaccines Against Chlamydophila Psittaci Challenge In Cockatiels (Nymphicus Hollandicus), David Sanchez-Migallon Guzman

LSU Master's Theses

Chlamydophila psittaci causes severe disease in birds and humans, and important economical losses in the avian companion and poultry industry. Vaccines are the most cost-effective measure to control and help prevent infectious diseases, but to date there is no commercial vaccine available. A randomized clinical trial was conducted to assess the efficacy of two recombinant DNA vaccines against C. psittaci in Cockatiels (Nymphicus hollandicus). The first recombinant DNA vaccine has a gene encoding MOMP and the immunostimulant chitosan (MOMP DNA vaccine). The second recombinant DNA vaccine, contained the gene encoding MOMP that was vectored by a replication defective human adenovirus …

Spectrum, 2008, Northwestern College

Spectrum literary magazine

Literary journal

Dosimetry Intercomparison Using A 35-Kev X-Ray Synchrotron Beam, Scott Oves

LSU Master's Theses

Significance: Photon activated Auger electron therapy utilizes a keV-ranged, monoenergetic x-ray beam, and radiobiological and animal experiments studying this therapy require accurate dosimetry techniques. However, there exist few dosimetry protocols for low-energy x-ray beams. This research intended to use the CAMD synchrotron as a source of monochromatic, 35-keV x-rays and test dosimetry techniques of film and ion chamber. The hypothesis of my research was that depth-dose measured in a PMMA phantom using an air-equivalent ionization chamber and radiochromic film dosimeters in a PMMA phantom irradiated by a 35-keV, monochromatic x-ray beam will agree to within 5% of each other and …

Determination Of Ctv-To-Itv Margin For Free-Breathing Respiratory-Gated Treatments Using 4dct And The Novalis Exactrac Gating System With Implanted Fiducials, Jason Edward Matney

LSU Master's Theses

The purpose of this project was to investigate the interplay between gating window characteristics and target margin required to compensate for residual motion during the gating window. This project investigated the accuracy of ExacTrac and 4DCT imaging localizing an implanted coil at various phases of respiration. Radiochromic film measured delivered dose patterns for selected gating intervals over a variety of respiratory patterns. In order to establish accurate dosimetry, this project implemented and tested an EBT radiochromic film dosimetry system. Film testing showed that the performance of a medical grade Vidar Dosimetry Pro radiographic film scanner and an Epson V700 Photo …

Concentration Of Phosphorylated Proteins Using Modified Pmma Microanalytical Devices, Jowell Guerra Bolivar

LSU Doctoral Dissertations

This work describes the application of PMMA-based microanalytical devices for the affinity-type preconcentration of posttranslational modified proteins (PTMs). The choice of poly(methyl methacrylate), PMMA, is based on its biocompatibility, its functional methyl ester group for potential modification, and its extensive applications to create biological microelectromechanical systems (BioMEMS). Developing methodologies for preconcentration of PTMs is important for cancer diagnosis due to PTMs’ influence in the regulatory mechanism underlying the early stage of apoptosis or regulated cell death. Towards this goal, nitroavidin which can reversibly binds to biotin (and biotinylated proteins), was prepared using reported procedure and was characterized using several techniques …

Novel Oncolytic Herpesviruses For Breast Cancer Treatment, Anna Israyelyan

LSU Doctoral Dissertations

Oncolytic herpes simplex virus type-1 (HSV-1) has shown great potential as an effective agent for cancer therapy ¨C oncolytic virotherapy. To enhance oncolytic capabilities of previously reported agents, new oncolytic and fusogenic HSV-1 OncSyn and OncdSyn viruses were constructed based on wild type HSV-1 (F) strain. To provide for safety and tumor selectivity, the viruses carried a large deletion including one of the two ¦Ã134.5 genes. The ¦Ã134.5 gene, a major neurovirulence factor, was replaced by a gene cassette constitutively expressing the red fluorescent protein. Homologous recombination was utilized to transfer the fusogenic gBsyn3 mutation to the viral genome to …

Detection Of Rare Tp53 And Kristen-Ras Mutational Frequencies In Human Sperm, Derek N. Cole

LSU Doctoral Dissertations

There is mounting evidence of impacts of single base substitutions in both somatic and inherited genetic diseases. However, the occurrence of single base mutations in the germline and gametes has previously only been by conjecture and assumption. There is a need for understanding the risk of offspring inheriting small intragenic mutations, the frequencies at which these mutations are present in germ cells, and the impact that these inherited mutations may have son the predisposition to somatic disease during one’s lifetime. The present study attempts to establish baselines of mutational frequencies in two well characterized genes in human tissues, and demonstrate …

Distributions And Associations Of Single Nucleotide Polymorphisms In The Leptin Gene Of Bos Taurus And Bos Indicus Cattle, Douglas Henry Fischer, Jr

LSU Master's Theses

In recent years, the use of genetic markers has become more and more prevalent in beef breeding programs. This research focused on four previously identified single nucleotide polymorphisms in a leptin gene on chromosome 4 of beef cows. The SNP were E2FB, T945M, UA1, and UA2. Beef cows used in this research were maintained at the Louisiana State University AgCenter Central Research Station. Cows consisted of purebred Bos tauras and Bos indicus cattle as well as crossbreds. The objectives were to estimate genotypic and allelic frequencies for each SNP and to determine the influence of cow breed type, cow age, …

Durable And Reusable Antimicrobial Textiles, Leila Elizabeth Bonin

LSU Master's Theses

Antimicrobial textiles are a large research focus in the textile industry. There is an apparent need for creating reusable and durable antimicrobial textiles. Most of the textiles with antimicrobial properties effective against Staphylococcus aureus are disposable. To address the issue, two types of biopolymer solutions were created in a USDA lab. Both solutions displayed antimicrobial properties. A medium weight, plain weave cotton sheeting was used as the test fabric. Samples of the sheeting were cut, treated, and tested to determine their efficacy as antimicrobial textiles. The tests performed included tensile deformation, bending, shearing, compression, surface friction, surface roughness, and treatment …

Failure-Awareness And Dynamic Adaptation In Data Scheduling, Mehmet Balman

LSU Master's Theses

Over the years, scientific applications have become more complex and more data intensive. Especially large scale simulations and scientific experiments in areas such as physics, biology, astronomy and earth sciences demand highly distributed resources to satisfy excessive computational requirements. Increasing data requirements and the distributed nature of the resources made I/O the major bottleneck for end-to-end application performance. Existing systems fail to address issues such as reliability, scalability, and efficiency in dealing with wide area data access, retrieval and processing. In this study, we explore data-intensive distributed computing and study challenges in data placement in distributed environments. After analyzing different …

A Comparison Of Feeding And Mealtime Problems In Intellectually Disabled Adults With And Without Autism, Jill Cherie Fodstad

LSU Master's Theses

Due to the dearth of information categorically describing feeding behaviors in those with autism spectrum disorders, the goal of this research is to examine the nature of feeding difficulties in adults with intellectual disabilities (ID) and Autism Spectrum Disorders (ASD). Feeding and mealtime behavior problems are an area of concern due to their impact on an individual’s daily functioning, as well as the potential for causing severe medical conditions (e.g., poor nutrition, choking, aspiration) that may ultimately lead to death. Due to the importance of this topic for proper diagnosis and treatment planning, a better understanding of these behaviors in …

Micropropagation Through Somatic Embryogenesis And Cotyledonary Nodal Culture In Sea Oats (Uniola Paniculata L.), Diptimayee Sahoo

LSU Master's Theses

Uniola paniculata, commonly known as sea oats, is a C4 perennial grass capable of stabilizing sand dunes. Although this species is extensively used in beach restoration projects, production and availability of sea oats seedlings is seriously constrained due to disappearance of the natural stands. Other limitations are poor seed production, seed dormancy, and low seedling survival. With increasing interest in dune restoration, an efficient micropropagation technique is essential to generate sea oats seedlings in mass scale. In this study an efficient, rapid and reproducible plant regeneration system was successfully established for sea oats through somatic embryogenesis and cotyledonary nodal culture. …

Moderately-Rapid Assessment Of Alkaline Desiccation Environmental Systems, David Alan Bates

LSU Doctoral Dissertations

A moderately-rapid assessment tool was developed to analyze the waterless desiccation compost toilet investigated in a rural Mexican setting. Over 100 social factors were identified along with the applicable technical factors that influenced the low acceptability of the toilets. A 4-point rating scale was developed to increase the ability and speed of analyzing both the social and technical data. The treatment process was an alkaline-desiccation process with mean pH values of 8.2 ± sd 1.1 and water content of 18.3% ± sd 9.9, which resulted in mean fecal coliform values of 15.0 MPN/g ± sd 31.8, drastically lower than the …

An Analysis Of Marine Protected Areas Legislation In The Caribbean Lesser Antilles, Barry James Bleichner

LSU Master's Theses

Historically, marine resources and ecosystems were believed to be limitless and exploitation of those resources occurred with little regard to future consequences. Recent studies suggests that this belief is misplaced, as research indicates that many of these marine resources face extinction if protective measures are not implemented soon. Marine protected areas, or MPAs have garnered increasing attention as a means to effectively protect and conserve marine resources. Establishment and management of marine protected areas typically require implementing legislation in order to provide a legal basis for enforcement of MPA rules and regulations. The intent of this research was to determine …

Evaluation Of Management Practices And Remediation Techniques For Improving Water Quality In Agricultural Systems, Theophilus Kene Udeigwe

LSU Doctoral Dissertations

Surface water quality impairment is often associated with agricultural activities. In this study, the effects of three sugarcane residue management techniques, namely burning (BR), shredding (SR), and retention (RR) of residues on: surface water quality, carbon export, and chemical composition of organic matter in the runoff sediments were characterized. Separate studies were conducted to evaluate predictive relationships for biochemical oxygen demand (BOD) in agricultural effluents, and the effectiveness of bauxite residues (red and brown muds) in reducing soluble nutrient/pollutant release from manure-impacted soils. All the selected water quality parameters were determined using EPA-approved analytical methods. The RR technique exported lower …

Postcolonial Writing In Louisiana: Surpassing The Role Of French Traditionalism In Alfred Mercier's L'Habitation Saint-Ybars, Mary Florence Cashell

LSU Master's Theses

This thesis explores the roles of French patriarchal ideologies of the Enlightenment and exoticism in Alfred Mercier’s novel, L’habitation Saint-Ybars. His novel portrays the antebellum Creole plantation as a hierarchy of strict gender roles similar to those that Enlightenment philosophy espoused. I use the family in Bernardin de Saint-Pierre’s classic, Paul et Virginie, as one example of such a hierarchy. There are also, however, several instances where Mercier departs from the paternalistic norm. I interpret Mercier’s moving away from this model to be a declaration of a unique Louisianian identity.

Retrotransposon Mediated Genomic Variation In The Human And Chimpanzee Lineages, Jungnam Lee

LSU Doctoral Dissertations

LINE-1 (Long INterspersed Element-1 or L1) and Alu elements are important sources of structural variation in primate genomes because they are highly active retrotransposons with copy numbers of ~520,000 and >1.2 million within the human genome, respectively. Although the bulk of these elements have resided in their respective host genomes for a long time, and have thus accumulated random mutations, overall these elements retain high levels of sequence identity among themselves. The presence of many nearly-identical retrotransposons located close to each other (e.g., Alu-Alu or L1-L1 pairs) disposes their host genomes to unequal homologous DNA recombination events that generate genomic …

Assessing Clinical Trial Eligibility With Logic Expression Queries, Deryle W. Lonsdale, C. Tutison, Craig G. Parker, David W. Embley

Faculty Publications

This paper introduces a system that processes clinical trials using a combination of natural language processing and database techniques. We process web-based clinical trial recruitment pages to extract semantic information reflecting eligibility criteria for potential participants. From this information we then formulate a query that can match criteria against medical data in patient records. The resulting system reflects a tight coupling of web-based information extraction, natural language processing, medical informatic approaches to clinical knowledge representation, and large-scale database technologies. We present an evaluation of the system and future directions for further system development.

Stochastic And Copula Models For Credit Derivatives, Chao Meng

LSU Doctoral Dissertations

We prove results relating to the exit time of a stochastic process from a region in N-dimensional space. We compute certain stochastic integrals involving the exit time. Taking a Gaussian copula model for the hitting time behavior, we prove several results on the sensitivity of quantities connected with the hitting times to parameters of the model, as well as the large-N behavior. We discuss the relationship of these results to certain credit derivative instruments. Relevant simulations are presented.