Experimental, Analytical, And Numerical Evaluation Of The Mechanical Properties Of The Brain Tissue, Aref Samadidooki

LSU Doctoral Dissertations

A true understanding of the mechanisms behind most of the brain diseases is still out of reach. For several years, the interest of scientists has been focused on the genetic and biological causes, however, recent studies unraveled the importance of the biomechanics of the brain growth, folding, impact resistance, and deformation on its pathological conditions. While, a wide range of different methods have been used for characterization of the mechanical properties of the brain at the tissue level, the obtained results from different studies are extremely scattered and sometimes in contrast to one another. Since the brain tissue is extremely …

Focality In Prospective Memory: A Thorough Examination Of Cue Specificity And Task-Appropriateness, Bethany Alice Lyon

LSU Doctoral Dissertations

Prospective memory (PM) refers to memory for future intentions (e.g. remembering to press a button when you see an animal word). Researchers classify PM intentions in the laboratory as focal or nonfocal primarily in two ways. One way, task-appropriateness, refers to how the processing for the intention relates to the processing required for an ongoing task; the PM intention and the ongoing task either match in processing (TAP; focal) or mismatch in processing (TIP; nonfocal). The second way researchers classify focality is based on cue specificity, with the PM task either being specific (focal) or general (nonfocal). Resolving this ambiguity …

Ten Weeks Of High-Intensity Interval Walk Training Is Associated With Reduced Disease Activity And Improved Innate Immune Function In Older Adults With Rheumatoid Arthritis: A Pilot Study, David B. Bartlett, Leslie H. Willis, Cris A. Slentz, Andrew Hoselton, Leslie Kelly, Janet L. Huebner, Virginia B. Kraus, Jennifer Moss, Michael J. Muehlbauer, Guillaume Spielmann, William E. Kraus, Janet M. Lord, Kim M. Huffman

Faculty Publications

Background: Rheumatoid arthritis (RA) is a chronic inflammatory disease in which adults have significant joint issues leading to poor health. Poor health is compounded by many factors, including exercise avoidance and increased risk of opportunistic infection. Exercise training can improve the health of patients with RA and potentially improve immune function; however, information on the effects of high-intensity interval training (HIIT) in RA is limited. We sought to determine whether 10 weeks of a walking-based HIIT program would be associated with health improvements as measured by disease activity and aerobic fitness. Further, we assessed whether HIIT was associated with improved …

Visualization And Quantification Of Cancer-Associated Enzymes With Fluorescent Small-Molecule Substrate Probes, Zhenhua Shen

LSU Doctoral Dissertations

Fluorescence imaging can be used both as a tool to diagnose diseases and guide treatment in clinical settings, and as a technique to monitor dynamic events or biological species in basic research. Therefore, there is a great need for the development of a multitude of fluorescent probes that can be incorporated with fluorescence imaging techniques to track and report endogenous enzymes with high specificity and selectivity. In contrast to always-on and targeted always-on fluorescent probes that continually emit light, activity-based substrate probes either emit low numbers of photons or are completely quenched. They can be converted to highly fluorescent reporters …

Catharsis, Matthew Barton

LSU Master's Theses

Catharsis is a series of eight works that highlight the spiritual and emotional benefits I receive from repetitive manual action. Pulling loosely from Catholic iconography and practices, my work discusses the personal solutions I’ve found to the adverse effects that organized religion can have on the psyche. Using both ceramic and found object sculptures, I aim to discuss both the internal and external results of this catharsis.

Evaluation Of Microbial Safety And Quality Of Louisiana Strawberries After Flooding, Shifa Shiraz

LSU Master's Theses

Rainfall and flooding have impacted the strawberry industry in Louisiana. Floodwater is an ideal medium for microbiological growth and may cause contamination of soil, agricultural water, and fresh produce with foodborne pathogens. This research aimed to evaluate the microbial safety and quality of strawberries after flooding. Three strains of generic Escherichia coli were used to establish a baseline population of approximately 10⁶ CFU/L (high contamination) and 10² CFU/L (low contamination) in floodwater. Five raised beds were filled with water to simulate a flooding event. Simulated floodwater was mixed with cow manure and spiked with generic E. coli then …

Glyphosate In Soils: Retention, Transport, And Effect Of Phosphate, Joshua Padilla

LSU Master's Theses

Glyphosate [N-(phosphonomethyl) glycine)] (GPS) is currently the most commonly used herbicide worldwide, and is generally considered as immobile in soils. However, numerous reports of the environmental occurrence of the herbicide coupled with recent evidence of human toxicity require further investigation as to the behavior of GPS in the soil environment. The objectives of this study were to quantify GPS sorption and mobility in two Louisiana agricultural soils with varying physiochemical properties; Commerce silt loam and Sharkey clay. Results of batch sorption studies indicated a high affinity of both soils for solvated GPS, with 24-hour Freundlich partitioning coefficients of 158 and …

Moments Of Metanoia, Mariah Anne Pickett

LSU Master's Theses

The term ‘metanoia’ embodies a climactic moment on the precipice—an instance where one is confronted by the tremendous threshold between youth and maturation. Moments of Metanoia explores these experiences that create an overwhelming division between the way things were and the way things will be. They are the crystallizing moments of metamorphosis or the shattering moments of undoing. As evidenced by their thematic appearances in ancient mythology, these dramatic episodes of transformation have existed as a part of the human condition for millennia. By using Greek mythology to explore metanoia, the universality of the human experience is emphasized. Each piece …

A Comparison Of Causal Inference Methods And Their Application In Big Data Analytics, Xuan Wang

LSU Doctoral Dissertations

With the rise of Big Data analytics, the new field of causal inference (Pearl, 2009) has received more attention in business research fields such as Accounting (Lawrence, Minutti-Meza, & Zhang, 2011) and Marketing (Manganaris, Bhasin, Reid, & Hermiz Keith, 2010). Traditional statistics focuses on correlation which may lead to misleading conclusions because the estimates can be severely biased even when data sets are large. The objective of causal inference is to obtain estimates from observational data that are unbiased and can thus be interpreted as causal. This study provides a systematic comparison of the performance of four causal inference methods …

Evolving Performance Practice Of Debussy's Piano Preludes, Vivian Buchanan

LSU Master's Theses

Between 1910 and 1912 Claude Debussy recorded twelve of his solo piano works for the player piano company Welte-Mignon. Although Debussy frequently instructed his students to play his music exactly as written, his own recordings are rife with artistic liberties and interpretive freedom. Interestingly, many of the interpretive gestures that Debussy employs in these recordings are consistent with playing techniques utilized by French Baroque keyboardists. This paper will situate Debussy’s own performance in this Baroque playing style. I will first discuss the recording technology used by Welte-Mignon to establish the reliability of these recordings. By studying harpsichord manuals, I will …

Altar To Uncertainty, Kelly Stombaugh

LSU Master's Theses

ABSTRACT

I have always been in awe of great storytellers. Like an alchemist, the masterful storyteller can take the most mundane of tales and transmute it into an enrapturing experience. The best of these, however, are the stories which seem very otherworldly but, in the end, can reveal deep and relatable truths to the listener.

For this exhibition, “Altar to Uncertainty,” I have undertaken the creation of a single book and story which surrounds and visually extends itself through printed etchings upon the walls to tell a transformative tale of redemption through trauma, hopelessness and loss.

My intention with this …

Role Of Neutrophils In The Modulation Of Host Responses To Human Respiratory Pneumovirus Infection, Nagarjuna Reddy Cheemarla

LSU Doctoral Dissertations

Neutrophils are the most abundant leukocytes (50% to 70%) in humans and are the first immune cell population recruited to the sites of infection. They are known to act as the first line of innate immune defense against invading pathogens, and more recently, to playing a crucial role in orchestrating adaptive immune responses. The role of neutrophils in the respiratory viral infections till date remains unclear and controversial. Previous studies demonstrated both beneficial as well as pathogenic role for neutrophils in respiratory viral infections, especially influenza.

Previous findings reported an early and high influx of neutrophils into the airways early …

Survival And Inactivation Of Salmonella Enterica And Human Norovirus On Consumer Contact Surfaces, Dorra Simmons

LSU Doctoral Dissertations

Salmonella enterica and human norovirus (HuNoV) are the leading cause of bacterial and viral gastroenteritis worldwide, respectively. One of the most important transmission routes of these pathogens is contaminated surfaces. In this study, we investigated the survival and the disinfection of Salmonella enterica serovar Typhimurium (S. Typhimurium) and HuNoV on selected consumer contact surfaces.

In the case of S. Typhimurium, formica laminate, stainless steel, and plastic cutting board surfaces were inoculated with different microbial loads of cells collected at log (6 h), stationary (24 h), or LTS (14 days) phases. The disinfection efficacy of two disinfectants (sodium hypochlorite or …

Species Richness And Phylogenetic Diversity Of Native And Non-Native Species Respond Differently To Area And Environmental Factors, Daijiang Li, William B. Monahan, Benjamin Baiser

Faculty Publications

© 2018 John Wiley & Sons Ltd Aim: To test whether native and non-native species have similar diversity–area relationships (species–area relationships [SARs] and phylogenetic diversity–area relationships [PDARs]) and whether they respond similarly to environmental variables. Location: United States. Methods: Using lists of native and non-native species as well as environmental variables for >250 US national parks, we compared SARs and PDARs of native and non-native species to test whether they respond similarly to environmental conditions. We then used multiple regressions involving climate, land cover and anthropogenic variables to further explore underlying predictors of diversity for plants and birds in US …

Intraspecific Variation In Indirect Plant–Soil Feedbacks Influences A Wetland Plant Invasion, Warwick J. Allen, Laura A. Meyerson, Andrew J. Flick, James T. Cronin

Faculty Publications

© 2018 by the Ecological Society of America Plant–soil feedbacks (PSFs) influence plant competition via direct interactions with pathogens and mutualists or indirectly via apparent competition/mutualisms (i.e., spillover to co-occurring plants) and soil legacy effects. It is currently unknown how intraspecific variation in PSFs interacts with the environment (e.g., nutrient availability) to influence competition between native and invasive plants. We conducted a fully crossed multi-factor greenhouse experiment to determine the effects of Phragmites australis rhizosphere soil biota, interspecific competition, and nutrient availability on biomass of replicate populations from one native and two invasive lineages of common reed (P. australis) and …

Generating Dna Sequence Data With Limited Resources For Molecular Biology: Lessons From A Barcoding Project In Indonesia, Gillian H. Dean, Rani Asmarayani, Marlina Ardiyani, Yessi Santika, Teguh Triono, Sarah Mathews, Campbell O. Webb

Faculty Publications

Applications in Plant Sciences is published by Wiley Periodicals, Inc. on behalf of the Botanical Society of America The advent of the DNA sequencing age has led to a revolution in biology. The rapid and cost-effective generation of high-quality sequence data has transformed many fields, including those focused on discovering species and surveying biodiversity, monitoring movement of biological materials, forensic biology, and disease diagnostics. There is a need to build capacity to generate useful sequence data in countries with limited historical access to laboratory resources, so that researchers can benefit from the advantages offered by these data. Commonly used molecular …

Making Epidermal Bladder Cells Bigger: Developmental-And Salinity-Induced Endopolyploidy In A Model Halophyte, Bronwyn J. Barkla, Timothy Rhodes, Kieu Nga T. Tran, Chathura Wijesinghege, John C. Larkin, Maheshi Dassanayake

Faculty Publications

© 2018 American Society of Plant Biologists. All rights reserved. Endopolyploidy occurs when DNA replication takes place without subsequent mitotic nuclear division, resulting in cell-specific ploidy levels within tissues. In plants, endopolyploidy plays an important role in sustaining growth and development, but only a few studies have demonstrated a role in abiotic stress response. In this study, we investigated the function of ploidy level and nuclear and cell size in leaf expansion throughout development and tracked cell type-specific ploidy in the halophyte Mesembryanthemum crystallinum. In addition to developmental endopolyploidy, we examined the effects of salinity stress on ploidy level. We …

Using Hydrogen Stable Isotope Ratios To Trace The Geographic Origin Of The Population Of Bactrocera Dorsalis (Diptera: Tephritidae) Trapped In Northern China, Zihua Zhao, Zhenglong Lu, Gadi V.P. Reddy, Shuo Zhao, Guanghui Lin, Jianyun Ding, Jiajiao Wu, Zhihong Li

Faculty Publications

The oriental fruit fly, Bactrocera dorsalis Hendel (Diptera: Tephritidae), is a generalist feeder that is known to successfully feed and breed on a variety of fruits and vegetables in the tropical and subtropical zones of Asia. Recently, the northward extension of B. dorsalis has been reported, and this geographic range increase relates to both climate changes and the rapid development of domestic and international trade and travel. However, it has not been possible to determine the origin of this pest, which is trapped in north China. In this study, traps baited with the sex attractant methyl eugenol were used to …

Changes To Extender, Cryoprotective Medium, And In Vitro Fertilization Improve Zebrafish Sperm Cryopreservation, Jennifer L. Matthews, Joy M. Murphy, Carrie Carmichael, Huiping Yang, Terrence Tiersch, Monte Westerfield, Zoltan M. Varga

Faculty Publications

Sperm cryopreservation is a highly efficient method for preserving genetic resources. It extends the reproductive period of males and significantly reduces costs normally associated with maintenance of live animal colonies. However, previous zebrafish (Danio rerio) cryopreservation methods have produced variable outcomes and low post-thaw fertilization rates. To improve post-thaw fertilization rates after cryopreservation, we developed a new extender and cryoprotective medium (CPM), introduced quality assessment (QA), determined the optimal cooling rate, and improved the post-thaw in vitro fertilization process. We found that the hypertonic extender E400 preserved motility of sperm held on ice for at least 6 h. We implemented …

Estimating Waterfowl Carrying Capacity At Local Scales: A Case Study From Edwin B. Forsythe National Wildlife Refuge, New Jersey, Kevin M. Ringelman, Christopher K. Williams, Paul M. Castelli, Mason L. Sieges, Rebecca A. Longenecker, Theodore C. Nichols, Stephen D. Earsom

Faculty Publications

The management of wintering North American waterfowl is based on the premise that the amount of foraging habitat can limit populations. To estimate carrying capacity of winter habitats, managers use bioenergetic models to quantify energy (food) availability and energy demand, and use results as planning tools to meet regional conservation objectives. Regional models provide only coarse estimates of carrying capacity because habitat area, habitat energy values, and temporal trends in population-level demand are difficult to quantify precisely at large scales. We took advantage of detailed data previously collected on wintering waterfowl at Edwin B. Forsythe National Wildlife Refuge and surrounding …

Home Is, Jodie Masterman

LSU Master's Theses

As an exploration of family and personal history, Home is. aims not only to chronicle my own experiences and memories, but to touch upon the innumerable definitions of the word “home”. The objects are rooted in personal reflection, but each one refers to an aspect of play, identity, love, loss, or regret, inherent within any family. Although they do serve as a blueprint of my life, they are meant to stand as moments shared by all.

Host And Symbionts In Pocillopora Damicornis Larvae Display Different Transcriptomic Responses To Ocean Acidification And Warming, Emily B. Rivest, Morgan W. Kelly, Melissa B. Debiasse, Gretchen E. Hofmann

Faculty Publications

© Copyright © 2018 Rivest, Kelly, DeBiasse and Hofmann. As global ocean change progresses, reef-building corals and their early life history stages will rely on physiological plasticity to tolerate new environmental conditions. Larvae from brooding coral species contain algal symbionts upon release, which assist with the energy requirements of dispersal and metamorphosis. Global ocean change threatens the success of larval dispersal and settlement by challenging the performance of the larvae and of the symbiosis. In this study, larvae of the reef-building coral Pocillopora damicornis were exposed to elevated pCO2 and temperature to examine the performance of the coral and its …

Experimental Evaluation Of Lignocellulosic Biomass Pyrolysis By Dielectric Heating And Thermocatalytic Upgrading Of Pyrolysis Vapors Via Iron-Doped Montmorillonite Clay Catalyst, Candice Raffaela Ellison

LSU Doctoral Dissertations

This work is an investigation of microwave-assisted biomass pyrolysis and thermocatalytic upgrading of pyrolysis vapors. In the first two chapters, the microwave susceptibility of mixtures of biomass with potential microwave absorbers are characterized by dielectric measurements at microwave frequencies. Dielectric constant and dielectric loss factor of biomass mixtures with char and biomass mixtures with bentonite are found to increase quadratically with increasing weight percent of char or bentonite.

Chapter 3 presents a finite element model, developed in COMSOL Multiphysics, comparing two waveguide applicator configurations for microwave processing using biomass as a model material. A standing wave configuration results in intense …

The Body In Pain / The Body In Ecstasy, Shannon Kenny

LSU Master's Theses

The Body in Pain / The Body in Ecstasy is a series of short lyric essays/extended poems which catalogue major discriminatory movements against disabled people in the 20th and 21st century, specifically in the United States. My work contains duel storylines, using these movements/categories of violence as frames for my own personal narrative, and connecting individual experience to larger historical structures. I do this to disrupt the notion that history is disconnected from the present, and showcase how humans are built by context, where personal and political are inexorably intertwined, and social development is tied to both the body and …

Effects Of Irradiation Dose On Sperm Production, Insemination, And Male Mating Possible Period In The Sweetpotato Weevil (Coleoptera: Brentidae), Satoshi Hiroyoshi, Takayuki Mistunaga, Tsuguo Kohama, Gadi V.P. Reddy

Faculty Publications

The sterile insect technique (SIT) has been used for the control or eradication of target insect pests. To successfully apply SIT, it is very important to clarify the effect of irradiation on male reproduction in the target pest, because their mating and spermiogenesis abilities affect the success of eradication program. The sweetpotato weevil, Cylas formicarius (Fabricius) (Coleoptera: Brentidae) is a notorious and worldwide pest of sweet potato. We investigated the effect of irradiation at five doses ranging from 0 (control) to 150 Gy on 9-d-old males. Survival rate of the control (no treatment) remained high from day 10 to 20 …

Designing A World: A Foray Into Scenography And Settling, Nathan David Ynacay

LSU Master's Theses

This work examines the design process as taught and what was practiced during Louisiana State University’s production of LMNOP the Muzical.

This will examine the design process as typically taught to undergraduate theatre students in all aspects of the discipline. The collaborative nature of the design process as taught to cast members, directors, and production team will be examined. After this examination, the design process for Louisiana State University’s production of LMNOP the Muzical will be used to compare and contrast the actual process with the theory of a collaborative design process. After, there will be an evaluation of …

Delivering Entrapped Lactobacillus Plantarum Ncimb 8826 With Cereal-Legume Infant-Weaning Food To Improve Children's Gastrointestinal Health, Emmanuel Kyereh

LSU Doctoral Dissertations

Diarrhea remains the second leading cause of death among children under five globally, about one in five children’s deaths are attributable to it. In recent years,’ probiotics have been used as an alternative therapy measure to manage the situation. A promising delivery method that entraps probiotics in infant formula may help prevent or reduce diarrhea. The overall objectives of this study were to deliver entrapped Lactobacillus Plantarum NCIMB 8826 with maize-legume fortified complementary weaning food to reduce diarrhea and improve the gut microbiota. Both in vitro and in vivo models were used in this study and a mouse (C57BL/6 mice …

Penny And Pound: Unpacking The Impacts Of The Fringe Economy On Household Economic Wellbeing, Zibei Chen

LSU Doctoral Dissertations

As an increasing number of American families cope with chronic financial stability, they have withdrawn from traditional financial systems and instead have chosen to participate in the fringe economy where alternative financial services (AFS) and products are costly. Although individuals’ lives have become highly financialized, the issue of financial inclusion is not well understood. Research to date primarily has focused on the banked and unbanked group, yet, evidence indicates the presence of a sizeable group of people who are underbanked. Using a posttest-only, nonequivalent control group quasi-experimental design, this dissertation study investigated banking statuses (unbanked, underbanked, and banked), and AFS …

Craft Production And Sociocultural Context: A Case Study Of Nasa Werregue Coiled Basketry In Colombia, Cindy Cordoba Arroyo

LSU Master's Theses

According to the Alliance of Artisan Enterprise from the Aspen Institute, the existence of the artisan enterprise is valuable for native communities since it creates jobs and preserves ancient techniques (Aspen Institute, 2012). The design and development of the Werregue (Astrocaryum Standleyanum) coiled basket is a source of income for indigenous communities in Colombia. This research uses a case study method which employed semi-structured interviews with fifteen skilled Nasa Werregue coiled basketmakers, to analyze the sociocultural characteristics, design, production, and market in Werregue coiled basketry in the Pacific region of Colombia within two research settings, Cali and the …

Multiple Origins Of Green Blood In New Guinea Lizards, Zachary B. Rodriguez, Susan L. Perkins, Christopher C. Austin

Faculty Publications

© 2018 The Authors. Several species of lizards from the megadiverse island of New Guinea have evolved green blood. An unusually high concentration of the green bile pigment biliverdin in the circulatory system of these lizards makes the blood, muscles, bones, tongue, and mucosal tissues bright green in color, eclipsing the crimson color from their red blood cells. This is a remarkable physiological feature because bile pigments are toxic physiological waste products of red blood cell catabolism and, when chronically elevated, cause jaundice in humans and all other vertebrates. Although these lizards offer a promising system to examine the evolution …