Digital Commons Network^™

An Assessment Of Government Capacity Building To Restrict The Marketing Of Unhealthy Food And Non-Alcoholic Beverage Products To Children In The Region Of The Americas, Sofía Rincón-Gallardo Patiño, Fabio Da Silva Gomes, Steven Constantinou, Robin Lemaire, Valisa E. Hedrick, Elena L. Serrano, Vivica I. Kraak

Faculty Publications

No abstract provided.

Analytical Determination Of Mitochondrial Function Of Excised Solid Tumor Homogenates, Elizabeth R.M. Zunica, Christopher L. Axelrod, L. Anne Gilmore, John P. Kirwan

Division of Basic Science Faculty Publications

Mitochondria are essential to the onset and progression of cancer through energy production, reactive oxygen species regulation, and macromolecule synthesis. Genetic and functional adaptations of mitochondria to the tumor environment drive proliferative and metastatic potential. The advent of DNA and RNA sequencing removed critical barriers to the evaluation of genetic mediators of tumorigenesis. However, to date, methodological approaches to evaluate tumor mitochondrial function remain elusive and require technical proficiency limiting the feasibility, ultimately diminishing diagnostic and prognostic value in both experimental and clinical settings. Here, we outline a simple and rapid method to quantify rates of oxidative phosphorylation (OXPHOS) and …

Initial Weight Change And Long-Term Changes In Weight And Compensation During Supervised Exercise Training, James L. Dorling, Christoph Höchsmann, S. Nicole Fearnbach, John W. Apolzan, Daniel S. Hsia, Neil M. Johannsen, Tim I.M.S. Church, Corby K. Martin

Clinical Research Faculty Publications

Introduction Our primary aim was to investigate the association between initial weight change and longer-term changes in weight and compensation (predicted weight loss-observed weight loss) during exercise. As secondary aims, we investigated if initial weight change was related to change in cardiometabolic risk markers and energy balance modulators. Methods Two 6-month randomized controlled exercise trials conducted in individuals with overweight or obesity were analyzed (study 1, n = 312; study 2, n = 102). In both studies, participants in an exercise condition (4 kcal·kg-1·wk-1 [KKW], 8 KKW, 12 KKW, or 20 KKW) were split into tertiles based on percent weight …

Network Analysis To Identify Critical Links For Relief Activities During Extreme Weather Events, Kate Kyung Hyun, Stephen P. Mattingly Ph.D, Mehrdad Arabi

Publications

As one of the principal lifeline systems, transportation networks are crucial for evacuation and delivering essential resources and services during the response and recovery phases of extreme weather events and must remain intact to enhance regional resiliency. The conventional evaluation measures that estimate the vulnerability or criticality of road network based on travel time or link volumes do not capture the community impacts due to disruptions. This study seeks to develop a framework to evaluate road network infrastructure criticality during extreme weather events by introducing measures that evaluate the vulnerability of roads users, rather than the physical aspects of link …

Biocontrol Of Wireworms (Coleoptera: Elateridae) Using Entomopathogenic Nematodes: The Impact Of Infected Host Cadaver Application And Soil Characteristics, Ramandeep Kaur Sandhi, David Shapiro-Ilan, Michael Ivie, Gadi V.P. Reddy

Faculty Publications

Wireworms have become a significant menace to cereals in the Northern Great Plains. Therefore, research toward developing effective control methods such as biological control with entomopathogenic nematodes (EPNs) is warranted. Two strains, each of two EPN species, Steinernema carpocapsae (Weiser) and Steinernema riobrave Cabanillas, Poinar, and Raulston in the form of infected Galleria mellonella (L.) cadavers were evaluated against wireworms in field and greenhouse. In field experiments, none of the four EPN strains were found effective against wireworms. However, in the greenhouse test, three of the strains, S. carpocapsae (All and Cxrd) or S. riobrave (355) applied in cadavers killed …

Lipids Activate Skeletal Muscle Mitochondrial Fission And Quality Control Networks To Induce Insulin Resistance In Humans, Christopher L. Axelrod, Ciaran E. Fealy, Melissa L. Erickson, Gangarao Davuluri, Hisashi Fujioka, Wagner S. Dantas, Emily Huang, Kathryn Pergola, Jacob T. Mey, William T. King, Anny Mulya, Daniel Hsia, Bartolome Burguera, Bernard Tandler, Charles L. Hoppel, John P. Kirwan

Division of Basic Science Faculty Publications

Background and aims: A diminution in skeletal muscle mitochondrial function due to ectopic lipid accumulation and excess nutrient intake is thought to contribute to insulin resistance and the development of type 2 diabetes. However, the functional integrity of mitochondria in insulin-resistant skeletal muscle remains highly controversial. Methods: 19 healthy adults (age:28.4 ± 1.7 years; BMI:22.7 ± 0.3 kg/m2) received an overnight intravenous infusion of lipid (20% Intralipid) or saline followed by a hyperinsulinemic-euglycemic clamp to assess insulin sensitivity using a randomized crossover design. Skeletal muscle biopsies were obtained after the overnight lipid infusion to evaluate activation of mitochondrial dynamics proteins, …

Honeycomb Structures In Magnetic Fields, Becker Simon, Rui Han, Svetlana Jitomirskaya, Maciej Zworski

Faculty Publications

We consider the nearest-neighbour tight binding model of the honeycomb lattice in magnetic fields and discover surprizing new analytical results that fully explain fractal spectra and experimentally observed asymmetries in the density of states of molecular graphene.We describe a fractal Cantor spectrum for irrational magnetic flux through a honeycomb, and establish the existence of zero energy Dirac cones for each rational flux with fully explicit estimates on the cone angle. Our results give a substantially more refined description of subtleties in the de Haas-van Alphen and quantum Hall effects, and provide the first quantitative bounds on transport coefficients for the …

Physical Activity Behaviours In Adolescence: Current Evidence And Opportunities For Intervention, Esther M.F. Van Sluijs, Ulf Ekelund, Inacio Crochemore-Silva, Regina Guthold, Amy Ha, David Lubans, Adewale L. Oyeyemi, Ding Ding, Peter T. Katzmarzyk

Population and Public Health Science Faculty Publications

Young people aged 10–24 years constitute 24% of the world's population; investing in their health could yield a triple benefit—eg, today, into adulthood, and for the next generation. However, in physical activity research, this life stage is poorly understood, with the evidence dominated by research in younger adolescents (aged 10–14 years), school settings, and high-income countries. Globally, 80% of adolescents are insufficiently active, and many adolescents engage in 2 h or more daily recreational screen time. In this Series paper, we present the most up-to-date global evidence on adolescent physical activity and discuss directions for identifying potential solutions to enhance …

Online-Delivered Group And Personal Exercise Programs To Support Low Active Older Adults' Mental Health During The Covid-19 Pandemic: Randomized Controlled Trial, Mark R. Beauchamp, Ryan M. Hulteen, Geralyn R. Ruissen, Yan Liu, Ryan E. Rhodes, Colin M. Wierts, Katrina J. Waldhauser, Samantha H. Harden, Eli Puterman

Faculty Publications

Background: In response to the COVID-19 pandemic, experts in mental health science emphasized the importance of developing and evaluating approaches to support and maintain the mental health of older adults.

Objective: The aim of this study was to assess whether a group-based exercise program relative to a personal exercise program (both delivered online) and waitlist control (WLC) can improve the psychological health of previously low active older adults during the early stages of the COVID-19 pandemic.

Methods: The Seniors COVID-19 Pandemic and Exercise (SCOPE) trial was a 3-arm, parallel randomized controlled trial conducted between May and September 2020 in which …

Determinants Of Fine-Scale Heterogeneity In Mosquito-Borne Virus Systems, Elizabeth Handly Mayton

LSU Doctoral Dissertations

ABSTRACT

Arthropod-borne viruses (arboviruses) are the etiological agents of much morbidity and mortality, especially in low- and middle-income countries. Many of these viruses are spread and maintained by mosquitoes, particularly the urban mosquito Aedes aegypti. Zika virus (ZIKV) is responsible for one of the largest vector-borne disease outbreaks in the past decade, affecting millions in Central and South America including a wave of microcephaly among newborns. Mayaro virus (MAYV) is a mosquito-borne virus endemic to South America and is predicted to become an emergent public health threat. Describing the vector-virus transmission systems are critical for understanding the potential spread …

Challenging The Illusion Of Diversity: A New Theoretical Paradigm Towards Newsroom Inclusion., Paromita Saha

LSU Doctoral Dissertations

Over the past forty years, the news industry has attempted to diversify the racial composition of their newsrooms from the perspective of representing their markets better mirroring best business practices in the industry. The statistics show that an affirmative style of recruitment has produced minimal, superficial results with a high turnover of minority journalists who are hardly promoted to editorial positions, as well as skewed representations of minority racial groups. The literature indicates that hegemonic ideological forces and the White male professional ethos behind journalism is not conducive to minority journalists producing meaningful changes to news content. My study indicates …

Evaluation Of Cell Concentration And Viability By Impedance Spectroscopy On Microfluidic Devices, Jason Eades

LSU Master's Theses

This document describes two distinct platforms that implement electrochemical impedance spectroscopy (EIS) within microfluidic devices for rapid, label-free cell analysis. Each study provides proof-of-concept evaluations of these devices for cell counting and viability analysis applications to mitigate some of the challenges associated with conventional methods. Chapter one includes background information on each version of EIS selected and motivations for the studies conducted. Chapter two describes the design and fabrication of a modular, reusable microfluidic device. Additionally, the methodology for and results from the application of this platform for the measurement of zebrafish sperm cell concentrations are presented. Chapter three describes …

Improving Inhibitory Control In A Kindergarten Classroom, Kaitlyn Theresa Lambert

LSU Master's Theses

BACKGROUND: Executive function skills are critical in early development, as they “form the foundation for children’s ability to self-regulate” (McLelland et al., 2016, p. 242). Inhibitory control, one component of executive function, is the ability to suppress or inhibit responses to distractions when completing a task (Nguyen & Duncan, 2019). OBJECTIVE: The purpose of this study was to improve children’s inhibitory control in the classroom through age-appropriate games, which promote controlling emotions and remaining on task. METHODS: Three target children were observed in the classroom they attend with their regular teacher. Baseline data revealed that the target children needed improvement …

Informing Viral Surveillance Of Oropouche Virus: An Emerging Arbovirus, Christine E. Walsh

LSU Master's Theses

Arboviruses are viruses transmitted by hematophagous arthropod vectors. Many of these viruses pose a threat to human health. While some infections may be asymptomatic, others may produce febrile illness, or manifest in life threatening conditions. Symptomatic diagnosis of patients with generalized febrile illness can be confounded due to the various diseases that present clinically in the same manner, and a lack of available diagnostic tests. Surveillance efforts can be used to create awareness about the prevalence of neglected tropical arthropod-borne pathogens, such as Oropouche virus (OROV), and inform preparedness measures for disease outbreaks (SURVEILLANCE SENTENCE). OROV is an arbovirus and …

Sulfur And Sage, John Swincinski

LSU Master's Theses

Sulfur and Sage is a body of abstract paintings created out of memories of time spent immersed in the wilderness of the Rocky Mountains and the Yellowstone Caldera during the summer of 2020. The paintings reflect specific places, experiences, and insights, which occurred as I sought solitude by returning to the one place where I feel most at peace with the universe – the woods.

Each painting is augmented by a written vignette, describing the occurrence it is based on. Should the viewer choose to include these short stories as they encounter the artwork, they provide the jumping off point …

What Are People Searching During The Pandemic? Exploring The Determinants Of Public Interest Through Google Searches, Justin Weng

LSU Master's Theses

In 2020, COVID-19 became a serious health concern to people worldwide, regardless of their socioeconomic status, cultural characteristics, or political freedom. Even though this unprecedented crisis was the most impactful and dominant issue in 2020, COVID-19 was not the only issue that people were interested in. This study explored if and how national characteristics influenced global public interests during the COVID-19 pandemic in 2020. Using popular online searches in 23 nations, this study categorized global public interests into two ways: COVID-19 related and non-COVID-19 related issues, with four and 13 sub-categories, respectively. Results showed that people in higher political freedom …

Lewd And Lascivious: French Quarter Clean-Up Campaigns By Business And Civic Organizations In 1950s New Orleans, Fernando Rodriguez

LSU Doctoral Dissertations

On January 1, 1950 Nashville tourist Robert Dunn died after a long night of drinking on Bourbon St. An investigation ruled the death a homicide. That determination marked the beginning of a decade-long effort by prominent New Orleans residents, civic, and business organizations to pressure Mayor deLesseps S. Morrison and the New Orleans Police Department (NOPD) to rid the French Quarter of those deemed “undesirable.” Reformers aimed to make the French Quarter friendly for residents, tourists and businessmen who attended conventions. Throughout the 1950s, three committees were created that were comprised of local residents and businessmen to investigate the issues …

To Be Read: The Educational Opportunities Of Booktube, Anita M. Dubroc

LSU Doctoral Dissertations

BookTube, a literary-focused subcommunity of YouTube, is a network of readers where educational theory and literary theory collide. BookTube is known for delving out book reviews and showing off book hauls, but its content creators, known as booktubers, do much more than display walls of colorful hardback books. The BookTube community is a networked knowledge community (Sorensen & Mara, 2014) in which informal knowledge is valued as much as the formal knowledge attained in classrooms. Online book reviews on sites such as Amazon and Goodreads have demonstrated the waning influence of professional book reviewers because now any reader take on …

A Semiotic Approach To Visual Analysis Of Dress: Symbolic Communication Of Clothing Color, Cut, And Composition Through The French Film Costumes Of Anaïs Romand, Leigh Danielle Honeycutt

LSU Master's Theses

This study examines the communicative role of clothing in film. Using the skillful costume canvas of French designer Anaïs Romand, we explore the possible visual messages and potential cultural and linguistic meanings that clothing choice conveys. This analysis uses Roland Barthes’ Theory of the “Five Codes” from his book S/Z as well as psychological sources about color analysis as its methodological basis. Images from each of the five period piece films were chosen and analyzed using semiotics. The costumes in all five films chosen for analysis were designed under the direction of Anaïs Romand and were all either nominated for, …

Optimization Of Mechanical Properties At The Infarct Border Zone, Kaushik Sunder

LSU Master's Theses

A myocardial infarction (MI) occurs every 39 seconds in the United States. As of 2016, an estimated 550,000 new and 200,000 recurrent episodes of myocardial infarction (MI) occur each year in the United States was. Infarction is often distinguished by a considerable decrease in wall thickness and an increase in heart size or left ventricular volume. This behavior happens when there is a prolonged lack of blood flow, usually due to damage or clotting, which causes cardiomyocytes to die (CMs). The development of non-contractile infarct scarring is the primary pathophysiology of MI. While the infarct scar prevents myocardial rupture during …

Understanding Potassium Toxicity Stress Responses Of The Extremophyte Schrenkiella Parvula Using Systems Biology Approaches, Pramod Pantha

LSU Doctoral Dissertations

Schrenkiella parvula is an extremophyte model closely related to Arabidopsis thaliana and Brassica crops. Its natural habitat includes shores of saline lakes in the Irano-Turanian region. It has adapted to grow in soils rich in multiple salts including Na⁺ and K⁺. I have investigated the genetic basis for high K⁺ tolerance in plants using S. parvula as a stress tolerant model compared to the premier plant model, Arabidopsis thaliana which is highly sensitive to salt stresses using physiological, ionomic, transcriptomic, and metabolomic approaches. Under high K⁺ stress, root system architecture changes significantly compared to control …

#Blackgirlmathmagic: A Mixed Methods Study Examining African American Girls In Standardized Mathematicstesting, Rakeema Thomas Toussaint

LSU Doctoral Dissertations

Black women have been making successful strides in mathematics for decades; however, they continue to be underrepresented in mathematics and other STEM fields. According to Young et al. (2017), Black girls and women perform lower in mathematics than all other racial gender groups except for Black males. Considering the stakes for Black girls and women in mathematics, this study sought to address this group's challenges early in their secondary education experiences, focusing on standardized testing.

The purpose of this explanatory-sequential mixed-methods study was to determine how different mathematics item types impacted the performance of African American girls, especially multiple-select multiple-choice …

Operating The Digital Space In The Age Of Protest Participation, Kyle Stanley

LSU Master's Theses

This study examines young African American adults’ usage of social media and other digital spaces as tools to build community given the rise in protest participation in North American (U. S.) society while at the height of a global health pandemic. Since early adulthood is a time where African Americans are most active online, this study will examine how and why those African Americans are turning to digital spaces to find social connections. Racism and racial injustice are two of the most pressing issues in the African American community, and it is clear that it can be an emotionally laborious …

Initial Investigations Into Tools For Phytoremediation Of Lead From Urban And Suburban Landscapes, Michael Taylor Bryant

LSU Master's Theses

Lead is a pervasive and ongoing problem in the landscape, especially in urban and suburban areas where historic use of tetraethyl lead gasoline and leaded paint has increased background amounts to dangerous levels. One method to solve this problem is the use of hyperaccumulator plant species, capable of concentrating over 1000 ppm Pb into their tissues. This is a slow process, even with hyperaccumulators, so the use of amendments to improve Pb solubility has gained popularity, though with mixed results. This study examined Trachelospermum asiaticum, Ardisia japonica, and Ophiopogon japonicus, three common landscape groundcovers used in Louisiana, …

Telling A New Story Of Obsessive-Compulsive Disorder: Narrative Versus Argument Communication Effects On Ocd Stigma And Recognition, Ashlyn Blaire Soileau

LSU Master's Theses

This study utilizes narrative persuasion theory to investigate the effect of narrative and argument appeals when communicating about Obsessive-Compulsive Disorder (OCD) to the public. This study tested stigma and recognition of OCD with a 2x2 factorial between-subject design using advertisement types and gender as the independent variables. Findings showed that communication type and gender do not affect OCD recognition. However, a univariate ANCOVA analysis, when controlling for empathy and OCD experience. The results revealed that gender and ad type did affect OCD stigma. Also, women showed lower stigma scores for social restrictiveness when seeing the narrative appeal when contrasted with …

Enhanced Oil Recovery In Tight Rocks Using The “Slot-Drill” Completion, Hassan Amer

LSU Master's Theses

Enhanced oil recovery (EOR) is essential in shale/tight formations because primary recovery typically produces less than 10% of the original hydrocarbon in-place (OHIP). This work presents a novel “slot-drill” EOR technology, which involves injecting gas through a horizontal fracture that is cut into the formation near the top of the reservoir (using a tensioned abrasive cutting cable mounted to the drillstring) and producing oil from a second slot-drilled horizontal fracture near the bottom of the reservoir.

The dusty-gas diffusion model was implemented in a compositional simulator to account for the diffusion mechanism expected during the injection of gases in this …

Late Embryogenesis Abundant Proteins And Mitochondrial Membranes From An Animal Extremophile: Insights Into Severe Water Stress, John Marcus Anderson

LSU Doctoral Dissertations

This dissertation focuses on two major topics germane to mechanisms by which animals tolerate extreme water stress. First, the impact of transgenic expression of late embryogenesis abundant proteins (LEA) on water stress tolerance of the fruit fly Drosophila melanogaster was investigated. The overall aim was to extend current understanding of the protective properties of LEA proteins documented with isolated cells to a desiccation-sensitive organism during exposure to drying and hyperosmotic stress. Four lines of D. melanogaster were created that expressed transgenes encoding selected LEA proteins originally identified in embryos of the extremophile Artemia franciscana. After 80% tissue water loss, …

Interfacial Engineering Of Bipolar Junctions For Electrochemical Processes, Subarna Kole

LSU Doctoral Dissertations

Water and energy scarcity are two of the main problems the world is facing today. A number of industrial processes like chemical manufacturing plants, energy production, electricity generation are heavily dependent on availability of a reliable source of water. Similarly, every step of water collection, treatment, and distribution, is an energy intensive process. The efficient use of electrochemical devices can help tackle some of these problems. Bipolar membranes (BPMs) have historically been deployed in electrodialysis setups for mineral acid and base production. The need to have disparate pH environments in electrochemical cells, and prevent species crossover, have motivated researchers to …

The Rougarou Concerto And Initial Observations Of The Flex Ensemble, Thomas Wilson

LSU Doctoral Dissertations

The purpose of this dissertation is to examine the immediate impact of the coronavirus pandemic through a composer’s lens. It will examine the impact through a variety of means, considerably: interviews of those with first-hand experiences, analyses of prominent adaptable works, and self-analysis of how my own process adapted to meet the moment.

After discovering the Composers Repertoire Initiative and being commissioned to write a concerto by Eduard Teregulov, I wrote a cello concert. The central chapter features the Rougarou Concerto, a cello concerto with accompanying flex ensemble, written for Eduard Teregulov. The work was written over ten months …

Covid-19 Pandemic: A Mixed-Methods Study Investigation Of A Health Science System Faculty's Adaptations To An Online (Non-Traditional) Teaching Environment For Health Professional Students, Daryl Philip Lofaso

LSU Doctoral Dissertations

The purpose of this mixed method study was to explore the transition to an online educational platform for future health professional students at a southern health sciences system due to Severe Acute Respiratory Syndrome (SARS-CoV-2) virus. The majority of health professional students received their education via face-to-face prior to the pandemic. The pandemic altered their traditional pedagogical method of face-to-face to online instruction. The health professional school faculty offer the best instruction in a lecture hall not on a computer screen using Zoom. This study was designed to analyze how the faculty adapted in moving to an online instructional method, …