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Identifying Potential Antibiotic Uptake Mechanisms Of Streptococcus Pneumoniae, Yuri Laguna Terai
Identifying Potential Antibiotic Uptake Mechanisms Of Streptococcus Pneumoniae, Yuri Laguna Terai
Theses and Dissertations
Streptococcus pneumoniae (pneumococcus) is a commensal gram-positive colonizer of the human nasopharynx capable of causing diseases including otitis media, pneumonia, bacteremia, and meningitis. Although it is often a harmless colonizer, there is a high rate of mortality and morbidity among the immunocompromised, elderly, and young children. While these infections can often be treated with antibiotics, resistance to numerous antibiotics is increasing. Antibiotic resistance is a well-studied dilemma; however, little information is known of how bacteria take up certain antibiotics. Because most antibiotics cannot diffuse freely across the bacterial cell wall, we hypothesize that metabolite transport proteins participate in the uptake …
Adolescent Black Girls Anger And Aggression: What We Can Learn, Dawn Michelle Latiker
Adolescent Black Girls Anger And Aggression: What We Can Learn, Dawn Michelle Latiker
Theses and Dissertations
This case study aimed to understand adolescent Black girls’ response when becoming angry as related to verbal and physical aggression. The study focused on the triggers for anger of 7 Black girls, current strategies in place at the school to help manage their anger and aggression, and it sought to determine if the girls were able to recognize when they became angry. This information is of importance because the school suspension rate has increased for Black girls (Morris, 2013), and there are limited studies to help them manage their anger in order to feel accepted in schools, develop relationships in …
Determine The Composition Of Spoilage Bacteria And Their Dynamic Changes In Fresh Broiler Breast Meat During Refrigerated Storage, Dylan Joseph Lesak
Determine The Composition Of Spoilage Bacteria And Their Dynamic Changes In Fresh Broiler Breast Meat During Refrigerated Storage, Dylan Joseph Lesak
Theses and Dissertations
Traditional plating methods for bacterial enumeration can be limited, but the development of high-throughput DNA sequencing, such as Oxford Nanopore Technologies (ONT), can provide rapid and highly specific alternative for species-level identification. In this study, ONT amplicon sequencing was applied to fresh broiler breast meat to identify their bacterial composition and monitor their dynamic changes. The sequencing data were complemented by sensory panels, physicochemical analysis, and traditional plating methods. Over time, the bacterial diversity decreased within and across samples. By the end of shelf-life, Pseudomonas fragi, Pseudomonas lundesis, and Brochothrix thermosphacta became the most prevalent species. These bacteria were associated …
Waste Separation And Perceptions Of Environmental Health In A College Student Population, Anna Foster Nickels
Waste Separation And Perceptions Of Environmental Health In A College Student Population, Anna Foster Nickels
Theses and Dissertations
Florists must analyze business practices to become environmentally savvy. This study investigated whether the introduction of sustainable waste practices into a college floral design course influenced the student’s perception of environmental health. Two groups of students enrolled in the basic floral design course at Mississippi State University completed a survey on environmental health at the start and end of the semester. One group sorted their lab wastes into compostable and landfill material. Results indicated students who separated their floral waste maintained the same level of environmental concern throughout the testing period while the environmental health scores of those who did …
Dynamic Evolution Patterns Of Legislative Efforts On Forestry-Prescribed Fires, Welgamage Kalani Gayathri Perera
Dynamic Evolution Patterns Of Legislative Efforts On Forestry-Prescribed Fires, Welgamage Kalani Gayathri Perera
Theses and Dissertations
Forestry-prescribed fires have been essential for managing forestland and reducing the risk of catastrophic wildfires. However, the use of prescribed fires has also raised concerns about their potential environmental and social impacts, leading to the development of various statutes and regulations that govern their implementation. This study explores the evolving legislative efforts related to forestry prescribed fire in managing forests and reducing wildfire risks to assess their dynamic nature. Determinants behind these legislative patterns are examined using qualitative content analysis and a binary logit model. A total of 199 legislative bills related to forestry prescribed fire were identified from 1995 …
Exploring The Relationship Between Network Topology And Braess Paradox, Samuel Giftson Prabhakar
Exploring The Relationship Between Network Topology And Braess Paradox, Samuel Giftson Prabhakar
Theses and Dissertations
The Braess Paradox is a rare phenomenon that only occurs under specific scenarios. This project aims to study the probability of the Braess Paradox occurring in a Directed Weighted Graph while the number of edges increases. The graphs in the experiment are focused on studying the occurrence of the Braess Paradox in a directed weighted scale-free network while transforming it into a directed weighted complete graph. A simulation model is used to simulate the bots traveling through a network to detect the occurrence of the Braess Paradox, considering the increase of directed weighted edges. A Graph Neural Network (GNN) is …
Photocatalytic Disinfection Of Microbes In Water By Using Titanium Dioxide (Tio2) – Decorated Biochar, Aleria Story
Photocatalytic Disinfection Of Microbes In Water By Using Titanium Dioxide (Tio2) – Decorated Biochar, Aleria Story
Theses and Dissertations
Waterborne diseases, particularly those caused by microbial contamination such as Esche?richia coli (E. coli), present a global health challenge. This study centers on developing TiO2- decorated biochar nanocomposites, serving as a high-performance photocatalyst to combat E. coli contamination in water sources. TiO2 nanoparticles were synthesized using Flame Spray Pyrolysis (FSP) and deposited onto biochar. Structural and chemical properties were assessed using Scan?ning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Fourier-Transform Infrared (FT?IR) spectroscopy. The nanocomposites were tested for photocatalytic disinfection efficiency under UV–Vis irradiation and petrifilm imaging data indicate significant E. coli inactivation, highlight?ing the potential of these nanocomposites for …
Maternal And Paternal Appearance-Related Pressure And Body Esteem In Emerging Adults: Moderation By Self Compassion And Gender, Alligrace Story
Maternal And Paternal Appearance-Related Pressure And Body Esteem In Emerging Adults: Moderation By Self Compassion And Gender, Alligrace Story
Theses and Dissertations
Previous research has shown that appearance-related pressures from multiple sources can influence body esteem in emerging adults. Furthermore, research has shown that self-compassion and gender play a role in body image and the relation between sociocultural pressures and body esteem. Less research has examined how these variables interact in their association with body esteem in emerging adults. Thus, the current study sought to assess these interactions. Participants (N = 877; 492 women) were primarily White (78.9% for women and 76.4% for men) and ranged in age from 18 to 28 (M = 18.70 for women and 19.10 for men). Participants …
Choosing A Foundational Mathematics Course In Higher Education: How Is The Decision Made?, Heather Marie Wood
Choosing A Foundational Mathematics Course In Higher Education: How Is The Decision Made?, Heather Marie Wood
Theses and Dissertations
This qualitative research used the tenants of phenomenological research to structure a study that begins to identify faculty coordinator’s decision processes in selecting a general education mathematics course. In this study, I examined the question if a faculty member's experiences or beliefs had any influence on the decision process. The interviews occurred with faculty in degree programs grouped by the following a) no specific mathematics requirements (e.g., Humanities) degree programs, b) mathematics-light degree programs (e.g., Social Sciences) and c) mathematics-intensive degrees (e.g., Computer Science). The results of this study are varied but suggest that faculty tasked making decisions on mathematics …
Determining The Influence Of Broadcast Visuals And Messages On The Public’S Perceptions And Intent To Shelter In Tornado Warnings, Kristina Marie Balentine
Determining The Influence Of Broadcast Visuals And Messages On The Public’S Perceptions And Intent To Shelter In Tornado Warnings, Kristina Marie Balentine
Theses and Dissertations
Tornado warnings are life-threatening situations, and since the public uses television as the main source for tornado warning information, it is important to know how different visuals and messages are influencing the opinions and intentions of people. This research found that participants were more apt to say they would shelter if they were shown a tornado video than a radar video displaying storm-relative velocity or correlation coefficient, while seeing the tornado brought out a heightened level of anxiety and fear. Participants were most influenced by a call-to-action statement spoken by the meteorologist. Participants expressed negative feelings after being asked to …
Effectiveness Of Omeka Virtual Collections For Engaging Dunn-Seiler Museum’S Middle School Audiences, Amanda Mayo
Effectiveness Of Omeka Virtual Collections For Engaging Dunn-Seiler Museum’S Middle School Audiences, Amanda Mayo
Theses and Dissertations
This study assessed effectiveness of the Dunn-Seiler Museum's Omeka Virtual Platform by comparing student learning after virtual and hands-on informal outreach activities. The research, conducted in two Mississippi middle schools, focused on students’ (N=99) content gains and affective responses when engaging with fossil specimens that illustrate shifts in sea levels in Mississippi’s geological past. Data were categorized into three sections: content, affective response, and drawing portion. This mixed-methods research encompassed scoring student tests, coding student drawings, and identifying stable themes through teacher interviews. Analysis of pre-and post-tests for Control (hands-on) and Experimental (virtual specimens) groups revealed no significant differences in …
Collectors Versus Non-Collectors With Hoarding Symptoms, Caitlyn A. Nix
Collectors Versus Non-Collectors With Hoarding Symptoms, Caitlyn A. Nix
Theses and Dissertations
Research assessing the diagnostic criteria for hoarding disorder has firmly differentiated hoarding disorder from normative collecting. However, there has been no examination of non-normative collecting – that is, collectors that experience elevated hoarding symptoms. The current study utilized an online survey to explore differences between self-identified collectors (n = 140) and non-collectors (n = 169) in externalized hoarding symptoms, saving cognitions, and psychosocial functioning. Collectors reported higher general self-efficacy and higher need for control of items than non-collectors. Hoarding symptoms were not significantly different between collectors and non-collectors. These results suggest that identifying as a collector does not significantly change …
The Transnational Beat: Paramilitary Policing And America’S Associational Defense State, Ryan Reynolds
The Transnational Beat: Paramilitary Policing And America’S Associational Defense State, Ryan Reynolds
Theses and Dissertations
This study addresses the role of Cold War-era American law enforcement and intelligence institutions in shaping U.S. grand strategy and carrying out paramilitary operations. It examines American civil-military relations through the formal and informal relationships between the U.S. military, private organizations, and American law enforcement personnel within a framework I call “associational defense.” The concept provides a framework for observing and comprehending the existence of an American garrison state. While police institutions are civil institutions and not military organizations, law enforcement possessed a paramilitary mission throughout the Cold War and into the War on Drugs and the Global War on …
An Examination Of Teacher Candidates’ Planning Processes As They Seek To Integrate Technology Into Disciplinary Literacy Instruction, Kimberly O. Smith
An Examination Of Teacher Candidates’ Planning Processes As They Seek To Integrate Technology Into Disciplinary Literacy Instruction, Kimberly O. Smith
Theses and Dissertations
Demands of the workplace and society have made 21st-century knowledge and skills critical elements for success. As a result, the role of teachers in adequately preparing students to meet these demands continues to grow. National and state standards also call for increased attention to multimodal reading and writing. Today’s teachers must have the skills to effectively integrate technology into teaching and learning, supporting student development of digital reading and writing skills. Unfortunately, many teachers do not feel adequately prepared to do this (Hutchison & Reinking, 2011). Teacher education preparation programs must intentionally design programs to prepare teacher candidates for this …
A Day In The Life Of A Farm-Fluencer: Can Agriculturalists Change Public Perceptions Towards Agriculture By Using Social Media, Josey M. Webb
A Day In The Life Of A Farm-Fluencer: Can Agriculturalists Change Public Perceptions Towards Agriculture By Using Social Media, Josey M. Webb
Theses and Dissertations
As generations have moved away from the farm, the population has become less aware of the practices behind the agriculture industry. However, people are becoming interested in how their food is produced. Since most of the population has not received an agriculture education, they look towards social media as their source of information. Social media has become a platform for sharing opinions and knowledge on certain topics. It has also been studied the perceptions of others can be influenced by emotionalizing and repeating stories related to the topic. Farmers and ranchers are now sharing their knowledge and experiences regarding agriculture …
Developing Non-Invasive Molecular Sampling Methods For Effective Wildlife Monitoring, Daniela Adjaye
Developing Non-Invasive Molecular Sampling Methods For Effective Wildlife Monitoring, Daniela Adjaye
Theses and Dissertations
Monitoring of wildlife populations is critical to conservation and public health and provides crucial information necessary for effective decision-making and management. Effective wildlife monitoring requires effective and adaptable sampling methods that consider the researchers as well as species being monitored. This thesis assesses non-invasive sampling methods to 1) detect cryptic shrew species, and 2) identify bacteria of public health concern present in American black bear (Ursus americanus) fecal matter. Results from Chapter 2 demonstrate the potential for monitoring rare and sparsely distributed small mammals using soil sourced environmental DNA with targeted sampling (e.g., cover objects for shrews). Chapter 3 demonstrates …
The Evaluation Of Italian Ryegrass Control And Rice (Oryza Sativa) Response Using Fall-Applied Residual Herbicides, Taylor D. Burrell Ii
The Evaluation Of Italian Ryegrass Control And Rice (Oryza Sativa) Response Using Fall-Applied Residual Herbicides, Taylor D. Burrell Ii
Theses and Dissertations
Italian ryegrass (Lolium perenne) is one of the most troublesome weeds of rice in Mississippi. Its resistance to multiple modes of action has made it more difficult to control in recent years. The most effective and economical management strategy to control Italian ryegrass is fall-applied residual herbicides; however, the most effective products are not labeled for use in the fall prior to rice seeding. Therefore, research was conducted in Stoneville, MS, to evaluate the effect of fall-applied residual herbicides on rice growth and development. Acetochlor should not be applied in fall targeting Italian ryegrass in fields where rice is scheduled …
Jackson, Mississippi Food Security Efforts: Understanding The Current And Future Foodscape, Natalie Rosemary Bowers
Jackson, Mississippi Food Security Efforts: Understanding The Current And Future Foodscape, Natalie Rosemary Bowers
Theses and Dissertations
In Jackson, Mississippi, basic needs like access to food and water are critical issues. This research reveals efforts and actors working to improve food access within Jackson’s foodscape. This study uses interview and mapping methodologies, which unearth the challenges and opportunities for food efforts in Jackson. Current food work is analyzed through a cultural lens – How is the work influenced by the unique conditions and aspects of Jackson? – and a temporal lens – How does time impact access? What are historic changes and future visions for Jackson? These investigations contribute to opportunities for developing sustainable food systems, determining …
Identifying Immunogenic Pneumococcal Proteins With Roles In Colonization Of Human Epithelium, Abigail Cassibry
Identifying Immunogenic Pneumococcal Proteins With Roles In Colonization Of Human Epithelium, Abigail Cassibry
Theses and Dissertations
Streptococcus pneumoniae (pneumococcus) is a Gram positive opportunistic bacterium that is a primary cause of pneumonia in young children and immunocompromised individuals. This microorganism colonizes the nasopharynx of all age groups and health levels and is easily transmitted through respiratory droplets or aerosols. While capsule-based vaccines are available, these are becoming more obsolete as S. pneumoniae strains are undergoing serotype replacement, thus evading detection, and antibiotic resistant strains are increasing in prevalence. This study has taken a different approach by identifying immunogenic proteins that elicit antibodies which block attachment of bacteria to host epithelial cells. Proteins with the most potential …
Synthesis And Degradation Of Biobased Polymers From Plant Oils Incorporated With Cellulose Nanocrystals., Katherine Elmore
Synthesis And Degradation Of Biobased Polymers From Plant Oils Incorporated With Cellulose Nanocrystals., Katherine Elmore
Theses and Dissertations
Synthetic plastics are intrinsic to modern human existence. Unfortunately, many challenges exist related to the accumulation of plastic waste, including greenhouse gas emissions, contamination of natural environments, and entrance into the food chain through microplastics. Therefore, new polymers are being developed that both compete with the capabilities and costs of petroleum-based plastics and have assured biodegradability. Through decades of research, plant oils have emerged as one of the leading options for alternative starting materials because of their feasibility for use in polymerization reactions, wide availability, renewability, and cost-effectiveness. In this work, cottonseed oil (CSO) and soybean oil (SBO) are successfully …
Functional Complementation And Occidiofungin Susceptibility Of Fungal Actin Orthologs In S. Cerevisiae, Moshood Fagbolade
Functional Complementation And Occidiofungin Susceptibility Of Fungal Actin Orthologs In S. Cerevisiae, Moshood Fagbolade
Theses and Dissertations
Occidiofungin is an antifungal compound that targets the conserved cytoskeletal protein, actin. Despite >90% amino acid conservation between fungal actin proteins, sensitivity to occidiofungin has been shown to vary with C. albicans, F. oxysporum, and P. digitatum exhibiting a resistant profile relative to S. cerevisiae. To determine whether differences in the amino acid sequences of actin contribute to differences in occidiofungin susceptibility, we expressed the actin gene from these fungal organisms in the ACT1 S. cerevisiae shuffle strain. Functionality of actin gene products was determined by measuring growth kinetics, actin protein levels, nuclear position, and actin cable formation. Results demonstrated …
Feasibility And Effectiveness Of Physical Activity Program In People With Down Syndrome Using Self Determination Theory, Maria Haider
Feasibility And Effectiveness Of Physical Activity Program In People With Down Syndrome Using Self Determination Theory, Maria Haider
Theses and Dissertations
Autonomous physical activity (PA) is challenging for adults with Down syndrome (DS) therefore PA programs tailored around facilitators of PA in individuals with Down syndrome (DS) that also align with Self-determination theory (SDT) components could be a feasible and effective way of increasing PA. The purpose was to assess the feasibility and effectiveness of a physical activity program based on self-determination theory in adults with Down syndrome. A dance program was conducted twice a week for 8 weeks. Each session was 60 minutes long. Adults with DS (n = 8) were tested before and after intervention for basic psychological needs …
Evaluating The Effects Of Poultry Litter Amendments On Escherichia Coli Populations, Virulence Genes, And Antimicrobial-Resistance Genes In Poultry Litter During A Live Grow-Out., Faith Henson
Theses and Dissertations
Poultry litter can harbor pathogenic bacteria, including avian pathogenic Escherichia coli (APEC). Applying litter amendments is one strategy to improve bird health and potentially reduce pathogens. Biochar and PLT were applied as litter amendments in a live bird trial to study their effects on E. coli populations, APEC virulence genes (VAG), and antimicrobial resistance (AMR) genes. Samples were collected at days 0, 17, 29, and 41 to enumerate E. coli and store bacterial isolates for antimicrobial-resistance gene analysis. Data analysis showed litter amendments did not significantly affect overall E. coli populations. Grow-out time impacted E. coli populations, with reductions occurring …
Evaluating The Vertical Transmission Potential Of Salmonella Reading In Broiler Breeders, Abubakar Shitu Isah
Evaluating The Vertical Transmission Potential Of Salmonella Reading In Broiler Breeders, Abubakar Shitu Isah
Theses and Dissertations
Salmonellosis, a significant foodborne illness in humans, is caused by Salmonella, with poultry and poultry products acting as significant reservoirs and sources of human infection. Salmonella enterica subspecies enterica serotype Reading has recently emerged as a notable foodborne pathogen responsible for extensive multistate human outbreaks in North America. This study focused on evaluating the capacity of the emerged serotype to colonize broiler breeder reproductive tissues and potentially contaminate eggs, indicating the potential for vertical transmission. For this investigation, two Salmonella Reading strains were utilized, one associated with outbreaks and another non-outbreak strain. Both strains were initially modified with bioluminescent marker …
Effect Of Pressure On Viscoplasticity And Its Usefulness In Designing Impact Devices, Marouane Jarachi
Effect Of Pressure On Viscoplasticity And Its Usefulness In Designing Impact Devices, Marouane Jarachi
Theses and Dissertations
This work investigates the interactions between impact devices and material response in the realm of solid mechanics, utilizing explicit finite element analysis and experimental methods based on the split-hopkinson pressure bar. It focuses on understanding how tools like jackhammers use hammer strikes to generate pressure waves, then the wave is transferred through a chisel to materials such as rocks to cause fracture. The interaction between the wave and the rock is complex. Under dynamic loading the mechanical response of materials changes and significant losses occur due to reflections and inefficient pressure states. This research explores how chisel geometry can be …
Continuum And Discrete Models For Particle-Based Heat Exchangers In Thermal And Thermochemical Energy Storage, Ashreet Mishra
Continuum And Discrete Models For Particle-Based Heat Exchangers In Thermal And Thermochemical Energy Storage, Ashreet Mishra
Theses and Dissertations
Thermal energy storage (TES) systems based on renewable energy sources (concentrated solar, wind, and photovoltaic etc.) are crucial to reducing dependence on conventional energy generation systems and reducing renewable energy’s intermittent nature. TES can be utilized in conjunction with concentrated solar power (CSP) in particle-based power cycles where the particles can be charged (heat addition) using solar energy and then discharged (heat extraction) using particle-based heat exchangers (HX). Efficient particle based HXs are vital in coupling heat transfer fluid (HTF) from thermal receivers to power cycle working fluid (WF). Heat transfer enhancement is essential for adopting particle-based moving packed-bed heat …
Campylobacter Jejuni Survival Under Environmental Stressors, Diksha Pokhrel
Campylobacter Jejuni Survival Under Environmental Stressors, Diksha Pokhrel
Theses and Dissertations
Campylobacter jejuni is microaerophilic pathogen and is one of the leading causes of acute diarrhea in the United States. Despite being a microaerophilic pathogen, C. jejuni continues to endure within the domain of food production, especially in poultry processing. In this study, we evaluated the aerotolerance, biofilm forming abilities, and genetic diversity of C. jejuni isolates previously obtained from commercial broiler processing plants. Out of 40 isolates, 25 (62.5%) were aero–sensitive (AS), 10 (25%) were intermediately aerotolerant (IAT), and 5 (12.5%) were hyper aerotolerant (HAT). The isolates belonged to four clonal complexes (CCs) and six sequence types, with the majority …
Characterization Of The Behavioral Patterns In Salmonella Biofilms Across Different Serovars And Environmental Conditions, Hudson Thames
Characterization Of The Behavioral Patterns In Salmonella Biofilms Across Different Serovars And Environmental Conditions, Hudson Thames
Theses and Dissertations
Biofilms have the potential to form on various abiotic surfaces and have been found to be more resistant to environmental stressors. Therefore, there is a need to investigate the biofilm forming ability and characteristics of Salmonella strains isolated from poultry meat. These studies characterized the biofilm forming capabilities of 5 Salmonella strains on abiotic surfaces, and investigated changes in gene expression that are associated with Salmonella biofilm formation in 3 Salmonella strains. Salmonella biofilms were cultivated on stainless steel, concrete, rubber, and polyethylene under static and shear stress conditions. Biofilm matrix density was determined using a modified crystal violet assay, …
The Role Of Subsurface Dynamics In Cometary Outbursts, Ahmad Sohani
The Role Of Subsurface Dynamics In Cometary Outbursts, Ahmad Sohani
Theses and Dissertations
Comets, often referred to as cosmic time capsules, serve as invaluable repositories of information from the nascent phases of our solar system. Varying significantly in size, with nuclei ranging from a few kilometers to tens of kilometers in diameter, these celestial bodies are complex, porous aggregates of organic molecules, silicate particles, and entrapped volatile gases. Their orbits, which can be categorized into the Main Belt, the Kuiper Belt, and the Oort Cloud, offer distinct insights into their origins and the early conditions of the solar system. Understanding the physical processes occurring within these nuclei is critical, particularly in the context …
Identity Status And Identity Style In The Emo Subculture: Exploring Identity Between Emo Vs. Non-Emo Emerging Adults, Melanie Rebekah Uggen
Identity Status And Identity Style In The Emo Subculture: Exploring Identity Between Emo Vs. Non-Emo Emerging Adults, Melanie Rebekah Uggen
Theses and Dissertations
Emerging adulthood can be viewed as a time of exploration and experimentation for college-aged adults (Arnett, 2000). As individuals begin trying on their possible selves as they explore personal identity, they can gravitate to peer groups that fit their interests. For some, that can mean being drawn to the emo subculture. This subculture focuses on its fashion, often based on dyed black hair, dark clothing, studded accessories, and black eyeliner (Chernoff & Widdicombe, 2015), centered around music with lyrics often interpreted as depressive or angst?ridden. Emo subculture has been subject to criticism and stereotypes, especially those with mental health themes …