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Roles And Interaction Of Blow Flies (Diptera: Calliphoridae) And Introduced Fire Ants (Hymenoptera: Formicidae: Solenopsis Invicta And S. Invicta X Richteri) In Carrion Decomposition In The Southeastern United States, Grant De Jong
Theses and Dissertations
Invasive fire ants (Solenopsis invicta and its hybrid with S. richteri) have been reported from carrion in the southeastern United States and are considered a part of the succession community. Alteration of ecological processes by fire ants could affect forensic interpretation of entomological data; therefore, I conducted studies to investigate the relative roles and interactions of fire ants and blow flies in carrion decomposition. The blow fly species composition in Mississippi has not been studied since 16 species were reported in 1983. Specimens from the Mississippi Entomological Museum were used to update the checklist of the blow flies of Mississippi …
Wintering Population Estimates And Microplastics Prevalence For Tidal Marsh Birds Of Mississippi, Spencer Weitzel
Wintering Population Estimates And Microplastics Prevalence For Tidal Marsh Birds Of Mississippi, Spencer Weitzel
Theses and Dissertations
Due to the global loss of tidal marsh area, potential anthropogenic and natural disturbances to these systems, and coastal marshes’ affinity for trapping environmental pollutants, understanding how marsh birds inhabiting these ecosystems will adapt to these changes is paramount. To quantify future changes, I first needed to have something to compare against – baseline estimates. To this end, I performed distance sampling line transect surveys during the nonbreeding season to estimate species-specific population abundance, density, and habitat associations and captured two species of marsh bird, Clapper Rail (Rallus crepitans) and Seaside Sparrow (Ammospiza maritima), to estimate baseline ingestion of one …
Diet Quality And Mental Health In College Students: Impact On Dietary Factors Including Intake Of Protein, Sugar, Vegetable And Omega-3 Fatty Acid On Depression, Yulu Wang
Theses and Dissertations
Depression is one of the most debilitating disorders among youth. Many factors impact depression risk, and dietary quality is one of the most significant modifiable factors. This work was to investigate whether diet quality, including protein, sugar, vegetables, and omega-3 fatty acids’ intake, had any effect on the development of depression. Data from 82 subjects were used for analysis. There was no significant relationship between Dietary Quality Index (p=.21, n=82) and depression based on this research. Results included total protein (p=.77, n=82), animal-based protein (p=.77, n=82), vegetable-based protein (p=.29, n=82), total sugar (p=.55, n=78), added sugar (p=.48, n=78), total vegetable …
Distribution And Habitat Use Of Sharks In The Coastal Waters Of West-Central Florida, Lindsay Mullins
Distribution And Habitat Use Of Sharks In The Coastal Waters Of West-Central Florida, Lindsay Mullins
Theses and Dissertations
An elasmobranch survey conducted from 2013-2018 in the waters adjacent to Pinellas County, Florida, was used for a baseline assessment of the local shark population. ArcGIS and Boosted Regression Trees were used to identify hot spots of abundance and links between environmental predictors and distribution, as well as create species distribution models. A diverse assemblage of sharks, dominated by five species: nurse shark, bonnethead, Atlantic sharpnose shark, blacktip shark, and blacknose shark, was identified. A large proportion of captures (~42%) were immature sharks. Results indicate areas characterized by seagrass and “No Internal Combustion Engine” zones correlate with greater diversity and …
Controlling Christmas: An Environmental History Of Natural And Artificial Trees, Aaron Thomas
Controlling Christmas: An Environmental History Of Natural And Artificial Trees, Aaron Thomas
Theses and Dissertations
This dissertation argues that from 1880 to 2010 the American natural and artificial Christmas tree industries remodeled themselves after one another. Artificial tree companies modeled their products after the natural tree, hoping to make them look, smell, and feel like the real thing. As these replica trees became popular, scientists, extension agents, and farmers worked to control the natural Christmas tree crop unlike ever before. Those efforts stemmed from a desire to wrest from nature the same kind of idealized silhouettes their plastic counterparts celebrated. Both industries tried to convince the country’s consumers to buy what they were selling. Through …
Engineered Biochar And Eaf Slag For The Removal Of Phosphorus From Stormwater Runoff, James Casey Johnson
Engineered Biochar And Eaf Slag For The Removal Of Phosphorus From Stormwater Runoff, James Casey Johnson
Theses and Dissertations
Phosphorus (P) in stormwater runoff has detrimental effects on water quality and ecosystem health when it reaches surface waters and promotes algal blooms. Constructed wetlands (CWs) have been utilized to combat this problem by containing stormwater and removing excess nutrients. Including filter materials in the design of CWs has shown promise for increasing their capacity for nutrient removal. This mesocosm scale study was conducted outdoors over a 12-month period to evaluate the effectiveness of three filter materials in their ability to adsorb phosphorus, retain water, and support plant life. The filter materials examined were electric arc furnace (EAF) slag, engineered …
Agronomic, Economic, And Ecological Response Of Corn And Soybean Production Systems To Winter Cover Cropping And Minimum Tillage Management In The Mississippi Alluvial Valley, Thomas Beauregard Badon
Agronomic, Economic, And Ecological Response Of Corn And Soybean Production Systems To Winter Cover Cropping And Minimum Tillage Management In The Mississippi Alluvial Valley, Thomas Beauregard Badon
Theses and Dissertations
Winter fallow corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] production systems are susceptible to erosion and agrochemical transport. This research determined the effects of Cover Crop Minimum Tillage (CCMT) on erosion and agrochemical transport from corn-soybean rotations at field scale, while assessing impacts to agroeconomics and irrigation in Mississippi’s Delta Region. CCMT did not affect total suspended solids (p = 0.53), total inorganic phosphorus (TIP) (p = 0.30), or total nitrogen (TN) (p = 0.25) loads, but did reduce TIP (p = 0.018), TN (p = 0.011), and nitrate-nitrite (p = 0.007) concentrations. An economic loss of …
Toward Improved Characterization Of Biologically Relevant Isomeric And Isobaric Ions On Mass Spectrometry-Based Platforms, Baku Acharya
Toward Improved Characterization Of Biologically Relevant Isomeric And Isobaric Ions On Mass Spectrometry-Based Platforms, Baku Acharya
Theses and Dissertations
Mass spectrometry has frequently been employed in the analysis of biologically relevant molecules; however, mass spectrometry alone may not always be sufficient for the differentiation and characterization of isomeric and isobaric ions. In this work, infrared multiple photon dissociation (IRMPD) spectroscopy and ion mobility spectrometry (IMS) were evaluated as complementary techniques for the characterization and separation of isomeric and isobaric ions of biological relevance. In the first project, analysis of experimental IRMPD spectroscopy data shows that this technique is useful in the differentiation of hydroxyproline isomers. Absorption bands allow for the differentiation of three isomeric species: 1640 cm-1 (trans-4-hydroxyproline), 1718 …
Towards A Theory Of Legacy: The Proposal, Development, And Validation Of A Family Legacy Orientation Scale, Nathaniel L. Hammond
Towards A Theory Of Legacy: The Proposal, Development, And Validation Of A Family Legacy Orientation Scale, Nathaniel L. Hammond
Theses and Dissertations
This dissertation follows extant scale development practices to propose, develop, and validate a measurement instrument for the family legacy orientation construct. Family legacy orientation (FLO) is understood to be the shared intentions and preferences a family has regarding the biological, social, and material components of the family legacy. The context of the family firm is of specific interest to the dissertation. The dissertation builds and extends our theoretical understanding of family legacy within the field of family business research. In doing so, the dissertation explores many ideas presented by Hammond et al. (2016; p. 1209) who emphasized the importance of …
Understanding In-Field Soil Moisture Variability And Associated Impact On Irrigation, Blade Hodges
Understanding In-Field Soil Moisture Variability And Associated Impact On Irrigation, Blade Hodges
Theses and Dissertations
Site-specific irrigation decisions require information about variations in soil moisture within the rooting depth actively being used by the crop. Producers have been using soil moisture sensors to make irrigation decisions, and it has been shown that soil moisture sensors can reduce water usage without reducing yields. There are still unanswered questions on improving efficiency with soil moisture sensors based on density and location of sensors within a field. This three-year study uses sensors to evaluate the spatio-temporal variability of soil moisture across an 18-ha production field in a corn/soybean rotation. The IDW results show that when uniform irrigation applications …
Super-Resolution Microscopy Development For The Detection Of Nano-Structures And Confocal Study Of The Structural Damage In Gut Cell Nuclei Due To Total Body Irradiation, Mehedi Hasan
Theses and Dissertations
Optical microscopy is the oldest form of microscopy that has been visually aiding scientific research. In our research, I have reported here two such optical microscopy techniques for two different projects. In the first project, we re-developed an instrumentation of a cost-effective, high-performing, single-molecular localization super-resolution microscopy setup that breaks the diffraction limitation barrier. Then we use a stochastic image capturing technique to capture the best precision image positions of gold nanoparticles. In our second project, we apply confocal microscopy technique to image DNA molecular nanoscale structural alterations of chromatin in cell nuclei of gut tissues caused by total body …
Investigations On Mechanisms Of Survival And Pathogenesis Of Mycobacterium Ulcerans In Polymicrobial Environments, Laxmi Dhungel
Investigations On Mechanisms Of Survival And Pathogenesis Of Mycobacterium Ulcerans In Polymicrobial Environments, Laxmi Dhungel
Theses and Dissertations
Buruli ulcer disease (BUD) remains a ‘mysterious disease’ due to the unknown mode of M. ulcerans transmission and pathogenesis. To understand these, it is important to determine the reservoir of the organism in its natural environments, and stress response and interactions of M. ulcerans in its natural niche and during infection of a host. The major virulence factor of M. ulcerans is mycolactone, a lipid cytotoxin that is encoded on a giant plasmid pMUM001. Genetic analysis suggests that plasmid pMUM001 was acquired by M. ulcerans during evolution from its progenitor, M. marinum. Coincidental evolution of virulence hypothesis suggests that many …
Meso-Mammal Predators And Northern Bobwhite (Colinus Virginianus) Occupancy Of Early Successional Patches In A Managed Ecosystem, Kelsey Fleming
Meso-Mammal Predators And Northern Bobwhite (Colinus Virginianus) Occupancy Of Early Successional Patches In A Managed Ecosystem, Kelsey Fleming
Theses and Dissertations
Heterogeneous landscapes made up of variegated patches are common among managed ecosystems, and often provide diverse structural and compositional habitat characteristics. Landscape heterogeneity can affect distribution of resources, competition, and dispersal of organisms over space and time. Therefore, understanding how species respond to dynamic landscapes is necessary when implementing management decisions that foster biodiversity within managed ecosystems. My study uses hierarchical models in a Bayesian framework to quantify effects of landscape context on meso-mammal predators and northern bobwhite (Colinus virginianus) occupancy in an intensively managed loblolly pine forest. Results indicate that edge density can positively influence occupancy of meso-mammal predators, …
Methionine: An Essential Amino Acid And Potential Enhancer Of Antioxidant Systems In Swine Diets, Rebecca M. Humphrey
Methionine: An Essential Amino Acid And Potential Enhancer Of Antioxidant Systems In Swine Diets, Rebecca M. Humphrey
Theses and Dissertations
L-Methionine (L-Met) is a new product that supplies the biologically active form of methionine. Therefore, the objective of this study was to elucidate the benefits of dietary L-Met supplementation relative to the industry standard DL-Met. Sixteen gilts with an initial BW 81.2±7.93 kg were individually penned and randomly allotted to one of two equivalent dietary treatments for 37 days in 2 trials (8 pigs/trial): DL-Met (0.050% of diet) or L-Met (0.052% of diet). Body weight and feed intake were measured on days 0, 19, and 37 to calculate performance measures. Pigs were harvested and carcasses assessed on day 38. Liver, …
Modified Adsorbents From Waste Materials For Water Remediation, Medagama Liyanage Achala Sandamali Liyanage
Modified Adsorbents From Waste Materials For Water Remediation, Medagama Liyanage Achala Sandamali Liyanage
Theses and Dissertations
Water pollution is one of the major ecological threats people face around the world. Water contamination by organic and inorganic compounds is hazardous to both the environment and human health. Adsorption techniques have gained much attention in the field of water remediation due to their efficiency, simplicity in operation, and ease of implementation. However, the adsorbents currently being used are costly. The main objective of this work is to develop novel, low-cost adsorbents from waste material by modifying the adsorbent surface for water remediation. Adsorbent modifications involve various chemical and physical methods such as acid/base treatments, metal/metal oxide impregnation, functional …
Molecular Dynamics Simulations Of Nano-Scale Impact Icing On Graphene Substrates, Amir Afshar
Molecular Dynamics Simulations Of Nano-Scale Impact Icing On Graphene Substrates, Amir Afshar
Theses and Dissertations
In the atmosphere in the height of 18000ft to 25000ft, there are some metastable droplets called supercooled liquid water in the temperature range of 0◦C to 40◦C. When these droplets impinge on the wings of an airplane, a very thin layer of ice is formed on the surface. This natural phenomenon calls “impact icing”. In this research, I studied the nanoscale impact icing on structured graphite surfaces, as the substrates at the atomistic scale using Molecular Dynamics (MD) simulations. This research focuses on the first steps of the development of a predictive multiscale strategy for molecular simulations of impact ice …
Molecular Dynamics Simulations Of Phospholipid Bilayers Under Deformation – A Comparison Between Gromacs And Lammps, Anh Tn Vo
Theses and Dissertations
Model of nanoscale deformation mechanisms of cellular structures could render different results depending on the molecular dynamics (MD) simulator chosen. Also, the comparison of different MD simulators is typically an intricate task, requiring all configurations be converted appropriately with available parameter choices. This study aims to perform and compare MD simulations between two MD programs (GROMACS and LAMMPS), in which a phospholipid bilayer is deformed under different strain states. The two systems produced similar deformation behaviors and strain state effect on bilayer failure. However, GROMACS produced more pores at lower strains, lower stress, and higher damage values. Multiple setting options …
Genetic Structure Of The Host Plant, Chamaecrista Fasciculata, And Its Microbial Partners, Mahboubeh Hosseinalizadeh Nobarinezhad
Genetic Structure Of The Host Plant, Chamaecrista Fasciculata, And Its Microbial Partners, Mahboubeh Hosseinalizadeh Nobarinezhad
Theses and Dissertations
Local factors have the potential to generate genetic structure within species if populations respond differently to varying environmental conditions across their geographic range. In this project, spatial genetic structure was examined in the legume, Chamaecrista fasciculata, its symbiotic nitrogen fixing bacteria, and rhizosphere microbiomes. In the first chapter, the aim was to test for genetic structure among populations of C. fasciculata in the Southeast and to evaluate whether phenotypic variation in leaf pubescence is associated with genetic divergence among populations, which would be consistent with local adaptation. My results did not detect a significant association between genetic structure and phenotypic …
Host And Tissue Tropisms Of Avian Influenza A Viruses, Minhui Guan
Host And Tissue Tropisms Of Avian Influenza A Viruses, Minhui Guan
Theses and Dissertations
Wild birds are the natural reservoirs of Influenza A viruses (IAVs) which cause occasional pandemics and seasonal epidemics. Avian IAVs can be transmitted from wild birds to domestic poultry, low mammals, and humans. It is well accepted that avian IAVs prefer to sialic acids (Sia) α2,3-linked galactose (SAα2,3-Gal), whereas human IAVs to α2,6-linked galactose (SAα2,6-Gal). However, SAα2,3-Gal in wild bird tissues is widely distributed with little variation while some subtypes of avian IAVs have species preference. The different isolation rates among wild bird species cannot be explained by avian IAVs binding to SAα2,3-Gal alone. Specifically, this dissertation had the following …
Examining Body Composition Differences Between Vegetarian And Non-Vegetarian Women, Carlie Mapp
Examining Body Composition Differences Between Vegetarian And Non-Vegetarian Women, Carlie Mapp
Theses and Dissertations
Diet and lifestyle choices play a vital role in the overall health of an individual. There are many types of diets with varying instructions on what kind and how much of a food, or food group, should be eaten. This cross sectional study focused on possible health benefits of a vegetarian diet in regards to the body composition of non-vegetarian and vegetarian women. Total meat, poultry, seafood, and fish (MPSF) intake were separated into three categories to compare low-to-very-low, moderate, and high intake. Anthropometric measurements collected included waist to hip ratio (WHR), weight, height, and percentage of body fat. No …
The Effects Of Passive Hallux Adduction On Posterior Tibial Artery Blood Flow Compared To The Lateral Plantar Artery, Jaysen Alani Hatch
The Effects Of Passive Hallux Adduction On Posterior Tibial Artery Blood Flow Compared To The Lateral Plantar Artery, Jaysen Alani Hatch
Theses and Dissertations
Passive hallux adduction has been shown to decrease blood flow in the lateral plantar artery (LPA) in a non-weight-bearing condition. Further research in weight-bearing and shod conditions is necessary to explore relationships between altered blood flow and injury or tissue healing. However, measuring blood flow in a shod foot would require an alternate measurement location to accommodate footwear, such as the more proximal posterior tibial artery (PTA). PURPOSE: To determine changes in blood flow in the PTA and LPA subsequent to passive hallux adduction and to compare the observed changes between the two arteries. Second, to determine if measurement at …
An Ulk1-Independent Mechanism Of Atg9a Regulation In Basal Autophagy, Ashari Rashmi Kannangara
An Ulk1-Independent Mechanism Of Atg9a Regulation In Basal Autophagy, Ashari Rashmi Kannangara
Theses and Dissertations
Macroautophagy (hereafter referred to as autophagy) is the bulk degradation and recycling of cytoplasmic materials by forming a double membrane vesicle called the autophagosome. Autophagosome formation is regulated by the coordinated action of a set of proteins. ATG9A is the only multispanning transmembrane protein that plays an essential role in autophagosome formation, yet its function is largely elusive. Previous studies have shown that the C-terminus of ATG9A plays an important role in regulating its trafficking and proper function in autophagy. In line with that idea, we previously identified an AMPK- and ULK1- mediated phosphorylation on the C terminus of ATG9A …
Implicit Attitudes Toward Children’S Gender Nonconforming Behavior: The Mediating Role Of Stigma By Association When Blaming Mothers, Emily A. Morrow
Implicit Attitudes Toward Children’S Gender Nonconforming Behavior: The Mediating Role Of Stigma By Association When Blaming Mothers, Emily A. Morrow
Theses and Dissertations
This study was designed to examine the possible connection between a child’s gender nonconformity and attitudes toward both the child and the mother of the gender nonconforming child. Specifically, this study explored the impact of gender nonconforming behavior on undergraduate student perceptions of the child and the parenting competence of the mother. Following social psychology theories examining stigma and stigma by association, this study represents an attempt to determine whether gender nonconforming behavior is a stigmatizing factor, and if that stigma is carried over to the mother. Findings from this study suggested that gender nonconforming behavior is indeed a stigma …
The Impact Of Childhood Sexual Abuse On Adulthood Eating Disorders: When Healthy Eating Becomes Unhealthy, Audryn Andreoli
The Impact Of Childhood Sexual Abuse On Adulthood Eating Disorders: When Healthy Eating Becomes Unhealthy, Audryn Andreoli
Theses and Dissertations
The Centers for Disease Control and Prevention (CDC; 2020c) estimated that approximately 3.7 million children experience childhood sexual abuse (CSA) every year in the United States. CSA is a significant issue associated with negative psychosocial and health-related outcomes, including eating disorders (Afifi et al., 2017). While there has been substantial research completed regarding CSA and eating disorders, there is a significant gap in the literature regarding Orthorexia Nervosa (ON) and CSA. The present study sought to determine whether CSA is a risk factor ON and determine the relationship between frequency of occurrence of CSA, sex, race, previous eating disorder diagnosis, …
An Empirical Investigation Of The Dimensions Of Product Similarity Used In Design By Analogy Of Electromechanical Products, Arnold Nkoane Tsoka
An Empirical Investigation Of The Dimensions Of Product Similarity Used In Design By Analogy Of Electromechanical Products, Arnold Nkoane Tsoka
Theses and Dissertations
Analogical reasoning is known to be a core cognitive mechanism behind creative human tasks including the creativity in engineering design. Research shows that during product ideation, designers use analogy to transfer information from prior designs stored in their memory (the source of the analogy) to the task in hand (target of analogy). However, similar to any search process, the source product must be first identified as a potential candidate for analogy before this information transfer can take place. Two products can be similar along multiple dimensions such as their form, function, etc. The dimensions of similarity between two products that …
Development And Characterization Of Robust Methods For Field Investigations With Portable Mass Spectrometry, Ashley Rose Stelmack
Development And Characterization Of Robust Methods For Field Investigations With Portable Mass Spectrometry, Ashley Rose Stelmack
Theses and Dissertations
Portable mass spectrometry (MS) has become an area of interest due to the ability to conduct chemical analyses in native environments. These instruments have the potential to increase efficiency and analytical throughput via real-time experimentation, minimizing the need for sample transportation. One drive towards the development of fieldable mass spectrometers is the potential for coupling to novel ambient ionization methods (or “ambient MS”), which can generate spectral data at ambient conditions from unprepared or minimally prepared samples of interest. Since the first introduction of the desorption electrospray ionization (DESI) technique in 2004, a myriad of novel techniques have been reported …
Two Journeys Of The Spirit: Comparing Plato's Republic And Ibn Tufayl's Hayy Ibn Yaqzan, Zeina Abdallah Jehama
Two Journeys Of The Spirit: Comparing Plato's Republic And Ibn Tufayl's Hayy Ibn Yaqzan, Zeina Abdallah Jehama
Theses and Dissertations
Both Plato’s Republic and Ibn Tufayl’s Hayy Ibn Yaqzan explain to the reader how a spiritual journey can bring about an understanding of the Divine. However, both works also show us that the spiritual journey depends on an inquiry into the nature of the human soul as it engages in the process of learning. In the first chapter of the thesis, Plato’s Republic is explored, particularly in terms of the Allegory of the Cave, which suggests how the notion the Divine goes beyond everyday life experience. In the second chapter, Hayy Ibn Yaqzan is presented as a spiritual narrative that …
Frequency Based Capacitive Biosensor, Yehia El-Sehrawy
Frequency Based Capacitive Biosensor, Yehia El-Sehrawy
Theses and Dissertations
Unlike traditional medical equipment that tend to be bulky and expensive, biosensors are portable, versatile, and inexpensive for mass production. Biosensors allow for early detection of disease due to their wide reach which increases the patients’ chances of recovery. The literature presents several biosensor techniques based on DNA hybridization, contact imagers, and capacitance transduction. This thesis presents a ring oscillator based biosensor that uses capacitance to frequency transduction for the detection of viral and cancer diseases. The design features a differential measurement to eliminate the effect of parasitic capacitances on the measurement. In order to mitigate the typical errors of …
Effect Of Triclosan-Tolerant Plant Growth-Promoting Rhizobacteria On Triclosan Degradation In Soils, Ashley Marie Garcia
Effect Of Triclosan-Tolerant Plant Growth-Promoting Rhizobacteria On Triclosan Degradation In Soils, Ashley Marie Garcia
Theses and Dissertations
Triclosan (TCS), an antimicrobial found in commercial products, can also be found in freshwater systems used for crop irrigation. Thus, TCS may accumulate over time in soils, potentially affecting plant growth-promoting rhizobacteria (PGPRs). Bacterial isolates from a previous study which demonstrated PGPR activity and TCS tolerance (TPGPRs) were chosen to evaluate the use of triclosan as a sole carbon source on a minimal salts medium (MSMT). TPGPRs, which demonstrated TCS utilization, were chosen for inoculation into soil microcosm for triclosan degradation (TD-PGPRs). Soil microcosms were arranged in a 2 x 5 factorial randomized block design and irrigated with triclosan treatments …
Perceptions Of The Indonesia National Curriculum In Relation To Integrated Stem Education At The High School Level, Andinisa Rahmaniar
Perceptions Of The Indonesia National Curriculum In Relation To Integrated Stem Education At The High School Level, Andinisa Rahmaniar
Theses and Dissertations
High school students need 21st-century skills to be competitive in the global economy. STEM education, coupled with problem-solving, critical thinking, innovation, and written and oral communication skills are essential for high school students. In Indonesia, STEM education is not as common as in the United States; some teachers in Indonesia use STEM as a learning method, but it is not included as a major component in the Indonesian curriculum. This study aimed to analyze (a) how teachers implement STEM-based lessons, including hands-on activities and project-based learning in relation to the Indonesian National Curriculum and (b) teachers’ prior knowledge about integrating …