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2020

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Quantifying Animal Movement: Using A Power-Law To Model The Relationship Between First Passage Time And Scale, Zoë Johnson Aug 2020

Quantifying Animal Movement: Using A Power-Law To Model The Relationship Between First Passage Time And Scale, Zoë Johnson

Theses and Dissertations

In a heterogenous environment, an animal will increase its search effort in areas where resources are abundant. This behavior can be detected in a path by a decrease in speed, an increase in tortuosity, or both. First passage time, the amount of time required for an animal to traverse a circle of a given radius, or buffer, is a common metric for quantifying spatial and temporal changes along a path. Historical methodology involving first passage time limits the utility of this metric. Here we instead follow the methodology put forth by Street et al. (2018) and use a power-law model …

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Removal Of Molybdenum From Contaminated Water Using Douglas Fir Biochar/Iron Oxide Composites, Naba Krishna Das Aug 2020

Removal Of Molybdenum From Contaminated Water Using Douglas Fir Biochar/Iron Oxide Composites, Naba Krishna Das

Theses and Dissertations

Molybdenum (Mo) is a naturally occurring trace element that is present in drinking water mostly in the molybdate (MoO42-) form in well water. Recently, the EPA deemed Mo as a potential contaminant because exposure can lead to health effects such as gout, hyperuricemia, and lung cancer. In this work, we have assessed the sorptive removal of Mo using Douglas fir biochar (DFBC) and its chemically-coprecipitated iron oxide analogue (DFMBC). Adsorption was studied varying the batch sorption conditions; pH, equilibrium time (5 min-24 h), initial Mo concentrations (2.5-1000 mg/L), temperatures (5, 25, and 40 °C) and equilibrium method. Langmuir capacities for …

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Response Of Male White-Tailed Deer (Odocoileus Virginianus) To Human Activity On The Landscape, Colby Henderson Aug 2020

Response Of Male White-Tailed Deer (Odocoileus Virginianus) To Human Activity On The Landscape, Colby Henderson

Theses and Dissertations

Human activity affects white-tailed deer (Odocoileus virginianus) movement and habitat selection during all times of the year, but knowledge is limited regarding how human risk affects white-tailed deer during the summer and winter. During spring and summer, variation in patch selection varied. Natural vegetation was selected for early in the year, with anthropogenic forages being important for deer use during the summer. During the winter, deer responded to different levels of risk. As hunter risk increased on the landscape, deer altered selection of the landscape. Deer avoided areas that were heavily used by hunters, using areas containing less hunter risk. …

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Nonoscillatory Second-Order Procedures For Partial Differential Equations Of Nonsmooth Data, Philku Lee Aug 2020

Nonoscillatory Second-Order Procedures For Partial Differential Equations Of Nonsmooth Data, Philku Lee

Theses and Dissertations

Elliptic obstacle problems are formulated to find either superharmonic solutions or minimal surfaces that lie on or over the obstacles, by incorporating inequality constraints. This dissertation investigates simple iterative algorithms based on the successive over-relaxation (SOR) method. It introduces subgrid methods to reduce accuracy deterioration occurring near the free boundary when the mesh grid does not match with the free boundary. For nonlinear obstacle problems, a method of gradient-weighting is introduced to solve the problem more conveniently and efficiently. The iterative algorithm is analyzed for convergence for both linear and nonlinear obstacle problems. Parabolic initial-boundary value problems with nonsmooth data …

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Phosphate Reclamation From Water Using Douglas Fir Biochar Fe/Mg-Ldh Composites, Sharifur Rahman Aug 2020

Phosphate Reclamation From Water Using Douglas Fir Biochar Fe/Mg-Ldh Composites, Sharifur Rahman

Theses and Dissertations

Eutrophication, caused by phosphate, can be detrimental both for the aquatic environment and human health. This research aims to provide deep knowledge about the adsorption properties of low-cost Fe/Mg layered double hydroxide modified biochar (LDHBC) for removal of phosphate from aqueous solution. Firstly, Fe/Mg layered double hydroxide (LDH) was synthesized by mixing FeCl3 and MgCl2. 6H2O salts in water, followed by NaOH treatment (coprecipitation method). For LDHBC, FeCl3, and MgCl2. 6H2O salts were dissolved in water, and Douglas fir biochar was added to the salts mixture to make a slurry, followed by NaOH treatment. The surface chemistry and elemental composition …

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Early Administration Of Probiotics Through In Ovo Inoculation And Their Impact On Gut Microflora, Immune Response, And Growth Performance Of Broiler Chicks, Claudia Duneska Castañeda Bustillo Aug 2020

Early Administration Of Probiotics Through In Ovo Inoculation And Their Impact On Gut Microflora, Immune Response, And Growth Performance Of Broiler Chicks, Claudia Duneska Castañeda Bustillo

Theses and Dissertations

Controlling pathogenic presence in broilers has become a priority in the poultry industry to prevent economic losses due to disease and infection, as well as the possible contamination of chicken products. The use of antibiotics reduces the incidence of infections; however, their removal from production initiated the search for suitable alternatives. Probiotic ineed supplements have been widely evaluated as alternatives. Probiotic use has improved broiler performance, reduced pathogenic loads, and stimulated the immune system at later life stages. However, there is still a gap in protection during the first weeks after the chick hatches. The in ovo supplementation of probiotics …

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Characterization Of Integrin-Linked Kinase Functions In Cell Wall Immunity, Emily Cooley Aug 2020

Characterization Of Integrin-Linked Kinase Functions In Cell Wall Immunity, Emily Cooley

Theses and Dissertations

Plants have several defense systems used as protection from environmental stressors, and the plant cell wall (CW) is considered the “frontline” during attack. The CW is a complex structure essential for growth and development and is composed of components such as cellulose, polysaccharides, pectin, and lignin. Lignin is the central source of strength for the CW and helps form a water-impermeable barrier for defense. The extent of plant CW defense, immunity, and the components involved still need further investigation. Integrin-Linked Kinases (ILKs), a subfamily of Raf-like kinases (RAFs), are thought to participate in signal-processing pathways of the CW and plasma …

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Characterizing Human Receptor-Mediated Cytotoxicity By Staphylococcal Bi-Component Leucocidins In S. Aureus Pathogenesis, Jaime Rutter Aug 2020

Characterizing Human Receptor-Mediated Cytotoxicity By Staphylococcal Bi-Component Leucocidins In S. Aureus Pathogenesis, Jaime Rutter

Theses and Dissertations

Staphylococcus aureus employs an array of virulence factors to aid in its pathogenesis. A subset of cytotoxins termed bi-component leucocidins have been characterized as important determinants in the host-pathogen interaction in S. aureus infections. While they have been studied over a century, bi-component leucocidins’ complex mechanisms in pathogenesis have not been fully elucidated. Secreted as monomers, with the exception of LukAB/GH, many combinations of the S- (HlgA, HlgC, LukE, LukS, LukA/H) and F- (HlgB, LukD, LukF, LukB/G) components have demonstrated cell lysis via pore formation and a magnified proinflammatory response at sublytic concentrations. While studies have described various host cellular …

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Conservation And Coexistence Of A Federally Listed Species Within A Landscape Highly Modified For Commodity Production: Gopher Tortoise (Gopherus Polyphemus) And Intensive Pine (Pinus Spp.) Management, Duston R. Duffie Aug 2020

Conservation And Coexistence Of A Federally Listed Species Within A Landscape Highly Modified For Commodity Production: Gopher Tortoise (Gopherus Polyphemus) And Intensive Pine (Pinus Spp.) Management, Duston R. Duffie

Theses and Dissertations

Gopher tortoise (Gopherus polyphemus; hereinafter, tortoise) is listed as threatened under the Endangered Species Act in the western portion of its range. Across the species’ range, approximately 70 % of potential habitat is privately owned, and these properties are often managed primarily for timber production. However, tortoise ecology on private, working forest landscapes remains poorly understood. To provide a better understanding of tortoise response to active forest management, I evaluated population demographics, movement ecology, and habitat selection of two tortoise populations: former Ben’s Creek Wildlife Management Area (BC) in Washington Parish, Louisiana and Perry County Gopher Tortoise Management Unit (PCGTMU) …

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Easily Overlooked: Modelling Coastal Dune Habitat Occupancy Of Threatened And Endangered Beach Mice (Peromyscus Polionotus Spp.) Using High-Resolution Aerial Imagery And Elevation Models Of The Northern Gulf Of Mexico, Wesley Burger Aug 2020

Easily Overlooked: Modelling Coastal Dune Habitat Occupancy Of Threatened And Endangered Beach Mice (Peromyscus Polionotus Spp.) Using High-Resolution Aerial Imagery And Elevation Models Of The Northern Gulf Of Mexico, Wesley Burger

Theses and Dissertations

The Gulf of Mexico dune system is a broad and dynamic environment that varies greatly in geomorphology and vegetative composition across the Gulf coastline. Beach mice (Peromyscus polionotus spp.) are an endangered species that rely on coastal habitat structure. I hypothesized that beach mouse occupancy would be dependent upon coastal dune land cover and landform features. I identified coastal landforms using high-resolution elevation data and landform models in GRASS GIS and identified coastal dune vegetation classes using high-resolution aerial imagery and object oriented vegetation classification. These features were used to create a dynamic occupancy model to determine occupancy patterns in …

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Effects Of Cover Crop Management On Biologically Related Soil Properties In A Mississippi Dryland Soybean System, Sapana Pokhrel Aug 2020

Effects Of Cover Crop Management On Biologically Related Soil Properties In A Mississippi Dryland Soybean System, Sapana Pokhrel

Theses and Dissertations

Soil microorganisms are important for the stabilization and preservation of a good soil structure. Management practices can affect the diversity and population of microorganisms, which could beneficially change soil properties and promote a more sustainable dryland system. This study was established near Pontotoc, MS on Atwood silt loam to evaluate the impacts of cover crops and fertilizer sources on selected biologically related soil properties in a no-tillage, dryland soybean system. Soil analyses included total carbon and nitrogen, permanganate oxidizable carbon (POXC), easily extractable glomalin-related soil protein (EE-GRSP), water stable aggregate (WSA) and soil pH. Cover crop biomass and percent groundcover, …

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Effects Of Fire Phenology And Stump Sprouting On Summer Nutritional Carrying Capacity For White-Tailed Deer, Rainer Nichols Aug 2020

Effects Of Fire Phenology And Stump Sprouting On Summer Nutritional Carrying Capacity For White-Tailed Deer, Rainer Nichols

Theses and Dissertations

Prescribed fire is commonly used to manage white-tailed deer habitat. However, nutrition is still limited during the summer for deer in the Southeast and prescribed fire is commonly restricted to the dormant season. Knowledge of fire phenology effects on summer nutrient availability is relatively unknown. Stump sprouts may also affect available nutrition, which could be important when managing for summer nutrition. To address this summer nutritional stress period, I examined impacts prescribed fire phenology and mechanical stump sprouting had on summer nutritional carrying capacity for deer. Results indicated implementing prescribed fire in both dormant and growing-seasons led to increased summer …

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Evaluation Of Bollworm Behavior, Damage, And Control In Cotton With Insecticidal Proteins And Formulated Insecticides, Russell Ethan Godbold Aug 2020

Evaluation Of Bollworm Behavior, Damage, And Control In Cotton With Insecticidal Proteins And Formulated Insecticides, Russell Ethan Godbold

Theses and Dissertations

The bollworm, Helicoverpa zea (Boddie), is an economically important pest of cotton and is becoming more difficult to control in the United States. This project was designed to develop a better understanding of the effects of resistance development and plant structures on the efficacy of Bt cotton and foliar insecticides. Experiments examined larval behavior and damage in current cotton varieties expressing proteins from Bacillus thuringiensis. Other experiments examined the effects of floral structures on the control of bollworm using foliar insecticides. Results suggest that larval feeding and avoidance behavior is dependent on point of eclosion. Fruiting form damage increased in …

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A Survey Of Neonicotinoid Residue Levels In Native Bees And Soil Of The Mississippi Black Belt Prairie, Sena Isbilir Aug 2020

A Survey Of Neonicotinoid Residue Levels In Native Bees And Soil Of The Mississippi Black Belt Prairie, Sena Isbilir

Theses and Dissertations

Reports of declining insect populations suggest that more research focusing on this phenomenon is needed, especially in pollinator insects. Climate change, habitat destruction, and usage of certain pesticides have all been implicated in insect decline. Neonicotinoid pesticides are highly toxic to bees, can have drastic sub-lethal effects on behavior, and are persistent in the environment; likewise, they have been implicated as a major factor affecting bee populations. However, there are limited studies on native bees regarding their interactions with neonicotinoids, even regarding simple questions such as exposure levels. In this study, we aimed to assess concentrations of common neonicotinoids in …

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Adversity And Resilience Training: Trauma-Informed Care As A Universal Community Intervention, Lediya Dumessa Aug 2020

Adversity And Resilience Training: Trauma-Informed Care As A Universal Community Intervention, Lediya Dumessa

Theses and Dissertations

Growing evidence of the health risks associated with adverse childhood experiences (ACEs) has prompted public health and community initiatives to promote awareness, detection, and responses that are trauma informed. Nationwide programs to integrate trauma-informed care into education, health care, and child serving agencies, have thus far led to the proposal and advancement of trauma-informed policies and practices in many communities. While Mississippi agencies include trauma-specific intervention and training, statewide ACEs initiatives and relevant data are still limited. This project aimed to contribute to the larger goal of a statewide trauma-informed paradigm shift, by increasing ACEs awareness and developing recommendations for …

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Allelopathy In Weedy Rice As A Genetic Resource For Developing Competitive Rice Varieties, Brooklyn Christine Schumaker Aug 2020

Allelopathy In Weedy Rice As A Genetic Resource For Developing Competitive Rice Varieties, Brooklyn Christine Schumaker

Theses and Dissertations

Weedy rice is of the same species as cultivated rice, Oryza, and is a common rice weed exhibiting allopathic characteristics. Incorporation of allelopathic traits from weedy rice into cultivated rice may have a positive impact on rice yield. The overall objective of this study was to characterize weedy rice accessions based on the allelopathic potential to suppress barnyardgrass. These accessions, once discovered, may be used in identifying phenotypic traits and genes associated with their weed suppressive trait. Ten weedy rice accessions, and five rice cultivars (Rex, CL163,Rondo, PI312777, PI338046) were screened using a stair-step technique. The allelopathic potential was calculated …

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Assisted Reproductive Technologies In Male Ambystoma Tigrinum With Application To Threatened Newt Species, Amanda Gillis Aug 2020

Assisted Reproductive Technologies In Male Ambystoma Tigrinum With Application To Threatened Newt Species, Amanda Gillis

Theses and Dissertations

The world is currently facing an amphibian extinction crisis and wild salamanders and newts (Order: Caudata) are the most disadvantaged with 52% of species threatened. Captive breeding programs are been established to act as assurance colonies, but they are overwhelmingly failing due to the lack of environmental cues to stimulate reproduction and other factors. Therefore, assisted reproductive technologies (ART) are being developed to overcome these barriers. This project expands upon the limited existing information on caudate ART through studies in the model species, Ambystoma tigrinum, for application to threatened species. Specific objectives included the characterization of motility longevity in artificially …

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Biomechanical Comparison Of External Fixation And Double Plating For The Stabilization Of A Canine Cadaveric Supracondylar Humeral Fracture Gap Model, Sarah Castaldo Aug 2020

Biomechanical Comparison Of External Fixation And Double Plating For The Stabilization Of A Canine Cadaveric Supracondylar Humeral Fracture Gap Model, Sarah Castaldo

Theses and Dissertations

A 2 cm ostectomy was performed on 10 pairs of canine cadaveric humeri proximal to the supratrochlear foramen. Stabilization was with a double plate construct (DB-PLATE) (n=10) or external skeletal fixator with intramedullary pin tie-in configuration (ESF-IMP) (n=10). Cyclic testing was performed. Axial compressive load to failure testing followed. Data analyzed included dynamic stiffness, stiffness and yield load. No constructs failed during cyclic testing or lost stiffness over time, although mean dynamic stiffness was greater for DB-PLATE compared to ESF-IMP. Mean stiffness of DB-PLATE in load-toailure testing was not significantly different than ESF-IMP. Yield force of DB-PLATE was significantly higher …

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Biomolecular Analysis Of An Insect Of Economic Importance, The Multicolored Asian Lady Beetle, Selene Perales Sanchez Aug 2020

Biomolecular Analysis Of An Insect Of Economic Importance, The Multicolored Asian Lady Beetle, Selene Perales Sanchez

Theses and Dissertations

Insect-human interactions are very complex; one example is the relationship between humans and the multicolored Asian lady beetle (ALB; Harmonia axyridis). ALB, a native to Asia, was introduced into North American agricultural fields and orchards as a biological control agent for aphids and other soft-bodied insects. However, it is considered a pest by some humans as it invades houses in the fall and winter months. Additionally, ALBs feed on fruits when aphids are scarce, and the hemolymph secreted by ALBs contaminates fruit and affects the taste of fruit products. ALBs invasive behavior has led to concern that this non-native species …

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Brain And Hepatic Microsomal Metabolism Of Phorate, Marissa Lucento Aug 2020

Brain And Hepatic Microsomal Metabolism Of Phorate, Marissa Lucento

Theses and Dissertations

Phorate (O,O-diethyl S-ethylthiomethyl phosphorodithioate) is a toxic organophosphate anticholinesterase insecticide. Organophosphate insecticides can cause respiratory depression and seizures due to acetylcholinesterase inhibition. Inhibited acetylcholinesterase cannot break down the neurotransmitter, acetylcholine; thus, causing an overload of acetylcholine in synapses and neuromuscular junctions. Oxidative desulfuration, from metabolism by cytochrome P450 enzymes, converts the P=S phosphorothionate group on phorate to the P=O oxon group. Electrophilic oxon groups attack the active site on acetylcholinesterase, inducing the toxicity associated with organophosphate insecticides. Possible further bioactivation to phorate-oxon-sulfoxide and phorate-oxon-sulfone near the site of acetylcholinesterase in the brain may increase acetylcholinesterase inhibitory potency. Adult male Sprague-Dawley …

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Trans Men And The Criminal Justice System: An Exploratory Analysis Examining Intersectional Experiences, Sarah Rogers Aug 2020

Trans Men And The Criminal Justice System: An Exploratory Analysis Examining Intersectional Experiences, Sarah Rogers

Theses and Dissertations

This dissertation examines the lives of trans men and their experiences with pathways to or avoidance of the criminal justice system. I used feminist criminological theory, specifically feminist pathways theory, as well as queer criminological theory, and intersectionality to explore these men’s experiences with child abuse, sexual victimization, homelessness, the presence of support systems, and coping strategies. Through the use of 27 semi-structured, in-depth phone interviews with trans men across the United States, I find common experiences among those who have been incarcerated (15) and those who have not (12). Regarding trans men’s pathways to offending, I find similar victimization …

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Trends And Drivers Of Conservation Easements In The United States, Sabhyata Lamichhane Aug 2020

Trends And Drivers Of Conservation Easements In The United States, Sabhyata Lamichhane

Theses and Dissertations

The use of conservation easements has been increasing in the United States. However, patterns of growth over time are different for individual states. Little is known on how determinants of conservation easements interact with one another and affect the choice of conservation approaches. The study objective was to analyze conservation easement trends and examine underlying choice determinants in the United States. Panel data models were employed to assess determinants of easement acres and contracts from 1995 to 2015. Findings revealed that the northern United States has the most percentage of land area under conservation easements. The growth in conservation easements …

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Using Animated Videos And Prompt Delay Procedures To Train Children With Autism To Label Situation-Based Emotions, Margaret Powell Aug 2020

Using Animated Videos And Prompt Delay Procedures To Train Children With Autism To Label Situation-Based Emotions, Margaret Powell

Theses and Dissertations

Research has indicated that individuals with ASD have deficits in the ability to correctly identify and interpret the emotions and feelings of others. The ability to recognize the emotions of others has shown to be extremely beneficial in a number of ways. On the other hand, the inability to recognize the emotions of others has been linked to a number of negative outcomes, including inappropriate behaviors, as well as mental health, personal, social, and academic difficulties. The purpose of the current study was to extend the previous literature on effective strategies for teaching individuals with ASD to correctly label the …

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Struggling Adolescent Readers: A Case Study Of Teacher Beliefs And Practices Using The How People Learn Framework, Laura Katherine Thomas Hood Aug 2020

Struggling Adolescent Readers: A Case Study Of Teacher Beliefs And Practices Using The How People Learn Framework, Laura Katherine Thomas Hood

Theses and Dissertations

In this qualitative study, I explored teacher beliefs and practices about struggling adolescent readers. I chose to study 3 middle school 7th- and 8th-grade English teachers based on purposeful and convenience sampling through principal recommendation. My data consisted of interviews, observations, and documents to understand what teachers believe about struggling adolescent readers and what teachers of struggling middle school students do during instruction. I created the interviews and observation protocols and analyzed the data using the How People Learn Framework (Darling-Hammond & Bransford, 2005; National Research Council, 2000). Findings suggest (1) negative extrinsic motivation was used to boost student assessment …

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Improved Monitoring And Decision-Making To Manage Atypical Aeromonas Hydrophila In Catfish Aquaculture Ponds, Bradley Richardson Aug 2020

Improved Monitoring And Decision-Making To Manage Atypical Aeromonas Hydrophila In Catfish Aquaculture Ponds, Bradley Richardson

Theses and Dissertations

Commercial catfish production is an inveterate industry within the southeastern United States. Bacterial disease is a significant detriment to global aquaculture, including the United States catfish industry. Among them, an atypical strain of the bacterium Aeromonas hydrophila has plagued the industry since the late 2000s. Atypical A. hydrophila (aAh) outbreaks are largely acute, resulting in catastrophic losses. The disease ecology, prevalence, and genetic distribution are poorly understood. Atypical Aeromonas hydrophila displays a rapid onset with few warning signs of the impending disease, making it difficult for early detection. At present there are two recognized haplotypes of aAh. This project aimed …

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Innate And Adaptive Immune Responses Of Channel Catfish To Edwardsiella Ictaluri Wild Type And Live Attenuated Vaccine Candidates, Ozgur Erdogan Aug 2020

Innate And Adaptive Immune Responses Of Channel Catfish To Edwardsiella Ictaluri Wild Type And Live Attenuated Vaccine Candidates, Ozgur Erdogan

Theses and Dissertations

Edwardsiella ictaluri causes enteric septicemia of catfish (ESC), a devastating disease in the channel catfish industry. Our research group has developed several E. ictaluri live attenuated vaccine (LAV) candidates (EiΔevpB, EiΔevpBΔfur, EiΔevpBΔhfq, EiΔevpBΔfurΔhfq), which were able to stimulate an immune response in vaccinated channel catfish and reduce ESC. However, innate, and adaptive immune responses in the lymphoid tissues of channel catfish to these LAVs are not known well. The overall goal of the project is to determine the role of adaptive and innate immune responses in catfish after vaccination with LAVs. Analysis of innate and adaptive immune-related gene expressions showed …

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Integrin-Linked Kinases Are Components Of A Cell Wall Integrity Signaling Pathway Required For Innate Immune Responses, Gizem Dimlioglu Aug 2020

Integrin-Linked Kinases Are Components Of A Cell Wall Integrity Signaling Pathway Required For Innate Immune Responses, Gizem Dimlioglu

Theses and Dissertations

Signaling networks have a crucial role in every aspect of plant communication with the environment. There is significant interest in identifying signal transduction pathways governing CW homeostasis in interactions with pathogens and symbionts. In previous work, our lab has demonstrated that the RAF-like Integrin-Linked Kinase 1 (ILK1) is a negative regulator of FLS2 (Flagellin Sensing2)-mediated signaling, required for defense against a low-virulence P. syringae T3SS-mutant, and modulating cellular ion homeostasis through functional interactions with Ca2+ sensor CML9 and HAK5 K+ transporter (Brauer et al., 2016). In this work we revealed that ILK1 homologs, ILK4 and ILK5, are required for plant …

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Intraspecific Variability Of Edwardsiella Piscicida And Cross-Protective Efficacy Of A Live-Attenuated Edwardsiella Ictaluri Vaccine In Channel And Channel × Blue Hybrid Catfi, Adrian Lopez Porras Aug 2020

Intraspecific Variability Of Edwardsiella Piscicida And Cross-Protective Efficacy Of A Live-Attenuated Edwardsiella Ictaluri Vaccine In Channel And Channel × Blue Hybrid Catfi, Adrian Lopez Porras

Theses and Dissertations

Incidence and prevalence of Edwardsiella piscicida has increased in Mississippi farm-raised catfish in recent years. Edwardsiella piscicida affects mostly market-sized catfish during the final stages of the production cycle resulting in significant economic losses. The objectives of this study were to determine the genetic variability of E. piscicida, assess virulence in channel and hybrid catfish, and evaluate the capacity of a live-attenuated E. ictaluri vaccine to protect channel and hybrid catfish against heterologous E. piscicida isolates. This work identified five discrete E. piscicida lineages, along with group specific associations of several virulence related genes. In general, E. piscicida was shown …

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Introgression Of Qtl 2.04 And 5.03 Into Maize Commercial Inbreds And Agronomic Evaluation For Preharvest Aflatoxin Accumulation In Their Near Isogenic Lines And Testcrosses, Venkata Mannam Aug 2020

Introgression Of Qtl 2.04 And 5.03 Into Maize Commercial Inbreds And Agronomic Evaluation For Preharvest Aflatoxin Accumulation In Their Near Isogenic Lines And Testcrosses, Venkata Mannam

Theses and Dissertations

Maize, Zea mays L., is the largest cereal grain crop grown in United States. Its yield and grain quality are adversely impacted by diseases every year. Aspergillus ear rot, caused by the fungus Aspergillus flavus, received little interest until its carcinogenic secondary metabolites, aflatoxins, were discovered. The objectives of this study were to introgress the quantitative trait loci (QTL) 2.04 from Mp313E and 5.03 from Mp715 into two commercial inbred lines, MonF and MonM; and evaluate their near isogenic lines (NILs) and testcrosses for preharvest aflatoxin accumulation and secondary agronomic traits. Marker assisted selection to create NILs and the testcross …

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Investigating Fear: Exploring Mediators And Moderators Of Mental Health Distress Among Lgbtq+ Communities Using The Minority Stress Model, Melanie R. Walsh Aug 2020

Investigating Fear: Exploring Mediators And Moderators Of Mental Health Distress Among Lgbtq+ Communities Using The Minority Stress Model, Melanie R. Walsh

Theses and Dissertations

The current study is a secondary analysis examining the role of fear of discrimination and its influence and relationship with heterosexist discrimination, social support, and mental health distress among LGBTQ+ adults in the Deep South. A sample of 500 LGBTQ+ identified adults living across Mississippi completed a comprehensive needs assessment survey tapping into nine life domains. The current study investigated fear of discrimination as a form of rejection sensitivity utilizing the minority stress framework (Meyer, 1995, 2003). Mediating and moderating influences within the minority stress model were examined using series of regression analysis. Fear of discrimination operated as a mechanism …

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