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Impact Of Subsurface Drainage On Water Yield For Typical Soil And Weather In Eastern South Dakota, Govinda Karki Jan 2017

Impact Of Subsurface Drainage On Water Yield For Typical Soil And Weather In Eastern South Dakota, Govinda Karki

Electronic Theses and Dissertations

Subsurface drainage in agricultural land changes the field water balance by providing an alternate pathway for subsurface water. Determining the effects of subsurface drainage on downstream hydrology requires quantifying the components of the water balance. A number of studies have looked at the hydrological impacts of subsurface drainage. However, the effects are complex and difficult to generalize. The complex interaction involves the interrelation among variables such as soil type and properties, climate (rainfall and evapotranspiration), and drainage design configuration (drainage intensity and drainage coefficient), which all are local in nature. Additionally, most studies have been conducted in humid climates, whereas …

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Assessment Of Watershed Condition And Vulnerability To Forecasted Land-Use/Land-Cover Change In The Northwestern Great Plains Of Western South Dakota, Aaron Suehring Jan 2017

Assessment Of Watershed Condition And Vulnerability To Forecasted Land-Use/Land-Cover Change In The Northwestern Great Plains Of Western South Dakota, Aaron Suehring

Electronic Theses and Dissertations

A projected increase in global population by mid-century will likely further intensify agricultural practices given future demand for food, increasing the strain on the nation’s aquatic resources. Extensive water quality monitoring will be important in agriculturally dominated regions. The main objectives of this effort were to develop an approach to assess watershed condition and watershed vulnerability to land-use/landcover (LULC) change under multiple scenarios of future development. We used U.S. EPA’s Analytical Tools Interface for Landscape Assessment (ATtILA) to analyze landscape spatial data to determine the condition of wadeable, perennial stream watersheds in the Northwestern Great Plains level III ecoregion of …

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An Integrated Evaluation Of The Conservation Reserve Enhancement Program In South Dakota, Jarrett D. Pfrimmer Jan 2017

An Integrated Evaluation Of The Conservation Reserve Enhancement Program In South Dakota, Jarrett D. Pfrimmer

Electronic Theses and Dissertations

Grassland restoration efforts in North America typically share the goal of improving ecological conditions for wildlife; however, it is unclear in many cases if goals are met. The South Dakota Conservation Reserve Enhancement Program (CREP) was initiated to alleviate agriculturally-related environmental degradation by converting 40,469 hectares of eligible cropland and marginal pastureland to perennial vegetation. The program aims to provide habitat for obligate grassland breeding songbirds, while producing an additional 285,000 pheasants and 60,000 ducks annually. As part of a collaborative comprehensive evaluation effort, my research assessed the response of grassland-dependent breeding birds to CREP implementation at varying spatial scales …

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Encouraging Organic Agriculture: The Effects Of Conversion Subsidies, Sarah Adams Inkoom Jan 2017

Encouraging Organic Agriculture: The Effects Of Conversion Subsidies, Sarah Adams Inkoom

Electronic Theses and Dissertations

This thesis examines the importance of conversional subsidies in accounting for an increase in organic acreage in the 12 North-Central States in the United States. Monthly time series data that spans from January 2002 to December 2014 was used in the analysis. Empirical evidence suggests that increase in organic acreage is due in part to the availability of conversion subsidies. Without government assistance, most small-scale farmers are not sufficiently motivated to switch to organic production due to the high initial costs involved in transitioning. Further, increased institutional support could facilitate organic adoption and its absence is detrimental to increasing the …

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Health-Promoting Behaviors, Hope, And Health-Related Quality Of Life In Persons Impacted By Parkinson’S Disease, Amy K. Forbes Jan 2017

Health-Promoting Behaviors, Hope, And Health-Related Quality Of Life In Persons Impacted By Parkinson’S Disease, Amy K. Forbes

Electronic Theses and Dissertations

Objective: The purpose of the study was to determine the relationship between hope, health-promoting behaviors, and health-related quality of life (HRQOL) in persons with Parkinson’s disease.
Background: The incidence of Parkinson’s disease is high in Midwest and Northeast regions of the United States. Parkinson’s disease affects motor and non-motor symptoms and has a variety of complications. Parkinson’s disease is related to genetic and environmental factors. HRQOL decreases in Parkinson’s disease; thus, the effect of hope and health-promoting behaviors on health is crucial as the disease advances.
Methods: A descriptive correlational design was used to guide the study. A convenience sample …

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Advanced Carbon Materials Based Electrodes For High Performance Symmetric Supercapacitors, Keliang Wang Jan 2017

Advanced Carbon Materials Based Electrodes For High Performance Symmetric Supercapacitors, Keliang Wang

Electronic Theses and Dissertations

Supercapacitors have received considerable attention due to their high energy density, long life time, rapid charge/discharge rate, and because they are environmental friendly technology. Electrode materials play a key role in the final performance of supercapacitors. Carbon, usually used as symmetric supercapacitors electrode materials, exhibit extraordinary stability in harsh electrolyte and electrochemical performance owing to its physical and chemical properties. In addition, porous structure originated from activation, excellent electrical conductivity, sustainability, wide availability and low cost further offering the improvement in electrochemical performance and make it to be a promising electrode material for symmetric supercapacitors. Considering the factors affected electrochemical …

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Effects Of A Large-Scale Habitat Enhancement Project On Largemouth Bass Behavior, Feeding, And Growth In Grand Lake, Texas, Chance Kirkeeng Jan 2017

Effects Of A Large-Scale Habitat Enhancement Project On Largemouth Bass Behavior, Feeding, And Growth In Grand Lake, Texas, Chance Kirkeeng

Electronic Theses and Dissertations

The quality of habitat, or the environment suitable for an organism to survive and reproduce, is often described by the type of features present and the quantity and condition of such features. Habitats in many ecosystems are declining and the loss of important habitats likely affects the success of organisms reliant upon those features. Habitats in reservoir ecosystems are especially at risk because of aging processes that are degrading reservoir habitats at faster rates than habitats in other ecosystems. Habitat enhancement projects are one tool used to combat the effects of aging reservoirs but the benefits of these management actions …

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The Effects Of A Blend Of Essential Oils On Rumen Efficiency Of Lactating Dairy Cows, Kali Linville Jan 2017

The Effects Of A Blend Of Essential Oils On Rumen Efficiency Of Lactating Dairy Cows, Kali Linville

Electronic Theses and Dissertations

The objective of this study was to evaluate the effects of SS a blend of commercially available essential oils (EO) on rumen microbial efficiency and kinetics, and consequently, effects on production parameters of dairy cows fed a low-starch diet and in vitro analysis of varying doses of SS on ruminal fermentation at different stages of lactation. The study consisted of two experiments, the in vivo Experiment 1, was conducted on a commercial robotic dairy in southwest Minnesota outfitted with two Lely Astronaut A4robotic milking units (Goter’s Clay & Dairy Equipment of MN, INC., Pipestone, MN). One hundred-seven Holstein cows were …

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Effect Of Ultrasonication On Biofilm Forming Ability Of Common Dairy Sporeformers, Taghreed Almalki Jan 2017

Effect Of Ultrasonication On Biofilm Forming Ability Of Common Dairy Sporeformers, Taghreed Almalki

Electronic Theses and Dissertations

Sporeformers are common dairy contaminants, which are of a great concern to the dairy industry. Quality of dairy products is affected by these sporeformers such as Bacillus species, which are a significant cause of spoilage of dairy products. Thermal processes such as pasteurization have been used to inactivate pathogens, but some of the sporeformers and their endospores are resistant to such heat treatments. Beside thermal treatments, various new approaches are being developed to improve the quality of dairy products. Amongst these, ultrasonication is a promising non-thermal technique for the inactivation of thermoduric sporeformers and their endospores. Current study was carried …

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Relationship Of Stress, Sleep, Physical Activity, And Food Insecurity On Eating Behaviors And Obesity, Amy Lee Richards Jan 2017

Relationship Of Stress, Sleep, Physical Activity, And Food Insecurity On Eating Behaviors And Obesity, Amy Lee Richards

Electronic Theses and Dissertations

There is an urgent need to find effective interventions to prevent and reduce obesity as it is associated with chronic disease and decreased quality of life. Gaining a better understanding of how modifiable variables such as stress, sleep, physical activity, and food insecurity are related to eating behaviors associated with obesity is essential to guide the direction of future interventions and research. Interventions that hold promise need to be tested to determine if they have merit or not. This dissertation presents three papers. Two papers are cross-sectional studies evaluating associations between eating behaviors, obesity, and modifiable variables (stress, sleep, physical …

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Development And Properties Of Kernel-Based Methods For The Interpretation And Presentation Of Forensic Evidence, Douglas Armstrong Jan 2017

Development And Properties Of Kernel-Based Methods For The Interpretation And Presentation Of Forensic Evidence, Douglas Armstrong

Electronic Theses and Dissertations

The inference of the source of forensic evidence is related to model selection. Many forms of evidence can only be represented by complex, high-dimensional random vectors and cannot be assigned a likelihood structure. A common approach to circumvent this is to measure the similarity between pairs of objects composing the evidence. Such methods are ad-hoc and unstable approaches to the judicial inference process. While these methods address the dimensionality issue they also engender dependencies between scores when 2 scores have 1 object in common that are not taken into account in these models. The model developed in this research captures …

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Cardiovascular Risk, Remote Ischemic Postconditioning, And Endothelial Ischemia-Reperfusion Injury, Brian A. Hemenway Jan 2017

Cardiovascular Risk, Remote Ischemic Postconditioning, And Endothelial Ischemia-Reperfusion Injury, Brian A. Hemenway

Electronic Theses and Dissertations

Remote ischemic postconditioning (rIpost) is a potent vasculoprotective stimulus that is thought to reduce reperfusion injury associated with heart disease. However, certain animal models of cardiometabolic risk factors such as dyslipidemia, diabetes, and hypertension suggest the beneficial effects of rIpost to lessen reperfusion injury may be diminished. These findings have not been studied in clinically relevant humans. The aim of this study was to determine whether the protective effects of rIpost are reduced in the context of raised cardiometabolic risk in humans. Seven participants with raised cardiometabolic risk burden (age:57±7 years; BMI: 31±4kgm2participated in this 2X2 randomized cross-over …

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The Indirect Effect Of Bvdv On Immune Suppression: The Role Of Infected Macrophages In Lymphocyte Apoptosis, Karim Abdelsalam Jan 2017

The Indirect Effect Of Bvdv On Immune Suppression: The Role Of Infected Macrophages In Lymphocyte Apoptosis, Karim Abdelsalam

Electronic Theses and Dissertations

BVDV is an important pathogen of cattle that affects both the dairy and beef industry causing severe economic losses. The main problem of BVDV is the immune suppression that is associated with lymphoid depletion shortly post infection. The mechanism of this immune suppression is not well understood. In this in vitro study, we sought to determine the indirect effect of BVDV infection in macrophages as a key player in the pathogenesis of BVD especially, the apoptotic effect induced on lymphocytes. We infected bovine monocyte-derived macrophages (MDM) with either high or low virulent strains of cytopathogenic or non-cytopathogenic strains of BVDV …

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An Evaluation Of Deer And Pronghorn Surveys In South Dakota, Kristopher W. Cudmore Jan 2017

An Evaluation Of Deer And Pronghorn Surveys In South Dakota, Kristopher W. Cudmore

Electronic Theses and Dissertations

To properly manage white-tailed deer (Odocoileus virginianus), mule deer (Odocoileus hemionus), and the American pronghorn antelope (Antilocapridae americana), wildlife managers must identify population perimeters, sample size, age and sex ratios of these three species. The primary objective of this study was to evaluate age and sex ratios and determine a minimum sample size for each study area for all deer species and pronghorn, in addition to deriving a methodology and population estimate for white-tailed deer in the Black Hills. Sample size needed for both species of deer and pronghorn ranged from 60-70 groups of does. Age ratios calculated from daylight …

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Effects Of Phase Feeding During Gestation On Gilt Performance, Offspring Quality And Robustness, Agatha Ampaire Jan 2017

Effects Of Phase Feeding During Gestation On Gilt Performance, Offspring Quality And Robustness, Agatha Ampaire

Electronic Theses and Dissertations

A total of 51 gilts in 6 blocks were randomly assigned to one of 3 feeding regimens: Constant (Constant-f), 2.21 kg/d of a standard diet from breeding to d 112 of gestation (1.7 g Lys/kcal ME; 3276 kcal ME/kg); Bump feeding (Bump-f), the standard diet at 2.21 kg/d from breeding to d 89 and 2.61 kg/d from d 90 - 112; Phase feeding (Phase-f ), 2.21 kg/d from breeding to d 89 (1.5 g Lys/kcal ME; 3275 kcal ME/kg) and 2.61 kg/d from d 90 - 112 (2.1 g Lys/Kcal ME; 3290 Kcal ME/kg) over 2 reproductive cycles. Sows received …

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Understanding The Impacts Of Ammonia Fiber Expansion (Afex™) Pretreatment And Densification On Densified Products Quality And The Bioproducts Yield Through Enzymatic Hydrolysis And Fast Pyrolysis, Vijay Sundaram Jan 2017

Understanding The Impacts Of Ammonia Fiber Expansion (Afex™) Pretreatment And Densification On Densified Products Quality And The Bioproducts Yield Through Enzymatic Hydrolysis And Fast Pyrolysis, Vijay Sundaram

Electronic Theses and Dissertations

Lignocellulosic biomass poses significant challenges during handling, transportation, and storage due to its low bulk density. Densification involves conversion of the low bulk density biomass into a highly compacted product which helps in improving the handling, transporting, and storage obstacles associated with biomass logistics. Besides the logistical challenges, the recalcitrant nature of the lignocellulosic biomass makes it even more challenging during the enzymatic hydrolysis. The carbohydrate components, cellulose and hemicellulose are not readily accessible by the enzymes during the hydrolysis process due to the presence of lignin. Pretreatment is the process to convert the native recalcitrant biomass in the form, …

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Comprehensive Structural, Thermal And Toxicological Characterization Of 1-Ethyl-3-Methylimidazolium Alkylbenzenesulfonate Ionic Liquids, Hiranmayee Kandala Jan 2017

Comprehensive Structural, Thermal And Toxicological Characterization Of 1-Ethyl-3-Methylimidazolium Alkylbenzenesulfonate Ionic Liquids, Hiranmayee Kandala

Electronic Theses and Dissertations

Synthesis and characterization of 1-ethyl-3- methylimidazolium alkylbenzenesulfonate ionic liquids for extraction of lignin from prairie cord grass have been studied. The ionic liquids (ILs) 1-ethyl-3- methylimidazolium benzenesulfonate (EBS), 1-ethyl-3- methylimidazolium toluenesulfonate (ETS) and 1-ethyl-3- methylimidazolium xylenesulfonate (EXS) have been synthesized in this research. An extensive structural, physical, thermal and toxicological characterization has been performed to understand the behavior of these ionic liquids. The reaction yield for the synthesis of EBS, ETS, and EXS ionic liquids was determined to be 91.2 ± 1.5 %, 96.1 ± 0.7 %, 99.0 ± 0.5 % respectively. Spectral analysis using NMR and FTIR confirms the …

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Indexing Walleye Recruitment In Eastern South Dakota Natural Lakes, Todd M. Kaufman Jan 2017

Indexing Walleye Recruitment In Eastern South Dakota Natural Lakes, Todd M. Kaufman

Electronic Theses and Dissertations

Because of the popularity of Walleyes and the need for recurrent supplemental stockings, substantial resources are allocated to their management in eastern South Dakota. For nearly 20 years, fall night electrofishing has been used to monitor age-0 Walleye population parameters, and index future year-class strength in select waters but with limited evaluation. Additionally, knowledge of recruitment patterns and factors that influence those patterns were of interest. Thus, the objectives of this study were: 1) to determine the utility of fall electrofishing age-0 Walleyes to index future year-class strength; 2) to explore whether measures of fall age-0 body size or condition …

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The Relationship Between Recollection, Knowledge Transfer, And Student Attitudes Towards Chemistry, Oluwatobi Omobonike Odeleye Jan 2017

The Relationship Between Recollection, Knowledge Transfer, And Student Attitudes Towards Chemistry, Oluwatobi Omobonike Odeleye

Electronic Theses and Dissertations

Certain foundational concepts, including acid-base theory, chemical bonding and intermolecular forces (IMFs), appear throughout the undergraduate chemistry curriculum. The level of understanding of these foundational concepts influences the ability of students to recognize the relationships between sub-disciplines in chemistry. The purpose of this study was to investigate the relationship between student attitudes towards chemistry and their abilities to recollect and transfer knowledge of IMFs, a foundational concept, to their daily lives as well as to other classes. Data were collected using surveys, interviews and classroom observations, and analyzed using qualitative methods. The data show that while most students were able …

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Intranasal Immunization Of Pigs With Porcine Reproductive And Respiratory Syndrome Virus Like Particles Plus 2’, 3’ –Cgamp Vaccigrade™ Adjuvant Exacerbates Viremia After Virus Challenge, Alexandria Marie Van Noort Jan 2017

Intranasal Immunization Of Pigs With Porcine Reproductive And Respiratory Syndrome Virus Like Particles Plus 2’, 3’ –Cgamp Vaccigrade™ Adjuvant Exacerbates Viremia After Virus Challenge, Alexandria Marie Van Noort

Electronic Theses and Dissertations

Porcine reproductive and respiratory syndrome virus (PRRSV) is an economically devastating virus that causes a persistent infection and spreads quickly. The virus causes abortions in sows and respiratory diseases in young piglets. Current PRRSV vaccines appear to provide limited cross-protection. A virus-like particles (VLPs) vaccine is made up of key PRRSV structural proteins, which could be cross protective among the different strains. We tested PRRSV VLPs as a vaccine candidate with a 2’, 3’-cGAMP VacciGradeTM adjuvant against pigs infected with PRRSV after intranasal immunization to evaluate the immune response and protective efficacy by the VLPs and adjuvant. The VLPs contain …

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Activated Carbon Preparation And Modification For Adsorption, Yuhe Cao Jan 2017

Activated Carbon Preparation And Modification For Adsorption, Yuhe Cao

Electronic Theses and Dissertations

Butanol is considered a promising, infrastructure-compatible biofuel. Butanol has a higher energy content than ethanol and can be used in conventional gas engines without modifications. Unfortunately, the fermentation pathway for butanol production is restricted by its toxicity to the microbial strains used in the process. Butanol is toxic to the microbes, and this can slow fermentation rates and reduce butanol yields. Gas stripping technology can efficiently remove butanol from the fermentation broth as it is produced, thereby decreasing its inhibitory effects. Traditional butanol separation heavily depends on the energy intensive distillation method. One of the main issues in acetone-butanol-ethanol fermentation …

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Surveillance Of Emerging Livestock Viruses, Faten A. Okda Jan 2017

Surveillance Of Emerging Livestock Viruses, Faten A. Okda

Electronic Theses and Dissertations

Accurate and rapid diagnostic tests are essential for the management and control of emerging infectious diseases. Therefore, the overall goals of studies presented in this dissertation were to provide improved diagnostic and surveillance capabilities for several emerging viral diseases impacting the livestock industry and to provide insight into appropriate control strategies. Recent, severe outbreaks of porcine epidemic diarrhea virus (PEDV) in Asia and North America highlighted the need for well-validated diagnostic tests for identification of PEDV infected animals and evaluation of their immune status. PEDV was first detected in the U.S. in May 2013 and another swine coronavirus, porcine deltacoronavirus …

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Design, Synthesis And Biological Screening Of Novel Cucsinspired Estrone Analogues Towards Treatment Of Hepatocellular Carcinoma, Mater Hussen Mahnashi Jan 2017

Design, Synthesis And Biological Screening Of Novel Cucsinspired Estrone Analogues Towards Treatment Of Hepatocellular Carcinoma, Mater Hussen Mahnashi

Electronic Theses and Dissertations

Cucurbitacins (CUCS) are natural products with highly oxygenated tetracyclic triterpenes produced mostly by Cucurbitaceae family plant. They are known for their therapeutic efficiency with different biological activities, such as anti-inflammatory, hepatoprotective and anti-cancer. Hepatocellular carcinoma (HCC) is the third leading cause of death worldwide. Previous reports have shown the ability of CUCS to inhibit the growth of hepatocellular carcinoma cell lines (HepG-2) significantly. Structural activity relationship studies suggested the potential of the 23, 24 enone side chain of CUCS to bind to the Epidermal Growth Factor Receptor (EGFR). Due to the limited quantities of CUCS upon isolation and the challenges …

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Lignin Transformation And Characterization Of Pyrolytic Products, Eric Amo Boakye Jan 2017

Lignin Transformation And Characterization Of Pyrolytic Products, Eric Amo Boakye

Electronic Theses and Dissertations

Lignocellulosic materials derived from plants have the ability to serve as feedstocks in place of depleting petroleum and coal for production of fuels and chemicals. Lignin forms about 30% of lignocellulosic material, and is the second most abundant non-fossil organic carbon source in the biosphere. However, it is often treated as waste or, in some instances, burned to supply energy. Developing an efficient and environmentally benign method to convert lignin to high value-added aromatic monomers (e.g., guaiacol, vanillin, acetovanillone, and eugenol) for synthesis of polymers is of interest. Mineral bases, such as NaOH and CsOH, or supported-metal catalysts (Pt, Ru, …

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Design, Synthesis And Biological Evaluation Of Novel Estradiol-Triazole Analogs Targeting Epidermal Growth Factor Receptors In Colorectal Cancer, Faez Alotaibi Jan 2017

Design, Synthesis And Biological Evaluation Of Novel Estradiol-Triazole Analogs Targeting Epidermal Growth Factor Receptors In Colorectal Cancer, Faez Alotaibi

Electronic Theses and Dissertations

Colorectal cancer is a life threatening and second cause of death from cancer in the United States. Several proteins (molecular targets) are highly expressed in Colorectal cancer (CRC). Among these molecular targets is Epidermal Growth Factor Receptors (EGFRs) which are overexpressed in cancer cells. Targeting and blocking the downstream signaling could lead to cease cell proliferation and division and hence control the spread of the disease. Molecular modeling is a powerful tool in drug discovery, which has been utilized to design many drug candidates that exhibit biological effect in many disease including cancer. Additionally, pharmacophores such as 1,2,3-triazole showed potency …

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Diaporthe, Soybean Cyst Nematode, And Soybean Aphid: An Evaluation Of Potential Interactions Occurring Among Pests On Soybean In South Dakota, John Philip Posch Jan 2017

Diaporthe, Soybean Cyst Nematode, And Soybean Aphid: An Evaluation Of Potential Interactions Occurring Among Pests On Soybean In South Dakota, John Philip Posch

Electronic Theses and Dissertations

Soybean Glycine max (L.) Merr., is an important crop grown in South Dakota, with an estimated production of $2.33 billion in 2015. However, soybean production in South Dakota is compromised by four pests, the fungal pathogens Diaporthe longicolla (Hobbs) Santos, Vrandecic, and Phillips and Diaporthe caulivora (Athow and Caldwell) Santos, Vrandecic, and Phillips, the soybean cyst nematode Heterodera glycines Ichinohe (SCN), and the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae). Additionally, these pest can co-occur in fields within South Dakota and the implications associated with interactions among these pests are unknown. We hypothesized that both Diaporthe species would interact with …

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Funding Of Higher Education: Variations In State Funding, Impacts Of State Funding On Differential Tuition, And Variables Impacting Differential Tuition, Michael Holbeck Jan 2017

Funding Of Higher Education: Variations In State Funding, Impacts Of State Funding On Differential Tuition, And Variables Impacting Differential Tuition, Michael Holbeck

Electronic Theses and Dissertations

Public higher education in the United States has seen many changes since the Morrill Act of 1862. Specifically, the funding of higher education has changed greatly over the last half century, from very low tuition and relatively high state subsidies to an increased reliance on tuition to fund higher education. While this funding change has been the national trend, the impact on specific states and universities has varied greatly. This study examines the funding variation between university peers, normalized using state general funds per resident student FTE, to analyze the variation of state funding between states as well as the …

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Phytophthora Sojae Infecting Soybean: Pathotype Diversity, New Sources Of Resistance And Interaction With The Soybean Cyst Nematode, Rawnaq Nazneen Chowdhury Jan 2017

Phytophthora Sojae Infecting Soybean: Pathotype Diversity, New Sources Of Resistance And Interaction With The Soybean Cyst Nematode, Rawnaq Nazneen Chowdhury

Electronic Theses and Dissertations

Phytophthora root and stem rot, caused by Phytophthora sojae Kaufmann and Gerdemann, is an important disease of soybean (Glycine max L.) in South Dakota. To gain a better understanding of the importance of P. sojae in South Dakota, specifically pathotype diversity, identification of new resistance sources and the interaction with the soybean cyst nematode (Heterodera glycines Ichinohe, SCN), this research was undertaken with the following objectives - 1) to characterize the pathotype diversity of P. sojae causing Phytophthora root and stem rot on soybean in commercial fields in South Dakota; 2) to compare inoculation methods to evaluate for …

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Nickel Reduces Calcium Dependent Dimerization In Neural Cadherin, Matthew Paul Dukes Jan 2017

Nickel Reduces Calcium Dependent Dimerization In Neural Cadherin, Matthew Paul Dukes

Electronic Theses and Dissertations

Cadherins are the primary transmembrane component in adherens junctions, structures that link the actin cytoskeleton in adjacent cells within solid tissues including neurological synapses, epithelium and endothelium. Cell-cell adhesion by cadherins requires the binding of calcium ions to specific sites in the extracellular region. Given the complexity of the cell adhesion microenvironment, we are investigating whether other divalent cations might affect calciumdependent dimerization of neural-(N-) cadherin. The first chapter focuses on studies to characterize the impact of binding physiological magnesium (II) or neurotoxic nickel (II) on calcium-dependent N-cadherin function. Physiological levels of magnesium have only a small effect on the …

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Beyond Isolation: The Mississippi Delta In A Global World, Stella D. Lindsey Jan 2017

Beyond Isolation: The Mississippi Delta In A Global World, Stella D. Lindsey

Electronic Theses and Dissertations

This study examines the paradoxes and complexities of the Mississippi Delta through an international lens. The fundamental premise guiding the research is that goods, people, ideas, technology, and capital cross national borders; therefore, local transformations can only be fully understood within a global context. The study concentrates on the evolution of the reciprocal, complex relationship between the region and the international community, along with the local and global consequences of a series of transnational exchanges. With a primary focus on agribusinesses, the research challenges traditional visions of the Delta as an isolated and provincial region immune to modernization. Instead the …

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