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Articles 271 - 300 of 3160
Full-Text Articles in Life Sciences
Do American Bison Practice Democracy? Group Consensus Decision Making Drives Bison Herd Movements And Cohesion., Matthew Sapien
Do American Bison Practice Democracy? Group Consensus Decision Making Drives Bison Herd Movements And Cohesion., Matthew Sapien
Electronic Theses and Dissertations
The American bison is an iconic mammal that lives in large social herds and is considered a threatened species. Little is known about how bison make decisions as a group, whether through despotic individuals or group consensus. In this dissertation, I researched the mechanisms bison use to make herd movement decisions in 3 herds in the United States. In chapter one I examined the number of bison that participated in voting events for herd movement decisions and whether the final movement decision matched the direction with the most votes. Bison herd movements did match the direction with the most adult …
Relationships Between Fitness Levels, Physical Activity Participation, Hemoglobin A1c Levels, And Motor Proficiency In Adolescent Patients With Type 1 Diabetes., Caroline E. Frye
Relationships Between Fitness Levels, Physical Activity Participation, Hemoglobin A1c Levels, And Motor Proficiency In Adolescent Patients With Type 1 Diabetes., Caroline E. Frye
Electronic Theses and Dissertations
Physical activity is a critical component of a healthy lifestyle and can lead to improved fitness levels and blood glucose management, as well as decreased HbA1c levels. PURPOSE: The purpose of this study was to determine if there are relationships between cardiorespiratory fitness, muscular strength, muscular endurance, flexibility, body composition, physical activity participation, hemoglobin A1C levels, and motor proficiency in adolescent patients with T1D. METHODS: Pediatric patients with a diagnosis of T1D enrolled in a sports medicine program were invited to participate in this study. Retrospective clinical chart reviews were conducted to determine participant’s sociodemographic and anthropometric measures and most …
An Investigation Into The Structural Features That Control Factor Xiii Stability And Substrate Specificity., Rameesa Darul Amne Syed Mohammed
An Investigation Into The Structural Features That Control Factor Xiii Stability And Substrate Specificity., Rameesa Darul Amne Syed Mohammed
Electronic Theses and Dissertations
Factor XIII (FXIII) is a transglutaminase enzyme with multiple physiological roles that is found in plasma and cells of bone marrow origin. The catalytic A subunit (FXIII-A) is made of an N-terminal activation peptide (AP), β-sandwich, catalytic core, and two β-barrel domains. FXIII crosslinks the sidechains of glutamine (Q) and lysine (K) residues across plasmatic and cellular substrates. Because of its involvement in clot stabilization and determining fibrin clot size, FXIII-A is regarded as a target for developing new anticoagulants with minimal bleeding risks. However, the FXIII-A structural features that control its stability and substrate specificity largely remain unknown. Plasma …
Characterization Of The Role Of Tobacco Deacetylase Enzyme Sip-428 In Mediating Environmental Stress, Zahra Barati
Characterization Of The Role Of Tobacco Deacetylase Enzyme Sip-428 In Mediating Environmental Stress, Zahra Barati
Electronic Theses and Dissertations
Abiotic stress poses a significant threat to crop productivity and food security. In this study, we focused on understanding the role of SIP-428, a SABP2-interacting protein, in mediating plant responses to environmental stresses. Transgenic tobacco plants overexpressing SIP-428 were subjected to salinity and drought stress. The overexpression of SIP-428 led to diminished growth under both stress conditions, indicating a negative impact on stress tolerance. Specifically, SIP-428 overexpression resulted in a reduction in catalase activity, while peroxidase activity remained unaffected. These findings suggest that SIP-428 plays a negative regulatory role on the catalase activity during abiotic stress, which may contribute to …
Evaluating A Current Athlete Assessment Program, David Fish
Evaluating A Current Athlete Assessment Program, David Fish
Electronic Theses and Dissertations
The primary purpose of this dissertation is to evaluate the effectiveness of a questionnaire designed to assess coaches’ perceptions of an athlete monitoring program. There are four reasons for this examination of perceptions: 1) it may serve as a check for understanding of how the coach takes in the information presented to them, 2) identify any gaps in the knowledge of the coach which the sport scientist may help to fill, 3) can serve to open a dialog with the coach for ways in which the information may be better tailored to help them improve their decision-making, and 4) the …
Development And Evaluation Of A Retrofittable Variable Rate Applicator Controller, Ahmed Abdalla
Development And Evaluation Of A Retrofittable Variable Rate Applicator Controller, Ahmed Abdalla
Electronic Theses and Dissertations
The need to optimize resource utilization while increasing crop productivity is paramount. This research proposes a Low-cost Retrofittable Variable Rate Applicator Controller (VRAC) that aims to leverage the adoption of Variable Rate Technologies. The controller operates via the Raspberry Pi platform, a Global Positioning System (GPS), a stepper motor drive, and an anti-slip wheel encoder. The VRAC allows precise, on-the-fly control of variable-rate application of farming inputs. It utilizes GPS with 10 cm accuracy to pinpoint geographic coordinates in real-time. A wheel encoder measures traveling speed with a slip-resistant wheel design for precise RPM readings. The Raspberry processes the data, …
Monarch Butterfly (Danaus Plexippus) Oviposition Preferences And A Survey Of Fungal Pathogens On Native Milkweeds (Asclepias) Of The Northern Great Plains, Grace Damiano
Electronic Theses and Dissertations
North American monarch butterfly (Danaus plexippus) populations are experiencing significant declines due to habitat loss caused by land use changes. Much of the American Midwest where milkweed, the only host plant of the monarch butterfly, was once much more abundant has been converted to a predominantly agricultural landscape. There are nineteen species of milkweed native to the northern Great Plains region occupied by South Dakota, North Dakota, and Minnesota. Some of these milkweed species may be preferable to monarch butterflies for different reasons, including morphological factors such as stem length, species-level chemical factors, and temporal factors. As monarch …
Competition Between Bradyrhizobium Strains For Soybean Nodulation, Lilia Ernestina Montanez Hernandez
Competition Between Bradyrhizobium Strains For Soybean Nodulation, Lilia Ernestina Montanez Hernandez
Electronic Theses and Dissertations
Biological Nitrogen Fixation (BNF) has surged as a natural strategy to provide available nitrogen to crops by taking advantage of diazotrophs, microorganisms that can reduce atmospheric nitrogen to ammonia. Soybean, a major crop, greatly benefits from BNF by forming endosymbiotic relationships with rhizobacteria from the genus Bradyrhizobium, which culminates in the formation of specialized organs called nodules, where nitrogen fixation occurs. This is known as Symbiotic Nitrogen Fixation (SNF). Inoculation of soybean fields with high nitrogen fixing Bradyrhizobium strains to stimulate SNF is being used as a strategy to increase crop productivity and nitrogen content. However, in North America, SNF …
Nitrogen Application Timing And Cereal Rye (Secale Cereale L.) Cover Crop Influence Greenhouse Gas Emissions, Graig Reicks
Nitrogen Application Timing And Cereal Rye (Secale Cereale L.) Cover Crop Influence Greenhouse Gas Emissions, Graig Reicks
Electronic Theses and Dissertations
Dryland contributions to greenhouse gas (GHG) emissions are increased by N fertilizer applications and high soil water contents. Fertilizer timing and spring growth of cover crops prior to cash crop planting were investigated in separate studies to examine impacts on overall GHG emissions using a near continuous measurement system. There was a significant interaction between N fertilizer rate (0 vs. 224 kg N ha-1 surface-applied as urea) and application date (p= 0.01) for CO2 emissions. This interaction occurred because N fertilizer increased CO2 emissions by 35% for the 21 d interval following early spring application. When application was delayed until …
Primary Cilia And Intraflagellar Transport Are Essential Regulators Of Lymphangiogenesis And Modulate Cellular Trafficking Of Ve-Cadherin, Delayna Paulson
Primary Cilia And Intraflagellar Transport Are Essential Regulators Of Lymphangiogenesis And Modulate Cellular Trafficking Of Ve-Cadherin, Delayna Paulson
Electronic Theses and Dissertations
No abstract provided.
Physicochemical And Functional Properties Of Different Varieties Of Spring And Winter Peas Of South Dakota, Prakriti Dhakal
Physicochemical And Functional Properties Of Different Varieties Of Spring And Winter Peas Of South Dakota, Prakriti Dhakal
Electronic Theses and Dissertations
Peas are a good source of nutrients for both humans and animals, and they are the world's second most significant and sustainable legume. There have been studies on different kinds of pea grown in other parts of the world, but there is no information on the compositional and functional characteristics of pea varieties grown specifically in South Dakota. The objective of the study was to evaluate the proximate composition and functional properties of various pea varieties and determine if the pea variety impacted cookie properties. The proximate composition (moisture, protein, starch, and amylose), functional capacities (water holding, oil holding capacity, …
Developing Machine Learning Models For Selection Of Management Zones, Sravanthi Bachina
Developing Machine Learning Models For Selection Of Management Zones, Sravanthi Bachina
Electronic Theses and Dissertations
Soil sampling and analyses play a crucial role in optimizing nutrient management and enhancing crop productivity. However, collecting representative samples across diverse landscapes is challenging due to knowledge gaps about spatial variability of soil properties, large fields, multiple samples, and analysis costs. Collecting soil samples based on the management zones can help farmers gather precise information about soil properties with fewer samples. Recent developments in precision agriculture and machine learning. This study aimed to develop machine learning models that can learn, analyze, and refine landscape and soil properties data for automated selection of soil sampling zones and generating prediction maps. …
Species Distribution Modeling Of Aquilegia Brevistyla (Ranunculaceae): A Critically Imperiled Black Hills Disjunct Species, Eric Daniel Puetz
Species Distribution Modeling Of Aquilegia Brevistyla (Ranunculaceae): A Critically Imperiled Black Hills Disjunct Species, Eric Daniel Puetz
Electronic Theses and Dissertations
Unchecked human activity is contributing to rising levels of greenhouse gas emissions, changes in land use, altered disturbance/fire regimes, spread of invasive species, and loss of biological diversity and related breakdown of ecosystem services. Additionally, climatic shifts may lead to phenological mismatches between species and their environments if these changes outpace a species’ ability to adapt or migrate to a more suitable habitat. Isolated mountain populations are particularly threatened by unpredictable climatic conditions, as they may have limited migration corridors and often lower levels of genetic diversity to move or adapt, respectively. As these negative feedbacks compound on the landscape, …
The Hutton Project: Long-Term Agricultural Impacts On Soil Loss And Carbon Dynamics In Eastern South Dakota, Eli Halverson
The Hutton Project: Long-Term Agricultural Impacts On Soil Loss And Carbon Dynamics In Eastern South Dakota, Eli Halverson
Electronic Theses and Dissertations
Long-term and intensified agricultural land management has resulted in increased rates of soil erosion and has altered much of the carbon cycle at regional and global scales. Anthropogenic degradation of soil resources is a barrier to sustainable production, soil functioning, and ecosystem services. It is difficult to quantify the scope of pedogenic changes due to the lack of legacy data and short temporal scales. This study utilized decades to century-old soil information to quantify historical soil erosion losses and changes in soil carbon pools of eastern South Dakota soils. The results show that soils in the region have been significantly …
The Effects Of Temperature, Flooding, And Goose Feces Addition On Greenhouse Gas Emissions And Ammonification In Four High-Latitude Soils From Western Alaska, Jenna M. Ross
Electronic Theses and Dissertations
The large carbon (C) stock of wetlands is vulnerable to climate change, especially in high latitudes that are warming at a disproportional rate. Likewise, low-elevation Arctic coastal areas will flood more frequently under climate change and sea-level rise, which may alter goose herbivory and fecal deposition patterns if geese move inland. While temperature, flooding, and feces impact soil C emissions, their interactive effects have been rarely studied. Here, I explore the impact of these interactions on CO2 and CH4 emissions and nitrogen (N) mineralization (ammonification) in soils collected from four plant communities in the Yukon-Kuskokwim (Y-K) Delta, a high latitude …
Plant Pathways Associated With Competition For Soybean Root Colonization By Bradyrhizobium Strains, Athira Sethu Madhavan
Plant Pathways Associated With Competition For Soybean Root Colonization By Bradyrhizobium Strains, Athira Sethu Madhavan
Electronic Theses and Dissertations
Nitrogen is a crucial nutrient for the growth and development of plants. Legume crops like soybeans develop symbiotic associations with soil bacteria from the genus, Bradyrhizobium to obtain fixed nitrogen. In this mutualistic association, rhizobia are released into root nodules that provide a compatible environment for rhizobia to grow and fix nitrogen (Symbiotic Nitrogen Fixation (SNF)). A caveat in such beneficial associations is the competition between different rhizobium strains in soil for infection and nodule occupancy. The elite inoculant strains encounter competition by indigenous rhizobial population in the soil to infect and nodulate a susceptible legume host, because of which …
Movement Ecology Of Paddlefish And Walleye Reveal The Importance Of Continued Interjurisdictional Management In Riverine And Lacustrine Systems, Kaitlyn Bearden
Movement Ecology Of Paddlefish And Walleye Reveal The Importance Of Continued Interjurisdictional Management In Riverine And Lacustrine Systems, Kaitlyn Bearden
Electronic Theses and Dissertations
Fisheries systems function at broad spatial and temporal scales. Fishes within these systems are often highly mobile and move to locate adequate habitat, to feed and reproduce. As individuals navigate their environment, they potentially cross regulatory boundaries (state or federal) and or encounter physical barriers such as dams. Regulatory boundaries may not physically impede fish movement, but they are visible to fisheries managers thus the fishes within them may be vulnerable to varying management and harvest regulations. Physical boundaries (e.g., dams) are also particularly problematic for highly mobile species in large river systems. In chapter two, I documented that apparent …
Feeding Isoacids To Swine: Inclusion Level And Interactions With Dietary Fiber And Protein, Angie Patricia Benavides Infante
Feeding Isoacids To Swine: Inclusion Level And Interactions With Dietary Fiber And Protein, Angie Patricia Benavides Infante
Electronic Theses and Dissertations
In animal production, research is continually being carried out into implementing new feeding strategies, such as incorporating new alternative ingredients or additives that improve the quality of the diet, reduce the cost of diets, or have effects on intestinal health. The inclusion of branched-chain volatile fatty acids has been investigated in ruminants, and it has been found that a diet supplemented with BCVFA increases fiber digestibility as well as increases cellulolytic bacteria in the rumen. There is little information about the possible effects on pigs supplemented with BCVFA. According to this, the first study aims to evaluate the optimal inclusion …
Effects Of Low-Cost, Low-Tech Tools For Riparian Restoration On Prairie Streams In Western South Dakota, James Andrew Joseph Bolyard
Effects Of Low-Cost, Low-Tech Tools For Riparian Restoration On Prairie Streams In Western South Dakota, James Andrew Joseph Bolyard
Electronic Theses and Dissertations
Despite making up less than two percent of the overall landscape in the arid and semi-arid western US, riparian areas are a crucial resource for agriculture, livestock, and wildlife. However, many have impaired function and reduced riparian cover. Low-Cost, Low-Tech Tools (LCLTT) are a subset of Process-Based Restoration (PBR) used for riparian restoration that were chosen for their cost-effectiveness and minimal technical requirements. LCLTT has been tested in mountainous areas of the western US but only recently implemented in the Northern Great Plains (NGP). Given their novelty as an approach toward restoration for the region, professional restoration and landowner communities …
Near-Real-Time Monitoring Of Crop Progress At Field Scales By Fusing Observations From Both Polar-Orbiting And Geostationary Satellites, Yu Shen
Electronic Theses and Dissertations
No abstract provided.
Development Of Innovative Flocculation Technologies For Agricultural Water Treatment, Noor Haleem
Development Of Innovative Flocculation Technologies For Agricultural Water Treatment, Noor Haleem
Electronic Theses and Dissertations
The development of innovative flocculation technologies is essential for addressing the challenges of agricultural water treatment. These technologies play a crucial role in removing contaminants such as suspended solids and nutrients, thereby ensuring safer water for irrigation and livestock consumption. By enhancing water quality and wastewater management, they contribute significantly to environmental sustainability and public health in agricultural communities. This comprehensive thesis extensively explores various dimensions of flocculation, with a focused effort on methodologies and resources aimed at strengthening sustainability and efficiency. A pivotal aspect of the research involves synthesizing cationic starch (CS), a flocculant derived from an underutilized resource, …
Advancing Biological Applications Through Microfluidic-Based Tool Development, K.M. Taufiqur Rahman
Advancing Biological Applications Through Microfluidic-Based Tool Development, K.M. Taufiqur Rahman
Electronic Theses and Dissertations
This research undertook an interdisciplinary approach, integrating bioengineering, microbiology, molecular biology, and systems biology to investigate bacterial dynamics behavior. Specifically, it delved into the development of microfluidic devices for biological applications such as bacterial cell counts, real-time observation of plant roots (here, specialized lectin-coated microbeads are used that mimic root characteristics), and soil microbe interactions. Furthermore, Next-Generation Sequencing and systems biology methodologies were employed to explore the intricate, multifaceted survival mechanisms of Escherichia coli persister population. Studying and quantifying persisters or testing for the existence of VBNC (viable but nonculturable) is challenging. These experiments require precise counts. It has been …
The Relationship Of Macronutrient Intake With Growth In Children With Type 1 Diabetes Mellitus, Jessica L. Freeling
The Relationship Of Macronutrient Intake With Growth In Children With Type 1 Diabetes Mellitus, Jessica L. Freeling
Electronic Theses and Dissertations
Child growth, a sensitive metric of overall health, results from the intricate interplay of nature and nurture. While the importance of nutrition in child growth is well established, growth trajectories exhibit substantial individual variability, influenced by sex and age, and often characterized by nonlinear patterns. Inadequate nutrition or disease can hinder growth, with potential for recovery upon proper nutrition or acute disease resolution. However, chronic disease or persistent malnutrition may lead to permanent growth perturbation. Notably, before the advent of insulin, chronic stunting and wasting were hallmarks of Type 1 diabetes mellitus (T1DM), though the specific impacts under modern standard …
Plant Available Water Drives Semi-Arid Forage Quality And Quantity In A Common Garden Greenhouse Experiment, Parker J. Witt
Plant Available Water Drives Semi-Arid Forage Quality And Quantity In A Common Garden Greenhouse Experiment, Parker J. Witt
Electronic Theses and Dissertations
Rangeland forage nutrition and biomass production are integral components of sustainable livestock grazing systems and are controlled by soil quality and precipitation. I examined the effects of precipitation on growth and nutrition of three forage species in four different soils that span the longitudinal moisture gradient in South Dakota. I grew little bluestem (Schizachyrum scoparium), western wheatgrass (Pascopyrum smithii), and smooth brome (Bromus inermis) in soils representing the eastern tallgrass/mid-grass prairie (Brookings, 700 mm avg. precipitation.), an eastern mid-grass prairie (Highmore, 550 mm avg. precipitation.), a western mid-grass prairie (Cottonwood, 450 mm avg. precipitation.), and a western mid-grass/short-grass prairie (Sturgis, …
The Influence Of By-O-Reg+ Beef, An Oregano-Based Essential Oil Supplement, On Growth Performance, Carcass Traits And Meat Quality Of Finishing Beef Steers, Bergin Mackenzie Debruin
The Influence Of By-O-Reg+ Beef, An Oregano-Based Essential Oil Supplement, On Growth Performance, Carcass Traits And Meat Quality Of Finishing Beef Steers, Bergin Mackenzie Debruin
Electronic Theses and Dissertations
The objective of this thesis was to determine the influence of an oregano-based essential oil (OEO; By-O-Reg+ Beef), on growth performance, carcass traits, and meat quality of beef steers finished in an all-natural program. Yearling steers were allotted to 16 pens (n = 8 pens per treatment, 8 steers per pen). Treatments included: 1) control (CON) fed no oregano-based essential oil and 2) group fed 4 g/steer daily of By-O-Reg+ Beef. Steers were harvested on day 149 of the feeding period. Standard carcass data was collected and instrumental color (L*, a*, b*) was recorded. Strip loins were collected from a …
Understanding Angler Responses To Fish Stocking Programs Across South Dakota, Riley L. Mounsdon
Understanding Angler Responses To Fish Stocking Programs Across South Dakota, Riley L. Mounsdon
Electronic Theses and Dissertations
Fisheries management is a complex process that often requires consideration of many factors to be implemented effectively. Stocking is one of the most often used fisheries management techniques for addressing a myriad of issues in the fisheries field. Stocking is also one of the largest expenses for many fisheries management agencies. Due to license sale declines, management actions including stocking, are being evaluated by many agencies to determine if there are ways to improve efficiency and effectiveness to reduce costs and enhance angler participation. For my second chapter, I evaluated the current fish stocking decision-making process within South Dakota Game, …
Nutrient Intake, Performance, And Body Composition In Preseason Wrestlers, Gregory Coapstick
Nutrient Intake, Performance, And Body Composition In Preseason Wrestlers, Gregory Coapstick
Electronic Theses and Dissertations
BACKGROUND: College athletes, especially in weight class sports, often experience energy deficits. Weight class sports such as wrestling are at greatest risk for deficiencies, and little is known about the relationships between body composition, nutrient intake, and performance in these athletes.
OBJECTIVES: The purposes of this study were to quantify macronutrient and micronutrient intake of pre-season male collegiate wrestlers and compare to recommendations, and examine relationships among nutritional intakes, body composition, and performance measurements of strength, anaerobic, and aerobic capacity.
METHODS: Male Division I wrestlers (n=11, mean ± SD age: 21.3±1.7 years, wrestling experience: 14.9±2.5 years) were recruited during preseason. …
Influence Of Reduced Salt In Fully Cooked Ham And Sausage Cured With Natural Celery Powder On The Growth Of Listeria Monocytogenes At 4⁰C, Anne Sherod
Electronic Theses and Dissertations
This research evaluated the influence of reducing salt on outgrowth of L. monocytogenes on ready to eat (RTE) deli-style sliced ham cured with natural celery powder, fully cooked sausage links cured with traditional sodium nitrite and sausage links cured with natural celery powder, vacuum packaged and stored at 4⁰C on the outgrowth of L. monocytogenes. Experiment 1 evaluated L. monocytogenes outgrowth on ham over 153 days on the following treatments, current retail ham (HC) 2.0% salt; reduced salt 1 (HRS1) 1.5% salt; reduced salt 2 (HSR2) 1.35% salt; and reduced salt 2 without antimicrobials (HRS2WA) 1.35% salt without potassium lactate …
Various Surfactant Soil Conditioner Effect On Plant Nutrient Concentration, Soil Nutrient Depletion, Soil Volumetric Water Content, Plant Biomass And Yield In Corn, Timothy Veldkamp
Electronic Theses and Dissertations
Soil conditioners help improve soil structure by increasing aeration, water infiltration and water holding capacity leading to nutrient availability and reduced irrigation needs. The goal of this study was to evaluate the impact of multiple soil conditioners (SC1, SC2, SC3, SC4, and SC5) on corn (Zea mays L.) and their ability to reduce irrigation by 30%. This was evaluated in the field in 2022 and 2023 by Aurora, SD using a Randomized Complete Block Design with six replications. Conditioners were applied as broadcast pre-emergence treatments with 70% irrigation. Control treatments of 70% and 100% irrigation, respectively were included. SC1 application …
Role Of Production Systems On Carcass And Palatability Attributes Of Bison, Lydia Margaret Hite O'Sullivan
Role Of Production Systems On Carcass And Palatability Attributes Of Bison, Lydia Margaret Hite O'Sullivan
Electronic Theses and Dissertations
The overall objective of this dissertation was to determine the impact of finishing systems on carcass and palatability attributes of bison. The specific objectives were 1) determine the influence of finishing system (grain-finished vs. grass-finished) on the mechanisms of tenderness formation in the longissimus lumborum of bison bulls, 2) determine the influence of diverse finishing systems on carcass characteristics and proximate composition of bison heifers, and 3) determine the influence of diverse finishing systems on palatability of striploin steaks from bison heifers. Results indicate that finishing systems differentially influence carcass characteristics, tenderness, and flavor attributes of bison. Specifically, this is …