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South Dakota State University

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2019

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Articles 151 - 177 of 177

Full-Text Articles in Life Sciences

Maximizing Ecosystem Services Provided To The New Oil Crop Brassica Carinata Through Landscape And Arthropod Diversity, Shane Stiles Jan 2019

Maximizing Ecosystem Services Provided To The New Oil Crop Brassica Carinata Through Landscape And Arthropod Diversity, Shane Stiles

Electronic Theses and Dissertations

Prairies, once spanning the Upper Midwest, have now largely been replaced by agriculture. The lack of resources available to pollinators in agricultural fields and the practices employed by farmers to maximize yield has led to a decline in insect and pollinator diversity. There is a need to better understand how ecosystem services provided by a diverse insect community scale to current farming practices as they relate to crop yield. We sought to explain how landscape heterogeneity relates to insect and pollinator diversity, as well as how insect diversity relates to crop yield across common farming practices. To evaluate how farming …

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Using Maximum Power As A Variable For 1rm Prediction In The Squat And Bench Press, Sean O'Connor Jan 2019

Using Maximum Power As A Variable For 1rm Prediction In The Squat And Bench Press, Sean O'Connor

Electronic Theses and Dissertations

Many Strength and Conditioning (S&C) coaches utilize a one-rep max (1RM) exercise test to gauge the maximal strength of athletes, and then prescribe resistance training programs based on a relative percentage of 1RM to obtain strength or power adaptations. However, many S&C coaches have raised questions regarding the safety and necessity of a 1RM test. Attempts to mitigate the weaknesses of 1RM testing have led to other methods of testing including repetition max testing (3RM, 5RM, 10RM, etc.) as well as load/velocity profiling. The main purpose of this study is to determine if 1RM can be accurately estimated from maximal …

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Parents In Urbanized Areas And Their Perception Of 4-H Youth Development Programs, Matthew Ryan Olson Jan 2019

Parents In Urbanized Areas And Their Perception Of 4-H Youth Development Programs, Matthew Ryan Olson

Electronic Theses and Dissertations

This study examined the perceptions held by parents living in the urbanized area of Rapid City, South Dakota, to determine if artificial barriers to joining 4-H PYD programs existed. Through snowball sampling methods, nine participants were recruited to engage in semi-structured interviews. Transcripts from the interviews were coded utilizing in vivo and axial coding methods. Four themes emerged from the interviews: characteristics of youth development programs, program promotion through school flyers, barriers to joining youth development programs, and 4-H and its connection to agriculture. The major recommendation for 4-H professionals is to focus on leadership, life skills, and character development …

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Undoing Gender: An Analysis Of How Women Communicate Within The Agricultural Industry, Shala R. Larson Jan 2019

Undoing Gender: An Analysis Of How Women Communicate Within The Agricultural Industry, Shala R. Larson

Electronic Theses and Dissertations

In recent history, women have entered more business-like positions in the agricultural industry. This thesis seeks to understand how women in agriculture describe their workplace communication and whether they feel they are part of a muted group. Twelve women were interviewed regarding their experiences as women in agriculture and were asked whether they feel valued in their positions and how they communicate with their male co-workers. Specifically, interviewees were asked if they ever felt the need to alter their communication to complement, emulate, or otherwise adjust to masculine communication styles. The majority of women interviewed reported having to strategically choose …

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Quality Evaluations Of Hard Red Spring Wheat Grown In South Dakota, Lance Merrick Jan 2019

Quality Evaluations Of Hard Red Spring Wheat Grown In South Dakota, Lance Merrick

Electronic Theses and Dissertations

Hard Red Spring Wheat (HRSW; Triticum aestivum L.) is characterized by generally high protein content and excellent baking and milling performance. The ability for millers, bakers, and other end-users of wheat to properly and cheaply produce food products with uniformity is dependent on the quality consistency of wheat produced by breeders and farmers. Determining how production years and locations influenced enduse quality traits will assist breeders, agronomists, and growers, in understanding which hard red spring wheat (HRSW; Triticum aestivum L.) varieties are least susceptible to quality fluctuations, and therefore, most desirable to end-users. In order to determine which varieties were …

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Receiving And Backgrounding Phase Management: The Effects Of Receiving Diet Roughage Source And Backgrounding Phase Rate Of Gain On Performance Of Feedlot Cattle, Ethan J. Blom Jan 2019

Receiving And Backgrounding Phase Management: The Effects Of Receiving Diet Roughage Source And Backgrounding Phase Rate Of Gain On Performance Of Feedlot Cattle, Ethan J. Blom

Electronic Theses and Dissertations

Management of cattle during the receiving and backgrounding phases can influence the performance of feedlot cattle. The receiving phase is a stressful time for cattle entering the feedlot and quickly adapting cattle to milled feed can impact their productivity. Silages are often viewed as less desirable feedstuffs in receiving diets for newly-weaned calves. The objective of this 2-yr study was to evaluate effects of roughage source in receiving diets on cattle performance, diet mixing, and diet integrity. Steer calves (yr 1, n = 180; yr 2, n = 210) were weaned and immediately transported 580 km. Calves were allotted to …

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Diversifying Cornfields By Interseeding Cover Crops: Practical Implications And The Response Of Invertebrate Communities, Michael Bredeson Jan 2019

Diversifying Cornfields By Interseeding Cover Crops: Practical Implications And The Response Of Invertebrate Communities, Michael Bredeson

Electronic Theses and Dissertations

The lack of suitable habitat conditions for beneficial organisms in simplified agroecosystems leads to unstable invertebrate communities and overreliance on chemical control of herbivores. It is possible to manage pest populations without agrichemicals by manipulating farmland so that herbivores are impaired by plant-driven bottom-up and enemy-driven top-down antagonisms. Interseeding cover crops between established crop rows is a method used by farmers to improve habitat suitability for natural enemies and hinder host-finding, feeding and movement by herbivores. Here I address three important research gaps related to interseeding cover crops. A calcium carbonate seed coating, used to improve seed-broadcasting efficiency, was tested …

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Anabolic Hormone Exposure During Various Stages Of Growth: Effects On Post-Weaning Performance, Frame Size, And Carcass Characteristics Of Calf-Fed Steers, Wesley W. Gentry Jan 2019

Anabolic Hormone Exposure During Various Stages Of Growth: Effects On Post-Weaning Performance, Frame Size, And Carcass Characteristics Of Calf-Fed Steers, Wesley W. Gentry

Electronic Theses and Dissertations

The growth promoting activity of implants have been documented. However, stage of growth in which the implant is administered may alter growth performance and carcass traits. An experiment was conducted to examine the effects of administering a conventional implant (Synovex C; SYN-C), or an extended-release combination implant (Synovex One Grass; ONE-G) to suckling steer calves on weaning weight, post-weaning growth performance, and carcass characteristics. Suckling steer calves were either not implanted (NONE) or were implanted with SYN-C or ONE-G. Steer calves were predominantly 30 to 60 d of age when implants were administered. Steers were weaned 176 d post-suckling implant …

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Effects Of Energy Development On Movements, Home Ranges, And Resource Selection Of White-Tailed Deer In The Western Dakotas, Bailey S. Gullikson Jan 2019

Effects Of Energy Development On Movements, Home Ranges, And Resource Selection Of White-Tailed Deer In The Western Dakotas, Bailey S. Gullikson

Electronic Theses and Dissertations

Oil and natural gas development has increased in recent years and research is needed to assess potential impacts on white-tailed deer (Odocoileus virginianus) populations. Our objectives were to document movements, home ranges, and resource selection of female white-tailed deer in response to energy development in the western Dakotas. Our study areas included Dunn County, North Dakota, an area with current oil and gas development, and Grant County, North Dakota, and Perkins County, South Dakota, areas without current oil and gas development. We captured and fitted 150 female deer with Very High Frequency (VHF) collars across study sites, and …

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Assessing Listeria Risk During Different Stages Of Ice Cream Manufacturing And Storage, Neha Singh Jan 2019

Assessing Listeria Risk During Different Stages Of Ice Cream Manufacturing And Storage, Neha Singh

Electronic Theses and Dissertations

Listeriosis is a life-threatening infection caused by foods contaminated with Listeria monocytogenes. Some of the major ice cream recalls in recent years reaffirm the ability of this food-borne pathogen to survive in diverse dairy processing environments and cause cross contamination. Inspection reports revealed certain lapses in implementing adequate hygienic practices for Listeria persistence in the processing environment, leading to cross contamination of ice cream. The higher levels of cross contamination of raw ice cream mix might result in random heat-injured cells when exposed to minimum heat treatment (69°C for 30 min). Evidence about the presence of injured cells in ice …

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Novel Hybrid Analogs Of Estrone Origin Exhibits Cytotoxic Effects Against Egfr-Dependent Cancers, Felix Acheampong Jan 2019

Novel Hybrid Analogs Of Estrone Origin Exhibits Cytotoxic Effects Against Egfr-Dependent Cancers, Felix Acheampong

Electronic Theses and Dissertations

Cancer is second only to cardiovascular illnesses as the deadliest human disease globally. Currently, non-small cell lung cancer (NSCLC) and triple negative breast carcinoma (TNBC) are the most frequent types of cancer and have the highest mortalities. Epidermal growth factor receptor (EGFR), a central regulator of tumor progression, is frequently overexpressed in both cancers and is a key clinical target for therapeutic intervention. Natural products and their synthetic analogs have been utilized as EGFR tyrosine kinase inhibitors (TKIs) with potent antitumor effects. However, acquired resistance limits the long-term efficacy of these drugs. Estrone has been used as a scaffold in …

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Impact Of Concussion And Orthopedic Injuries On Physical Activity And Quality Of Life After Sport Retirement, Makenna Hancock Jan 2019

Impact Of Concussion And Orthopedic Injuries On Physical Activity And Quality Of Life After Sport Retirement, Makenna Hancock

Electronic Theses and Dissertations

CONTEXT: Concussions and orthopedic injuries represent a significant risk related to participation in collegiate athletics. These injuries can create significant long-term impairments and functional limitations which may also decrease former athletes’ quality of life (QoL) and inhibit their ability to engage in physical activity. OBJECTIVE: To investigate QoL and physical activity levels of former collegiate athletes with a history of concussion and orthopedic injury, orthopedic injury only, and healthy controls. DESIGN: Descriptive, experimental study.
SETTING: Daily life as former National Collegiate Athletic Association Division I collegiate athlete.
PARTICIPANTS: Former Division I collegiate athletes competing in football, women’s soccer, baseball, softball, …

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Isolation And Identification Of Potential Bioinoculants Based On Phosphate Solubilizing And Plant Growth Promoting Benefits, Rachel Raths Jan 2019

Isolation And Identification Of Potential Bioinoculants Based On Phosphate Solubilizing And Plant Growth Promoting Benefits, Rachel Raths

Electronic Theses and Dissertations

Conservative models have shown that as populations rise, food production needs to double by 2050. Population increase and the green revolution have caused fertilizer inputs to increase since the 1960’s, increasing environmental issues and production costs. These intensive practices have led to degraded arable land and there has been an increase in urbanization meaning we need to make best use of the farming land that is available and ensure it is sustainable for future food production. Due to this, there has been a higher demand for research on more environmentally and economically friendly approaches to food production. Plant growth promoting …

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Bovine Cellular And Innate Immune Response To Hemostatic Polysaccharides, Brian Kobylkevich Jan 2019

Bovine Cellular And Innate Immune Response To Hemostatic Polysaccharides, Brian Kobylkevich

Electronic Theses and Dissertations

Chronic wounds are longstanding dermal wounds that do not heal in a normal amount of time and can commonly last for over a year. These wounds plague humans and farm animals alike. Wounds are characterized by chronic inflammation and are often painful, difficult to heal, have a high recurrence rate, and are potentially debilitating. Long term wounds that do not fully heal are distressing for both humans and animals, but understandably more resources have been directed towards humans. Some treatment options for humans may be suitable for adaptation into the field of animal care. Chronic lesions such as bovine digital …

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Effects Of Weight Loss On Gut Microbiota, Samitinjaya Dhakal Jan 2019

Effects Of Weight Loss On Gut Microbiota, Samitinjaya Dhakal

Electronic Theses and Dissertations

Incidence of obesity continues to rise for several decades now. Despite the availability of the multiple weight loss programs, losing or maintaining weight remains a universal challenge. A comprehensive lifestyle modification is usually the cornerstone for achieving weight loss. A wealth of new information on gut microbial responses to diet to impact human health has introduced a new frontier in nutrition science that may help better understand inter-individual response variations to weight-loss interventions. This observational study examined the microbiota changes after weight-loss in relation to age, sex, and body-composition features in adults. A 10% reduction in body weight resulted in …

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Hydrodynamic Cavitation As In-Line Process To Control Common Dairy Sporeformers, Pratibha Chaudhary Jan 2019

Hydrodynamic Cavitation As In-Line Process To Control Common Dairy Sporeformers, Pratibha Chaudhary

Electronic Theses and Dissertations

Sporeforming bacteria and their endospores have the ability to survive thermal treatments and proliferate in the milk and dairy products to cause spoilages. We applied the effect of hydrodynamic cavitation in controlling these bacteria and their spores at pilot scale level. Our aim was to investigate a technology that would improve the microbial quality of milk and dairy products, and is capable of being scaled up to be adapted at industrial level. Cavitation damages the cell walls of the bacteria and their endospores (releasing dipicolinic acid, responsible for endospore resistance to extreme conditions), thereby making them susceptible to thermal treatments …

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Mean Nutrition And Physical Activity Knowledge Score Of Children Ages 3-5 Years In The Igrow Readers Intervention, Mollie Loes Jan 2019

Mean Nutrition And Physical Activity Knowledge Score Of Children Ages 3-5 Years In The Igrow Readers Intervention, Mollie Loes

Electronic Theses and Dissertations

The prevalence of childhood obesity remains high within the United States, which can lead to long-term harmful effects. During the first five years of children’s lives, healthy eating habits and physical activity patterns are formed, so the preschool years are a critical time to begin obesity prevention (4). Because the preschool years are crucial for providing healthy eating habits and physical activity patterns, there is the need for childhood obesity interventions. iGrow Readers is a cluster-randomized control study concentrated on children 3-5 years of age recruited from childcare centers from South Dakota, Nebraska, and Minnesota. Fourteen child care centers with …

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Integration Of Molecular Techniques For The Investigation Of Bovine Respiratory Disease, Amy Abrams Jan 2019

Integration Of Molecular Techniques For The Investigation Of Bovine Respiratory Disease, Amy Abrams

Electronic Theses and Dissertations

Bovine respiratory disease (BRD) is the leading cause of morbidity and mortality in the cattle industry. The complexity of host, pathogen, and environmental factors contributing to the incidence of BRD necessitate a multifaceted approach to investigate BRD. A greater understanding of pathogenic and genetics factors associated with BRD would improve prevention and treatment of BRD. Due to the complexity of BRD, genetic technologies have been limited in their ability to identify a genetic basis for BRD. Pooling of DNA samples prior to extraction can increase the ability to conduct genotyping studies of complex traits. Once generated, new information and management …

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Using Isoconversional Methods To Study The Effect Of Antioxidants On The Oxidation Kinetics Of Milk Fat, Khalid Ahmed Alsaleem Jan 2019

Using Isoconversional Methods To Study The Effect Of Antioxidants On The Oxidation Kinetics Of Milk Fat, Khalid Ahmed Alsaleem

Electronic Theses and Dissertations

Milk fat is a versatile ingredient because of its nutritional value, functionality, and flavor. During processing and storage, milk fat may undergo oxidation resulting in many undesirable changes such as unpleasant flavor and aroma, and formation of toxic compounds. A common practice to prevent the oxidation of milk fat is by the addition of antioxidants. It is worth to mention that little is known on the effect of antioxidants on the oxidation kinetics. In this work, the effect of selected antioxidants on the oxidation kinetics of anhydrous milk fat (AMF) under non-isothermal conditions was investigated. AMF with an addition of …

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Species Of Fusarium Causing Root Rot Of Soybean In South Dakota: Characterization, Pathogenicity, And Interaction With Heterodera Glycines, Paul Nyawanda Okello Jan 2019

Species Of Fusarium Causing Root Rot Of Soybean In South Dakota: Characterization, Pathogenicity, And Interaction With Heterodera Glycines, Paul Nyawanda Okello

Electronic Theses and Dissertations

In South Dakota, Fusarium-associated diseases (e.g. seedling diseases, root rot and sudden death syndrome) are emerging threats to soybean production. Several species of Fusarium have been reported to cause these diseases in the soybean producing regions of the United States and in the world. However, little information is available on the species of Fusarium causing soybean root rot in South Dakota and their pathogenicity. Therefore, the objectives of this study were to (1) characterize the species of Fusarium causing soybean root rot in South Dakota; (2) evaluate the cross-pathogenicity of species of Fusarium causing root rot of soybean and corn; …

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Effects Of Oats And Distiller’S Dried Grains Fibers On Fortification Of Asian Noodles – Evaluation Of Glycemic Response, Noodle Quality And Nutritional Composition, Kara Konst Jan 2019

Effects Of Oats And Distiller’S Dried Grains Fibers On Fortification Of Asian Noodles – Evaluation Of Glycemic Response, Noodle Quality And Nutritional Composition, Kara Konst

Electronic Theses and Dissertations

The objective of this study was to develop Asian wheat noodle formulations enriched with oat flour and corn DDG at 10, 20 and 30 % wheat flour replacement levels and to evaluate the effects of this fiber and protein enrichment on the glycemic response of human subjects. We hypothesized that the addition of high-fiber oats and high-fiber, high-protein DDG will have synergistic effects in lowering the glycemic response in human subjects. In this study, steamed instant Asian noodles were prepared with DDG(D) and oats(OF) in combination with all-purpose wheat flour(W) in the following flour blends: (W:D) 90:10, (W:OF) 90:10, (W:D) …

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Menstrual Cycle And The Vascular Properties Of Remote Preconditioning, Shelby Rachel Jan 2019

Menstrual Cycle And The Vascular Properties Of Remote Preconditioning, Shelby Rachel

Electronic Theses and Dissertations

PURPOSE: A promising therapeutic intervention to counteract endothelial ischemia/reperfusion (I/R) injury is ischemic preconditioning (IPC). Limited data from ovariectomized animal models shows that estrogen deficiency abolishes the cardioprotective effects of IPC, whereas estrogen replacement restores protection. This suggests that alterations in female sex hormones, particularly estrogens, that occur naturally during the menstrual cycle is likely to influence the vascular protective properties of IPC. The aim of the present study was to identify how changes in female sex hormones that occur naturally during the menstrual cycle interfere with IPC to provide vascular endothelial protection in women. METHODS: Nine healthy premenopausal eumenorrheic …

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Diet, Prebiotics And Probiotics: Effects On Gut Microbiota In Obesity And Metabolic Disorders, Thamer Aljutaily Jan 2019

Diet, Prebiotics And Probiotics: Effects On Gut Microbiota In Obesity And Metabolic Disorders, Thamer Aljutaily

Electronic Theses and Dissertations

Targeting gut microbiota with diet, prebiotics, and probiotics are emerging as a promising intervention in the comprehensive nutritional approach to reducing obesity and metabolic disorders. Recent human and animal studies suggest that such intervention can promote health benefits by influencing the aspects of metabolism and immunity. However, study of the multi-role association between the diet, the host and the microbiota remains to be clarified. My dissertation attempts to clarify the problem of how gut microbiota (taxonomic composition and predicted functional capacities) affects obesity and metabolic disorders.
In chapter 2, I conducted a placebo-controlled intervention clinical trial to evaluate effects of …

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Prairie Dogs And Livestock In Rangeland Systems: Balancing Biodiversity And Production In The Northern Mixed-Grass Prairie, Jameson Robert Brennan Jan 2019

Prairie Dogs And Livestock In Rangeland Systems: Balancing Biodiversity And Production In The Northern Mixed-Grass Prairie, Jameson Robert Brennan

Electronic Theses and Dissertations

A major constraint of beef production within the Standing Rock Reservation has been identified as a reduction in rangeland quality due in large part to wide-scale colonization by black-tailed prairie dogs (Cynomys ludovicianus). The desire exists within the community to design a holistic framework which incorporates livestock management with the goal of increasing production and rangeland health while still maintaining increased diversity associated with prairie dogs. Prairie dogs reduce the carrying capacity of cattle on rangelands by up to 50% on occupied hectares through direct consumption of vegetation and waste due to clipping to improve detection of predators. Livestock stocking …

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Analysis Of The Molecular Mechanisms Governing Fcγ Receptor Activation On The Surfaces Of Macrophages By Advanced Optical Microscopy, Elizabeth Michelle Bailey Jan 2019

Analysis Of The Molecular Mechanisms Governing Fcγ Receptor Activation On The Surfaces Of Macrophages By Advanced Optical Microscopy, Elizabeth Michelle Bailey

Electronic Theses and Dissertations

Therapeutic antibodies are achieving new levels of therapeutic success in treating cancers and immunological disorders by antibody engagement of Fc receptor-directed immune responses. Conversely, inhibiting autoantibody induced Fc receptor activation is an attractive approach to treat autoimmune diseases. Immunoglobulin G (IgG) antibodies are often the principal subclass used in therapeutic antibodies and associated with autoimmune pathologies because of their long circulation and potent effector functions, including activation of the Fcγ Receptor (FcγR). Thus, a thorough understanding of the FcγR activation is required to improve the efficacy of immunotherapies and to mitigate autoimmunities. It is well established that FcγR clustering is …

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A Bioinfomatic Analysis Of Luminal And Mucosal Ileal Bacteria Colonizing Nursery Pigs Fed Different Protein Sources, Jamie L. Ortman Jan 2019

A Bioinfomatic Analysis Of Luminal And Mucosal Ileal Bacteria Colonizing Nursery Pigs Fed Different Protein Sources, Jamie L. Ortman

Electronic Theses and Dissertations

Weaning is a critical time in a young pig’s life that will greatly impact its adult growth and development. The objective of this research was to evaluate the effects of various protein sources on the bacterial composition within luminal and mucosal populations in simple and complex diets to gain a better understanding of factors influencing gut health. Weaned pigs were fed 1 of 3 simple experimental diets: 1) basic diet containing corn and soybean meal (Negative Control - NEG), 2) basic diet + fishmeal (FM; Positive Control - POS), and 3) basic diet + microbially-enhanced soybean meal (MSBM). Phase I …

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Identifying Critical Genes For Cholesterol Metabolism In Macrophages Using Crispr-Cas9 Whole-Genome Screens, Kevin Wanniarachchi Jan 2019

Identifying Critical Genes For Cholesterol Metabolism In Macrophages Using Crispr-Cas9 Whole-Genome Screens, Kevin Wanniarachchi

Electronic Theses and Dissertations

Macrophage foam cells contribute to atherosclerotic plaque formation, a pathology that underlies heart disease, peripheral arterial disease and stroke. Foam cells form when macrophages take up excessive amounts of low-density lipoprotein (LDL) leading to elevated cellular levels of neutral lipids, which are packaged into lipid droplet organelles. Despite the high public health priority motivating research of cardiovascular disease processes, current understanding of macrophage cholesterol metabolism including mechanisms of LDL uptake, cholesterol trafficking, lipid droplet biogenesis, lipid droplet degradation and cholesterol efflux is limited. Here, we implemented a CRISPR-Cas9 whole genome screening strategy to identify critical genes regulating macrophage cholesterol metabolism. …

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