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Development Of An Animal Model For Enterovirus For Evaluation D68 For Screening Of Antiviral Therapies, W. Joseph Evans
Development Of An Animal Model For Enterovirus For Evaluation D68 For Screening Of Antiviral Therapies, W. Joseph Evans
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Enterovirus D68 (EV-D68) virus has become more prevalent over the last 15 to 20 years. EV-D68 attacks the respiratory system and can cause severe disease in individuals who have underlying respiratory problems. There have also been reports of individuals with EV-D68 showing signs of neurological system problems and acute flaccid paralysis. Because of the increase in patients with EV-D68 and also the potential for neurological disease, an animal model is needed to study the disease and to evaluate experimental therapies for EV-D68 infection.
To develop the animal model, 4-week old AG129 mice that lack alpha and beta interferon receptors, making …
Evaluation Of Survey Methods And Development Of Species Distribution Models For Kit Foxes In The Great Basin Desert, Stephen J. Dempsey
Evaluation Of Survey Methods And Development Of Species Distribution Models For Kit Foxes In The Great Basin Desert, Stephen J. Dempsey
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Historically, kit foxes (Vulpes macrotis) once occupied the desert and semi-arid regions of southwestern North America, ranging from Idaho to central Mexico. Their range-wide decline has warranted the kit fox to be designated as a state sensitive species in Utah. Once considered the most abundant carnivore in western Utah, the kit fox has been in steep decline over the past decade, creating a demand to determine kit fox presence in the Great Basin desert. Currently there is little consensus on which survey methodology is best for detecting kit fox presence. We tested 4 survey methods (scat deposition, scent …
Nutritional And Economic Analysis Of Small-Scale Agriculture In Imbabura, Ecuador, Jake Erickson
Nutritional And Economic Analysis Of Small-Scale Agriculture In Imbabura, Ecuador, Jake Erickson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Intervention projects in the developing world normally aim to satisfy either the nutritional needs of a group, or advancing the economic stability, but not both. One of the many issues that may arise by narrowly focusing and creating an aid program is that although a group may be fed, they are not equipped to mitigate risks that will arise after project completion and thus continue or revert back to a malnourished state. A bridge is required to join the economic and nutritional programs to create aid interventions that are sustainable past the point of donor separation.
This paper proposes the …
A Case Study Of Professors' And Instructional Designers' Experiences In The Development Of Online Courses, Karl B. Stevens
A Case Study Of Professors' And Instructional Designers' Experiences In The Development Of Online Courses, Karl B. Stevens
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objective of this study was to examine the experiences of instructional designers and professors during their efforts to develop online courses and to determine what effect their experiences had on the development process. Five professors and five instructional designers at Utah State University participated in this qualitative, single-case study. Participants were purposefully selected as matched pairs of development teams based on their respective levels of expertise in course development.
The ADDIE instructional design model was used as a conceptual framework to which emergent themes were aligned. ADDIE is an acronym for analysis, design, development, implementation, and evaluation. The key …
Phenotypic Plasticity And The Post-Modern Synthesis: Integrating Evo-Devo And Quantitative Genetics In Theoretical And Empirical Studies, Alison G. Scoville
Phenotypic Plasticity And The Post-Modern Synthesis: Integrating Evo-Devo And Quantitative Genetics In Theoretical And Empirical Studies, Alison G. Scoville
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Mainstream evolutionary biology lacks a mature theory of phenotype. Following from the Modern Synthesis, researchers tend to assume an unrealistically simple mapping of genotype to phenotype, or else trust that the complexities of developmental architecture can be adequately captured by measuring trait variances and covariances. In contrast, the growing field of evolutionary developmental biology (evo-devo) explicitly examines the relationship between developmental architecture and evolutionary change, but lacks a rigorous quantitative and predictive framework. In my dissertation, I strive to integrate quantitative genetics and evo-devo, using both theoretical and empirical studies of plasticity. My first paper explores the effect of realistic …
Development, Evaluation, And Efficacy Of A Heart Healthy Curriculum In Two Different Education Settings; Emphasizing Food Portioning And Cooking Skills, Increased Fruits, Vegetables, Whole Grains, Low-Fat Dairy, And Exercise, Rachel Richins
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Cardiovascular disease (CVD) is a leading cause of mortality and morbidity in the United States. The prevalence of CVD will increase in conjunction with the rise in obesity and type 2 diabetes and decrease in physical activity, due to the adverse effects of adiposity and atherosclerosis associated with these syndromes. Excellent inpatient, outpatient, and community-based program s are available to educate and direct healthy behavioral changes, yet the number of programs available is not sufficient for the volume of patients, nor widely distributed in all areas (particularly rural areas). There is a lack of comprehensive education programs for adults directed …
Development And Evaluation Of An Electronic Food Frequency Questionnaire For Estimating Calcium Intake Among Multiethnic Youth, Siew Sun Wong
Development And Evaluation Of An Electronic Food Frequency Questionnaire For Estimating Calcium Intake Among Multiethnic Youth, Siew Sun Wong
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Youth consuming inadequate amounts of calcium are at risk of developing osteoporosis later in life. To better assess dietary calcium intakes and the efficacy of dietary intervention strategies to improve bone health among youth, it is important to develop calcium intake assessment tools that are reliable, accurate, and interactively engaging for a new generation of youth who have a higher computer literacy and are more technologically knowledgeable than preceding generations. The goal of this dissertation was to develop and evaluate an electronic food frequency questionnaire (eFFQ) that measures calcium intake among 11-to 18-year-old Asian, Hispanic, and White youth. Enhancing this …
Development And Characterization Of Eukaryotic Biomimetic Liposomes, Bradley Jay Taylor
Development And Characterization Of Eukaryotic Biomimetic Liposomes, Bradley Jay Taylor
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study developed and characterized phospholipid vesicles, or liposomes, that mimic cell surfaces. Microemulsified liposomes contained biotinylated phosphatidylethanolamine, allowing them to be immobilized to avidin-coated glass. Laminin (LN), glycosphingolipids (GMl and GM3), and Escherichia coli's mechanosensitive channel of large conductance (EcoMscL) were embedded into liposome membranes. It was determined whether these embedded molecules exhibited their physiological roles of adhesion, cell recognition, and mechanosensation, respectively. Confocal laser scanning microscopy (CLSM) was employed to examine the interaction of fluorescently probed proteins, toxins, and bacteria with the immobilized microemulsified liposomes. Capture of individual and simultaneous multiple species of bacteria by GMl, GM3, …
Development Of A Bird-Avoidance Model For Naval Air Facility El Centro, California, Edward J. Zakrajsek
Development Of A Bird-Avoidance Model For Naval Air Facility El Centro, California, Edward J. Zakrajsek
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Bird strikes (collisions between birds and aircraft) pose a significant threat to aviation safety. For example, Naval Air Facility El Centro, California, lost an F-18 jet to a bird strike in October 1995. To help combat the bird-strike threat at Naval Air Facility El Centro, I developed a bird-avoidance model as a risk-management tool for the installation. It can be used to schedule flights at NAF El Centro and its two associated practice-bombing ranges during times of low-bird activity. I calculated bird-strike risks and published them in web-page format on both the installation's server and the USGS/Utah State University, College …
The Development Of Pediococcus Species As Starters For Mozzarella Cheese, Shelby L. Caldwell
The Development Of Pediococcus Species As Starters For Mozzarella Cheese, Shelby L. Caldwell
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Bacteriophage infection of Streptococcus thermophilus is a growing concern in the mozzarella cheese industry. One method to control this problem may be to replace S. thermophilus with a starter coccus from a different genus of lactic acid bacteria. This work evaluated the possibility of using genetically modified Pediococcus spp. for this approach. Electroporation was used to introduce genes for lactose utilization from Lactococcus lactis into strains of P. acidilactici and P. pentosaceus. The resulting lactose-positive transformants, P. acidilactici SAL and P. pentosaceus SPL-2, rapidly reduced the pH of lactose broth, accumulated [14C]lactose at a rate higher than …
Development And Validation Of Forest Habitat Models In The Uinta Mountains, Utah, Tracey S. Frescino
Development And Validation Of Forest Habitat Models In The Uinta Mountains, Utah, Tracey S. Frescino
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A significant question currently facing environmental managers is how to accurately and efficiently quantify forest diversity and resources. Numerous studies have demonstrated the use of modern spatial analytical tools, such as geographical information systems (GIS), remote sensing devices, and statistical models for predicting the distribution of dominant vegetation cover types. This study examines the ability of generalized additive models (GAMs) to delineate structural diversity in forested ecosystems (specifically the Uinta Mountain Range in Utah) using GIS tools and satellite spectral data, and analyzes the effect of including different forms of satellite data in model construction (i.e., Landsat thematic mapper (TM), …
Ammonium And Nitrate Effects On Growth, Development And Nutrient Uptake Of Hydroponic Wheat, Thomas M. Hooten
Ammonium And Nitrate Effects On Growth, Development And Nutrient Uptake Of Hydroponic Wheat, Thomas M. Hooten
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The long-term effects of low and high NH4+/ NO3- uptake ratios in a system with rigorous control of pH and nitrogen concentration are poorly understood. In two replicate studies, two cultivars of wheat (Triticum aestivum) were grown to maturity with three NH4+/ NO3- ratios in hydroponic solution: 0/100, 25/75, and 85/15%. Nitrogen was controlled at ample levels throughout the 70-d life cycle and pH was controlled at 5.8 ± 0.2. An equimolar ratio of NH4+ to Cl- was used to facilitate charge balance. Nitrogen consumption …
Development Of An Ovine Genome Map With Emphasis On In Situ Hybridization, Melanie R. Heaton
Development Of An Ovine Genome Map With Emphasis On In Situ Hybridization, Melanie R. Heaton
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Livestock genome maps are used to identify economic trait loci and loci proximal to genes affecting economically important traits. This research contributes to the development of the ovine genome map by establishing techniques to physically map large DNA inserts to ovine chromosomes using fluorescent in situ hybridization. Fluorescent in situ hybridization techniques were established using yeast artificial chromosomes as DNA probes. Probes were as large as 1,000,000 kilobases and hybridized to fixed ovine metaphase chromosomes from a callipyge ewe. Three yeast artificial chromosome probes contained a genetic marker for the ovine callipyge gene. Probes were assigned to ovine chromosome pair …
Effects Of Antioxidants On Development Of In Vitro Fertilized Bovine Embryos, Bret L. Anderson
Effects Of Antioxidants On Development Of In Vitro Fertilized Bovine Embryos, Bret L. Anderson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Free radicals are short-lived molecules that can cause decreased embryonic development in vitro. Antioxidants are molecules that block free radical formation or guard against their harmful effects. Many studies have linked exposure of media to light and culturing of embryos in high (20%) oxygen concentrations to free radical production. Some of the antioxidants used in culture media are superoxide dismutase (SOD), catalase, zinc (II), ethylenedinitrilo tetraacetic acid (EDTA), mannitol, vitamin E, dimethyl sulfide, and taurine. Most research involving antioxidants and embryonic development has been conducted on non-farm animals, particularly mouse and rabbit. Studies have shown that antioxidants in vitro culture …
Development Of Fluorescent In Situ Hybridization Techniques For Physical Mapping In Ovis Aries, Eleanor P. Jenson
Development Of Fluorescent In Situ Hybridization Techniques For Physical Mapping In Ovis Aries, Eleanor P. Jenson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Genome maps provide information used to identify economic trait loci and loci proximal to genes affecting economically important traits. This research contributes to the development of the ovine genome map by establishing ovine tissue culture techniques and fluorescent in situ hybridization techniques in this laboratory. In addition, a karyotype for sheep affected with spider lamb syndrome was developed. Ovine tissue culture techniques were established using fibroblasts grown from primary explants of sheep and modified cytogenetic procedures. Metaphase chromosomes were obtained from the fibroblast cultures and used for fluorescent in situ hybridization and for banding procedures to develop the spider lamb …
Development And Evaluation Of An Expert System For Use As An Aid In Culling Dairy Cattle, Max L. Checketts
Development And Evaluation Of An Expert System For Use As An Aid In Culling Dairy Cattle, Max L. Checketts
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
An expert system for identifying cows to be culled, MAXCULL, was programmed to run on an IBM or compatible personal computer. It was designed to be used with Dairy Herd Improvement (DHI) records as an aid in decision making. MAXCULL used fifty-two health, seventeen reproduction, and thirty-nine production rules in the analysis.
MAXCULL was initially developed using two expert system tools. VP-Expert and Super Expert both had inductive abilities and were reasonably priced. VP-Expert was selected to continue the development of the MAXCULL system. The program used a rule-based method of storing knowledge, which was obtained from literature reviewed in …
The Development Of Methodology For Gas Liquid Chromatographic Determination Of Plant Sugars In Maturing Reed Canarygrass, Allan Scott Bittner
The Development Of Methodology For Gas Liquid Chromatographic Determination Of Plant Sugars In Maturing Reed Canarygrass, Allan Scott Bittner
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study was concerned with development of chromatographic methods suitable for determination of plant sugars. The resultant methodology was applied to the comprehensive study of plant carbohydrates as they vary during plant growth. Plant cell walls were isolated with boiling water followed by delignification with acid chlorite. The soluble portions were hydrolyzed with 2N sulfuric acid and the total sugars and individual monosaccharides were quantified using gas chromatography and colorimetry. The insoluble residues were hydrolyzed with 72% sulfuric acid followed by dilution with water to 2N and further hydrolysis. The effects of duration of delignification and acid hydrolysis were interpreted …
A Study Of Rest Period, Hardiness, And Bud Development Of The 'Concord' Grape, Mervin Gayle Weeks
A Study Of Rest Period, Hardiness, And Bud Development Of The 'Concord' Grape, Mervin Gayle Weeks
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The length of the 'Concord' grape rest period was evaluated during 1974-75 and 1975-76. Cuttings were placed in a 25 C growth chamber every two weeks from October through April. Number of days to reach 50 percent full bud swell was plotted to determine rest completion. Seven years of weather data and full bloom dates of 'Concord' grapes from Prosser, Washington were statistically analyzed to give another estimate of rest completion. Rest was terminated after about 830 chill units.
During 1974-75 and 1975-76, T50 temperatures were determined every two weeks for both cambium and primary buds of 'Concord' grapes. …
The Development Of An Index Of Food Quality, Ann Woolley Sorenson
The Development Of An Index Of Food Quality, Ann Woolley Sorenson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this study was to develop a food quality index that can provide practical information to both consumers and professional people. The Index of Food Quality (IFQ) is a simple computerized tool based on a concept of nutrient density. The IFQ was designed to organize and clarify the present body of food composition data into a form that is directly applicable to dietary problems.
The IFQ provides a method of analyzing food quality based on energy needs. The nutrient contents of foods are compared to essential nutrient standards with calories as a common denominator. In developing the IFQ, …
The Effect Of High Air Temperature And Depth Of Planting On The Emergence And Development Of Selected Grain Sorghum (Sorghum Vulgare) Cultivars, Jhander Orihuela
The Effect Of High Air Temperature And Depth Of Planting On The Emergence And Development Of Selected Grain Sorghum (Sorghum Vulgare) Cultivars, Jhander Orihuela
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The behavior of seedlings of six sorghum cultivars planted at 2.5, 5.0, 7.5, and 10.0 centimeters was studied in growth chambers at air temperatures of 28, 32, 36, and 40 centigrades (daytime).
A day length of 12 hours and a nighttime air temperature 8 centigrades lower than daytime were used throughout.
The cultivars, three hybrids and three varieties, were grown in sand culture. Field moisture capacity was maintained during the period of observation.
After 14 days of growth, data were collected on the emergence percentages, above ground growth, above ground oven dry weights, below ground growth, and below ground oven …
Effect Of Stage Of Seedling Development On Absorption Of Selected Pre-Emergent Herbicides, Pairoj Suchinda
Effect Of Stage Of Seedling Development On Absorption Of Selected Pre-Emergent Herbicides, Pairoj Suchinda
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Using radioautography 14C simazine, 14C EPTC, 14C 2,4-D, 1414 DCPA and 14C pyrazon absorption by seeds of bean (Phaseolus vulgaris L.), squash (Cucurbita maxima), corn (Zea mays), onion (Allium cepa) and oat (Avena sativa) was studied. Simazine, EPTC, 2,4-D and pyrazon were absorbed through the seed coat of bean, squash, corn and onion, the amount increasing with time. Little DCPA was absorbed by seeds of bean, squash, onion and oat. Distribution and translocation of 14C simazine, 14C EPTC and 14C pyrazon occurred in …
A History Of Timber Resource Use In The Development Of Cache Valley, Utah, Douglas M. Bird
A History Of Timber Resource Use In The Development Of Cache Valley, Utah, Douglas M. Bird
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
It has long been realized that the forests and forest products contributed very significantly toward the economic development of the Western United States. However, the extent of this contribution over a relatively small area has never been fully analyzed. Therein lies the primary justification for this paper. The author hopes that the readers of this paper will, through their reading, gain some appreciation of the major role the forest and its products played in the development of the western community.
Because of some important social differences between the area described in this paper and other western communities, the history herein …
The Effect Of Limited Moisture Supply At Various Stages Of Growth On The Development And Production Of Hybrid Corn, Ralph E. Campbell
The Effect Of Limited Moisture Supply At Various Stages Of Growth On The Development And Production Of Hybrid Corn, Ralph E. Campbell
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Corn occupies from 25 to 30 percent of the crop land harvested in the United States. In recent years the acreage devoted to corn in this country has been decidedly greater than that devoted to any other cultivated crop. In 1944 its dollar value exceeded the combined values of wheat, barley, rye, grain sorghums, and cotton.
Although South Dakota lies on the northwestern fringe of the corn belt, the corn crop is one of the most important in that state. Corn production in that area is somewhat unstable because of drought. Corn often fails to reach full maturity before the …