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Synthesis And Biological Activity Of Aminoglycosides And 1,4-Naphthoquinone Derivatives, Marina Fosso Yatchang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The research described in this dissertation is at the interface of organic chemistry and biology, and it aimed at designing and synthesizing biologically active molecules for the possible development of therapeutic agents.

Spinal muscular atrophy is an incurable disease that affects 1 in every 6000 babies, making it the leading genetic cause of infant mortality. While no treatment is available, efforts are being taken to solve this issue. Part of the work outlined in this dissertation was carried out in collaboration with researchers from the University of Missouri to investigate a potential therapeutic for this disease.

In addition, the continuous …

The Effects Of Bison On Cattle Winter Range In The Henry Mountains Of South Central Utah: Resolving A Conflict, Ian M. Ware

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The American Bison in the Henry Mountains are one of the last free-roaming, genetically pure herds of bison remaining in North America. Over the last decade, the herd has used a cattle winter range during the summer and early fall, creating a conflict between the wildlife officials who manage the bison population, and Bureau of Land Management officials and local ranchers who manage the rangeland. At the heart of this conflict is the question of whether bison are negatively impacting the rangeland resource, potentially reducing the abundance of preferable plant species. Negative impacts could include reduced forage availability in the …

Using Biophysical Geospatial And Remotely Sensed Data To Classify Ecological Sites And States, Carson A. Stam

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Within the Intermountain West, vast expanses of big sagebrush shrubland and steppe are considered emblems of the western range. Currently, there are approximately 60 million hectares of big sagebrush within the 11 western states, four million of which are in the state of Utah. However, the historic distribution of sagebrush has been impacted by conversion to other types of land cover through juniper encroachment, urbanization, invasive weeds, and agricultural expansion. In Utah alone, big sagebrush communities have been reduced to approximately 55% of their historic extent. A primary and current example of the cumulative impact of big sagebrush loss is …

Closed-Loop Thrust And Pressure Profile Throttling Of A Nitrous Oxide/Hydroxyl-Terminated Polybutadiene Hybrid Rocket Motor, Zachary W. Peterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Hybrid motors that employ non-toxic, non-explosive components with a liquid oxidizer and a solid hydrocarbon fuel grain have inherently safe operating characteristics. The inherent safety of hybrid rocket motors offers the potential to greatly reduce overall operating costs. Another key advantage of hybrid rocket motors is the potential for in-flight shutdown, restart, and throttle by controlling the pressure drop between the oxidizer tank and the injector. This research designed, developed, and ground tested a closed-loop throttle controller for a hybrid rocket motor using nitrous oxide and hydroxyl-terminated polybutadiene as propellants. The research simultaneously developed closed-loop throttle algorithms and lab scale …

Population Dynamics And Movements Of Translocated And Resident Greater Sage-Grouse On Anthro Mountain, Utah, Natasha W. Gruber

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Greater sage-grouse (Centrocercus urophasianus) populations have declined range-wide. Species translocations have been identified as a conservation strategy to augment declining populations in restored habitats. I evaluated protocols previously used to successfully translocate greater sage-grouse in Utah by comparing annual production, survival, habitat use, integration and seasonal movements of translocated birds and their chicks to the resident population. To conduct this study, I translocated 60 greater sagegrouse hens captured and radio-collared on Parker Mountain to Anthro Mountain in the spring of 2009 and 2010. I also captured and radio-collared 19 resident hens to serve as my control group. All …

Factors Influencing Relocation Success Of Utah Prairie Dog (Cynomys Parvidens), Rachel Curtis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah prairie dogs have been extirpated in 90% of their historic range due to introduced disease, eradication, and habitat destruction. Most of the population lives on private land where animals burrow in lawns and agricultural fields, which keeps this threatened species continually in conflict with landowners. The Utah Division of Wildlife Resources has been relocating prairie dogs from private to public land since the 1970s, but relocations have been largely unsuccessful due to high mortality. Prairie dogs are highly social animals, but they are usually relocated without regard to their family group, or coterie. Coteries typically consist of one reproductive …

A Study Of Utah’S New Century Scholarship (Ncs) Program, Christine Kearl

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This was a study about the New Century Scholarship (NCS) program offered to Utah high school students at commencement for earning an AA degree by the time of high school graduation. The scholarship paid 75% of the remaining 2 years of tuition over a 5-year period. The goal of the program was to assist students to bachelor degree completion faster than the traditional time.

This program has been in Utah for the past 20 years, but little to no information about the program exists. Annually, the cost to taxpayers is approximately $2 million dollars. This study was conducted to determine …

Utah Angler Specialization And Its Relationship To Environmental Attitudes And Angler Motivations, Joseph W. Unger Iii

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

For this research, I sampled 10,000 anglers who purchased a Utah fishing or fishing/hunting combination license from January through November, 2011. An online survey link was provided to the potential participants during November-December, 2011, to determine levels of specialization, motivations for fishing, and environmental awareness/concern. Anglers were also compared to a sample from the general public to compare the two groups’ feelings toward several practices taking place on public lands. Finally, anglers were divided into consumptive and nonconsumptive subgroups to compare the environmental attitudes of these two groups.

Three angler specialization groups were identified from the sample of respondents. Anglers …

Relationships Between Classroom Schedule Types And Performance On The Algebra I Criterion-Referenced Test, Gregory V. Murray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Public education has options with regard to educational settings and structures. States and school districts may select varying lengths for the school year, lengths for the school day, and lengths for individual class periods. In Utah, one measure of students' achievement is scores on the State's end-of-level criterion-referenced test (CRT) for Algebra I. Additionally, an option regarding educational structures is the schedule type used to deliver Algebra I classes. This study examined the relationship between student achievement as measured by Algebra I CRT scores, and the schedule type used to deliver Algebra I classes. The schedule types compared were the …

Examination Of Nonpoint Source Nutrient Export From A Snowfall-Dominated Watershed, Lindsey Deboer Carrigan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined nonpoint source pollution via tributaries to Pineview Reservoir. Since few literature values of export coefficients are available for snowfall-dominated watersheds such as Pineview, locally scaled rates were quantified using an upstream-downstream bracketing technique. Nitrogen and phosphorus grab samples were manually collected and discharge measurements were conducted during the annual study period. Additionally, high-frequency monitoring sensors that measured EC, temperature, turbidity, and water level were deployed at the up- and downstream sites to represent short-duration transport events and to examine watershed processes on a more representative time scale.

Daily nutrient loads were estimated from grab samples and flow …

The Application Of Tomographic Reconstruction Techniques To Ill-Conditioned Inverse Problems In Atmospheric Science And Biomedical Imaging, Vern Philip Hart Ii

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tomography is an imaging technique in which 3D models of objects are created from several 2D projections viewed at different angles. When the number of available projections is limited, the resulting data are said to be sparse. This restriction is often a direct result of the imaging geometry used to acquire the data. One-sided views and a small number of receivers can reduce the range of available projections, which makes the object more difficult to reconstruct. Approximate solutions to difficult imaging problems can be obtained using a class of iterative algorithms known as the algebraic reconstruction techniques (ARTs). The presented …

Mechanisms And Signal Transduction Pathways Involved In Bovine Oocyte Activation, Ammon Hanson Bayles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Being able to create a genetically identical, living replicate of a prized animal sounds impossible. Through advanced scientific methods and the wonders of mother nature it can be accomplished by a process called cloning. In 2003, the USU Animal, Dairy, and Veterinary Science department and Dr. Kenneth L. White gained world wide recognition when they, along with a team for Idaho, cloned the first equine species.

Cloning certain animals could be very advantageous to the agricultural industry. Prized animals that have died could be cloned, producing the best meat and milk supply. Animals that are sterile or endangered could be …

Effect Of Silicon On Plant Growth And Drought Stress Tolerance, Kaerlek W. Janislampi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Silicone is a silicon-containing synthetic polymer. Silicon is a metalloid chemical element. Silicon is not considered an essential nutrient for plants, but it is typically abundant in soils and can be taken up in large amounts by plant roots. Silicon is known to have beneficial effects when added to the soil in which rice and several other plants are cultivated. These beneficial effects include disease and insect resistance, plant structural fortification, and regulation of the uptake of other plant nutrients. Silicic acid is the form of silicon in soils that is available to plants. In this study, the effect of …

Modulation Of The Host Response To Tacaribe Arenavirus Infection In Ag129 Mice By My-24, Eric Sefing

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

MY-24 is a new antiviral compound recently shown to protect immunocompromised mice from lethal challenge with Tacaribe virus (TCRV). Tacaribe virus is incapable of causing disease to humans, but is closely related to the highly pathogenic New World arenaviruses that cause often-fatal viral hemorrhagic fever syndromes. Remarkably, MY-24 prevents mortality without reducing virus burden in the circulation or tissues. To investigate the mechanism by which MY-24 protects AG129 mice against Tacaribe virus infection, we first characterized the natural history of disease in the model with an emphasis on host immune response and blood vessel function to establish the best times …

Design And Construction Of A Tunable Light Source With Light Emitting Diodes For Photosynthetic Organisms, Nathan Phillipps

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis describes and documents the design and construction of a light source which is tunable and has the ability to mimic the spectral output of the sun in the photosynthetic active radiation range (400 - 700 nm). To adjust the spectral output at different wavelengths different types of LEDs were chosen and combined. This thesis describes the design, construction, testing, and suggestions for further improvements to this light source. The light source is comprised of 900 LEDs with 26 different peak wavelengths within the photosynthetically active radiation range. The light source is made tunable through the use of a …

Marital Quality, Acculturation, And Communication In Mexican American Couples, Audrey Lyn Schwartz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Marital quality is a broad measurement of perceptions of satisfaction, happiness, and stability by partners in an established relationship. Marital quality has been relatively understudied among Mexican Americans, a population that warrants the inclusion of cultural constructs in any model concerning relationship outcomes. Therefore, acculturation differences between Mexican American couples were conceptualized as a distal context for understanding marital quality. Traditional gender role values and communication style (warmth and hostility) were included as proximal contexts. Data from Conger’s California Families Project were utilized; results indicated that while most measures of acculturation did not impact marital quality, language use interacted with …

An Exploration Of The Relationships Among Connectedness To Nature, Quality Of Life, And Mental Health, Peter G. Tauber

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In recent decades, a new branch of psychology has emerged—ecopsychology. This field looks at the complex relationship between human beings and the natural world. Previous research has shown the importance of direct experiences in nature for the promotion of human health and well-being. However, it is still not understood why these experiences in nature carry so much importance.

It is possible that the concept of connectedness to nature (CTN) plays a role in this relationship between nature and wellness. CTN is defined as feelings of close affiliation with the natural world in a physical, cognitive, and emotional manner. Previous research …

Waste Heat Utilization In An Anaerobic Digestion System, Brett Boissevain

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Anaerobic digestion has great potential as an energy source. Not only does it provide an effective method for waste mitigation, but it has the potential to generate significant quantities of fuel and electricity. In order to ensure efficient digestion and biomass utilization, however, the system must be continuously maintained at elevated temperatures. It is technically feasible to supplement such a system with outside energy, but it is more cost effective to heat the system using only the produced biogas. While there is considerable literature covering the theory of anaerobic digestion, there are very few practical studies to show how heat …

The Effects Of Habitat Manipulations On Utah Prairie Dogs (Cynomys Parvidens) And Their Habitat On The Awapa Plateau Recovery Area In South-Central Utah, Gretchen Elizabeth Caudill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah prairie dogs have been listed, in some capacity, under the Endangered Species Act since 1972. The lack of suitable habitat, particularly cool season grass cover,
has been identified as the primary factor impeding species recovery. Due to reproduction costs, Utah prairie dogs require a large quantity of cool season grasses. Lack of recovery has also been attributed to poor juvenile survival. Increased resources have been shown to increase weights, which would increase survival through the winter.

Beneficial habitat management techniques for Utah prairie dogs have yet to be determined for the Awapa Plateau recovery area. Utah prairie dogs require …

Farmer, Miner, Ranger, Writer: Interpreting Class And Work In The Writing Of Wendell Berry And Edward Abbey, Tyler Austin Nickl

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study compares some of the essays and novels of two well known, environmental writers: Wendell Berry and Edward Abbey. Usually, these writers are discussed for their environmental politics and representations of nature, but this study examines the ways in which each of these writers discusses class and manual labor. This aspect of Abbey’s and Berry’s works has not yet received the attention it deserves. With this focus in mind, I make the following conclusions: 1) An author’s view of society (as expressed by their opinions of class and socioeconomic status) necessarily affects their view of nature. 2) Berry’s occupational …

Root Uptake Of Organic Contaminants Into Plants: Species Differences, Naho Orita

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Xenobiotic organic contaminants are widely found in the environment, including soils, sediments, surface waters, wastewater streams, and even in drinking water. Food chain contamination resulting from the uptake of these contaminants by plants is a concern. Although the uptake of a variety of xenobiotic organic contaminants by plants has been reported but the differences between plant species are not fully understood. The emphasis of this thesis research is to further investigate the unique root to shoot transfer ability of “gold rush” zucchini that has been reported repeatedly in recent years.

A pressure chamber technique was used to measure transpiration stream …

"Worlds Without End": The Cosmological Theodicy Of Brigham Young, James Chase Kirkham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis proposes an analysis of the teachings of Brigham Young, second President of the Church of Jesus Christ of Latter-day Saints. The study focuses on Young’s more striking doctrine—namely, the eternal nature of matter, the capability of humans to live after death where they would eternally gain knowledge, a universe governed by a race of exalted human beings called gods, and the potential for humans, upon reaching the status of gods and goddesses, to create planets and populate them with their children.

This study uses a three-fold method to understand why some of Young’s teachings were so remarkable. First, …

Continental-Scale Characterization Of Molecular Variation In Quaking Aspen, Colin M. Callahan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Quaking aspen has the largest natural distribution of any tree native to North America, ranging from Alaska through the breadth of Canada and south to mid-Mexico. Recent studies suggest a general decline of aspen throughout much of the range since at least the mid-20th century, though these findings remain inconclusive. Regardless, factors such as climate change, periods of drought, soil nutrient deficiencies, pathogens, insects, and encroachment by other tree species all pose risks to the health and maintenance of aspen across the continent. This situation is exemplified in the western United States where climate change is forecasted to have an …

Experimental Studies Of Vertical Mixing In An Open Channel Raceway For Algae Biofuel Production, Ram Sudheer Voleti

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The USU BioEnergy Center has been successful in developing algae feedstocks for renewable biofuels and bioproducts. The concept is to utilize and maximize algae feedstocks for liquid transportation fuels, biomass for burning and digestion, and high value co-products. It is theorized that increasing the mixing in open and closed algal production systems improves the productivity of the algae culture. A raceway cultivation system was chosen to examine the phenomena of mixing. Vertical mixing will provide more uniform exposure to sunlight for all of the algae in the raceway. The main focus of this research was to increase vertical mixing. Delta …

Value Of Information In Design Of Groundwater Quality Monitoring Network Under Uncertainty, Abdelhaleem I. Khader

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Due to variations in rainfall and limited surface water resources, groundwater is considered the main source for freshwater in many places throughout the word. But this precious resource is being jeopardized by pollution from human activities such as: industry, agriculture, and untreated wastewater, which highlight the need for efficient groundwater resources management. To be efficient, groundwater resources management requires efficient access to reliable information that can be acquired through monitoring. On the other hand, the complicated nature of groundwater aquifers and the uncertainties in the data and the models used to understand the aquifer and its behavior require more powerful …

Late Adolescents’ Perceptions Of A Digital Generation Gap And Perceived Parent-Child Relations, J. Mitch Vaterlaus

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to determine if late adolescents (18-25 year olds) perceived differences between their own knowledge about interactive technology and what they thought their parents knew about the same technology. Secondly, the study sought to understand how differences in these perceived technology were related to adolescent perceptions about their interactions with their parents. The parent-child relationship characteristics of interest in this study were parent-child quality time, parent-child conflict, and parents’ knowledge of their childrens’ behaviors.

Late adolescents did perceive generational differences in technology knowledge in the areas of video chat, cell phones, general social networking, …

Genetic Characterization Of Fine-Leaved Festuca Valesiaca Germplasm And Evaluation Of Their Relationship To The Festuca Ovina Complex, Yingmei Ma

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Fine-leaved Festuca valesiaca has stress tolerance. However, its agronomic performance in the western United States and its genetic relationship to species of the Festuca ovina complex has not been investigated. Also, natural hybridization makes them difficult to identify. Given the species' potentials, our project was designed to identify Festuca valesiaca accessions that possess high biomass and seed yield and to examine their relatedness with the Festuca ovina complex.

The Festuca valesiaca accessions examined produced many small seeds. Seed production was correlated with the total biomass, plant height, and plant vigor. The Festuca valesiaca accessions examined were shorter than the control …

The Use Of Life History Collage To Explore Learning Related To The Enactment Of Social Consciousness In Female Nonprofit Leaders, Susan R. Seymour

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This paper advances a novel qualitative research approach using life history collage. Rather that utilizing an interview protocol to enter into a participant’s story, life history collage invites participants to create a longitudinal collage of significant life events around a theme such as learning, relationships, or identity. The longitudinal nature of the collage situates and prioritizes significant life events with images, words, and elements chosen to represent events and circumstances. Each image within the collage contains rich and nuanced storylines that invite exploration by both researcher and participant. Meanings and subtexts are revealed as participants describe their collage and the …

A Mechanistic Study Of Catalytic Promiscuity In Protein Phosphatase 1, Yuan Chu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

"Catalytic promiscuous" enzymes, which possess additional activities besides their "native" activity, albeit with a lower efficiency than the main reaction, have become a new frontier for biochemistry and have received considerable attention. Catalytic promiscuity has been suggested to contribute to enzyme evolution through the mechanism of gene duplication followed by specialization of one of the two copies for the new function. Mimicking this evolutionary shortcut could also provide a more efficient route to changing the function of proteins by directed evolution.

The promiscuous phosphatase PP1 is a member of the phosphoprotein phosphatase (PPP) gene family, which is critical for the …

Juvenile Drug Court: Predictors Of Graduation And Non-Graduation Status, Joshua D. Hoyt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Joshua Hoyt and Dr. David Stein at Utah State University evaluated the differences between juvenile drug court participants who graduate and don’t graduate from the juvenile drug court program in Idaho. Joshua Hoyt and Dr. David Stein coordinated this project with Scott Ronan, Idaho Supreme Court felony sentencing alternative specialist. Dr. David Stein has significant experience in conducting research projects centering on drug courts and will be assisting Joshua Hoyt in the implementation of this thesis project. Further, Scott Ronan has significant experience in working with the juvenile drug court program and has access to data that were used in …