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Identification Of Factors Affecting Bovine Somatic Cell Nuclear Transfer Efficiency And Characterization Of Transcriptional Profiles Of Nuclear Transfer Embryos And Cotyledons, Kenneth Ivan Aston

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since the production of the first sheep by somatic cell nuclear transfer a great deal of effort has been made to improve efficiency and to understand nuclear reprogramming mechanisms. Unfortunately efficiency remains low, and nuclear reprogramming mechanisms remain uncharacterized. The objectives of this research were to identify factors associated with somatic cell nuclear transfer efficiency and to analyze the transcriptome of blastocyst-stage clone and control embryos and cotyledonary tissue in an effort to elucidate mechanisms responsible for the low developmental efficiency and high post-implantation losses.

The experiments reported here identify factors including oocyte source and timing of activation following nuclear …

Parenting Stress And Child Attachment: Child Age Of 10 And 36 Months/Father And Mother, Jeng Hyun Ok

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Parents are the most affective human environmental resources to children. Although the influences from parents continue even after parents passed away, very young children (up to age 3) get the biggest impact from their parents. According to children's independency to parents, parents' psychological well-being determines children's emotional-social development. However, in parenting stress, children also have their own influence to parents in the family context. Regarding parenting stress, many studies have been dedicated to defining the occurrence, co-occurrence, and predictors of parenting stress of parents in various conditions.

This longitudinal research conducted from surveys with 201 Early Head Start families reexamines …

Effects Of A Synthetic Cannabinoid On The Reinforcing Efficacy Of Ethanol In Rats, Ericka M. Bailey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The co-abuse of alcohol and marijuana is widespread, although the mechanisms underlying this behavior are unclear. There is some evidence of a relationship between the neural processes that mediate the effects of ethanol and marijuana. For example, research has shown that exposure to marijuana increases responding for, and intake of, ethanol. The alcohol deprivation effect is an anima l model of alcoholism that suggests that the reinforcing efficacy of ethanol, as measured by intake, increases following a period of deprivation. Recent research indicates that rats chronically exposed to marijuana during periods of alcohol deprivation consume ethanol above and beyond deprivation …

The Red Top Model: A Landscape-Scale Integrodifference Equation Model Of The Mountain Pine Beetle-Lodgepole Pine Forest Interaction, Justin Heavilin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Under normative conditions the mountain pine beetle (Dendroctonus ponderosae Hopkins) has played a regulating role in healthy lodgepole pine (Pinus contorta) forests. However, recently eruptive outbreaks that result from large pine beetle populations have destroyed vast tracts of valuable forest. The outbreaks in North America have received a great deal of attention from both the timber industry and government agencies as well as biologists and ecologists.

In this dissertation we develop a landscape-scaled integrodifference equation model describing the mountain pine beetle and its effect on a lodgepole pine forest. The model is built upon a stage-structured model …

Dynamics Of Spatial Pattern Formation: Cases Of Spikes And Droplets, Yuya Sasaki

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis studies the gradient system that forms spatial patterns such that the minimum distances of pairs among various points are maximized in the end. As this problem innately involves singularity issues, an extended system of the gradient system is proposed. Motivated by the spatial pattern suggested by a numerical example, this extended system is applied to a three-point problem and then to a two-point problem in a quotient space of ℝ² modulo a lattice.

Comparison Of Water Dynamics In Aspen And Conifer: Implications For Ecology Water Yield Augmentation, Eric Martin Lamalfa

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Differences in water dynamics between deciduous aspen (Populus tremuloides) and co-occurring evergreen conifer species in the Northern Rocky Mountains result from complex physical and biological interactions. A comprehensive evaluation of individual water transfer mechanisms was used to elucidate the relative importance of several components of the hydro logic cycles of aspen and conifer, and determine which water transfer mechanisms have potential to cause differences in net water yield.

Adjacent aspen and conifer stands were monitored to determine snow accumulation and ablation (snow survey), soil moisture recharge (capacitance probes), snowpack sublimation (sublimation pan), transpiration period (thermal dissipation probes), and …

Bats And Mines: Evaluating Townsend's Big-Eared Bat Maternity Colony Response To Reclamation, Gabrielle F. Diamond

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With the loss or modification of natural roosting habitat afforded by caves, abandoned mines have assumed increased importance as surrogate roosting sites for Townsend's big-eared bats (Corynorhinus townsendii) and other chiropteran species. However, increasing concerns for human safety have led to accelerated programs for mine closure. In efforts to protect roosting sites in mines showing significant bat activity, "bat compatible" gates are installed, thus allowing continued access to mine workings. Aside from ensuring public safety, these structures afford protection from disturbance to roosting bats. To date few posting-gating studies have been conducted to obtain information on the effects …

Breeding Behavior And Space Use Of Male And Female Mule Deer: An Examination Of Potential Risk Differences For Chronic Wasting Disease Infection, Leslie R. Mcfarlane

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The dynamics of pathogen and host relationships relative to disease transmission in wildlife populations are important ecological processes to understand, particularly since spatial dynamics of disease can be driven by movement, behavior, and dispersal of animals. Chronic Wasting Disease (CWD) is an example of this important interface, where little is known regarding origin of the disease or routes of transmission. Surveillance data for CWD in free-ranging mule deer indicates that breeding-age male deer have 2-4 times higher prevalence rates than females or younger age males. In an effort to understand differences that might increase risk for exposure to CWD infective …

Effects Of Quaternary Climate Change On Tributary Sedimentation And Geomorphology In Eastern Grand Canyon, Benjamin D. Dejong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Climate variability has had a dramatic impact on eastern Grand Canyon tributaries over the past ~100 ky. This is readily observed in the Lava Chuar and Comanche catchments, which host well preserved colluvial remnants and river terraces that resulted from several climate-induced cycles of aggradation and incision. This study investigates these climate responses using surveying, sedimentology, and luminescence geochronology methods to investigate the mechanisms and timing of their deposition.

The survey data demonstrate that the concavity of terrace treads is lower than modern drainages. The sedimentology suggests the prevalence of stream-flow reworking of debris flow deposits and portrays an expected …

The Timing And Magnitude Of Channel Adjustments In The Upper Green River Below Flaming Gorge Dam In Browns Park And Lodore Canyon, Colorado: An Analysis Of The Pre- And Post-Dam River Using High-Resolution Dendrogeomorphology And Repeat Topographic Surveys, Jason S. Alexander

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Channel narrowing on the Green River in Utah and Colorado has been well documented by several authors and has been attributed to reductions in flow after 1930, the construction of Flaming Gorge Dam (FGD), and the invasion of the woody riparian plant Tamarisk (tamarix ramosissima). Narrowing has occurred through the deposition of inset floodplains, which have vertically accreted within a previously larger active channel. Prior to closure of FGD, lower magnitude floods aggraded surfaces in the areas of the channel that had the highest divergence in the velocity flow field (i.e. bars and banks). These surfaces later became …

Vascular Conditions, Risk Factors And Depression Chronicity In Late-Onset Major Depression, Robert D. Lisota

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Research examining a possible relationship between vascular factors and late-life depression in the elderly has produced both evidence for and against a "vascular depression" hypothesis, which posits that late-life depression may have a vascular or neurological etiology. It was hypothesized that a depressive disorder that is primarily the result of structural changes in the brain due to vascular conditions in late-life may be related to increased depression chronicity. We examined data from the Cache County Study on Memory, Health, and Aging to determine whether support for the concept of vascular risk for depression and increased chronicity were present in an …

Phenotypic And Genotypic Analysis Of Amino Acid Metabolism In Lactobacillus Helveticus Cnrz 32, Jason K. Christiansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study investigated genetic predictions for amino acid biosynthesis and catabolism by Lactobacillus helveticus CNRZ 32, a commercial cheese flavor adjunct that reduces bitterness and intensifies flavor notes. Conversion of amino acids into volatile and nonvolatile flavor compounds by L. helveticus and other lactic acid bacteria in cheese is thought to represent the rate-limiting step in the development of mature cheese flavor and aroma. One of the primary mechanisms for amino acid breakdown by these microbes involves the reversible action of enzymes involved in biosynthetic pathways, so our group investigated the genetics of amino acid biosynthesis in L. helveticus CNRZ …

Control Of Listeria Monocytogenes In Ready-To-Eat Meat Containing Levulinate, Lactate, Or Lactate And Diacetate, Rebecca L. Thompson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Control of the pathogen Listeria monocytogenes in ready-to-eat (RTE) meats is a major concern in the food industry. The objective of this study was to compare the growth of L. monocytogenes on refrigerated RTE meats containing sodium levulinate (4-oxopentanoic acid, a five carbon organic acid with GRAS status), sodium lactate, or a combination of sodium lactate and sodium diacetate. Turkey roll and bologna were prepared to contain (wt/wt) sodium lactate (2%); sodium lactate in combination with sodium diacetate (1.875% sodium lactate, 0.125% sodium diacetate); sodium levulinate (1, 2, or 3%); or no antilisterial additive. Samples were sliced, inoculated with a …

Relationship Between Dietary Calcium Intake And Weight Gain Among College Freshmen At Utah State University, Cara A. Moncur

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The present study was conducted with the use of data from the Freshmen Health Study, a longitudinal study of college freshmen aged 18 that examined change in diet, physical activity, and weight during the first year of college at Utah State University (USU). Participants were assessed at different data collection periods including the beginning and end of their first semester attending USU. Participants' height and weight were measured and they were given a self-administered Food Frequency Questionnaire at each data collection. Simple linear and multivariate logistic regression was used to assess how dietary calcium intake related to weight change over …

Use Of Fourier Transform Infrared Spectroscopy For The Classification And Identification Of Bacteria Of Importance To The Food Industry, Sarah Pegram

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The aim of this work was to use Fourier Transform Infrared Spectroscopy to characterize and identify bacteria of particular significance to the food industry. FT-IR spectroscopy is a rapid technique that can be applied to all groups of bacteria. The two objectives were to determine a suitable sampling procedure to record a spectrum and to determine a suitable statistical technique to identify characteristic regions of the spectrum associated with the genus and, potentially, the species. Pure cultures of bacteria were grown in broth, suspended in saline and dried to produce a film on a halide salt crystal. These films were …

Premarital Preparation And Marital Satisfaction: What Utah Individuals Are Doing To Prepare For Marriage And How Premarital Preparation Can Enhance Marital Satisfaction, Fay L. Belnap Foster

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This is a systematic representative sample study of newlyweds designed to investigate aspects of participation in marriage preparation activities as well as determine what effect participation in activities had on marital satisfaction. A retrospective survey instrument was utilized which included the Kansas Marital Satisfaction Scale.

Statistical analysis revealed that the majority of individuals in Utah prepare for marriage by visiting with parents or relatives, visiting with other married couples, and talking with religious leaders, and considered these activities to be helpful in their preparation. The smaller percentage of individuals who participated in more formal preparation activities also considered these activities …

Therapeutic Processes In A Cognitive-Behavioral Treatment For Depressed Adolescents With Inflammatory Bowel Disease, Meredith Brent

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Youth with inflammatory bowel disease (IBD) have higher rates of depression than healthy youth. A cognitive-behavioral treatment, primary and secondary control enhancement training-physical illness (PASCET-PI), for depressed adolescents with IBD was associated with reductions in depressive symptoms. The purpose of this study was to examine the salience of nonspecific processes (factors inherent in any human relationship) and specific processes (factors related to therapy content) during PASCET-PI sessions and their association with improvements in psychological functioning.

Participants included 10 adolescent patients with IBD with mean illness duration of 31.9 months. At intake, eight participants qualified for a diagnosis of major depressive …

Antimicrobial Properties Of Syringopeptin 25a And Rhamnolipids, Prerak T. Desai

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The increasing bacterial resistance to available antibiotics requires the search for new antibacterial compounds to be broadened. This study investigated the antimicrobial properties of two secondary metabolites from fluorescent pseudomonads -- syringopeptin 25A, a lipodepsipeptide produced by Pseudomonas syringae pv. syringae, and a rhamnolipid mixture produced by Pseudomonas aeruginosa. The rate of antimicrobial action was determined by monitoring the rate of uptake of propidium iodide during exposure to the compounds. Inhibition was also confirmed by the microbroth dilution method to determine the MI Cs. Both the compounds inhibited growth of Gram-positive organisms, including Mycobacterium smegmatis, staphylococci, and …

History Of The Logan Bluff Landslide Zone, Seth P. Olsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

On September 10, 2005, a landslide occurred to the south of Utah State University Campus and Highway 89. This landslide did considerable damage to the Logan and Northern canal, which is cut into the slope, and to a residence at the toe of the slope. This event brought many parties together to collaborate on possible solutions to the immediate fix of the slide as well slides that could occur in the future. The purpose of this report is to compile information useful to the study of the area and the possible solutions and/or risk assessment of the Logan Bluff Landslide …

The Relative Effects Of Education And Cognitive Complexity Of Employment Experience On The Rate Of Cognitive Decline In Elderly Women, Janet M. Lundahl

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis examined the lifetime exposure of women's employment on cognitive functioning and cognitive decline in late life.

From the Cache County Study on Memory, Health, & Aging data, a sample of 2,588 women, aged 65 and older gave retrospective occupational history and were screened using the Modified Mini-Mental State Exam at study entry and approximately 3 years later. Non-demented women were used.

Ordinary least squares regression was used cross-sectionally and longitudinally to test the association between cognitive complexity level of the longest job and baseline cognitive status, and rate of cognitive decline over approximately 3 years.

Cross-sectional analysis revealed …

Culture, Gender, Identity, And Adolescents' Niche-Building Behavior: A Cross-Cultural Comparison, Archana Singh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A cross-cultural examination of a selected group of Indian and American adolescents was conducted to understand the influence of cultural expectations, gender, and identity on adolescents' niche-building behavior. For the purpose of the present study, adolescents' niche was limited to their bedrooms. Data were collected from 285 American adolescents of which 151 were females and 134 were males. The Indian sample consisted of 198 adolescents of whom 75 were females, 118 were males, and 5 adolescents who did not mention their gender. Participants from both cultures were from eighth and ninth grades, with an age range of 12.17 to 16.50 …

Cognitive Autonomy In Adolescence, Ruth A. Thompson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined the relationship between areas of cognitive autonomy and adolescent development. Differences in cognitive autonomy between age groups were analyzed. Students attending Grades 7, 9, and 11, and college students in Northern Utah participated in this study. Three hundred and ninety-six participants responded to the Cognitive Autonomy and Self-Evaluation(CASE) inventory, which examined the subcategories of evaluative thinking, voicing opinions, comparative validation, decision making, and self-assessment.

Scores were compared by grade and by gender. Results showed that college students scored significantly higher in three of the five areas of cognitive autonomy. Additionally, females in both ninth grade and college …

Towards A More Comprehensive View Of The Use Of Power Between Couple Members In Adolescent Romantic Relationships, Charles George Bentley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study investigated the construct of power in adolescent romantic couples using multiple measures. The project examined gender differences in power, created models of powerlessness for each gender, and examined relations between power and aggression and relationship quality. Participants were 90 heterosexual couples, aged 14-18 years old, living in rural areas in Utah and Arizona. Couple members completed surveys assessing attitudes and behaviors in their relationships and a video-recall procedure in which partners rated their own and their partner's behaviors during problem solving discussion.

Few gender differences emerged in reports of perpetration of aggression, but boyfriends reported higher levels of …

Historical Biogeography Of North American Nightsnakes And Their Relationships Among The Dipsadines: Evidence For Vicariance Associated With Miocene Formations Of Northwestern Mexico, Daniel G. Mulcahy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

I used a hierarchical approach to study historical biogeography in a group of colubrid snakes found in western North America. I combined small regions of mtDNA sequence data from a large number of individuals, with complete mt-genomic data. First, I investigated the relationships among leptodeirines—a presumed subgroup of dipsadines, including nightsnakes (Pseudoleptodeira, Eridiphas, and Hypsiglena)—using ~1.5 kb of data (cob and nad4). The relationships differed among parsimony, likelihood, and Bayesian analyses. All analyses supported the monophyly of the nightsnakes; however, none supported the monophyly of the leptodeirines. Instead, these data supported a new hypothesis …

Single Parenting Of Early Adolescents: Clinical Application To A More Helpful Perspective, Ane Weed

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to discover the most important self-identified areas for a particular group of single parents to focus their limited time. Single parents have been pathologized and compared to two-parent families. A strength-based perspective that acknowledges single parent families as a legitimate family system with the possibility for being healthy may be more helpful. The objective of this study was to identify common strengths between self-reported satisfied single parents (n = 86) and early adolescent children of single parents (n = 67) through data collected with the use of the Parent Success Indicator (PSI) …

Fathers' Perceptions Of Relationships With Young Adolescent Children: Implications For Family Therapy, Tyler D. Patrick

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study used family systems theory as a lens to examine fathers' relationships with young adolescent children as it relates to the areas of time spent together, communication between generations, and paternal satisfaction in raising an early adolescent child. Similarities and differences of scores on the Parent Success Indicator were examined for 191 Caucasian American (n=110) and African American (n=81) fathers of 10- to 14-year-old-children. Results showed that increased amounts of time that fathers report spending with children was significantly associated with paternal satisfaction, communication between generations, fathers' use of time, parental frustration, and parental teaching. …

Tapirs And Rhinoceroses In Captivity: An Examination Of The North American Captive Populations And Their Husbandry, Lisa A. Nordstrom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

All species of Tapiridae and Rhinocerotidae are threatened or endangered in the wild. Captive populations have been established for most of these species, but successful management has proved challenging. Effective ex situ conservation strategies, however, rely on the ability of zoological institutions to maintain and breed these endangered species. In this study, I examined the captive environment to identify the factors associated with reproduction, mortality, and health of rhinos and tapirs. Zoological institutions in the North American region that currently housed rhinos and/or tapirs were surveyed in 2003. Attaining an approximately 90% response rate, I compiled information on the following …

Use Of Natural Antioxidants To Control Oxidative Rancidity In Cooked Meats, Mihir Vasavada

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The research in this dissertation focused on determining antioxidant effects of various natural antioxidants in cooked meat systems. Milk mineral (MM), spices, and raisin paste were used in cooked meat systems to verify their potential antioxidant properties.

The MM study determined the antioxidant activity of 1.5% MM added to uncured cooked beef meatballs, and possible additive effects of MM in combination with 20-ppm or 40-ppm sodium nitrate in cooked beef sausages. There was no additive inhibition of lipid oxidation in samples containing 20-ppm or 40-ppm sodium nitrite plus 1.5% MM. Cooked meat yield was not different between control meatballs and …

Vascular Plant Species Richness And Distribution In A Heterogeneous Landscape, Kelly J. Mccloskey

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The distribution of vascular plant species and species richness in a mid-elevation Rocky Mountain landscape can be attributed to a number of variables. The distribution of species with respect to physiognomic type, patch size, shape, and environmental heterogeneity was assessed for a mosaic landscape comprised of conifer forest, deciduous forest, and shrub-steppe physiognomic types in the southwest comer of Grand Teton National Park, Wyoming. This vegetation is representative of that found in other montane landscapes of the central Rocky Mountains. The vegetation was mapped to physiognomic type; distinct vegetation patches were sampled using one or more small (50 m^{2 …}

Burnout In Marriage And Family Therapists, Cory A. Eddington

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Among the profession of marriage and family therapy, the goal is to help those individuals, couples, and families that are struggling in life. While working with these clients there is the possibility that the therapists may become stressed themselves and experience burnout. The following is a descriptive study of 30 marriage and family therapists (MFTs) in the state of Utah. The demographic variables of clinical experience, sex, case load, setting of practice, education level, and marital status were studied as to their relation to the experience of burnout. Statistically significant findings demonstrated that the variables of sex and caseload were …