Digital Commons Network^™

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, …

Casein Supramolecules: Structure And Coagulation Properties, Bonney S. Oommen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The changes in quaternary structure of casein supramolecules with various physical and chemical treatments were studied using transmission electron microscopy, and a model to account for the changes is put forth. The effects of casein structure on coagulation properties were also studied. The sample preparation for transmission electron microscopy involved physical methods of fixation and flash freeing to preserve the structure of caseins in the sample.

The structure of caseins in sodium and calcium caseinate varied with sodium caseinate not exhibiting any spherical structure as opposed to the spherical structure seen in calcium caseinate, non-fat dried milk and native milk. …

Cultivation Of Mushroom Mycelia Using Whey Products As A Growth Substrate, Boyd S. Inglet

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

As part of a project designed to utilize common dairy waste products profitably, reconstituted dry whey permeate and delactosed whey were tested as growth substrates for mycelia of the edible mushroom Lentinus edodes. This mushroom was chosen because it is possible to profitably cultivate it due to its popular culinary appeal and perceived medical benefits.

Growth experiments were performed in petri dishes containing either reconstituted dry whey permeate or delactosed whey as a growth substrate, and the measured response was the size of the growing mycelia colony. When reconstituted dry whey permeate was utilized as a growth substrate, the …

Nutrition And Bone Density In Children With Cystic Fibrosis, Joanna K. Davidson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of these studies was to further research on bone density in children with cystic fibrosis, particularly as it pertains to nutritional parameters and care. The first paper presented a comparison of a group of 50 children with cystic fibrosis to a group of 32 control children. There were no significant differences between the groups in any of the pertinent bone density measurements. Serum 25(OH) vitamin D was positively correlated with spine density z score in the cystic fibrosis group.

The second paper, incorporating all of the information obtained from the first paper, describes an intervention study with the …

Parents' Knowledge And Attitudes About Immunization In India, Anne George

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Childhood immunization is acknowledged as being a crucial health intervention for children. Immunization rates of children may vary depending on their parents' knowledge and attitudes about the issue. The focus of this study is on parents' knowledge and attitudes about immunization, and employs Urie Bronfenbrenner's ecological systems theory. A questionnaire was administered to 233 parents in India to explore the issues of parental immunization knowledge and attitudes. Correlates of parental knowledge and attitudes that were explored included gender, education, respondents' immunization status, and children's immunization status. Sources of parental knowledge about immunization were also examined. Overall, parents in this sample …

The Role Of Deception In Mediating Relationship Involvement Of Couples Interacting On The Internet: Stages Of Intimate Formation, Dustin W. Edgerton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A vast majority of individuals involve themselves in an intimate relationship at one time or another. This study looks at a new, but increasing, forum of relationship development, that of the Internet. More specifically, this study addresses various stages of Internet relationship development, and deception individual 's use during the process of forming and maintaining these relationships.

This research gathered quantitative and qualitative information from 134 individuals involved in online relationships. The quantitative analyses provided only a few significant findings and it is suggested that the current methods of measuring deception are inadequate and do not appear to represent the …

Factors That Influence The College Attendance Decisions Of Appalachian Students, Erica Chenoweth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The current study sought to examine the factors that influence the decisions of Appalachian high school students regarding college attendance. Using Bronfenbrenner's ecological systems theory of human development (1986) as a theoretical basis, direct and indirect influences of environmental factors upon the academic aspirations of Appalachian youth were examined using survey methodology. Results indicated that predictors of college attendance for Appalachian students are not significantly different from those of students elsewhere. Variables reflective of individual academic preparation were most salient in predicting college aspirations for both males and females. Other important predictors included parent education, parent occupation, and socioeconomic status. …

On-Campus And Off-Campus Students' Ratings Of Instruction And Courses, Noriko Saeki

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The associations of student ratings of instruction and courses (SRIC) with noninstructional variables (e.g., class size, expected grade) were examined in three instructional delivery groups--on-campus, off-campus face-to-face, and distance education courses. Factor analysis of SRIC from a 20-item form yielded two highly correlated factors, which differed somewhat across the groups ("Course " and "Instruction"; "Course/Instruction" and "Interaction Opportunities /Instructor Availability"; "Course/Instruction" and "Interaction Opportunities/Helpfulness"). The only educationally significant (r² > .05) zero-order correlations were between SRIC total scores and expected grade, and were positive in all three groups (r² = .07, .08, .06). In multiple regression analyses, …

Test Of A Psychosocial Strain Model Of Delinquency For Mexican American Youth, Jose De Jesus Rodriguez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purposes of this study were twofold: (1) to compare rates of delinquency between Mexican American and European American adolescents, and (2) to test the application of a model of delinquency designed to be especially relevant to Mexican American adolescents. The study is one of the first attempts to advance knowledge about delinquency among Mexican American adolescents through the development and test of a comprehensive model of delinquency. The model constructed as part of this study—labeled the psychosocial strain model—was unique in that it integrated variables from different theoretical perspectives and its construction was guided by knowledge of cultural and …

Phylogenetic Position Of Pterocommatinae And Cavariella, And Implications For The Origins Of Host Alternation In Aphids, Carol A. Rowe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Aphids are morphologically simple. Their numerous hypothesized convergent reductions, such as reduced siphunculi length in association with ant attendance, have made it difficult to define morphological synapomorphies that are necessary for phylogenetic studies. Thus, I used molecular characters both to reexamine the phylogenetic relationships of Cavariella and Pterocommatinae within Aphididae, and to further map host associations and life cycles onto these phylogenies to better understand the evolutionary lability of host alternation within Aphididae. Independent and combined analyses were performed under unweighted parsimony and maximum likelihood criteria for sequences of mitochondrial cytochrome oxidase II plus tRNA-Leucine plus partial cytochrome oxidase I …

The Influence Of Fat And Water On The Melted Cheese Characteristics Of Mozzarella Cheese, Robert Lloyd Fife

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of reducing the fat content of low-moisture part-skim Mozzarella cheese from 19% to less than 5% on melted cheese properties, i.e., apparent viscosity, cheese melt, and cook color, was investigated. Functional properties of melt and stretch and cook color were evaluated at d 1, 7, 14, and 28. A rapid microwave oven method underestimated the moisture content of the low fat cheeses by approximately 10%. Low fat cheese did not melt as well as did the low-moisture part-skim Mozzarella cheese although the moisture content of the low fat cheese (moisture content ranged from 62.5% to 63.6%) was greater …

Physiological And Biochemical Aspects Of Agrobacterium-Wheat (Triticum Aestivum L.) Interactions, David L. Parrott Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Agrobacterium tumefaciens and A. rhizogenes are the causal agents of gall or hairy root disease, but normally the bacteria do not cause disease in wheat. However, both bacteria grew without inhibition when exposed to intact or wounded wheat roots or embryos, and they colonized wheat root surfaces to levels similar to dicotyledonous plants. A. tumefaciens and A. rhizogenes induced 23% cell death after a 1-h exposure to wheat embryo cells grown in 7.4 mM O₂, while the extent of cell death at 2.1 mM O₂ was 8%. Contact with A. tumefaciens or A. rhizogenes caused cultured wheat …

Student And Parent Views On School And Community Strengths And Concerns, Tricia Hill Danielson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Lincoln Elementary School needs assessment surveyed students in the third through fifth grades and their parents in order to identify strengths and concerns in their school and community. It also investigated whether or not participants considered family counseling skills as a concern or a strength. The results showed that the concerns and strengths identified by participants fell into three categories: family, community, and school. Parents' primary concern was children watching TV, while children's primary concern was getting enough sleep. Group differences were identified by ethnicity, gender, and marital status. These differences included English/Spanish skills, children showing respect for authority, …

The Relationship Between Emotional Intelligence And Adolescent Deviant Behavior, Jennifer R. Lance

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis summarizes a study conducted to explore the relationship between emotional intelligence and adolescent deviancy. The primary goal of this study was to investigate the relation between 1) overall emotional intelligence plus its subscales and overall normative deviant behavior, and 2) emotional intelligence subscales and subscales of a deviancy measure. Tapia's Emotional Intelligence Inventory (EII) and Vazsonyi's Normative Deviancy Scale (NDS) were used to measure the two variables of this study. Subjects included 152 high school students, aged 14-18, from a small city in Northern Utah. One hundred seventeen students came from a local high school comprising grades 10-12 …

Shared Book Reading, Home Visit Processes, And The Relation With Low-Income Infants' Language Development, Katie Christiansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Language is important for children to succeed in school. Language development begins early in a child's life and can be facilitated by a supportive language environment. Shared book reading is an important aspect of the language environment a child experiences.

This study utilized data from twenty children living in low-income families. These children are part of the Rural Utah Child Development Head Start and receive weekly visits from home visitors. Two home visits were videotaped and coded for parental and home visitor language facilitation behaviors. A parent interview was also completed to obtain participant demographic information and measure child and …

Community Factors That Correlate With Middle-Adolescent Antisocial Behavior, Olga Kamenchuk

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Many adolescents nowadays display antisocial behavior. A large number of theories explaining origin of antisocial behavior have been developed in the last several centuries. The current study utilizes the "ecological" theoretical framework that allows the researcher to consider multiple ecological systems in which individuals operate and to focus on the community factors influencing antisocial behavior.

The researcher used part of the Prevention Needs Assessment survey to identify which community risk and protective factors correlate with middle-adolescent antisocial behavior. Analysis included intercluster, cluster-item correlations, and partial correlations. Results indicated correlations between antisocial behavior and a number of community risk factors, and …

Adolescent Peer Perceptions Reflected In The Yearbooks Of Mormon Homosexual And Heterosexual Men, David C. Pruden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study explored the peer perceptions of adolescent heterosexual males and their homosexual counterparts who had not disclosed their feelings of erotic same-sex attraction to their classmates. The study focused on members of The Church of Jesus Christ of Latter-day Saints, a conservative Christian denomination with clear doctrinal prohibitions against homosexual behavior. The handwritten messages from peers found in the senior high school yearbooks of 30 heterosexual and 30 same-sex attracted adolescent men were content analyzed to examine similarities and differences in the themes that emerged from the data.

The results indicated that there is a difference in the kind …

Rituals And Adoptive Families, Michelle Amber Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to discover the type of rituals utilized by adoptive families to welcome a child into their home. Family members obtain a sense of identity through the enactment of rituals. Forming family identity is especially important to the adoption process. This study examined the types and amount of rituals reported by 20 adoptive couples. The top five most helpful rituals were obtained. The rituals were then divided up into categories. The results of this study found that patterned interaction rituals are used most often and are most helpful in welcoming an adoptive child. Family traditions …

Premarital Education: Participation, Attitudes, And Relation To Marital Adjustment In A Sample From Northern Utah, Bryan D. Ramboz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to investigate the attitudes, participation in, and potential effectiveness of premarital education as a vehicle to promote more satisfying marriages. A retrospective survey instrument, including existing measures of religious values, willingness to invest in marriage, and marital satisfaction, was used to gather data to answer research questions related to couples' participation in, and attitudes about premarital education, and their influence on marital adjustment and satisfaction. Information about the amount of Time spent in premarital education, breadth of Topics covered, Training of the provider, and whether or not Testing was performed also was gathered and …

The Journey Of Education: Characteristics Of Shoshone-Bannock High School And Community Members On The Fort Hall Indian Reservation, Ed Galindo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation examined personal, cultural, school, and family factors that contribute to the decision of Native American students to remain in school until graduation or to drop out. One hundred eighty-one participants who had either graduated or dropped out of school completed a 140-item questionnaire. Participants lived on the Shoshone-Bannock Indian Reservation located at Fort Hall, Idaho.

Factors examined in the survey instrument included substance abuse by self or family members, peer pressure, trouble with the law, self-esteem, teen pregnancy, family structure, socioeconomic status, parents education, academic achievement, teacher attitudes and expectations, school attendance, tribal self-identity and pride, and bilingualism. …

Using Immune Modulators To Ameliorate Aleutian Disease In Mink, Kie Hoon Jung

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Aleutian disease of mink (AD) is an immunopathological disorder induced by persistent infection with AD virus. Many breeds of mink seem to have a high susceptibility to AD. Interestingly, the primary feature of AD in susceptible adult mink is a chronic, fatal immune complex-mediated glomerulonephritis comparable to that seen in human diseases such as systemic lupus erythematosus. Because of its comparative aspects to human diseases and the substantial economic loss to the fur industries in the world, classical AD and the nature of the virus has been studied extensively for three decades. Currently no therapies are available and vaccination has …

An Ecological/Life History Comparison Of Two Whitefish Species In Bear Lake, Utah/Idaho, Brett W. Thompson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ecological traits of the endemic Bear Lake whitefish Prosoopium abyssicola and the Bonneville whitefish prosopium silonotus were investigated. Spatial distributions indicated distinctive differences in depth contour preference. Catch per unit effort data indicated that Bonneville whitefish prefer shallow depths and warmer water temperatures, whereas Bear Lake whitefish prefer deep, cold water.

Diet differences between the two species were large. Differences in both age distribution and growth rate patterns were also observed. The Bonneville whitefish population was predominantly composed of juvenile age classes. Very large adults reached ages of 12-14 years. Bear Lake whitefish exhibited a different population structure with few …

Assessing The Effects Of Myxobolus Cerebralis And Other Environmental Factors On The Dynamics, Abundance, And Distribution Of Trout Populations In The Logan River, Utah, Ernesto A. De La Hoz Franco

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The presence of nonnative trout and the recent introduction of Myxobolus cerebralis in the Logan River drainage pose a threat to the native Bonneville cutthroat trout population (Oncorhynchus clarki Utah). The variability in the response of susceptible trout populations to M. cerebralis, causing agent of whirling disease, suggests that environmental factors may influence the effects of the parasite in infected environments. I investigated the relationship between temperature, discharge, substrate size, nutrient concentration (nitrogen and phosphorus), periphyton (chlorophyll a), and the relative abundance of Tubifex tubifex to the distribution, and prevalence of M. cerebralis in wild salmonid populations and …

Factors Affecting Spawning And Survival Of Bear Lake Bonneville Cutthroat Trout In St. Charles Creek, Idaho, Paul Burnett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

I described the spawning ecology of the Bear Lake Bonneville cutthroat trout (BLBCT) in St. Charles Creek. I tracked cutthroat trout with used radio telemetry. I conducted redd counts to describe spawning conditions. Most cutthroat trout in the Big Arm strayed into the Bear River. Cutthroat trout migrations in the Little Arm and main fork were very limited (< 4 km). Redd distributions showed very similar patterns between 1989, 2000 and 2001 with most redds being built in the lowest kilometer of stream. Artificial fish transportation changed the redd distribution in 2002. More redds were built in the main fork and redds were distributed throughout the stream. Redds built in the main fork were characterized by lower levels of fine sediment and higher water velocities as compared to the redds built on the Little Arm. The results of this research will be used to aid resource managers in developing a management plan for wild BLBCT.

Determining The Factors That Control Respiration And Carbon Use Efficiency In Crop Plants, Jonathan M. Frantz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the literature on plant respiration, there are two viewpoints concerning the source of respiratory control: supply (photosynthate availability) or demand (temperature dependent) limitations. While different studies indicate the primary dependency for respiration is either the supply or demand side, the two paradigms cannot both be true. The relative importance of each paradigm may depend on a number of factors including period of time during which respiration is measured, phase of plant development, environmental conditions, and species.

Studies were performed using continuous CO₂ gas-exchange instrumentation to monitor short- and long-term changes in whole canopies of lettuce, tomato, soybean, and …

Breeding Bird Communities Of Major Mainland Rivers Of Southeastern Alaska, Jim A. Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Because of the scarcity of information for bird communities at the major mainland rivers of southeastern Alaska, the main objective of this study was to provide baseline information including distribution, status, and habitat associations of breeding birds.

I conducted a meta-analysis of all known reports (including the current study) conducted at major mainland rivers during the breeding season. I described bird species composition, distribution, abundance estimates, status, habitat associations, and guild membership for all birds recorded at 11 major mainland rivers. Based on incidental observations, 170 species were recorded by all studies. Of these, 134 species were known or suspected …

The Foraging Behavior Of A Solitary Bee, Diadasia Nigrifrons (Hymenoptera: Anthophoridae) On Sidalcea Oregana, Ssp. Oregana, Kimberly A. Kuta

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Foraging studies have established that bees typically obey a set of movement rules when foraging on vertical inflorescences: they begin foraging at the bottom of an inflorescence, move upward, visit a fraction of the available flowers, and leave before reaching the top of the inflorescence. These behaviors are purported to maximize bee foraging efficiency by concentrating their efforts on the most rewarding flowers and minimizing flower revisits. Bees also increase their efficiency by selecting inflorescences with many flowers, visiting more flowers per inflorescence, and remaining in resource-rich areas. To test these hypotheses on plants with more complicated flower arrangements, I …

Simulation Of Wind Dispersal Of Tree Seeds, Tree Colonization, And Growth Of Bottomland Hardwood Reforestation Sites Of The Mississippi Alluvial Valley, Timothy James Nuttle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tree community composition in bottomland hardwood reforestation sites is considerably less diverse than natural bottomland hardwood forests. This study sought to understand the mechanisms behind failure to develop diverse tree communities. First, I developed a mechanistic model of seed dispersal by wind in spatially variable environments. Second, I developed a spatially explicit simulation model of forest dynamics that includes this wind-dispersal model to investigate whether diversity is limited by dispersal or interactions among species and individuals. Finally, I performed model experiments to determine if manipulations of stand structure might help improve conditions for colonization of various species, thus enhancing diversity …

Species Pairwise Associations Over Nine Years Of Secondary Succession: Assessing Alternative Explanations And Successional Mechanisms, Lara R. Rozzell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The importance and mechanisms of species interactions are undetermined in most successional systems. I used correlations and null modeling to detect pairwise species associations between 33 plant species in the first nine years of secondary succession after logging and burning in a western Oregon Cascade forest. I tested for correlations between each species and soil nutrients, nonvegetative ground cover, and surrounding vegetation. More positive than negative associations were found at all sampling times. The proportion of positive associations decreased and negative associations increased through time. Up to 42% of associations at a sampling time were explicable by shared positive correlations …

Quaternary Geology And Landscape Evolution Of Eastern Grand Canyon, Arizona, Matt D. Anders

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tectonics and drainage evolution are controlling overall landscape incision in eastern Grand Canyon. Superimposed on downcutting are dynamic responses of hillslopes, tributary streams, and the Colorado River to glacial-interglacial climate cycles. Five tributary stream fill terraces have been identified, and luminescence dating indicates aggradation was occurring 50- 34 ka {S3), 12-7 ka (S2), and 5-3.5 ka (S1). Seven Colorado River fill terraces have been identified, and luminescence and U-series dating indicate deposition was occurring 343-322 ka (M5), 151-118 ka (M4), and 71-64 ka (M3).

Aggradation by the Colorado River in eastern Grand Canyon begins during glacial advances and continues into …