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2006

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Movement Behavior And Habitat Selection Of The Endangered June Sucker (Chasmistes Liorus) In Utah Lake, Utah, Kris A. Buelow May 2006

Movement Behavior And Habitat Selection Of The Endangered June Sucker (Chasmistes Liorus) In Utah Lake, Utah, Kris A. Buelow

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The June sucker (Chasmistes liorus) is a pelagic feeding sucker endemic to Utah Lake, Utah. It has been listed as an endangered species with the present population being estimated with as few as 300 individuals. Efforts to reinvigorate the population by placing breeding age individuals and augmenting the population with hatchery-reared fish have proved to have had limited success. At this stage there is an imperative to understand the behavioral traits and life history of June sucker to retrieve them from the brink. Previous efforts have been hampered by few individuals and a difficult habitat to study. Utah …

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Microbial Ecology Of An Animal Waste-Fueled Induced Blanket Reactor, Steven C. Curtis May 2006

Microbial Ecology Of An Animal Waste-Fueled Induced Blanket Reactor, Steven C. Curtis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Use of an induced blanket reactor (IBR) to break down organic matter into methane is a financially attractive method to reduce the environmental impact of animal or industrial waste. In order to better understand the biological processes involved with the conversion of waste to biogas by an IBR, it is necessary to gain a better understanding of the microorganisms and their roles in the reactor. Molecular techniques based on the isolation of 16S rDNA were used in order to avoid the limitations posed by conventional culture-based techniques. Total DNA was extracted and amplified using universal primers specific to eubacteria and …

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Milk Intake In Early And Late Adulthood And Risk Of Osteoporotic Hip Fractures In Utah, Melanie Jean Slavens May 2006

Milk Intake In Early And Late Adulthood And Risk Of Osteoporotic Hip Fractures In Utah, Melanie Jean Slavens

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The relationship between milk intake and risk of osteoporotic fractures is uncertain. Associations between milk intake and milk avoidance in relation to osteoporotic hip fracture were examined in the Utah Study of Nutrition and Bone Health (USNBH), a statewide case-control study. Cases were ascertained at Utah hospitals treating 98 percent of hip fractures during 1997-2001 and included 1188 men and women aged 50-89 years. Age- and gender-matched controls were randomly selected from Utah driver's license and Medicare databases (N= 1324). In-person interviews were conducted and participants reported frequency of milk intake per week at age 18 and during pregnancy among …

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Addition Of Three Dietary Fibers In An Extruded Whey And Cornstarch Expanded Snack Food, Alisha M. Wood May 2006

Addition Of Three Dietary Fibers In An Extruded Whey And Cornstarch Expanded Snack Food, Alisha M. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Different fiber types were incorporated in an extruded expanded high-protein snack food. Three dietary fibers (powdered cellulose, wheat fiber, and oat fiber) were selected based on ease of extrusion, percent total dietary fiber, visible expansion, and commercial availability. A high-fiber, high-protein snack food containing whey protein, normal cornstarch, and pregelatinized waxy cornstarch was extruded using the three selected fibers. The fibers replaced the normal cornstarch at 30, 60, and 80% yielding extrudates with three fiber levels (18, 36, and 48%). Each treatment or combination of fiber type and extrudate fiber level was extruded in triplicate. A control with no fiber …

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Smoking, Anemia, And Risk Of Oral Clefts In Utah, Melinda Michelle Moss May 2006

Smoking, Anemia, And Risk Of Oral Clefts In Utah, Melinda Michelle Moss

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cigarette smoke contains sufficient carbon monoxide to induce maternal and fetal hypoxia. Hypoxia is a known teratogen, and consequently maternal smoking has been the focus of many studies on adverse birth outcomes, including cleft lip and palate. Current literature of epidemiological studies on smoking and clefts suggests a modest but statistically significant increase in risk of clefting associated with maternal smoking. A biological condition that may also contribute to hypoxia is anemia. Data from the Utah Child and Family Health Study was used to assess the effects of hypoxia-inducing conditions, maternal smoking, anemia, and their interaction, on the risk of …

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Assessing The Cognitive Development Of A Sample Of Infants In Paraguay, Shannon Peairson May 2006

Assessing The Cognitive Development Of A Sample Of Infants In Paraguay, Shannon Peairson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There is very little research to date on infant development in developing countries, including Paraguay. The present study aimed to determine the effects of Pastoral del Nino, an ECD program, in rural Paraguay by assessing two groups of infants. Group 1 (n = 50) was receiving no intervention and group 2 (n =58) was participating in Pastoral del Nino. Both groups were matched for SES and age of infant. Results indicate that group 2 performed better on the Bayley Scales of Infant Development Mental Development Index. Group 1 had a mean MDI score of 77.96 and group 2 …

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Welfare Status, Gender, And The Utilization Of Marital Counseling Services, Courtney A. Wyatt May 2006

Welfare Status, Gender, And The Utilization Of Marital Counseling Services, Courtney A. Wyatt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine how welfare status, gender, and the interaction between welfare status and gender relate to the utilization of counseling services related to marriage (i.e., "marital help-seeking"). This study was a secondary analysis of the Utah Marriage Survey data set from 2003. Two samples were utilized in this study, and generated a total sample of I ,316 participants. The first sample was made up of I, 173 randomly selected Utah households, identified through a random-digit dialing sampling technique. The second sample was obtained from a random selection of current Temporary Assistance for Needy Families …

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Mixed Germ Cell Sex Cord-Stromal Tumors Of The Testis And Ovary. Morphological, Immunohistochemical, And Molecular Genetic Study Of Seven Cases, Michal Michal, Tomas Vanacek, Radek Sima, Petr Mukensnabl, Ondrej Hes, Dmitry V. Kazakov, Jozef Matoska, Anna Zuntova, Vladimir Dvorak, Alexander Talerman May 2006

Mixed Germ Cell Sex Cord-Stromal Tumors Of The Testis And Ovary. Morphological, Immunohistochemical, And Molecular Genetic Study Of Seven Cases, Michal Michal, Tomas Vanacek, Radek Sima, Petr Mukensnabl, Ondrej Hes, Dmitry V. Kazakov, Jozef Matoska, Anna Zuntova, Vladimir Dvorak, Alexander Talerman

Department of Pathology, Anatomy, and Cell Biology Faculty Papers

We present the morphological, immunohistochemical, and molecular genetic features of three cases of testicular and four cases of ovarian mixed germ cell sex cord-stromal tumors (MGSCT). The germ cells in the testicular MGSCTs morphologically differed from those in classical seminomas by lacking the typical "square off" quality of the nuclei. In contrast to the nuclei in classical seminomas, their size in testicular MGSCTs was smaller and nucleoli were inconspicuous and the cytoplasm was Periodic Acid-Schiff(PAS) negative. Quite on the contrary, the variability in the size of the nuclei of the germ cells in the testicular MGSCTs was more similar to …

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The Mythical Speech Of Janine Antoni, Patrick L. Jones May 2006

The Mythical Speech Of Janine Antoni, Patrick L. Jones

Graduate Theses, Dissertations, and Problem Reports (ETD)

The confrontation of societal myths has been a major concern of many female artists since the 1960s. However, confronting the ideological construction of myth is not enough to discredit it. The semiology of myth, according to Roland Barthes (1915-1980), simply absorbs this confrontation by placing the artist in the position of a signifier of the myth itself. Paradoxically, in order to discredit myth the artist must "speak the myth," in order to empty the ideological content of the myth through the adoption of mythical speech. This produces a counter-myth. Language as a vehicle of feminist expression has been a permeating …

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Resilience And Quality Of Life In Taiwanese Survivors Of Childhood Cancer, Li-Na Chou Phd, Msn, Rn May 2006

Resilience And Quality Of Life In Taiwanese Survivors Of Childhood Cancer, Li-Na Chou Phd, Msn, Rn

Dissertations

Survivors of childhood cancer are at risk to develop physiologic-psychosocial complications that affect their quality of life. This study explored how the independent variables of illness-related risk (ILLRK), individual risks (IRK), protective factors (PF) and resilience (RS) affected the dependent variable---quality of life (QOL)--in Taiwanese survivors of childhood cancer. Triangulated research methodology was employed to (1) identify the statistical relationships between the variables and (2) explore qualitatively what these variables meant to the subjects and how their perceptions further explained the statistical results. Haase's (2004) Adolescent Resilience Model was used as the theoretical framework. Ninety-eight Taiwanese adolescent cancer survivors, diagnosed …

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The Dilemma Of Disclosure For College Students With Attention Deficit Disorder, Teresa L. Spoulos Edd May 2006

The Dilemma Of Disclosure For College Students With Attention Deficit Disorder, Teresa L. Spoulos Edd

Dissertations

Many college campuses are striving to recruit and retain a diverse student population, and one population making its presence known are students with disabilities. As a result of the Rehabilitation Act of 1973 and the Americans with Disabilities Act of 1990, students with disabilities are ensured equal access to education through the removal of architectural barriers and the provision of reasonable accommodations. Despite the existence of these laws, however, many students with attention deficit disorder (ADD) choose not to request classroom accommodations from professors. Students choose not to disclose out of fear of having inaccurate labels placed on them, being …

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Oxidative Stress In Skin Induced By Chemical And Physical Agents, Ashley Rebecca Murray May 2006

Oxidative Stress In Skin Induced By Chemical And Physical Agents, Ashley Rebecca Murray

Graduate Theses, Dissertations, and Problem Reports (ETD)

Free radicals threaten various tissues and are involved in the development and progression of many pathological states and diseases. More than other tissues, the skin is exposed to a variety of chemical, environmental, and physical agents which are capable of inducing radical formation resulting in the development of oxidative stress. The skin possesses an elaborate antioxidant network to deal with reactive oxygen species (ROS); however, excessive exposure and/or radical production can overwhelm the antioxidant capabilities of the skin causing oxidative damage to proteins, DNA, and lipids. The central hypothesis of these studies is that exposure to oxidizible chemicals and/or environmental …

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Intestinal And Systemic Cytotoxic T Lymphocyte And Humoral Immune Responses To Oral And Parenteral Reovirus Infection, Jonathan Reid Fulton May 2006

Intestinal And Systemic Cytotoxic T Lymphocyte And Humoral Immune Responses To Oral And Parenteral Reovirus Infection, Jonathan Reid Fulton

Graduate Theses, Dissertations, and Problem Reports (ETD)

This work was undertaken to determine effects of routes of infection with reovirus induction of responder cytotoxic T lymphocytes (CTL). Further, this work concerns differential effects of age on humoral and CTL responses following oral and parenteral reovirus infection. Despite considerable knowledge about non-intestinal systemic viral immunity, intestinal immune response to viral infection is less understood, and it remains unknown what differences, may occur in CTL populations induced by local viral infections in the intestine or systemic periphery.;We infected mice orally or in hind footpads with reovirus, serotype 1, strain Lang (TIL), and utilized flow cytometry to assess T cell …

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Effects Of Environmental Factors On The Paternal Brood Pouch And Sound Production In Two Sympatric Pipefish Species From The Chincoteague Bay, Virginia, Jennifer L. Ripley May 2006

Effects Of Environmental Factors On The Paternal Brood Pouch And Sound Production In Two Sympatric Pipefish Species From The Chincoteague Bay, Virginia, Jennifer L. Ripley

Graduate Theses, Dissertations, and Problem Reports (ETD)

Pipefishes and seahorses of the family Syngnathidae are important inhabitants of diminishing grass beds threatened by excessive nutrient loads, sedimentation, and chemical contaminants. This research examined the influence of these environmental factors on two sympatric pipefishes from the Chincoteague Bay, Virginia. Syngnathids are characterized by a unique mode of reproduction in which the male carries developing embryos in a placenta-like ventral brood pouch until the fry are free-swimming. Interspecific comparisons revealed differences in parental nutrient allocation to embryos. In Syngnathus fuscus, females produce nutritionally poor eggs and males implant developing embryos adjacent to blood vessels. The loose connection between eggs …

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A Comprehensive Analysis Of The Determinants Of State Medicaid Prescription Drug Expenditures, Sanjoy Roy May 2006

A Comprehensive Analysis Of The Determinants Of State Medicaid Prescription Drug Expenditures, Sanjoy Roy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Prescription drug payments are the fastest growing and most widely varying expenditures across state Medicaid programs. To aid health policy efforts, this study identified determinants of drug utilization and expenditures using Andersen's Behavior Model of Health Services Utilization. A Structure Equation Model was built using five-year data for 48 states, to test relationships among the latent constructs of policy, access, predisposing characteristics, enabling resources, and need for healthcare; and, their influence on drug utilization. Only predisposing characteristics and enabling resources showed significant effects on drug utilization. Cluster Analysis classified state Medicaid programs into eight groups that differ on federal matching, …

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Changes In Integumental Dimensions Of The Face Following Orthodontic Treatment: A Long-Term Study, Jack Hou May 2006

Changes In Integumental Dimensions Of The Face Following Orthodontic Treatment: A Long-Term Study, Jack Hou

Theses and Dissertations (ETD)

Most studies of facial growth in adults have relied on cross-sectional data. Longitudinal studies in this area are scarce because it is difficult to collect data on adults across time and because the changes are less dramatic than during childhood or adolescence. An interesting sample exists in the Charles H. Tweed collection, where orthodontic patients were recalled 10 or more years after treatment with an average time out of treatment of about 15 years. The availability of frontal facial photographs from this collection provided us with an uncommon opportunity to longitudinally quantify the changes in facial dimensions from adolescence into …

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Hand-Wrist Bone Age In Children Treated For Acute Lymphoblastic Leukemia, Mary Elizabeth Martin May 2006

Hand-Wrist Bone Age In Children Treated For Acute Lymphoblastic Leukemia, Mary Elizabeth Martin

Theses and Dissertations (ETD)

Acute Lymphoblastic Leukemia (ALL) is the most common malignancy of childhood, constituting 31 percent of all childhood malignancies. Treatment strategies to target ALL include chemotherapeutic agents, irradiation of the neck and/or spine, and bone marrow transplantation. The aggressive nature of antineoplastic therapies often produces numerous craniofacial and dental sequelae as well as additional harmful effects to the entire body. Cranial irradiation may adversely affect the hypothalamic-pituitary axis decreasing growth hormone production. Consequently, children with ALL may experience a transient or permanent reduction in growth iatrogenically. Hand-wrist radiographs are valuable for evaluating maturational status in children with ALL. These radiographs allow …

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Genetic Networks Modulating Retinal Injury, Felix Vazquez-Chona May 2006

Genetic Networks Modulating Retinal Injury, Felix Vazquez-Chona

Theses and Dissertations (ETD)

Many advances have and are being made with the advent of modern sciences. One area that remains resistant to significant advances is the recovery of the mammalian central nervous system (CNS) after injury. Considerable efforts were placed on understanding the cellular and biochemical changes occurring after injury and during wound healing. Aside from cataloging the changes that occur, little progress is being made in understanding the molecular cascades associated with the control of the healing process. The present series of studies define the global changes that occur after injury. They also define CNS repair mechanisms by identifying genetic networks that …

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Design Of Compact Polymer Mach-Zender Interferometer And Ring Resonator With Air Trench Structures, Seunghyun Kim, Jianhua Jiang, Gregory P. Nordin May 2006

Design Of Compact Polymer Mach-Zender Interferometer And Ring Resonator With Air Trench Structures, Seunghyun Kim, Jianhua Jiang, Gregory P. Nordin

Faculty Publications

We discuss the design of a compact ring resonator (RR) and Mach-Zehnder interferometer (MZI) in a low-refractive-index-contrast waveguide material system through the use of air trenches. A narrow air trench at the intersection of one input and two output waveguides can function as a high-efficiency splitter, while wider air trenches operate as waveguide bends. We first discuss the design of individual splitters and bends and then show how they can be used to realize a compact MZI and RR. The RR has a footprint of only 70 X 100 um, and its optical efficiency at the drop wavelengths is 86%. …

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Dependence Of Craniofacial Growth On Stages Of Cervical Vertebral Maturation And Stages Of Mandibular Canine Mineralization, Charles Allen Chance May 2006

Dependence Of Craniofacial Growth On Stages Of Cervical Vertebral Maturation And Stages Of Mandibular Canine Mineralization, Charles Allen Chance

Theses and Dissertations (ETD)

When an individual presents for orthodontic treatment, orthodontic records are made that also include demographic information. The orthodontic treatment plan is determined not only from the diagnostic records but also from the relative amounts of growth the orthodontist perceives will take place during treatment. The purpose of this study was to determine if pretreatment biological age, as assessed from cervical vertebral (CV) maturity and/or mandibular canine mineralization, are statistically tied to the amount of growth occurring during treatment, and if so, then if biological age has any predictive merit in anticipating the amounts of growth occurring during treatment. The sample …

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Gender Influences In The Graduate Classroom: An Investigation Of Female And Male Student Perceptions, Gerald B. Blanton Edd May 2006

Gender Influences In The Graduate Classroom: An Investigation Of Female And Male Student Perceptions, Gerald B. Blanton Edd

Dissertations

Defined by Mary Rowe (1977) as micro inequities, seemingly insignificant gender bias behaviors create an inequitable academic environment and marginalize groups and individuals in the American classroom. Popularized by Hall and Sandler's 1982 report on the "chilly" classroom, gender bias is subtle and differs from the more obvious behaviors associated with sexual harassment. However, gender bias research appears incomplete. Study findings contradict each other, few studies explore gender bias in the graduate classroom, and fewer yet compare the perceptions of women and men concerning gender influences in the graduate classroom. This dissertation investigates perceptions of the influence of gender in …

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Sensitivity Comparison Evaluation Of Computer-Generated Three Dimensional Surface Topography To Conventional Maxillofacial Radiographic Imagery, Michael A. Hazey Iii May 2006

Sensitivity Comparison Evaluation Of Computer-Generated Three Dimensional Surface Topography To Conventional Maxillofacial Radiographic Imagery, Michael A. Hazey Iii

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objectives. LumenIQ's ImageIQ software enhances conventional radiographs by adding 3-D depth. This study evaluated whether a preference exists for ImageIQ format versus conventional radiographs, determined whether ImageIQ format is as sensitive as 2-D radiographs when detecting existing periodontal defects and simulated periodontal defects. Methods. 34 dental practitioners compared 12 radiographic cases with ImagelQ format. A panel of evaluators classified periodontal defects from 2-D radiographs and ImageIQ images. Simulated periodontal defects were radiographed with various radiographic variables altered, converted to ImageIQ 3-D format, and measured to evaluate the ImageIQ format compared to the 2-D control. Results . ImageIQ format showed improved …

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Spatial Variation In Brook Trout (Salvelinus Fontinalis ) Population Dynamics And Juvenile Recruitment Potential In An Appalachian Watershed, Zachary W. Liller May 2006

Spatial Variation In Brook Trout (Salvelinus Fontinalis ) Population Dynamics And Juvenile Recruitment Potential In An Appalachian Watershed, Zachary W. Liller

Graduate Theses, Dissertations, and Problem Reports (ETD)

I examined the spatial variation in brook trout population dynamics and juvenile recruitment potential in the upper Shavers Fork watershed, West Virginia. The objectives of my research were to (1) identify physico-chemical factors contributing to the spatial variation in the abundance of juvenile brook trout within small basin area stream reaches, (2) quantify patterns of brook trout distribution, movement, and post reproductive demographic parameters across multiple spatial scales, and (3) place the upper Shavers Fork watershed brook trout population along the continuum of watershed-scale metapopulation models. I sampled brook trout population size structure, physical habitat, and water chemistry at the …

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Chemotherapy Disrupts Bone Marrow Stromal Cell Function, Suzanne Davis Clutter May 2006

Chemotherapy Disrupts Bone Marrow Stromal Cell Function, Suzanne Davis Clutter

Graduate Theses, Dissertations, and Problem Reports (ETD)

A variety of bone marrow microenvironment derived signals influence steady state hematopoiesis as well as hematopoietic recovery following bone marrow transplantation. Bone marrow stromal cells found in this unique anatomical niche influence hematopoiesis, in pail, through production of soluble cytokines and chemokines. Developmental signals are also initiated by physical interaction of hematopoietic progenitor cells with stromal cells which are mediated by binding of their integrins to receptors on the stromal cell surface. Finally, the extracellular matrix, including many components produced by stromal cells, provides structure as well as a scaffold on which hematopoietic growth factors can be concentrated and stabilized …

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Evidenced Based Practice Considerations Regarding Rural Health And Access To Care, Amy S. Benjamin May 2006

Evidenced Based Practice Considerations Regarding Rural Health And Access To Care, Amy S. Benjamin

MSN Research Projects

While the United States (U.S.) healthcare system has been extremely successful, concerns remain about access to care for a large segment of the population (Rivers, 2003). Availability o f health care to rural areas is limited, leaving a large portion of the American population with limited access to care. According to the data of the U.S. Census Bureau collected in 2001 27% of the United States population was considered rural. Rural, as defined by the Census Bureau, is a town of less than 2,500 residents’ (Schmidt, 2005). Nurse Practitioners (NPs) can offer increased accessibility to local care by addressing primary …

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The Development Of A Typology For Interracial Relationships, Juan M. D'Brot May 2006

The Development Of A Typology For Interracial Relationships, Juan M. D'Brot

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to determine whether Foeman and Nance's (1999) model of interracial relationship development could be adapted into a generalizable interracial relationship typology and whether there would be distinct differences in the affective, cognitive, and behavioral dimensions of each stage. Long-table analysis of four focus group interviews confirmed differences among the four stages of Foeman and Nance's model. Further examination of focus group transcripts revealed differences between the affective, cognitive, and behavioral dimension of each stage, but few differences between the affective and cognitive dimensions across stages. Implications for the study of relationship development, limitations, and …

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Time-Dependent Semantic Similarity Measure Of Queries Using Historical Click-Through Data, Qiankun Zhao, Steven C. H. Hoi, Tie-Yan Liu, Sourav S. Bhowmick, Michael R. Lyu, Wei-Ying Ma May 2006

Time-Dependent Semantic Similarity Measure Of Queries Using Historical Click-Through Data, Qiankun Zhao, Steven C. H. Hoi, Tie-Yan Liu, Sourav S. Bhowmick, Michael R. Lyu, Wei-Ying Ma

Research Collection School Of Computing and Information Systems

It has become a promising direction to measure similarity of Web search queries by mining the increasing amount of click-through data logged by Web search engines, which record the interactions between users and the search engines. Most existing approaches employ the click-through data for similarity measure of queries with little consideration of the temporal factor, while the click-through data is often dynamic and contains rich temporal information. In this paper we present a new framework of time-dependent query semantic similarity model on exploiting the temporal characteristics of historical click-through data. The intuition is that more accurate semantic similarity values between …

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Biogeochemistry Of Arsenic And Antimony In The North Pacific Ocean, Gregory A. Cutter, Lynda S. Cutter May 2006

Biogeochemistry Of Arsenic And Antimony In The North Pacific Ocean, Gregory A. Cutter, Lynda S. Cutter

OES Faculty Publications

The biogeochemical cycles of the metalloid elements arsenic and antimony were examined along a 15,000 km surface water transect and at 9 vertical profile stations in the western North Pacific Ocean as part of the 2002 IOC Contaminant Baseline Survey. Results show that the speciation of dissolved arsenic (As III, As V, and methylated As) was subtly controlled by the arsenate (AsV)/phosphate ratio. An additional fraction of presumed organic arsenic previously reported in coastal waters was also present (~15% of the total As) in oceanic surface waters. Dissolved inorganic antimony displayed mildly scavenged behavior that was confirmed by correlations with …

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Substituting Otoliths For Chemical Analyses: Does Sagitta = Lapillus?, Nathan G. Smith, Cynthia M. Jones May 2006

Substituting Otoliths For Chemical Analyses: Does Sagitta = Lapillus?, Nathan G. Smith, Cynthia M. Jones

OES Faculty Publications

Chemical analysis of fish otoliths has become an important technique in fisheries science with widespread applications. Most research up to this point has focused predominantly on sagittal otoliths, but the underlying assumptions may also apply to lapilli. The goal of this study was to determine whether lapilli and sagittae have the same otolith chemistry and whether one can be substituted for the other for solution-based chemical analysis in wild-captured fish. We compared the stable isotope chemistry (δ13C and δ18O) of paired sagittae and lapilli of juvenile spotted seatrout Cynoscion nebulosus collected from Chesapeake Bay seagrass beds in 2002. …

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Catalase Activity Mediates The Inhibitory Actions Of 24,25 Dihydroxyvitamin D3, Sven L. Peery May 2006

Catalase Activity Mediates The Inhibitory Actions Of 24,25 Dihydroxyvitamin D3, Sven L. Peery

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The steroid hormone 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] rapidly stimulates the uptake of phosphate in isolated chick intestinal cells, while the steroid 24,25-dihydroxyvitamin D3 [24,25(OH)2D3] inhibits the rapid stimulation by 1,25(OH)2D3. Earlier work in this laboratory has indicated that a cellular binding protein for the 24,25(OH)2D3 is the enzyme catalase. Since binding resulted in decreased catalase activity and increased H2O2 production, studies were undertaken to determine if pro-oxidant conditions mimicked the inhibitory actions of 24,25(OH)2D3, and anti-oxidant conditions …

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