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Synthesis, Characterization, And Applications Of Cvd Micro- And Nanocrystalline Diamond Thin Films, Zhenqing Xu
Synthesis, Characterization, And Applications Of Cvd Micro- And Nanocrystalline Diamond Thin Films, Zhenqing Xu
USF Tampa Graduate Theses and Dissertations
In this thesis, a systematic study has been carried out on the synthesis, characterization and applications of microcrystalline diamond (MCD) and nanocrystalline diamond (NCD) thin films deposited by the chemical vapor deposition (CVD) method. Firstly, an overview of diamond films synthesized from carbon-containing gas plasmas is presented. A parameter study was performed to grow diamond thin films. The transition from micro- to nanocrystallinity of diamond grains was achieved by controlling the Ar/Hydrogen gas ratio. The nanocrystallinity is the result of a new growth mechanism which involves the insertion of carbon dimmer into carbon-carbon and carbon-hydrogen bonds. Secondly, characterization of diamond …
The Conditional Influence Of Criminological Constructs On Juvenile Delinquency: An Examination Of The Moderating Effects Of Self-Control, Angela Yarbrough
The Conditional Influence Of Criminological Constructs On Juvenile Delinquency: An Examination Of The Moderating Effects Of Self-Control, Angela Yarbrough
USF Tampa Graduate Theses and Dissertations
Self-control and various elements comprising this construct have received much credit over the years as it has been able to account for a large amount of variance in delinquency rates. Some research has suggested that individual difference factors (e.g., self-control) can overwhelm external factors (e.g., neighborhoods; see Loeber & Wikström, 2000). Others have found that social influences (e.g., employment; see Wright, et al, 2001) have more pronounced effects for those most at-risk. Because of the equivocal nature of the empirical findings, this study seeks to replicate and extend previous efforts. Specifically, the influence of constructs derived from social learning, control, …
Major Tea Catechin Inhibits Dendritic Cell Maturation In Response To Microbial Stimulation, James L. Rogers
Major Tea Catechin Inhibits Dendritic Cell Maturation In Response To Microbial Stimulation, James L. Rogers
USF Tampa Graduate Theses and Dissertations
Dendritic cells (DCs) are a migratory group of bone-marrow-derived leukocytes specialized for uptake, transport, processing and presentation of antigens to T cells. Exposure of DCs to bacterial pathogens can induce DC maturation characterized by cytokine production, up-regulation of co-stimulatory molecules and an increased ability to activate T cells. DCs have the ability to restrict growth of L. pneumophila (Lp), an intracellular Gram-negative bacillus that causes a severe form of pneumonia known as Legionnaires' disease, in murine ER-derived organelles (121) but replicate in human DCs (145). Even in human cells, however, lysis of the DCs does not occur for at least …
Design Of Surface Acoustic Wave Sensors With Nanomaterial Sensing Layers: Application To Chemical And Biosensing, Subramanian K.R.S Sankaranarayanan
Design Of Surface Acoustic Wave Sensors With Nanomaterial Sensing Layers: Application To Chemical And Biosensing, Subramanian K.R.S Sankaranarayanan
USF Tampa Graduate Theses and Dissertations
Surface acoustic wave (SAW) sensors detect chemical and biological species by monitoring the shifts in frequency of surface acoustic waves generated on piezoelectric substrates. Incorporation of nanomaterials having increased surface area as sensing layer have been effective in improving the sensitivity as well as miniaturization of SAW sensors. Selectivity, sensitivity and speed of response are the three primary aspects for any type of sensor. This dissertation focuses on design and development of SAW devices with novel transducer configurations employing nanomaterial sensing layers for enhanced sensing, improved selectivity, and speed of response. The sensing mechanism in these SAW sensors is a …
The Effect Of Thin-Slicing On Structured Interview Decisions, Gregory F. Schmidt
The Effect Of Thin-Slicing On Structured Interview Decisions, Gregory F. Schmidt
USF Tampa Graduate Theses and Dissertations
This study examined whether hiring recommendations based on thin slices of a structured interview were associated with recommendations based on the interview in its entirety. After viewing 12 seconds of silent interviewee behavior, participants made hiring recommendations that were significantly correlated with those produced by individuals viewing a still-frame of the interview and the entire interview. In an effort to determine what sources of information participants were using to arrive at their recommendations, nonverbal behaviors were examined in detail. Applicants who appeared attentive, not anxious, competent, confident, dominant, optimistic, and professional were more likely to receive positive hiring recommendations than …
Investigation Into Workplace Culture For Medication Error Reporting In Pharmacy, Tamala Lavelle Gulley
Investigation Into Workplace Culture For Medication Error Reporting In Pharmacy, Tamala Lavelle Gulley
USF Tampa Graduate Theses and Dissertations
This study determined impacts on reported medication errors in pharmacy by analyzing the culture in an undisclosed pharmacy in Florida. SPSS Statistical Software was used to determine the relationship between medication errors and workplace culture. Workplace culture was analyzed by distributing a 43-question culture survey to the pharmacists. There were two treatment groups, Control and Intervention, and the culture survey was two-fold, pre-survey and post-survey, utilizing identical questions to note the difference in a comparative analysis. During the pre-survey, the pharmacists in the Intervention Group received an informational sheet which contained information on a non-punitive culture as well as information …
What Are The Socio-Emotional Experiences And Perceptions Of Third Grade Students With High-Stakes Testing?, Anne Marie Juola-Rushton
What Are The Socio-Emotional Experiences And Perceptions Of Third Grade Students With High-Stakes Testing?, Anne Marie Juola-Rushton
USF Tampa Graduate Theses and Dissertations
The purpose of this study was to explore the experiences and perceptions of third grade students with high-stakes testing. The study was designed to address this issue from the perspective of the third grade student's experience and offer a venue for them to share their stories. The following research question guides this study: What are the socio-emotional experiences and perceptions of third grade students with high-stakes testing? Data analysis employed here falls under the rubric of qualitative approaches of symbolic interaction and phenomenology written in a narrative format with the provisions of portraiture. This study uses the analytical procedures set …
School Psychologists’ Provision Of School-Based Mental Health Interventions: A Qualitative Study Of Perceived Barriers, Allison A. Friedrich
School Psychologists’ Provision Of School-Based Mental Health Interventions: A Qualitative Study Of Perceived Barriers, Allison A. Friedrich
USF Tampa Graduate Theses and Dissertations
The primary purpose of this study was to elucidate factors that school psychologists perceive inhibit them from providing more mental health interventions within their professional roles. School psychologists' dual training in mental health and education renders them the logical choice to provide tier II and tier III interventions in schools (National Association of School Psychologists [NASP], 2003). School psychologists appear to be in agreement, as they indicate a desire to spend more time in the provision of roles such as counseling and consultation (e.g., Prout, Alexander, Fletcher, Memis, & Miller, 1993). However, school psychologists currently spend relatively little time in …
Regulation Of Foxo Stability And Activity By Mdm2 E3 Ligase, Wei Fu
Regulation Of Foxo Stability And Activity By Mdm2 E3 Ligase, Wei Fu
USF Tampa Graduate Theses and Dissertations
Members of the forkhead class O (FOXO) transcription factors are tumor suppressors and key molecules that control aging and lifespan. The stability of mammalian FOXO proteins is controlled by proteasome-mediated degradation but general ubiquitin E3 ligases for FOXO factors remain to be defined. The current studies demonstrate that MDM2 bound to FOXO1 and FOXO3A and promoted their ubiquitination and subsequent degradation, a process apparently dependent on FOXO phopshorylation at PKB sites and on the E3 ligase activity of MDM2. The binding occurred between endogenous proteins and was involved the forkhead box of FOXO1 and the region of MDM2 that controls …
Analysis Of E2f1 Target Genes Involved In Cell Cycle And Apoptosis, Scott N. Freeman
Analysis Of E2f1 Target Genes Involved In Cell Cycle And Apoptosis, Scott N. Freeman
USF Tampa Graduate Theses and Dissertations
One of the main results of Rb-E2F pathway disruption is deregulation of the E2F family of transcription factors, which can lead to inappropriate proliferation, oncogenic transformation, or the induction of apoptosis. Given the potential negative biological effects associated with deregulated E2F activity, it is of great importance to study E2F targets that mediate these effects. In Part I of this manuscript, we identify the RhoBTB2 putative tumor suppressor gene as a direct physiological target of the E2F1 transcription factor. We find that RhoBTB2 is highly upregulated during mitosis due in part to E2F1, and that overexpression of RhoBTB2 increases the …
Relationship Between Biofilm Removal And Membrane Performance Using Dunedin Reverse Osmosis Water Treatment Plant As A Case Study, Joshua E. Goldman
Relationship Between Biofilm Removal And Membrane Performance Using Dunedin Reverse Osmosis Water Treatment Plant As A Case Study, Joshua E. Goldman
USF Tampa Graduate Theses and Dissertations
Membrane biofouling is a common occurrence in water treatment plants that utilize reverse osmosis (RO). As bacteria and biofilm material build up on the membrane surface, it becomes more difficult for clean water to permeate through the membrane, and more pressure is required to produce the same amount of water. When pressures become critically high, membranes must be cleaned. This process is expensive in terms of chemical cost, labor, and downtime. Even after membranes have been cleaned, they can re-foul quickly if the cleaning did not effectively remove the biofilm. The water treatment plant in Dunedin, FL, which uses RO …
The Role Of Poly (Adp-Ribose) Polymerase-1 Inhibitors: Prevention Of Non Glutathione-Dependent Carbon Tetrachloride-Induced Hepatotoxic, Paul Christopher Grivas
The Role Of Poly (Adp-Ribose) Polymerase-1 Inhibitors: Prevention Of Non Glutathione-Dependent Carbon Tetrachloride-Induced Hepatotoxic, Paul Christopher Grivas
USF Tampa Graduate Theses and Dissertations
Carbon tetrachloride (CCl4) is a hepatotoxicant known to elevate alanine aminotransferase (ALT) and other liver enzyme levels, and cause lipid peroxidation, as well as centrilobular necrosis. A number of poly ADP-ribose polymerase (PARP) inhibitors were administered via intraperitoneal (i.p.) injections to male ICR mice as cotreatments at various time intervals relative to the CCl4. Aminophylline, a water soluble complex consisting of two molecules of theophylline bridged by ethylene diamine, was administered one-half hour, one hour and two hours after CCl4. The levels of ALT in the serum, as well as malondialdehyde and its equivalent markers of oxidative damage in the …
Johnson’S System Of Distributions And Microarray Data Analysis, Florence George
Johnson’S System Of Distributions And Microarray Data Analysis, Florence George
USF Tampa Graduate Theses and Dissertations
Microarray technology permit us to study the expression levels of thousands of genes simultaneously. The technique has a wide range of applications including identification of genes that change their expression in cells due to disease or drug stimuli. The dissertation is addressing statistical methods for the selection of differentially expressed genes in two experimental conditions. We propose two different methods for the selection of differentially expressed genes. The first method is a classical approach, where we consider a common distribution for the summary measure of equally expressed genes. To estimate this common distribution, the Johnson system of distribution is used. …
Transport Characteristics Using Nor- Dihydroguaiaretic Acid (Ndga)- Polymerized Collagen Fibers As A Local Drug Delivery System, Eric Guegan
USF Tampa Graduate Theses and Dissertations
Dexamethasone and dexamethasone 21-phosphate were loaded into NDGA-polymerized collagen fibers and release rate studies were performed to calculate their diffusion coefficients. Dexamethasone loaded fibers were placed in a PBS solution for specified time intervals (1, 3, 6, 7, 12, 24, 30, and 48 hours) after which the eluant was removed and analyzed by capillary zone electrophoresis (CZE). CZE is a tool that can be utilized for quantitative analysis of chemical compounds. This data was incorporated into mathematical models to determine the diffusion coefficient. The diffusion coefficient (D) for dexamethasone in NDGA-polymerized collagen fibers is D = 1.86 x 10-14 …
Long-Term Effects Of Prescribed Fire On Reptile And Amphibian Communities In Florida Sandhill, Neal Thomas Halstead
Long-Term Effects Of Prescribed Fire On Reptile And Amphibian Communities In Florida Sandhill, Neal Thomas Halstead
USF Tampa Graduate Theses and Dissertations
I examined the effects of fire frequency on reptile and amphibian community composition in a periodically burned sandhill habitat in west-central Florida. Plots burned in 2003 had lower species richness, diversity, and evenness indices than plots that had not been burned during the previous six years. Community composition was different among plots burned at different times and followed a gradient of change that corresponded to the time since the last fire. Aspidoscelis sexlineata were the most abundant lizards in recently burned plots, while Scincella lateralis and Plestiodon inexpectatus were relatively more abundant in unburned plots. Gopherus polyphemus were least abundant …
Nanoripples Formation In Calcite And Indium Phosphide (Inp) Single Crystals, Ramakrishna Gunda
Nanoripples Formation In Calcite And Indium Phosphide (Inp) Single Crystals, Ramakrishna Gunda
USF Tampa Graduate Theses and Dissertations
In this project we studied the formation of nanoripples in calcite and InP single crystals by continuous scanning using the nanoindenter in the ambient environment and by Argon ion irradiation under ultra high vacuum conditions, respectively. Formation of tip induced nanowear ripples is studied on a freshly cleaved calcite single crystal as a function of scanning frequency and contact load of the diamond tip. At lower loads, initiation of the ripples takes place at the bottom of the surface slope at 3 Hz scanning frequency, which continue to propagate as scanning progresses. The orientation of these ripple structures is perpendicular …
Examining The Evolution Of Phosphagen Kinases: A Study Of A Dimeric Arginine Kinase From Sea Urchin (Strongylocentrotus Purpuratus) Eggs, Brenda Christine Held
Examining The Evolution Of Phosphagen Kinases: A Study Of A Dimeric Arginine Kinase From Sea Urchin (Strongylocentrotus Purpuratus) Eggs, Brenda Christine Held
USF Tampa Graduate Theses and Dissertations
The phosphagen kinases are a family of enzymes that catalyze the reversible phosphorylation of specific phosphagens using ATP as the phosphate donor. The evolutionary relationships between the enzymes in this family have been studied for over 30 years and yet aspects of the relationships remain unclear. Here, arginine kinase from Strongylocentrotus purpuratus eggs was purified to homogeneity and analyzed for physical and kinetic characteristics as well as its sequence homology with other phosphagen kinases. The results indicate that dimeric arginine kinase from S. purpuratus eggs evolved from a dimeric creatine kinase after dimeric creatine kinase evolved from a monomeric arginine …
Development Of Biocompatible Multi-Drug Conjugated Nanoparticles/Smart Polymer Films For Biomedicinal Applications, Kerriann R. Greenhalgh
Development Of Biocompatible Multi-Drug Conjugated Nanoparticles/Smart Polymer Films For Biomedicinal Applications, Kerriann R. Greenhalgh
USF Tampa Graduate Theses and Dissertations
It has been reported by the American Burn Association that 4,000 people die every year due to burn injury. After survival of the initial trauma, the next major obstacle that must be overcome is combating bacterial infection, the primary cause of mortality for burn victims (Chapter 1). The polyacrylate nanoparticle drug delivery system was created to provide a water-based solution for delivery of highly lipophilic antimicrobials; such as N-thiolated β-lactams, however, with the success of this system for these antimicrobials, it was extended towards other, commercially-available water-soluble antimicrobials through acrylation of the drug monomers, including those with observed bacterial resistance …
A Gis-Based Inventory Of Terrestrial Caves In West-Central Florida: Implications On Sensitivity, Disturbance, Ownership, And Management Priority A Gis-Based Inventory Of Terrestrial Caves In West-Central Florida: Implications On Sensitivity, Disturbance, Ownership, And Management Priority, Grant L. Harley
USF Tampa Graduate Theses and Dissertations
Active cave management, which represents any continuous action to conserve, restore, or protect a cave environment, is virtually non-existent in west-central Florida. This study focuses on developing an inventory to rank terrestrial caves in west-central Florida by management priority. A GIS-based cave inventory system, including a cave sensitivity index and cave disturbance index, were used as a tool to gain an understanding of the management priority of west-central Florida caves. The inventory was applied to 36 terrestrial caves in west-central Florida, which demonstrated a wide range of sensitivity and disturbance. The results show that by relying solely on sensitivity and …
Modeling Larval Connectivity Among Coral Habitats, Acropora Palmata Populations, And Marine Protected Areas In The Florida Keys National Marine Sanctuary, Christopher John Higham
Modeling Larval Connectivity Among Coral Habitats, Acropora Palmata Populations, And Marine Protected Areas In The Florida Keys National Marine Sanctuary, Christopher John Higham
USF Tampa Graduate Theses and Dissertations
The Florida Keys National Marine Sanctuary (FKNMS) encompasses North America's only living coral barrier reef and the third longest barrier reef in the world, making it a unique national treasure of international notoriety (FKNMS, 2005). Recent evidence of environmental decline within the sanctuary has created a sense of urgency to understand and protect the valuable resources within. This thesis contributed to the understanding of habitat connectivity to aid managers and decision makers in the creation of additional Marine Protected Areas (MPAs) in the FKNMS to help prevent further environmental decline. This research specifically focused on modeling larval transport and larval …
The Pedagogy And Politics Of Online Education In Anthropology, Linda J. Hose
The Pedagogy And Politics Of Online Education In Anthropology, Linda J. Hose
USF Tampa Graduate Theses and Dissertations
This dissertation reports on the key findings of an exploratory study of online education in anthropology. The study was designed to collect information on the extent and types of online offerings at four-year and above degree-granting public institutions in the US. It was also designed to report on the teaching strategies and methods that anthropologists employ online, and to inquire into the conditions and institutional structures that encourage or discourage the development of online education in anthropology. Recent growth in online education has been explosive in many disciplines, but little is known about anthropology's participation in the trend, or lack …
Attitudinal Factors Related To Driving Behaviors Of Young Adults In Belize: An Application Of The Precaution Adoption Process Model, Ismael A. Hoare
Attitudinal Factors Related To Driving Behaviors Of Young Adults In Belize: An Application Of The Precaution Adoption Process Model, Ismael A. Hoare
USF Tampa Graduate Theses and Dissertations
Young adults' risk-taking attitudes, risk perception, and knowledge of road laws and signs influence their driving behaviors. The adoption of risky driving behaviors increases young adults' risk of motor vehicle crashes. The purpose of this study was to increase the understanding of the factors that lead to increased risks of MVC-related mortality and morbidity for young adults in Belize, to provide support for the development of evidence-based programs, and, more importantly, to investigate the relationships involving young adults' risk-taking attitudes, risk perception, and knowledge of road laws and signs and their relation to driving behaviors. The Precaution Adoption Process Model …
Antibody Targeting Of Non Ionic Surfactant Vesicles To Vascular Inflammation, Elizabeth D. Hood
Antibody Targeting Of Non Ionic Surfactant Vesicles To Vascular Inflammation, Elizabeth D. Hood
USF Tampa Graduate Theses and Dissertations
Cardiovascular disease (CVD) and particularly atherosclerosis is a leading cause of morbidity in the developed world. Atherosclerosis and the rupture of vulnerable atherosclerotic plaque cause 70% of deaths from CVD. The progression of atherosclerosis has been identified as a pathological inflammatory process. Targeting atherosclerotic drug therapies to inflammatory markers has emerged as an important and growing research area. The adhesion molecule CD44 has been implicated in the onset and build-up of atherosclerotic lesions throughout the course of development. The research in this dissertation is aimed at targeting anti-inflammatory therapy to activated vascular endothelium with directed with an anti-CD44 antibody, IM7, …
(Dis)Continuity Between Sikhism And Islam: The Development Of Hukam Across Religions, Mark Horowitz
(Dis)Continuity Between Sikhism And Islam: The Development Of Hukam Across Religions, Mark Horowitz
USF Tampa Graduate Theses and Dissertations
The purpose of this study is to analyze the development of the Sikh concept of hukam, which is usually translated as a divine command or order. The concept is prominently featured in the Sikh sacred scripture (Guru Granth) and is an important aspect of daily ritual life for the Sikhs. The goal of this study is to provide initial insight into how the concept developed in the Sikh scriptural tradition, as well as the implications that the concept had for the Sikh community. This paper traces the development of hukam from the concepts origin in the Islamic tradition, the writings …
My Lord Lackbeard: Enfranchisement And Expressions Of Beardlessness In Shakespeare’S Canon From 1594 To 1601, C R. Junkins
My Lord Lackbeard: Enfranchisement And Expressions Of Beardlessness In Shakespeare’S Canon From 1594 To 1601, C R. Junkins
USF Tampa Graduate Theses and Dissertations
William Shakespeare employs a series of male characters specifically described as beardless in those plays performed from 1594 to 1601. Will Fisher argues that such characters reveal early modern conceptions of masculinity; the beard was used in conjunction with other forms of material such as dress and weaponry to construct gender. Mark Albert Johnston notes that beards performed as currencies of exchange, denoting not just masculinity but economic power as well. Rather than signifying a lack or deficiency, the hairless chin is an active participant in a deeply complex tangle of competing political, economic and religious ideologies. Shakespeare's commentary on …
The Relationship Between Technology Integration And Achievement Using Multi-Level Modeling, Tina N. Hohlfeld
The Relationship Between Technology Integration And Achievement Using Multi-Level Modeling, Tina N. Hohlfeld
USF Tampa Graduate Theses and Dissertations
The purpose of this longitudinal study was to examine the relationship between technology integration indicators and school level achievement. Four years of school level secondary data from publicly available databases maintained by the Florida Department of Education were combined for all public elementary, middle, and high schools in the state. This study examined approximately 2300 schools that participated each year in the Florida Innovates Survey about technology integration between 2003-04 and 2006-07. Complexity theory supported the use of multi-level modeling to examine the relationships between technology integration and outcomes. Three achievement outcomes (reading, mathematics, and writing) and two mediating behavioral …
Optimization Of Anti-Abeta Antibody Therapy, Rachel Anne Karlnoski
Optimization Of Anti-Abeta Antibody Therapy, Rachel Anne Karlnoski
USF Tampa Graduate Theses and Dissertations
Alzheimer's disease (AD) is the most common form of dementia, a disease that gradually destroys brain cells and leads to progressive decline in mental function. The presence of high densities of neuritic plaques composed of Abeta in the cerebral cortices is a criterion for the post-mortem diagnosis of AD. The view that Abeta deposition drives the pathogenesis of AD (amyloid hypothesis) has received support from a wide range of molecular, genetic, and animal studies. This hypothesis has been the focus of therapeutic intervention leading to the development of anti-Abeta immunotherapy as a potential treatment. There is a great deal of …
The Gothic As Counter-Discourse: Mark Twain, Charles Chesnutt And Toni Morrison, Hyejin, Kim
The Gothic As Counter-Discourse: Mark Twain, Charles Chesnutt And Toni Morrison, Hyejin, Kim
USF Tampa Graduate Theses and Dissertations
Revisiting the American Gothic via Julia Kristeva's theory of "the abject" demonstrates how Gothic strategies expose the historical contradictions of race in works by Mark Twain, Charles W. Chesnutt, and Toni Morrison. As theorized by Kristeva in Powers of Horror, the archaic process in which the subject attempts to constitute itself as homogeneous by casting off or "abjecting" all that cannot be assimilated to the self-same necessarily opens the way to repeated returns of the abject(ed) and the "horror" it provokes. Because the Gothic enacts the return of the abject, it was itself abjected from the literary canon until recently. …
Natural And Anthropogenic Influences On Flow Patterns And Sediment Characteristics In The Dona And Roberts Bay Estuarine System, Sarasota County, Florida, Kyle W. Kelso
USF Tampa Graduate Theses and Dissertations
The Dona and Roberts Bay watershed comprises one of the five major watersheds in Sarasota County, Florida. It is connected to the Gulf of Mexico via Venice Inlet. Like many estuaries in the Florida, significant modifications have been made to the drainage basins, principally to the main tributaries. The system has undergone several anthropogenic modifications to enhance water management efforts. Creeks that comprise fresh water input into the system have been dammed in order to inhibit the upstream flow of salt water during the dry season. They are also deepened or lengthened to allow for better drainage. In addition, biogenic …
Crystallization Studies Of Epigallocatechin Gallate, Sheshanka Kesani
Crystallization Studies Of Epigallocatechin Gallate, Sheshanka Kesani
USF Tampa Graduate Theses and Dissertations
Flavonoids are a long and well known class of natural products. Their potential health benefits can be attributed to their antioxidant activity, and modulation of cell signaling pathways. Green tea one of the most widely consumed beverages, consist of flavonoids such as catechins and tannins. Epigallocatechin gallate (EGCG) the major catechin of green tea exhibits multiple health benefits due to its antioxidant nature. The radical scavenging activity of EGCG is attributed to its structure. Therefore, a study on molecular features of EGCG would provide valuable information on structural modifications, which may change the physiochemical properties such as bioavailability and solubility. …