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Tunneling Spectroscopy Study Of Calcium Ruthenate, Anthony Bautista

University of Kentucky Doctoral Dissertations

The ruthenates are perhaps one of the most diverse group of materials known up to date. These compounds exhibit a wide array of behaviors ranging from the exotic pwave superconductivity in Sr₂RuO₄, to the itinerant ferromagnetism in SrRuO₃, and the Mott-insulating behavior in Ca₂RuO₄. One of the most intriguing compounds belonging to this group is Ca₃Ru₂O₇ which is known to undergo an antiferromagnetic ordering at 56K and an insulating transition at 48K. Most intriguing, however, is the behavior displayed by this compound in the presence …

Integration Of The Regression-Based Land Use Model And The Combined Trip Distribution-Assignment Transportation Model, Meiwu An

University of Kentucky Doctoral Dissertations

Regional growth caused the emergence of traffic congestion and pollution in the past few decades, which have started to affect small urban areas. These problems are not only related to transportation system design but also to land use planning. There has been growing recognition that the relationship between land use and transportation needs to be understood and analyzed in a consistent and systematic way. Integrated urban models have recently been introduced and implemented in several metropolitan areas to systematically examine the relationship between land use and transportation. The general consensus in the field of integrated urban models is that each …

The Experiences Of Counseling Victims Of Trauma As Perceived By Master's Level Post-Practicum Students, Elizabeth More Ventura

Electronic Theses and Dissertations

The purpose of this study was to examine the lived experiences of master's level post-practicum students as they encountered trauma-related cases during their practicum experience. This qualitative, phenomenologically oriented study used Van Manen's (1990) four lived existentials, Bronfenbrenner's (1979) bio-ecological model of human development, and existing traumatology literature as its theoretical underpinnings. There is no existing literature that examines the experiences of beginning counselors as they encounter trauma-related cases in their academic training programs. The literature base surrounding traumatology is quickly expanding due to the increased awareness and prevalence of trauma in our culture. As the demand for services related …

Children With Mental Retardation / Intellectual Disability: The Function Of Adaptive Behavior And Parental Stress Across Childhood, Wendy Westwood

Electronic Theses and Dissertations

Numerous studies have investigated the relationship between child functioning, problematic child behaviors, and parental stress. However, previous research has not fully examined variables of parental stress across adaptive behavior and the lifespan span of a child with MR/ID. The present study investigated parental stress differences among children's adaptive behavior and childhood life stages, according to the family life cycle theory. Stress was examined in parents of a child with a disability whose age fell in the life cycle stages of preschool, school age, or adolescence. Results indicated that parents of preschool and school age children with disabilities (M =31.17, SD …

Basic Knowledge In Critical Care: A Comparison Of Experienced And Newly Graduated Nurses Augmented With An Examination Of Newly Graduated Nurses' Experiences Making Clinical Judgments, Lynn Wiles

Electronic Theses and Dissertations

Newly graduated nurses (NGNs) are thrust into roles that some purport they are inadequately prepared to handle. Studies found that 4% of NGNs were comfortable with their skills, it took up to one year to feel competent and confident, and NGNs feel shocked, unprepared, and overwhelmed.

The purpose of this mixed method study was to investigate the basic knowledge (BK) of NGNs working in the critical care (CC) setting and compare it to the BK of experienced nurses and to understand the experience of NGNs as they made clinical judgments. Triangulation linked the experiences of NGNs as they made clinical …

Sex, Entrepreneurship, And Benefits: The Role Of Small Business Owners In Promoting Gender Equity In The Workplace Through Benefits Offerings, Iris Winter

Electronic Theses and Dissertations

The purpose of this study is to ascertain whether the sex of a business owner influences the benefits offered by a given business. Specifically, are female-owned businesses more likely than male-owned firms to have family-friendly employment benefits in place? My hypothesis is that there is a relationship between the sex of a business owner and the benefits that are available and offered to the employees of that firm. I use a sample drawn from the Kauffman Firm Survey Third Follow-Up that includes independently-started businesses with 5-29 employees and 1-2 owners that have been in business for 4 years. I analyze …

Community Partner Perspectives Of Community-University Partnerships That Support Service Learning, Anne Marie Witchger Hansen

Electronic Theses and Dissertations

Community partner voices are important to understand because they provide the contexts in which occupational therapy students meet course objectives by applying clinical reasoning theory and developing clinical reasoning skills in a natural context (Witchger-Hansen et al., 2007; Provident, et al., 2011). To sustain these community-university partnerships, faculty must understand how community partners are experiencing these partnerships. This understanding provides the faculty with insight on how to adjust, revise or enhance the partnership process that supports the service-learning pedagogy to sustain this community work of meeting community-identified needs while providing students with an opportunity to apply theory and develop clinical …

Ecological Method Development For Detecting N-Nitrosodimethylamine In Water Using Hplc-Pdad, Jolisa Mcday

Master's Theses and Doctoral Dissertations

Using ethanol, a sustainable reversed-phase high-performance liquid chromatographic method with photo-diode array detection (HPLC-PDAD) was investigated to detect sub-parts per billion concentrations of N-nitrosodimethylamine (NDMA) in drinking water and environmental water samples. This presents a practical and “green” option to analytical methods that require laborious derivatization, expensive detectors and unecological solvents.

Mobile phase characteristics, instrument operating parameters, and sample preparation were investigated. Selectivity for NDMA was evaluated using three different C18 columns. Optimal peak resolution and detection were achieved at 231 nm. The limit of detection and quantitation for NDMA was 0.29 μg/mL and 0.96 μg/mL, respectively, with an ethanol …

Fruit And Vegetable Consumption In Four Elementary Schools After Implementation Of Nutrition Education Programs, Lori Nelson

Master's Theses and Doctoral Dissertations

Nutrition education programs in schools often promote fruits and vegetables with the goal of increasing consumption among children. This study determined whether nutrition education programs increased fruit and vegetable intake in four elementary schools in Florida from October 2008 to October 2009. School A offered the U.S.D.A. Fresh Fruit & Vegetable Program; School B had a Student Wellness Advisory Council, OrganWise Guys and CATCH; School C had OrganWise Guys and CATCH; School D had no nutrition education programs. Students’ favorite fruits and vegetables at breakfast and lunch were compiled. An increase in fruit intake was observed in three out of …

Quantification Of Short-Chain Fatty Acids In Cecal Material By Gas Chromatography-Mass Spectrometry, Charles Harrison

Master's Theses and Doctoral Dissertations

Probiotic bacteria in the human colon that produce C₂ – C₄ short chain fatty acids (SCFA) and Lactobacillus species that produce lactate in addition to SCFAs are known to have positive health benefits. These organic acids were extracted with ether from murine cecal material (from Dr. Gary Huffnagle, Univ. of Mich.) and derivatized for quantitative measurement by gas chromatography-mass spectrometry. Antibiotic-treated animals gavaged with Candidaalbicans had a lower level of cecal butyrate relative to untreated animals, but a higher level of butyrate when treated mice were also administered Lactobacillus johnsonii NF-1. More recent studies have demonstrated a butyrate-lowering …

Relationships Between Binge Eating, Psychological And Behavioral Covariates, And Health Care Utilization On College Campuses: Results From A National Sample Of College Students, Summar Reslan

Master's Theses and Doctoral Dissertations

The purpose of this investigation was to examine the factors which moderate service utilization among college students, as well as risk factors for binge eating disorder (BED). Candidate moderators included binge eating, obesity, gender, ethnicity, psychological comorbidity, body image, and emotional dysregulation. Data from the Healthy Minds Study (HMS) 2010 were utilized. Two samples of participants were analyzed: the full HMS 2010 national sample of undergraduate college students (N = 17,995) and a subsample of undergraduate students (N = 969) from Eastern Michigan University (EMU) who participated in the HMS. Results suggested that psychological comorbidity significantly impacted psychological service utilization …

Typically Developing Children’S Attitudes And Acceptance Of Children With Autism Spectrum Disorder After Integrated Play Group Involvement, Karen Kay Toon

Master's Theses and Doctoral Dissertations

In an urban, midwestern public school, six children, ages 8-10 years old, engaged in ten weeks of Integrated Play Groups (IPGs) to teach skills to students with autism spectrum disorder (ASD). Lasting two and a half months, IPGs met for 30 minutes, twice weekly. The participants engaged in pre- and post-tests of the revised Chedoke-McMaster Attitudes Towards Children with Handicaps scale and pre- and post-focus groups. These means were used to investigate the research question: What can be learned about typical peers’ attitudes and acceptance of students with ASD through the expert players’ reflections on Integrated Play Group involvement? The …

Influence Of The Reducing Agent Triphenylphosphine On Cyclooxygenase-1 Metabolism Of Arachidonic Acid, Rohini Sidhu

Master's Theses and Doctoral Dissertations

Cyclooxygenase (COX) metabolizes the polyunsaturated fatty acid arachidonic acid (AA) to PGG2, a cyclic endoperoxide that also contains a hydroperoxide, which is subsequently reduced to an alcohol in the enzyme to yield PGH2. Reactions catalyzed by COX-1 are significantly influenced by lipid hydroperoxides. The tyrosyl radical that abstracts the 13 pro(s) hydrogen from AA to initiate the COX catalytic cycle is generated by iron-oxo derivatives in the enzyme that result from lipid hydroperoxide interaction with heme iron. Commercial preparations of arachidonic acid (AA) contain lipid hydroperoxides that can be separated from AA by thin layer chromatography and readily reduced to …

The King At Kaamelott, Ahmed S. Bashi

Master's Theses and Doctoral Dissertations

French TV‘s M6 aired a ground-breaking television advance, known as Kaamelott, from 2005 to 2009, derived from a long tradition of Arthurian narrative form and a long tradition of that form‘s modernization. Spanning the split, therefore, between the Modern and the Medieval, Alexandre Astier‘s experimental Adventure-Comedy, adapting no single model, this Frankenstein, brought to life through canny theatrical bricolage, provokes the following concrete question: how have the dimensions of the exemplary human life of the King been updated by this installment of an eight centuries (and more) old tradition? Using the frame-work of Berne‘s Games People Play, …

The Inflammatory Response To Acute Maximal Sprint Exercise, Timothy A. Muth

Master's Theses and Doctoral Dissertations

The purpose of this study was to determine whether acute maximal sprint exercise would elicit an inflammatory response in trained and untrained runners marked by increased systemic immune proteins and byproducts of oxidation, as well as to determine a time course for the presence of these markers. In procedures approved by the Eastern Michigan University College of Health and Human Services Human Subjects Review Board, subjects participated in a total of five study visits consisting of both exercise and blood draws. Blood analysis seems to indicate that there was a secondary tissue injury, which was responsible for the greatest changes …

Graduate Speech-Language Pathology Students' Reactions To The Transition From Academic To Clinical Coursework, Amanda Schramski

Master's Theses and Doctoral Dissertations

This qualitative research study investigated the transition between academic and clinical coursework during the graduate education of speech-language pathologists (SLPs). During this transition period, graduate students experience stress and anxiety (Chan, et al., 1994; Lincoln, et al., 2004). This study examined what aspects of the transition are responsible for these feelings. Through interviews with graduate students who recently experienced this transition, data was collected to make sense of the feelings and experiences that the graduate students endured and what aspects of the transition were responsible for their cause. The results of this study revealed multiple factors that increased anxiety before …

Effects Of Silver Nanoparticles On Photochemical Processes Focusing On Luminol Chemiluminescence, Scott Milam

Master's Theses and Doctoral Dissertations

Silver nanoparticles of varying sizes were synthesized. Their effects on enhancing or quenching the photochemical processes of tryptophan fluorescence, a ruthenium complex decay constant and chemiluminescence of luminol and ferricyanide, were studied. The tryptophan fluorescence was slightly enhanced by smaller nanoparticles and showed slight quenching in the presence of larger nanoparticles. The tris (2,2’-bipyridyl ruthenium (II) chloride) complex was excited using a 532 nm laser, and the decay constant was measured. Neither gold nor silver nanoparticles showed an impact on this process. The luminol chemiluminescence was studied with an emphasis on holding the concentration of nanoparticles, surface area, and silver …

Analysis Of The Effect Of Various Ligands On The Hydrolysis Of Ruthenium (Iii) Complexes And Interpretation Of Kinetics Of Hydrolysis Profiles By Uv-Visible Spectrophotometry, Sudheer Koneru

Master's Theses and Doctoral Dissertations

Cancer is one of the major causes of death in the world. Discovery of platinum metal-based drugs like cisplatin and carboplatin have proved to be successful in cancer treatment. Due to subsequent development of resistance, side effects, and fewer toxic effects of these drugs, the usage of these drugs has been limited. Novel drugs were being synthesized utilizing the transition metals like ruthenium, osmium, and copper.

In this research, ruthenium metal complexes of the formula HL[RuCl4L2] (where L= ligand) were synthesized. These ruthenium-based drugs exist in prodrug forms which are activated into antitumor drugs by means of hydrolysis, redox reactions, …

Exploration Of Trpv1 Splice Variant Expression In Rat Dorsal Root Ganglia Following Sciatic Nerve Injury, Karl A. Andersen

Electronic Theses and Dissertations

Transient Receptor Potential Vanilloid 1 (TRPV1) is ligand-gated ion channel that plays an important role in the pain signaling pathway. It is predominantly expressed by sensory neurons located in trigeminal ganglia or dorsal root ganglia (DRG). TRPV1 has been shown to play a crucial role in the generation and maintenance of inflammatory and neuropathic pain. The involvement of splice variants of TRPV1 in pain pathways is not well known. In this study, the mRNA expression of TRPV1 and 3 splice variants (TRPV1.b, TRPV1.β, and TRPV1.var) in DRG was measured following chronic constriction injury of the sciatic nerve in rats. This …

Characterization Of The Binders In The Rock Art Of Cueva La Conga, Nicaragua, Ran Li

Master's Theses and Doctoral Dissertations

Cueva La Conga is the only known painted cave in Nicaragua, in a part of that country about which little is known archaeologically. The rock art, which includes carved rock formations as well as paintings and handprints, may provide clues about the past people and culture of this area. Archaeologists want to know if the paintings were influenced by the Maya to the north, or the Caribbean cultures to the east, or were a purely indigenous development. Determining the age of the paintings will help to understand the possible cultural relationships between known cultures and the rock art of Cueva …

Influence Of Metal Nanoparticles On Fluorescence Properties, Vamsi K. Kandimalla

Master's Theses and Doctoral Dissertations

In this project, we studied the effect of silver and gold nanoparticles of various sizes on the fluorescence properties of tris (2, 2-bipyridyl) dichloro ruthenium (II) hexahydrate (Ru (bpy)3 2+), tryptophan and phenylalanine. For (Ru (bpy)3 2+) absorbed on silver and gold nanoparticles, the fluorescence intensity was quenched and showed a significant increase in the fluorescence lifetimes. These quenched intensities were due to energy transfer processes from the donor (Ru (bpy)3 2+) to the metal nanoparticles. Conversely, tryptophan showed enhanced fluorescence intensities with an increase in the size of the nanoparticles, which may be attributed to the effect of fluorescence …

Inclusive Education Training: Steps To Prosperity, Saima Khalid

Institute for Educational Development, Karachi

No abstract provided.

Multimodal Structure Of Baroclinic Tides In The South China Sea, V. Vlasenko, N. Stashchuk, C. Guo, X. Chen

School of Biological and Marine Sciences

The modelling of baroclinic tides generated in the northern South China Sea is studied using a fully-nonlinear non-hydrostatic numerical model. The focus of the modelling efforts was on the vertical structure of internal waves in the vicinity of the Luzon Strait. The barotropic tidal flow interacting with a two-ridge bottom topography in the area of the Luzon Strait produces a complex baroclinic tidal signal. A multimodal baroclinic bore with counter-phase displacement of isopycnals generated over the ridges and propagating westward disintegrates into a series of large-amplitude solitary internal waves. The leading first-mode solitary wave of depression is followed by a …

Electrodeposition Of Tin Using Tin (Ii) Methanesulfonate From Mixture Of Ionic Liquid And Methane Sulfonic Acid., Yang Kok Kee

Student Works (2010-2019)

The electrodeposition of tin from Tin(II) Methane Sulfonate (MSA) with varying concentration in air and water stable 1-butyl-1-methyl-pyrrolidinium trifluoromethanesulfonate, (BMPOTF) ionic liquid at room temperature was studied. Cyclic Voltammetry served to characterize the electrochemical behavior of tin reduction and oxidation. The diffusion coefficient of stannous ions in the mixture of BMPOTF ionic liquid and MSA based electrolyte obtained via Randles-Sevcik and Cottrell equation was 2 × 10-7 cm2/s. Electroplating on copper panel was conducted under different current densities to determine BMPOTF based tin plating solution current efficiency. Mixture of BMPOTF and MSA based tin plating solution gave current efficiency as …

A Comparative Study Between China And Malaysia's Environmental Policy On Land : Implementation And Limitation., Zhang Yemo

Student Works (2010-2019)

In order to correct the political, economic, environment, social and spatial imbalance, almost all the countries have some forms of environmental policies on land and planning systems. Environmental policies and planning systems are in a more extensive application under the supervision of the environmental departments. Environmental polices play an important role in a country's overall economic development and also promotes regional development. Malaysia and China’s environmental polices are composed of many consecutive policy documents. Therefore, this work was undertaken in order to compare Malaysia and China’s environmental policy implementation specifically on land issue and to identify gaps between two countries …

The Thermal Characteristic Of Imipenem Encapsulated In Low And High Molecular Weight Of Polyethylene Glycol., Abdul Aziz Ismail

Student Works (2010-2019)

Microencapsulation technique is widely used in pharmaceutical industries to control the release of a drug. Biodegradable polymer such as Polyethylene glycol (PEG) is frequently used as encapsulation material. This study has tried to produce microencapsulation product of Imipenem antibiotics in Polyethylene Glycol.Commercially available product called Tienam® was used as a major source of Imipenem. We used freeze-drying method to produce the microencapsulation products. The successful of producing of this product is confirmed by the yellowish appearance of the product whereby it shows the colour properties of Tienam® Thermal analysis using Differential Scanning Calorimeter (DSC) was used to characterize pure materials …

Application Of Solid-Phase Microextraction For The Analysis Of Polycyclic Aromatic Hydrocarbons In Hyophila Involuta As A Natural Biosensor., Elizabeth Fong Yew Mei

Student Works (2010-2019)

This work describes a simple and rapid extraction method by using solid-phase microextraction (SPME) technique for the determination of polycyclic aromatic hydrocarbons (PAHs) from mosses of Hyophila involuta which is found commonly and abundantly throughout Peninsular Malaysia. Mosses have been chosen in our study since they are effective bioindicators as they take up nutrients and pollutants directly from the atmosphere and they have no root system. These properties make them ideal for evaluating pollutant levels in the air over a monitored period of time. This study has been developed and optimized based on the extraction of the analytes of interest …

Nonlinear Fiber Lasers Using Bismuth Based Erbium Doper Fiber Amplifier., Sharifeh Shahi

Student Works (2010-2019)

A thorough study on Bismuth-based Erbium-doped fiber (Bi-EDF) is presented for wide-band amplifiers and multi-wavelength fiber laser applications. This fiber allows high Erbium ions concentration to be doped without a significant concentration quenching effect. The high refractive index characteristic in the Bi-EDF has broadened the emission spectrum of Erbium ions to achieve a broader gain spectrum up to extended L-band region compared to normal silica-based Erbium-doped fiber (EDF). The Bi-EDFA performances have been investigated in terms of power conversion efficiency (PCE), quantum conversion efficiency (QCE), gain and noise figure. The highest QCE and PCE for a 215 cm long of …

Studies Of Antioxidant Activity Of Bioactive Compounds Derived From Ardisia Crispa., Hassan Mahmood Kzar Jindal

Student Works (2010-2019)

In recent times, researches have focused on medicinal plants in order to extract natural and low cost antioxidants that can help protect the human body against oxidative stress, and replace the synthetic additives that might be carcinogenic. In present study, the crude extracts of leaves and fruits from Ardisia crispa were investigated for their chemical constituents and antioxidant activity. Preliminary phytochemical screening of the crude extracts via TLC analysis revealed the presence of several secondary compounds mainly, terpenoids and phenolic compounds in addition to alkaloids and saponins. HPLC analysis showed the possibility of presence of gallic acid in the fruits …

Synthesis Of Urethane Acrylate Macromer From Palm Oil-Based Polyol And Its Application As A Resin For Dental Composite., Fadhel A. A. Alsanabani

Student Works (2010-2019)

A slightly branched urethane acrylate macromer (UAM) was synthesized by reacting palm oil-based polyol with excess amounts of polymeric methylene diphenyl diisocyanate (MDI) to form urethane prepolymer, then reacted with 2-hydroxyethyl methacrylate (HEMA) and FT-IR spectroscopy confirmed the urethane and grafted acrylate groups. 0.2% by weight of camphoroquinone (CQ) and 0.8% by weight of ethyl-4-N,N-dimethylamino-benzoate (4EDMAB) by weight were added to render the experimental resins light-curable. Their viscosity, percentage of degree of conversion (%DC) and cross-linking density (CLD), percentage of volumetric polymerization shrinkage (%VPS), water sorption and solubility, flexural strength, modulus of elasticity and toughness were determined and compared to …