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An Analysis Of Communication Anxiety And Reading Comprehension In Sixth, Seventh And Eighth Grade Students, Tami Mullens Davis Jan 2012

An Analysis Of Communication Anxiety And Reading Comprehension In Sixth, Seventh And Eighth Grade Students, Tami Mullens Davis

Electronic Theses and Dissertations

The goal of this research was to determine whether communication apprehension impacted reading comprehension in sixth, seventh, and eighth grade students and to examine the impact of family socio-economic status. Many studies have demonstrated the negative relationship between communication apprehension and academic achievement, however, studies of elementary and middle school students have been conspicuously missing from this research. Findings of this study indicated that the levels of communication apprehension rose slightly as grade level increased. Results showed that females in the study had higher levels of communication apprehension than males. The study also found that those students receiving free and …

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It's Not All About The Animals: Veterinarians' Perspectives On Their Work, Nicole Owens Jan 2012

It's Not All About The Animals: Veterinarians' Perspectives On Their Work, Nicole Owens

Electronic Theses and Dissertations

This study examines lived experiences of veterinarians. A common feature of being a veterinarian is curing and caring for nonhuman animals. It is the love and connection most veterinarians share for animals that ignite their journey to become an animal doctor. Data collected during semi-structured interviews with 17 veterinarians reveal that there are many more intricacies to the job than just animal medicine. These veterinarians suggest that they must treat animals as learning tools during veterinary training and once they complete school, they deal with people and business on a regular basis. Most veterinarians would like their jobs to be …

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Investigation Of Breakdown Power During Electrical Breakdown Of Aligned Array Of Carbon Nanotubes, Udai Bhanu Jan 2012

Investigation Of Breakdown Power During Electrical Breakdown Of Aligned Array Of Carbon Nanotubes, Udai Bhanu

Electronic Theses and Dissertations

Massively parallel arrays of single walled carbon nanotubes (SWNT) have attracted significant research interests because of their ability to (i) average out inhomogeneities of individual SWNTs, (ii) provide larger on currents, and (iii) reduce noise to provide higher cutoff frequency for radio frequency applications. However, the array contains both metallic and semiconducting SWNTs and the presence of metallic nanotube in an aligned array negatively affects the device properties. Therefore, it is essential to selectively remove metallic nanotubes to obtain better transistor properties. It was recently found that although such a selective removal can be effective for a low density array, …

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Infectious Disease Risks In Developing Countries: A Non-Market Valuation Exercise, Shreejata Samajpati Jan 2012

Infectious Disease Risks In Developing Countries: A Non-Market Valuation Exercise, Shreejata Samajpati

Electronic Theses and Dissertations

This dissertation focuses on the non-market valuation of health-risks of malaria, an infectious disease that imposes a substantive public health burden across the globe, hitting particularly hard the tropical developing nations of Africa and Asia. The United Nations Millennium Development Goals include malaria control as a priority and large investments are underway to promote effective prevention and treatment. Despite such concerted supply-side efforts, malaria-related mortality and morbidity still abound due to a complex interface of factors like climate-change, poverty, inadequate control behavior, infection and prevention externalities, parasite resistance etc. This research project digs into the demand-side of the health problem, …

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High Pressure Micro-Spectroscopy Of Biological Assemblies And Cells, Sang Hoon Park Jan 2012

High Pressure Micro-Spectroscopy Of Biological Assemblies And Cells, Sang Hoon Park

Electronic Theses and Dissertations

Functional properties of living cells depend on the thermodynamic variables such as temperature and pressure. A unique tool to investigate volume effects on structure and metabolism of the cell and biomolecules is pressure perturbation. We have developed a new setup that enables micro-spectroscopy and optical imaging of individual live cells at variable pressure from 0.1 to 400 MPa. Following characterization of the setup, pressure and temperature effects on the secondary structure of the peptide Poly-L-glutamic acid (PGA) in deuterated water buffer solution were investigated. The amide I band of PGA is sensitive to pressure and temperature, and by spectral deconvolution, …

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Postcranial Osteometric Assessment Of Korean Ancestry, Elizabeth Carol Okrutny Jan 2012

Postcranial Osteometric Assessment Of Korean Ancestry, Elizabeth Carol Okrutny

Electronic Theses and Dissertations

The determination of ancestry is an important part of an individual's identification when creating a biological profile. This thesis scrutinizes postcranial variation using over 65 osteometric sorting measurements in an attempt to identify those measurements that display the most significant differences among Koreans, Africans, and Europeans. Data was collected from four American skeletal collections and one South Korean skeletal collection for a total sample population of 306 individuals: 24 of Korean ancestry, 66 of African ancestry, and 216 of European ancestry. In an effort to minimize the number of measurements needed for ancestral assessment, stepwise discriminant analysis was performed for …

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Towards Evolving More Brain-Like Artificial Neural Networks, Sebastian Risi Jan 2012

Towards Evolving More Brain-Like Artificial Neural Networks, Sebastian Risi

Electronic Theses and Dissertations

An ambitious long-term goal for neuroevolution, which studies how artificial evolutionary processes can be driven to produce brain-like structures, is to evolve neurocontrollers with a high density of neurons and connections that can adapt and learn from past experience. Yet while neuroevolution has produced successful results in a variety of domains, the scale of natural brains remains far beyond reach. In this dissertation two extensions to the recently introduced Hypercube-based NeuroEvolution of Augmenting Topologies (HyperNEAT) approach are presented that are a step towards more brain-like artificial neural networks (ANNs). First, HyperNEAT is extended to evolve plastic ANNs that can learn …

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Fate Of Coated Zinc Oxide In Municipal Solid Waste Landfills, Stephanie Carbone Bolyard Jan 2012

Fate Of Coated Zinc Oxide In Municipal Solid Waste Landfills, Stephanie Carbone Bolyard

Electronic Theses and Dissertations

Given the increase in nanomaterial (NM) use in consumer products and the large fraction of waste placed in landfills worldwide, the probability of these products reaching municipal solid waste (MSW) landfills at the end of their useful life is high. Since nanotechnology use is still in its early stages, there are currently no regulations pertaining to the disposal of NMs and their fate in MSW landfills is still unknown. Understanding the fate of NMs in MSW landfills is vital to ensure the proper handling of these novel materials from cradle to grave; such research will provide information on how these …

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Developing Surface Engineered Liquid Crystal Droplets For Sensing Applications, Tanmay Bera Jan 2012

Developing Surface Engineered Liquid Crystal Droplets For Sensing Applications, Tanmay Bera

Electronic Theses and Dissertations

Diagnosis plays a very crucial role in medicine and health care, which makes biosensors extremely important in modern technological context. Till date, various types of biosensors have been developed that are capable of detecting a wide range of biologically important species with great sensitivity and selectivity. However, most of these sensing units require highly sophisticated instrumentation and often lack the desired portability. Liquid crystal (LC) droplets, on the other hand, are a new type of functional material that are finding increasing research attention as a new sensing unit due to their tunable optical property, high surface area, portability and cost-effectiveness. …

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Investigation Of Tactile Displays For Robot To Human Communication, Daniel Barber Jan 2012

Investigation Of Tactile Displays For Robot To Human Communication, Daniel Barber

Electronic Theses and Dissertations

Improvements in autonomous systems technology and a growing demand within military operations are spurring a revolution in Human-Robot Interaction (HRI). These mixed-initiative human-robot teams are enabled by Multi-Modal Communication (MMC), which supports redundancy and levels of communication that are more robust than single mode interaction. (Bischoff & Graefe, 2002; Partan & Marler, 1999). Tactile communication via vibrotactile displays is an emerging technology, potentially beneficial to advancing HRI. Incorporation of tactile displays within MMC requires developing messages equivalent in communication power to speech and visual signals used in the military. Toward that end, two experiments were performed to investigate the feasibility …

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An Assessment Of Ecological Processes In The Apalachicola Estuarine System, Florida, Daina Smar Jan 2012

An Assessment Of Ecological Processes In The Apalachicola Estuarine System, Florida, Daina Smar

Electronic Theses and Dissertations

The following is a compilation of field data collected in 2011 and 2012 in Apalachicola, FL as part of a five year study assessing the ecological effects of sea level rise in the northern Gulf of Mexico. Many coastal communities, both natural and developed, will soon be working to mitigate the effects of sea level rise, if they are not already doing so. This thesis investigates the natural patterns of the Apalachicola estuarine system through the collection and analysis of in situ water, sediment, and biomass samples. Additionally, results of the field samples are presented and recommendations for additional sampling …

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Computational Methods For Analyzing Rna Folding Landscapes And Its Applications, Yuan Li Jan 2012

Computational Methods For Analyzing Rna Folding Landscapes And Its Applications, Yuan Li

Electronic Theses and Dissertations

Non-protein-coding RNAs play critical regulatory roles in cellular life. Many ncRNAs fold into specific structures in order to perform their biological functions. Some of the RNAs, such as riboswitches, can even fold into alternative structural conformations in order to participate in different biological processes. In addition, these RNAs can transit dynamically between different functional structures along folding pathways on their energy landscapes. These alternative functional structures are usually energetically favored and are stable in their local energy landscapes. Moreover, conformational transitions between any pair of alternate structures usually involve high energy barriers, such that RNAs can become kinetically trapped by …

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A Retrospective Analysis And Field Study Of Nanotechnology Related Ergonomic Risk In Industries Utilizing Nanomaterials, Wanda Greaves-Holmes Jan 2012

A Retrospective Analysis And Field Study Of Nanotechnology Related Ergonomic Risk In Industries Utilizing Nanomaterials, Wanda Greaves-Holmes

Electronic Theses and Dissertations

The National Science Foundation estimates that two million skilled nanotechnology workers will be needed world wide by 2015 – one million of them in the United States (2001). In the absence of scientific clarity about the potential health effects of occupational exposure to nanoparticles, guidance in decision making about hazards, risk, and controls takes on new importance. Currently, guiding principles on personal protective equipment for workers who come in contact with nanomaterials have not been standardized universally. Utilizing the NASATLX, this dissertation investigates the adequacy and shortcomings of research efforts that seek to determine whether or not occupational exposure to …

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Biogeochemical Cycling And Nutrient Control Strategies For Groundwater At Stormwater Infiltration Basins, Andrew M. O'Reilly Jan 2012

Biogeochemical Cycling And Nutrient Control Strategies For Groundwater At Stormwater Infiltration Basins, Andrew M. O'Reilly

Electronic Theses and Dissertations

Elevated concentrations of nutrients, particularly nitrate, in groundwater and springs in Florida are a growing resource management concern. Stormwater infiltration basins, which are a common stormwater management practice in the well-drained karst terrain areas of Florida, are a potentially important source of nutrients to the groundwater system because stormwater exits the basin by only evaporation or infiltration. To better understand the biogeochemical processes integrating stormwater infiltration impacts on groundwater resources in a field-scale setting, a combination of hydrologic, soil chemistry, water chemistry, dissolved and soil gas, isotope, and microbiological data was collected from 2007 through 2010 at two stormwater infiltration …

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Application And Optimization Of Membrane Processes Treating Brackish And Surficial Groundwater For Potable Water Production, Jayapregasham Tharamapalan Jan 2012

Application And Optimization Of Membrane Processes Treating Brackish And Surficial Groundwater For Potable Water Production, Jayapregasham Tharamapalan

Electronic Theses and Dissertations

The research presented in this dissertation provides the results of a comprehensive assessment of the water treatment requirements for the City of Sarasota. The City’s drinking water supply originates from two sources: (1) brackish groundwater from the Downtown well field, and (2) Floridan surficial groundwater from the City’s Verna well field. At the time the study was initiated, the City treated the brackish water supply using a reverse osmosis process that relied on sulfuric acid for pH adjustment as a pretreatment method. The Verna supply was aerated at the well field before transfer to the City’s water treatment facility, either …

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Towards Scalable Nanomanufacturing: Modeling The Interaction Of Charged Droplets From Electrospray Using Gpu, Weiwei Yang Jan 2012

Towards Scalable Nanomanufacturing: Modeling The Interaction Of Charged Droplets From Electrospray Using Gpu, Weiwei Yang

Electronic Theses and Dissertations

Electrospray is an atomization method subject to intense study recently due to its monodispersity and the wide size range of droplets it can produce, from nanometers to hundreds of micrometers. This thesis focuses on the numerical and theoretical modeling of the interaction of charged droplets from the single and multiplexed electrospray. We studied two typical scenarios: large area film depositions using multiplexed electrospray and fine pattern printings assisted by linear electrostatic quadrupole focusing. Due to the high computation power requirement in the unsteady n-body problem, graphical processing unit (GPU) which delivers 10 Tera flops in computation power is used to …

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Evaluation Of An On-Line Device To Monitor Scale Formation In A Brackish Water Reverse Osmosis Membrane Process, Jennifer C. Roque Jan 2012

Evaluation Of An On-Line Device To Monitor Scale Formation In A Brackish Water Reverse Osmosis Membrane Process, Jennifer C. Roque

Electronic Theses and Dissertations

A modified two-element membrane pressure vessel assembly has been used to monitor process operational changes in a full-scale reverse osmosis (RO) water treatment plant (WTP). This study evaluated the effectiveness of the assembly as an on-line monitoring device intended to detect scale formation conditions when connected to an operating RO process train. This study was implemented to support the requirements of a larger University of Central Florida (UCF) research project ongoing at the city of Sarasota’s Public Works and Utilities (City) water treatment facilities located in Sarasota, Florida. During the time-frame of this study, the City was in the process …

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Evaluation Of Biosorption Activated Media Under Roadside Swales For Stormwater Quality Improvement And Harvesting, Andrew Charles Hood Jan 2012

Evaluation Of Biosorption Activated Media Under Roadside Swales For Stormwater Quality Improvement And Harvesting, Andrew Charles Hood

Electronic Theses and Dissertations

Stormwater runoff from highways is a source of pollution to surface water bodies and groundwater. This project develops a bio-detention treatment and harvesting system that is incorporated into roadside swales. The bio-detention system uses Bold & Gold™, a type of biosorption activated media (BAM), to remove nutrients from simulated highway runoff and then store the water in underground vaults for infiltration, controlled discharge, and/or irrigation and other non-potable applications. In order to design a bio-detention system, media characteristics and media/water quality relationships are required. Media characteristics determined through testing include: specific gravity, permeability, infiltration, maximum dry density, moisture content of …

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Construction And Demolition Debris Recovery And Recycling In Orange County, Fl, Michael Stephen Toth Ii Jan 2012

Construction And Demolition Debris Recovery And Recycling In Orange County, Fl, Michael Stephen Toth Ii

Electronic Theses and Dissertations

In 2008, the State of Florida established a recycling goal of 75% to be achieved by 2020. In response to the Florida goal Orange County (OC), Florida has made the development and implementation of an efficient strategy for landfill diversion of its solid waste a top priority. The Florida Department of Environmental Protection (FDEP) estimated that 23 % of municipal solid waste was generated by construction and demolition (C&D) activities in 2009, with only 30 percent of C&D debris being recycled. Therefore, OC decided to create a solid waste integrated resource plan (SWIRP) initially focused on the recovery and recycling …

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Turbidity Removal Efficiency And Toxicity Issues Associated With The Chitosan-Based Dual Bio-Polymer Systems, Rylee Hernandez Jan 2012

Turbidity Removal Efficiency And Toxicity Issues Associated With The Chitosan-Based Dual Bio-Polymer Systems, Rylee Hernandez

Electronic Theses and Dissertations

Stormwater runoff can be a great concern in the State of Florida due to the impact the quality of the runoff water can have on the natural water bodies. Stormwater runoff can carry pollutants and sediments which can cause both physical and biological risks in an aquatic ecosystem such as a lake, river, or pond. Polymers, namely the chitosan-based dual polymer system, can be used remove the sediment from this runoff to ensure the safety of the state’s water bodies. Three soils are used in this testing: AASTO soil classifications A-3(sandy soil) and A-2- 4 (silty-sand), and a soil with …

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Incorporating Remotely Sensed Data Into Coastal Hydrodynamic Models: Parameterization Of Surface Roughness And Spatio-Temporal Validation Of Inundation Area, Stephen Conroy Medeiros Jan 2012

Incorporating Remotely Sensed Data Into Coastal Hydrodynamic Models: Parameterization Of Surface Roughness And Spatio-Temporal Validation Of Inundation Area, Stephen Conroy Medeiros

Electronic Theses and Dissertations

This dissertation investigates the use of remotely sensed data in coastal tide and inundation models, specifically how these data could be more effectively integrated into model construction and performance assessment techniques. It includes a review of numerical wetting and drying algorithms, a method for constructing a seamless digital terrain model including the handling of tidal datums, an investigation into the accuracy of land use / land cover (LULC) based surface roughness parameterization schemes, an application of a cutting edge remotely sensed inundation detection method to assess the performance of a tidal model, and a preliminary investigation into using 3-dimensional airborne …

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Thermally Annealled Plasmonic Nanostructures, Chaoming Wang Jan 2012

Thermally Annealled Plasmonic Nanostructures, Chaoming Wang

Electronic Theses and Dissertations

Localized surface plasmon resonance (LSPR) is induced in metal nanoparticles by resonance between incident photons and conduction electrons in nanoparticles. For noble metal nanoparticles, LSPR can lead to strong absorbance of ultraviolet-violet light. Although it is well known that LSPR depends on the size and shape of nanoparticles, the inter-particle spacing, the dielectric properties of metal and the surrounding medium, the temperature dependence of LSPR is not well understood. By thermally annealing gold nanoparticle arrays formed by nanosphere lithography, a shift of LSPR peak upon heating has been shown. The thermal characteristics of the plasmonic nanoparticles have been further used …

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Making A Difference: Measuring The Effectiveness Of Mississippi Teacher Corps Teachers As Compared To Non-Mississippi Teacher Corps Teachers, James Benjamin Guest Jan 2012

Making A Difference: Measuring The Effectiveness Of Mississippi Teacher Corps Teachers As Compared To Non-Mississippi Teacher Corps Teachers, James Benjamin Guest

Electronic Theses and Dissertations

The Mississippi Teacher Corps (MTC) was founded in 1989. Over the past 23 years more than 500 MTC participants have taught in critical-needs schools in Mississippi. The purpose of this study was to examine the effectiveness of Mississippi Teacher Corps teachers as compared to non-Mississippi Teacher Corps teachers. The method of research was a quantitative analysis of standardized test scores from the "Rural County School District" for school year 2009–2010. The analysis shothat there is no significant difference in mean test scores of students who are taught by MTC teachers as compared to non-MTC teachers but that, in both the …

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Computational Investigation Of The Mechanism Of N5-Carboxyaminoimidazole Ribonculeotide Synthetase, Venkata Pakkala Jan 2012

Computational Investigation Of The Mechanism Of N5-Carboxyaminoimidazole Ribonculeotide Synthetase, Venkata Pakkala

Electronic Theses and Dissertations

N5-CAIR synthetase catalyzes the conversion of 5-amino-imidazole ribonucleotide (AIR), Mg2ATP, and bicarbonate into N5-CAIR, Mg2ADP, and inorganic phosphate. DFT and ONIOM QM/MM computations revealed that the first step in the reaction mechanism of N5-CAIR synthetase involves the formation of dianionic carboxyphosphate (CP) from the attack of bicarbonate on the γ- phosphate of Mg2ATP, through an SN2 type transition structure. Properties of CP were never reported, as this compound is extremely unstable (t1/2 of 70 ms). Therefore, high level ab inito (MP2 and CCSD(T)), and DFT (B3LYP, BB1K, M05-2X, M06-2X and MPW1K) methods were used to investigate the structure and energetics …

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Mass Spectrometry Applied To Problems In Lipid Biochemistry: Microchip Based Approach For Lipidomics Profiling And Analysis Of Lipid Metabolites By Lc-Ms/Ms, Tao Sun Jan 2012

Mass Spectrometry Applied To Problems In Lipid Biochemistry: Microchip Based Approach For Lipidomics Profiling And Analysis Of Lipid Metabolites By Lc-Ms/Ms, Tao Sun

Electronic Theses and Dissertations

Lipidomics and metabolomics are powerful tools for the examination of cellular metabolism and physiology. Methods for lipid analysis need to be developed that begin with small samples and do not overly dilute or disperse the sample in the separation process. Microchips provide a platform for interfacing lysis of small cell populations with on-chip solid phase extraction for isolating lipid samples to generate high quality mass spectra from very small samples. Chapter 1 of this dissertation presents a novel method for small scale lipidomics of bacterial cells by microchip based extraction coupled with untargeted profiling of glycerophospholipids using nanoelectrospray ionization mass …

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Cultivating A Rainbow Median Through The Study Of Sexuality In Second Language Acquisition: Identity Construction Of Lesbian Women Native To The Southern Region Of The United States, Elizabeth Walker Graves Jan 2012

Cultivating A Rainbow Median Through The Study Of Sexuality In Second Language Acquisition: Identity Construction Of Lesbian Women Native To The Southern Region Of The United States, Elizabeth Walker Graves

Electronic Theses and Dissertations

Despite diverging theories concerning the dissimilarities between male and female speakers, there is a general consensus that there is relevance in the relationship between gender and language, especially when considering the sociolinguistic effects of gender in second language acquisition and for the L2 learner. While there is a wealth of publications dedicated to examining the relationship between gendered roles and language, the idea of superseding the study of gender roles with a more comprehensive and considered study of gender identities has not been as forthcoming until very recently. Furthermore, there is little significant research into the relationship between gender identity …

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Preformulation Characterization And Formulation Development Of Δ9-Tetrahydrocannabinol Prodrugs For Potential Treatment Of Glacuoma, Tushar Hingorani Jan 2012

Preformulation Characterization And Formulation Development Of Δ9-Tetrahydrocannabinol Prodrugs For Potential Treatment Of Glacuoma, Tushar Hingorani

Electronic Theses and Dissertations

Relationship between smoking marihuana and a drop in intraocular pressure (IOP) was first reported in 1971. Research efforts since then have identified a number of constituents that could be linked to this observation. Delta-9-Tetrahydrocannabinol (THC) was one of the ingredients identified. However, four decades and numerous research efforts since the first observation, it has still not been concluded whether THC is effective in the treatment of glaucoma or not. Current therapy for IOP control in glaucoma, though effective, cannot prevent vision loss completely. Thus, identification of agents that can lower IOP as well as protect the retinal ganglion cells from …

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Anticancer And Antibiotic Leads From Marine Organis, Bin Wang Jan 2012

Anticancer And Antibiotic Leads From Marine Organis, Bin Wang

Electronic Theses and Dissertations

During the past three decades, the development of marine natural products as drug leads has become a promising avenue for research. As our efforts towards the discovery of anticancer and antibiotic drug leads from marine organisms, modifications of anticancer drug candidate kahalalide F, isolations of new peptides from the mollusk, Elysia rufescens and anticancer drug leads from the NCI repository, as well as chemical regulation of antibiotic production from marine Pseudomonas aeruginosa were investigated. Kahalalide F (KF) is a potent anticancer lead isolated from the herbivorous marine mollusk E. rufescens and its algal diet Bryopsis pennata. Our semisynthesis approach was …

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Antimalarials From Plant Pathogenic Fungi, Mallika Kumarihamy Jan 2012

Antimalarials From Plant Pathogenic Fungi, Mallika Kumarihamy

Electronic Theses and Dissertations

The purpose of this study was to discover antimalarial compounds from necrotropic plant pathogenic fungi. Various phytotoxins released by necrotropic plant pathogenic fungi may inhibit the plant-like metabolic pathways in the apicoplast, a chloroplast-like organelle, essential for the survival of apicomplexan parasites, such as Plasmodium which cause malaria in humans. This dissertation describes the isolation, characterization, and biological evaluation of secondary metabolites of eight fungal strains. In addition to the antiplasmodial assay, all the extracts were subjected to phytotoxic, antimicrobial, and cytotoxic bioassays. Isolation of metabolites was performed by chromatographic methods and identification was carried out by spectroscopic and spectrometric …

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Investigations Of Noncovalent Interactions Using Raman Spectroscopy And Electronic Structure Computations, Ashley Wright Jan 2012

Investigations Of Noncovalent Interactions Using Raman Spectroscopy And Electronic Structure Computations, Ashley Wright

Electronic Theses and Dissertations

This dissertation research focuses on the effects of noncovalent interactions on vibrational energy levels. Vibrational spectroscopy is a powerful tool for the study of the effects of weak intermolecular interactions such as hydrogen bonding and interactions with the environment, including solvation effects. Changes in the vibrational spectra of interacting molecules allow us to ascertain exactly which atoms and bonds are affected and to what extent they are affected. Quantum mechanical methods, ab initio theory and density functional theory, are employed to model molecular geometries, properties, and subtle interactions between molecules. Much of this research centers on the comparison of these …

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