Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Social and Behavioral Sciences (28)
- Forensic Science and Technology (24)
- Legal Studies (24)
- Life Sciences (14)
- Biochemistry, Biophysics, and Structural Biology (11)
-
- Medicine and Health Sciences (11)
- Biochemistry (10)
- Environmental Chemistry (10)
- Other Chemistry (9)
- Analytical Chemistry (5)
- Medicinal-Pharmaceutical Chemistry (5)
- Physics (5)
- Optics (4)
- Organic Chemistry (4)
- Physical Chemistry (4)
- Chemicals and Drugs (3)
- Diseases (3)
- Engineering (3)
- Materials Chemistry (3)
- Polymer Chemistry (3)
- Analytical, Diagnostic and Therapeutic Techniques and Equipment (2)
- Cancer Biology (2)
- Cell and Developmental Biology (2)
- Education (2)
- Electrical and Computer Engineering (2)
- Environmental Sciences (2)
- Fire Science and Firefighting (2)
- Forensic Chemistry (2)
- Keyword
-
- 2 (12)
- 1 (11)
- Chemistry (11)
- Forensic (10)
- Two photon absorption (8)
-
- 3 (6)
- Catalysis (6)
- Nanoparticles (6)
- Polymers (6)
- 4-oxadiazoles (5)
- Chemometrics (5)
- Insecticides (5)
- Piperylene (5)
- Degradation (4)
- Forensic Science (4)
- Magnesium (4)
- Polycyclic aromatic hydrocarbons (4)
- Two photon absorbing materials (4)
- 5-disubstituted-1 (3)
- Cancer (3)
- Conjugated polymers (3)
- DNA (3)
- Fluorescence (3)
- Fluorescence microscopy (3)
- Forensic sciences (3)
- Forensics (3)
- Fuel cells (3)
- MS) (3)
- Methanol (3)
- Optical data storage (3)
- Publication Year
- Publication
-
- Electronic Theses and Dissertations (191)
- Retrospective Theses and Dissertations (51)
- Honors Undergraduate Theses (35)
- Electronic Theses and Dissertations, 2020-2023 (31)
- Libraries' Newsletters (5)
-
- HIM 1990-2015 (3)
- Digital Repository: Showcase of Undergraduate Research Excellence (2)
- Faculty Scholarship and Creative Works (2)
- Graduate Thesis and Dissertation 2023-2024 (2)
- Florida DOT (1)
- Graduate Studies Theses and Dissertations 2026 (1)
- The Pegasus Review: UCF Undergraduate Research Journal (1)
- Publication Type
Articles 151 - 180 of 325
Full-Text Articles in Chemistry
Novel Developments On The Extraction And Analysis Of Polycyclic Aromatic Hydrocarbons In Environmental Samples, Walter Wilson
Novel Developments On The Extraction And Analysis Of Polycyclic Aromatic Hydrocarbons In Environmental Samples, Walter Wilson
Electronic Theses and Dissertations
This dissertation focuses on the development of analytical methodology for the analysis of polycyclic aromatic hydrocarbons (PAHs) in water samples. Chemical analysis of PAHs is of great environmental and toxicological importance. Many of them are highly suspect as etiological agents in human cancer. Among the hundreds of PAHs present in the environment, the U.S. Environmental Protection Agency (EPA) lists sixteen as "Consent Decree" priority pollutants. Their routine monitoring in environmental samples is recommended to prevent human contamination risks. A primary route of human exposure to PAHs is the ingestion of contaminated water. The rather low PAH concentrations in water samples …
Photo-Induced Protonation Of Polyaniline Composites And Mechanistic Study Of The Degradation Of Polychlorinated Biphenyls With Zero-Valent Magnesium, Candace Kirkland
Photo-Induced Protonation Of Polyaniline Composites And Mechanistic Study Of The Degradation Of Polychlorinated Biphenyls With Zero-Valent Magnesium, Candace Kirkland
Electronic Theses and Dissertations
As technology advances, a need for non-metal, conductive materials has arisen for several types of applications. Lithographic techniques are helpful to develop some of these applications. Such techniques require materials that are insulating and become conductive after irradiated. Composites of polyaniline in its emeraldine base form (PANI-EB) doped with photo-acid generators (PAG) become conductive upon photo-irradiation. This increase in conductivity is due to the protonation of PANI-EB. Such materials may be utilized to fabricate conducting patterns by photo-irradiation; however, the conductivity obtained by direct irradiation of PANI-EB/PAG composites is normally quite low (<10-3 S/cm) due to aggregation of highly loaded PAG. In this work, poly(ethylene glycol) (PEG), a proton transfer polymer, was added to PANI-EB/PAG. Results showed the addition of low molecular weight (MW) (550) PEG significantly enhanced the photo-induced conductivity to a level comparable to that of PANI-salt synthesized by oxidizing aniline in the presence of an acid. High MW (8000) PEG is less effective than PEG 550, and composites of PANI-EB and N-PEG-PANI showed conductivity as high as 102 S/cm after treatment with HCl vapor. The photo-induced conductivity of the N-PEG-PANI/PANI-EB/PAG composite reached 10-2-10-1 S/cm. Polychlorinated biphenyls (PCBs) are a class of chemicals with 209 different congeners, some of which are known carcinogens, and are persistent organic pollutants in the environment. After its synthesis, it was seen as a phenomenal additive in a multitude of different applications leading to the wide spread use of PCBs and a need for a safe, effective, and inexpensive remediation technique. While it is known that magnesium can degrade PCBs, the mechanism of this reaction was not well-understood. In order for magnesium to be broadly used as a remediation tool, it is necessary to fully understand how the reaction is taking place and if the PCBs are able to be fully dechlorinated into biphenyl. This research focuses on the hydrodechlorination of PCBs with zero-valent magnesium in acidified ethanol. The degradation pathways of 2, 2', 3, 5, 5', 6- hexachlorobiphenyl were investigated to determine the identity of the daughter PCBs produced, how and if they continue to be dechlorinated into biphenyl. The proton source for this hydrodehalogenation reaction was also studied using both deuterated solvent and acid to give more detail to the mechanism of this reaction.
Structural And Functional Studies Of Glycine Riboswitches And Development Of Fab Chaperone Assisted Rna Crystallography, Eileen Sherman
Structural And Functional Studies Of Glycine Riboswitches And Development Of Fab Chaperone Assisted Rna Crystallography, Eileen Sherman
Electronic Theses and Dissertations
The glycine riboswitch is a structured RNA found upstream of genes in mRNA transcripts in many bacteria, functioning as a biofeedback gene regulator. Upon binding glycine, a complete RNA transcript including gene sequences is transcribed, effectively turning on gene expression. In an effort to understand the intricacies of its functioning, many mutants of the riboswitch were made and characterized during Ph. D. work, resulting in discovery of a P0 duplex/kink-turn motif involving a few nucleotides upstream of the established glycine riboswitch sequence which changed its ligand binding characteristics (Chapter 1). Previously, the two aptamers of the riboswitch were thought to …
Degradation Of Hydrazine And Monomethylhydrazine For Fuel Waste Streams Using Alpha-Ketoglutaric Acid, Carolina Franco
Degradation Of Hydrazine And Monomethylhydrazine For Fuel Waste Streams Using Alpha-Ketoglutaric Acid, Carolina Franco
Electronic Theses and Dissertations
Alpha-ketoglutaric acid (AKGA) is an organic acid important for the metabolism of essential amino acids as well as for the transfer of cellular energy. It is a precursor of glutamic acid which is produced by the human body during the Krebs Cycle. AKGA has a specific industrial interest as it can be taken as a dietary supplement and is also widely used as a building block in chemical synthesis. Collectively termed as hydrazine (HZs), hydrazine (HZ) and monomethylhydrazine (MMH) are hypergolic fuels that do not need an ignition source to burn. Because of the particular HZs' characteristics the National Aeronautics …
Application Of Two-Photon Absorbing Fluorene-Containing Compounds In Bioimaging And Photodyanimc Therapy, Xiling Yue
Application Of Two-Photon Absorbing Fluorene-Containing Compounds In Bioimaging And Photodyanimc Therapy, Xiling Yue
Electronic Theses and Dissertations
Two-photon absorbing (2PA) materials has been widely studied for their highly localized excitation and nonlinear excitation efficiency. Application of 2PA materials includes fluorescence imaging, microfabrication, 3D data storage, photodynamic therapy, etc. Many materials have good 2PA photophysical properties, among which, the fluorenyl structure and its derivatives have attracted attention with their high 2PA cross-section and high fluorescence quantum yield. Herein, several compounds with 2PA properties are discussed. All of these compounds contain one or two fluorenyl core units as part of the conjugated system. The aim of this dissertation is to discuss the application of these compounds according to their …
Action Potentials As Indicators Of Metabolic Perturbations For Temporal Proteomic Analysis, Aditya Reddy Kolli
Action Potentials As Indicators Of Metabolic Perturbations For Temporal Proteomic Analysis, Aditya Reddy Kolli
Electronic Theses and Dissertations
The single largest cause of compound attrition during drug development is due to inadequate tools capable of predicting and identifying protein interactions. Several tools have been developed to explore how a compound interferes with specific pathways. However, these tools lack the potential to chronically monitor the time dependent temporal changes in complex biochemical networks, thus limiting our ability to identify possible secondary signaling pathways that could lead to potential toxicity. To overcome this, we have developed an in silico neuronal-metabolic model by coupling the membrane electrical activity to intracellular biochemical pathways that would enable us to perform non-invasive temporal proteomics. …
Multifunctional And Responsive Polyelectrolyte Nanostructures, Astha Malhotra
Multifunctional And Responsive Polyelectrolyte Nanostructures, Astha Malhotra
Electronic Theses and Dissertations
A polyelectrolyte complex is formed by mixing two oppositely charged polyelectrolytes in a solution. The electrostatic interactions between partially charged polymeric chains lead to the formation of a stable complex while avoiding the use of covalent cross linkers. Since complex formation can improve the stability of polyelectrolyte and metal ions in polyelectrolyte can provide various functionalities, PECs incorporated with metal ions are promising candidates for manufacturing stable and multifunctional structures. While the coordination of metal ions and polyelectrolytes has been extensively investigated in solutions and multilayer films, to our knowledge, no research has been performed to study the effect of …
Theoretical Tailoring Of Perforated Thin Silver Films For Surface Plasmon Resonance Affinity, Renan Gongora
Theoretical Tailoring Of Perforated Thin Silver Films For Surface Plasmon Resonance Affinity, Renan Gongora
HIM 1990-2015
Metallic films, in conjunction with biochemical-targeted probes, are expected to provide early diagnosis, targeted therapy and non-invasive monitoring for epidemiology applications [1-4]. The resonance wavelength peaks, both plasmonic and Wood-Rayleigh Anomalies (WRAs), in the scattering spectra are affected by the metallic architecture. As of today, much research has been devoted to extinction efficiency in the plasmonic region. However, Wood Rayleigh Anomalies (WRAs) typically occur at wavelengths associated with the periodic distance of the structures. A significant number of papers have already focused on the plasmonic region of the visible spectrum, but a less explored area of research was presented here; …
Squaraine Dyes For Two-Photon Fluorescence Bioimaging Applications, Maria Colon Gomez
Squaraine Dyes For Two-Photon Fluorescence Bioimaging Applications, Maria Colon Gomez
HIM 1990-2015
No abstract provided.
Non-Destructive Analysis Of Trace Textile Fiber Evidence Via Room-Temperature Fluorescence Spectrocopy, Krishnaveni Appalaneni
Non-Destructive Analysis Of Trace Textile Fiber Evidence Via Room-Temperature Fluorescence Spectrocopy, Krishnaveni Appalaneni
Electronic Theses and Dissertations
Forensic fiber evidence plays an important role in many criminal investigations. Nondestructive techniques that preserve the physical integrity of the fibers for further court examination are highly valuable in forensic science. Non-destructive techniques that can either discriminate between similar fibers or match a known to a questioned fiber - and still preserve the physical integrity of the fibers for further court examination - are highly valuable in forensic science. When fibers cannot be discriminated by non-destructive tests, the next reasonable step is to extract the questioned and known fibers for dye analysis with a more selective technique such as high-performance …
Light-Matter Interactions Of Plasmonic Nanostructures, Jennifer Reed
Light-Matter Interactions Of Plasmonic Nanostructures, Jennifer Reed
Electronic Theses and Dissertations
Light interaction with matter has long been an area of interest throughout history, spanning many fields of study. In recent decades, the investigation of light-matter interactions with nanostructures has become an intense area of research in the field of photonics. Metallic nanostructures, in particular, are of interest due to the interesting properties that arise when interacting with light. The properties are a result of the excitation of surface plasmons which are the collective oscillation of the conduction electrons in the metal. Since the conduction electrons can be thought of as harmonic oscillators, they are quantized in a similar fashion. Just …
Magnesium And Acidified Ethanol Based Treatment Systems For The Extraction And Dechlorination Of Polychlorinated Biphenyls From Contaminated Oils, Paints, And Soils, Simone Novaes-Card
Magnesium And Acidified Ethanol Based Treatment Systems For The Extraction And Dechlorination Of Polychlorinated Biphenyls From Contaminated Oils, Paints, And Soils, Simone Novaes-Card
Electronic Theses and Dissertations
Polychlorinated biphenyls (PCBs) are a class of environmentally persistent halogenated organic compounds that were once used as stabilizers to improve the properties of a variety of materials such as lubricants, heat transfer fluids, paints, and caulking materials. PCBs are also capable of migration through processes such as spillage into soils, leaching into groundwater, and volatilization into the atmosphere. Although banned in 1979 over health concerns, PCBs persist in these materials to this day because they are resistant to biotic degradation and natural weathering processes. The wide variety of contaminated materials means that many existing treatment options cannot be used across …
Photophysical And Photochemical Factors Affecting Multi-Photon Direct Laser Writing Using The Cross-Linkable Epoxide Su-8, Henry Williams
Photophysical And Photochemical Factors Affecting Multi-Photon Direct Laser Writing Using The Cross-Linkable Epoxide Su-8, Henry Williams
Electronic Theses and Dissertations
For the past decade, the epoxy based photoresist SU-8 has been used commercially and in the lab for fabricating micro- and nano-structures. Investigators have studied how processing parameters such as pre- and post-exposure bake temperatures affect the resolution and quality of SU-8 structures patterned using ultraviolet or x-ray lithography. Despite the advances in understanding the phenomena, not all of them have been explored, especially those that are specific to multi-photon direct laser writing (mpDLW). Unlike conventional exposure techniques, mpDLW is an inherently three-dimensional (3D) process that is activated by nonlinear absorption of light. This dissertation reports how several key processing …
Chemometric Applications To A Complex Classification Problem: Forensic Fire Debris Analysis, Erin Waddell
Chemometric Applications To A Complex Classification Problem: Forensic Fire Debris Analysis, Erin Waddell
Electronic Theses and Dissertations
Fire debris analysis currently relies on visual pattern recognition of the total ion chromatograms, extracted ion profiles, and target compound chromatograms to identify the presence of an ignitable liquid. This procedure is described in the ASTM International E1618-10 standard method. For large data sets, this methodology can be time consuming and is a subjective method, the accuracy of which is dependent upon the skill and experience of the analyst. This research aimed to develop an automated classification method for large data sets and investigated the use of the total ion spectrum (TIS). The TIS is calculated by taking an average …
On The Capillary Electrophoresis Of Monohydroxy Metabolites Of Polycyclic Aromatic Hydrocarbons And Its Application To The Analysis Of Biological Matrices, Gaston Knobel
Electronic Theses and Dissertations
Polycyclic aromatic hydrocarbons (PAH) are a class of environmental pollutants consisting of a minimum of two fused aromatics rings originating from the incomplete combustion of organic matter and/or anthropogenic sources. Numerous possible anthropogenic and natural sources make the presence of PAH ubiquitous in the environment. The carcinogenic nature of some PAH and their ubiquitous presence makes their chemical analysis a topic of environmental and toxicological importance. Although environmental monitoring of PAH is an important step to prevent exposure to contaminated sites, it provides little information on the actual uptake and subsequent risks. Parent PAH are relatively inert and need metabolic …
Electrical, Optical And Chemical Properties Of Organic Photo Sensitve Materials, Zheng Shi
Electrical, Optical And Chemical Properties Of Organic Photo Sensitve Materials, Zheng Shi
Electronic Theses and Dissertations
Light as a “green” source of energy has become increasingly attractive throughout the past century and has shown versatility for the application of activating chemical reactions. Compared with traditional energy sources, it provides a more direct, selective and controllable method. My PhD study was focused on the study of photochemistry of organic materials in two different systems. The first system is regarding reversible photoacids which generate protons on irradiation. With the aim of systematically studying these novel types of long lived photoacids, a series of photoacids was designed, synthesized and whose chemical mechanism was thoroughly investigated. This type of photoacid …
Development Of Novel Redox Sensors And Processes Towards Biological Applications, Jigna Patel
Development Of Novel Redox Sensors And Processes Towards Biological Applications, Jigna Patel
Electronic Theses and Dissertations
Research on the cure and early detection of diseases such as diabetes, Alzheimer's, and Parkinson's is becoming of great interest due to the increasing number of people affected by them every year. An accurate and quick detection of various damaging species is highly critical in treatments of such diseases not only for exploring possible cures but also for early detection. If these diseases are detected during the initial stages than the possibility of curing them is much higher. Motivated by this, many researchers today have developed numerous types of sensing devices that can detect various physiological and biological compounds. However, …
Novel Optical Properties Of Metal Nanostructures Based On Surface Plasmons, Haining Wang
Novel Optical Properties Of Metal Nanostructures Based On Surface Plasmons, Haining Wang
Electronic Theses and Dissertations
Surface plasmons have been attracted extensive interests in recent decades due to the novel properties in nanometer sized dimensions. My work focused on the novel optical properties of metal nanostructures based on surface plasmons using theoretical simulation methods. In the first part, we investigated metal nanofilms and nanorods and demonstrated that extremely low scattering efficiency, high absorption efficiency and propagation with long distance could be obtained by different metal nanostructures. With a perforated silver film, we demonstrated that an extremely low scattering cross section with an efficiency of less than 1% can be achieved at tunable wavelengths with tunable widths. …
Biochemical Characterization Of The Nifb Enzyme And Nifb-Cofactor, Jirair Gevorkyan
Biochemical Characterization Of The Nifb Enzyme And Nifb-Cofactor, Jirair Gevorkyan
Electronic Theses and Dissertations
The Mo-nitrogenase complex is composed of two components, Fe-protein and MoFe-protein. This complex is able to catalyze the reduction of N2 through the MgATP dependent transfer of electrons from the Fe-protein Fe4S4 cluster to the MoFe-protein P-cluster and, subsequently, to the iron-molybdenum cofactor (FeMoco). FeMo-co is a Fe7S9MoC-(R)-homocitrate cluster and has two biosynthetic precursors, NifB-co and L-cluster, of unknown structure and composition. The biosynthesis of FeMo-co is an enigmatic process that minimally requires NifB, NifEN, Fe-protein, MoO4 2- , (R)-homocitrate and S-adenolsylmethionine. A means to isolate the NifB enzyme for characterization has been developed through use of a GST-fusion tag. …
An Adhesive Vinyl-Acrylic Electrolyte And Electrode Binder For Lithium Batteries, Binh Tran
An Adhesive Vinyl-Acrylic Electrolyte And Electrode Binder For Lithium Batteries, Binh Tran
Electronic Theses and Dissertations
This dissertation describes a new vinyl-acrylic copolymer that displays great potential for applications in lithium ion batteries by enabling processes that are novel, faster, safer, and less costly than existing manufacturing methods. Overall, the works presented are based on tailored chemical synthesis directly applied to lithium ion battery manufacturing. Current manufacturing methods still have many flaws such as toxic processes and other time consuming if not costly steps. Understanding the chemistry of materials and processes related to battery manufacturing allows the design of techniques and methods that can ultimately improve the performance of existing batteries while reducing the cost. Chapter …
Trace Contaminant Control: An In-Depth Study Of A Silica-Titania Composite For Photocatalytic Remediation Of Closed-Environment Habitat Air, Janelle Coutts
Trace Contaminant Control: An In-Depth Study Of A Silica-Titania Composite For Photocatalytic Remediation Of Closed-Environment Habitat Air, Janelle Coutts
Electronic Theses and Dissertations
This collection of studies focuses on a PCO system for the oxidation of a model compound, ethanol, using an adsorption-enhanced silica-Ti02 composite (STC) as the photocatalyst; studies are aimed at addressing the optimization of various parameters including light source, humidity, temperature, and possible poisoning events for use as part of a system for gaseous trace-contaminant control system in closed-environment habitats. The first goal focused on distinguishing the effect of photon flux (i.e., photons per unit time reaching a surface) from that ofphoton energy (i.e., wavelength) of a photon source on the PCO of ethanol. Experiments were conducted in a bench-scale …
Investigation Of A Novel Magnesium And Acidified Ethanol System For The Degradation Of Persistent Organic Pollutants, Phillip Maloney
Investigation Of A Novel Magnesium And Acidified Ethanol System For The Degradation Of Persistent Organic Pollutants, Phillip Maloney
Electronic Theses and Dissertations
For centuries chemists have sought to improve humankind’s quality of life and address many of society’s most pressing needs through the development of chemical processes and synthesis of new compounds, often with phenomenal results. Unfortunately, there also are many examples where these chemicals have had unintended, detrimental consequences that are not apparent until years or decades after their initial use. There are numerous halogenated molecules in this category that are globally dispersed, resistant to natural degradation processes, bioaccumulative, and toxic to living organisms. Chemicals such as these are classified as persistent organic pollutants (POPs), and due to their negative environmental …
Mechanochemistry For Solid-State Syntheses And Catalysis, David Restrepo
Mechanochemistry For Solid-State Syntheses And Catalysis, David Restrepo
Electronic Theses and Dissertations
Traditional methods of synthesizing inorganic materials, such as hydrothermal, sol-gel, calcination and grinding steps, can typically require use of high temperatures, expensive precursors or use of solvents. Because of the energy-intensive nature or environmental impact these techniques, there is a push, especially from an industrial perspective, to move towards greener approaches. Mechanochemistry is a solvent-free alternative technique that can be used to synthesize a variety of materials under ambient conditions. Due to this, there is an increase in attention towards the use of this approach in both solid-state inorganic and organic chemistry. This dissertation reports the mechanochemical synthesis of a …
Solid Phase Extraction Room Temperature Fluorescence Spectroscopy For The Direct Quantification Of Monohydroxy Metabolites Of Polycyclic Aromatic Hydrocarbons In Urine Samples, Korina Jesusa Calimag
Solid Phase Extraction Room Temperature Fluorescence Spectroscopy For The Direct Quantification Of Monohydroxy Metabolites Of Polycyclic Aromatic Hydrocarbons In Urine Samples, Korina Jesusa Calimag
Electronic Theses and Dissertations
Polycyclic aromatic hydrocarbons (PAH) are important environmental pollutants generally formed during incomplete combustion of organic matter containing carbon and hydrogen. Introduced into the human body by adsorption through the skin, ingestion or inhalation, the biotransformation processes of PAH lead to the formation of multiple metabolites. Due to the short elimination lifetime from the body, the quantitative determination of monohydroxy-PAH (OH-PAH) in urine samples provides accurate information on recent exposure to environmental PAH. Urine analysis of OH-PAH with established methodology relies on sample clean-up and pre-concentration followed by chromatographic separation and quantification. Although chromatographic techniques provide reliable results in the analysis …
Remediation Of Polychlorinated Biphenyl (Pcb) Contaminated Building Materials Using Non-Metal And Activated Metal Treatment Systems, Tamra Legron-Rodriguez
Remediation Of Polychlorinated Biphenyl (Pcb) Contaminated Building Materials Using Non-Metal And Activated Metal Treatment Systems, Tamra Legron-Rodriguez
Electronic Theses and Dissertations
PCBs are recalcitrant compounds of no known natural origin that persist in the environment despite their ban by the United States Environmental Protection Agency in 1979 due to negative health effects. Transport of PCBs from elastic sealants into concrete, brick, and granite structures has resulted in the need for a technology capable of removing these PCBs from the materials. This research investigated the use of a nonmetal treatment system (NMTS) and an activated metal treatment system (AMTS) for the remediation and degradation of PCBs from concrete, brick, and granite affixed with PCB-laden caulking. The adsorption of PCBs onto the components …
Enhanced Two-Photon Absorption In A Squaraine-Fluorene-Squaraine Dye: Design, Synthesis, Photophysical Properties, And Solvatochromic Behavior, William Moreshead
Enhanced Two-Photon Absorption In A Squaraine-Fluorene-Squaraine Dye: Design, Synthesis, Photophysical Properties, And Solvatochromic Behavior, William Moreshead
Electronic Theses and Dissertations
The discovery of any new technology is usually accompanied by a need for new or improved materials which make that technology useful in practical applications. In the case of two-photon absorption (2PA) this has truly been the case. Since its first demonstration in 1961, there has been an ever increasing quest to understand the relationships between two-photon absorption and the structure of two-photon absorbing materials. This quest has been motivated by the many applications for 2PA which have been reported, including fluorescence bioimaging, 3D microfabrication, 3D optical data storage, upconverted lasing, and photodynamic therapy. The work presented in this dissertation …
Development Of Micro Volume Dna And Rna Profiling Assays To Identify The Donor And Tissue Source Of Origin Of Trace Forensic Biological Evidence, Brittany Morgan
Development Of Micro Volume Dna And Rna Profiling Assays To Identify The Donor And Tissue Source Of Origin Of Trace Forensic Biological Evidence, Brittany Morgan
Electronic Theses and Dissertations
In forensic casework analysis it is necessary to obtain genetic profiles from increasingly smaller amounts of biological material left behind by perpetrators of crime. The ability to obtain profiles from trace biological evidence is demonstrated with so-called ‘touch DNA evidence’ which is perceived to be the result of DNA obtained from shed skin cells transferred from donor to an object or person during physical contact. However, the current method of recovery of trace DNA involves cotton swabs or adhesive tape to sample an area of interest. This "blindswabbing" approach may result in the recovery of biological material from different individuals …
Squaraine Dyes, Design And Synthesis For Various Functional Materials Applications, Yuanwei Zhang
Squaraine Dyes, Design And Synthesis For Various Functional Materials Applications, Yuanwei Zhang
Electronic Theses and Dissertations
This dissertation contains the synthesis and characterization of squaraine based new functional materials. In the first part of this thesis work, a water soluble benzothiazolium squaraine dye was synthesized with pyridium pendents, and controlled aggregation properties were achieved. After formation of partially reversible J-aggregation on a polyelectrolyte (poly(acryl acid) sodium salt) template, the nonlinear, two-photon absorption cross section per repeat unit was found to be above 30-fold enhanced compared with nonaggregate and/or low aggregates. Using a similar strategy, sulfonate anions were introduced into the squaraine structure, and the resulting compounds exhibited good water solubilities. A ‘turn on’ fluorescence was discovered …
Electrochemical Studies Of Nanoscale Composite Materials As Electrodes In Direct Alcohol Fuel Cells, Jordan Anderson
Electrochemical Studies Of Nanoscale Composite Materials As Electrodes In Direct Alcohol Fuel Cells, Jordan Anderson
Electronic Theses and Dissertations
Polymer electrolyte membrane fuel cells (PEMFCs) have recently acquired much attention as alternatives to combustion engines for power conversion. The primary interest in fuel cell technology is the possibility of 60% power conversion efficiency as compared to the 30% maximum theoretical efficiency limited to combustion engines and turbines. Although originally conceived to work with hydrogen as a fuel, difficulties relating to hydrogen storage have prompted much effort in using other fuels. Small organic molecules such as alcohols and formic acid have shown promise as alternatives to hydrogen in PEMFCs due to their higher stability at ambient conditions. The drawbacks for …
Design, Synthesis, And Biological Evaluation Of Novel Polyamine Transport System Probes And Their Application To Human Cancers, Aaron Muth
Electronic Theses and Dissertations
The mammalian polyamine transport system (PTS) has been of interest due to its roles in cancer and maintaining cellular homeostasis. Polyamines are essential growth factors which are tightly controlled via a balance of biosynthesis, metabolism, import, and export. This work focused on the development and biological testing of polyamine transport probes to help understand the molecular requirements of the PTS. This was mediated through the use of a CHO (PTS active) and CHO-MG* (PTS deficient) screen, where compounds demonstrating high toxicity in CHO and low toxicity in CHO-MG* were considered PTS selective. The first chapter focused on the development of …