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Articles 181 - 210 of 1157
Full-Text Articles in Physical Sciences and Mathematics
Chemistry In Art: The Science Of Dye, Madeleine Gray Burland
Chemistry In Art: The Science Of Dye, Madeleine Gray Burland
Honors Projects
Fabric arts, and the practice of dyeing fabric using various resist techniques, is a tradition that goes back centuries, and is unique among art mediums in its relation to science, as the innovations in dye production have directly affected the art form. The development of synthetic dyes in the 1800’s greatly affected the way fabric is dyed, and subsequently the way clothes were made and consumed. As opposed to dyes made of natural materials, synthetic dyes cam in more colors, were brighter, easier to make in large quantities, and lasted longer since they didn’t fade with repeated washings. The practice …
Approaches Towards The Synthesis Of Ketamine Metabolites, Ann K. Patrick
Approaches Towards The Synthesis Of Ketamine Metabolites, Ann K. Patrick
Honors Theses
Major Depressive disorder (MDD) plagues society and stands at the forefront of research as MDD affects approximately 16% of the population. Pharmaceutical drugs, including the selective serotonin reuptake inhibitors (SSRIs), have been used for MDD treatment and remain a popular option today. However, current antidepressant treatments have proven to be ineffective in just less than half of the patients. Research continues with the goal to better understand the mechanisms of the pathology of depression and to search for other treatment options. For example, the stress-neurogenesis hypothesis investigates the role of stress and decreased neuroplasticity within MDD.
Supporting the stress-neurogenesis hypothesis, …
Surface-Enhanced Raman Spectroscopy For Cocaine Detection, Kiersten Jo Mead
Surface-Enhanced Raman Spectroscopy For Cocaine Detection, Kiersten Jo Mead
Chemistry
The detection of drugs of abuse using Raman spectroscopy is of particular interest to forensic researchers at the moment. Raman spectroscopy is highly specific, fast, non-destructive, and can be adapted for in-situ measurements, making it the ideal forensic technique. Researchers working under the guidance of Doctor Igor Lednev have been able to use UV resonance Raman spectroscopy to detect cocaine in oral fluid without the need for sample pretreatment. They were however unable to detect the cocaine at forensically relevant levels. To overcome this limitation, surface-enhanced Raman spectroscopy (SERS) was used in this proof of concept study for the detection …
Determining Donor Age Through Blood Analysis Using Attenuated Total Reflection Fourier Transform-Infrared (Atr Ft-Ir) Spectroscopy For Forensic Purposes, Samantha Leigh Giuliano
Determining Donor Age Through Blood Analysis Using Attenuated Total Reflection Fourier Transform-Infrared (Atr Ft-Ir) Spectroscopy For Forensic Purposes, Samantha Leigh Giuliano
Legacy Theses & Dissertations (2009 - 2024)
Chapter 1 of this thesis is an overview of the use of attenuated total reflection Fourier transform-infrared (ATR FT-IR) spectroscopy in industry and for examination of body fluids with emphasizes on examination of blood. It covers recent developments for analysis of samples with ATR FT-IR spectroscopy for forensic purposes.
Towards The Development Of Low-Cost And Easily-Deployable Sensing Platforms For Phosphate, Maureen Pontarelli, Thomas Koch
Towards The Development Of Low-Cost And Easily-Deployable Sensing Platforms For Phosphate, Maureen Pontarelli, Thomas Koch
Chemistry & Biochemistry Student Scholarship
Maureen Pontarelli ’20
Major: Chemistry
Thomas Koch '20
Major: Biochemistry
Faculty Mentor: Dr. John Breen, Chemistry and Biochemistry
Exploration Of K2 Mycobacteriophages With Bred, Colby Agostino, Olivia Schmitt
Exploration Of K2 Mycobacteriophages With Bred, Colby Agostino, Olivia Schmitt
Chemistry & Biochemistry Student Scholarship
Colby Agostino ’22
Major: Biochemistry and Computer Science
Olivia Schmitt ’22
Major: Biochemistry
Faculty Mentor: Dr. Kathleen A. Cornely, Chemistry and Biochemistry
ZoeJ and Marcoliusprime are mycobacteriophage capable of infecting tuberculosis causing bacteria via the lytic and lysogenic cycles. The lytic cycle is the form of viral replication that results in cell death. Lysogeny involves phage DNA being integrated with the DNA of the host cell and preserved through binary fission. However, the bacteria causing tuberculosis do not die in the lysogenic phase. This research project will involve creating mutants of ZoeJ and Marcoliusprime that will not contain the genes …
Mycobacteriophage Morphology As A Diagnostic For Cluster Assignment, Ethan Dionne
Mycobacteriophage Morphology As A Diagnostic For Cluster Assignment, Ethan Dionne
Chemistry & Biochemistry Student Scholarship
Major: Biochemistry
Faculty Mentor: Dr. Kathleen A. Cornely, Chemistry and Biochemistry
Phages are viral bodies that infect bacterial hosts, and have shown promising applications as alternatives to antibiotics for the treatment of bacterial infections. This project examines the morphology of siphoviridae mycobacteriophage, which have long, flexible, non-contractile tails as well as the characteristic head, called a capsid. Using electron microscopy photos of sequenced phages, tail length and capsid diameter were measured and compared to further characterize morphological relationships between genetically distinct phages. The data presented has the potential to work as a diagnostic tool to classify unsequenced phages to genetically …
Breakthroughs In Obtaining Qm/Mm Free Energies, Phillip S. Hudson
Breakthroughs In Obtaining Qm/Mm Free Energies, Phillip S. Hudson
USF Tampa Graduate Theses and Dissertations
The computation of free energy is pivotal to understanding the fundamental nature of chemical phenomena. That is, whether a specific molecular outcome occurs spontaneously or is inherently unfavorable. The need to do this with consistent accuracy begs for the use of quantum mechanical (QM) methods. However, techniques for directly computing free energy differences with QM or mixed QM/MM methods are untenable, as the computational expense is quite exorbitant. At present, the most feasible approach for obtaining QM/MM free energies is employing the so-called indirect cycle, which relies on accurately computing free energy differences between low (e.g., molecular mechanical, MM) and …
Research And Review Of Polymethyl-Methacrylate Copolymers In The Development Of Enhanced Pharmaceutical Delivery Systems, Jake Dyess
Senior Honors Theses
The following thesis shall primarily explore the current research regarding the implementation of modifiable microscopic and nanoscopic polymer particles as novel pharmaceutical delivery systems. Polymethacrylate-based copolymers, such as EudragitTM, are sensitive to alterations in pH levels, becoming increasingly more soluble in response to an increase in pH. The selective solubility and modifiable nature of these polymers allows for greater flexibility of treatment options for patients (Patra et al., 2017). The wide range of functionality of polymethacrylate (PMA) may provide solutions to challenges relating to the current treatment and therapy of certain conditions. Research indicates that PMA based micro- …
Computation Of Atmospheric Concentrations Of Molecular Clusters From Ab Initio Thermochemistry, Tuguldur T. Odbadrakh, Ariel G. Gale, Benjamin T. Ball, Berhane Temelso, George C. Shields
Computation Of Atmospheric Concentrations Of Molecular Clusters From Ab Initio Thermochemistry, Tuguldur T. Odbadrakh, Ariel G. Gale, Benjamin T. Ball, Berhane Temelso, George C. Shields
Chemistry Publications
The computational study of the formation and growth of atmospheric aerosols requires an accurate Gibbs free energy surface, which can be obtained from gas phase electronic structure and vibrational frequency calculations. These quantities are valid for those atmospheric clusters whose geometries correspond to a minimum on their potential energy surfaces. The Gibbs free energy of the minimum energy structure can be used to predict atmospheric concentrations of the cluster under a variety of conditions such as temperature and pressure. We present a computationally inexpensive procedure built on a genetic algorithm-based configurational sampling followed by a series of increasingly accurate screening …
Periodic Table Club, Makayla Gill, Kailynn Jensen
Periodic Table Club, Makayla Gill, Kailynn Jensen
Honors Expanded Learning Clubs
This club is dedicated to teaching the generation of future scientists the periodic table. This is designed to be a unique take on a STEM club that uses the periodic table as a backbone for a solid foundation in chemistry.
Comparative Analysis Of The Human Serine Hydrolase Ovca2 To The Model Serine Hydrolase Homolog Fsh1 From S. Cerevisiae, Jessica S. Bun, Michael D. Slack, Daniel E. Schemenauer, R. Jeremy Johnson
Comparative Analysis Of The Human Serine Hydrolase Ovca2 To The Model Serine Hydrolase Homolog Fsh1 From S. Cerevisiae, Jessica S. Bun, Michael D. Slack, Daniel E. Schemenauer, R. Jeremy Johnson
Scholarship and Professional Work - LAS
Over 100 metabolic serine hydrolases are present in humans with confirmed functions in metabolism, immune response, and neurotransmission. Among potentially clinically relevant but uncharacterized human serine hydrolases is OVCA2, a serine hydrolase that has been linked with a variety of cancer-related processes. Herein, we developed a heterologous expression system for OVCA2 and determined the comprehensive substrate specificity of OVCA2 against two ester substrate libraries. Based on this analysis, OVCA2 was confirmed as a serine hydrolase with a strong preference for long-chain alkyl ester substrates (>10-carbons) and high selectivity against a variety of short, branched, and substituted esters. Substitutional analysis …
Majestic - Prappe Metals Data, Brian Majestic
Majestic - Prappe Metals Data, Brian Majestic
Chemistry and Biochemistry: Data Sets
No abstract provided.
New Innovation In The Flipped Chemistry Classroom
New Innovation In The Flipped Chemistry Classroom
The Graduate Review
No abstract provided.
Paradigms For Creating Activities That Integrate Mathematics And Science Topics, Janet Bowers, Kathy Williams, Antoni Luque, Devon Quick, Mary Beisiegel, Jody Sorensen, Joan Kunz, Diane Smith, Lori Kayes
Paradigms For Creating Activities That Integrate Mathematics And Science Topics, Janet Bowers, Kathy Williams, Antoni Luque, Devon Quick, Mary Beisiegel, Jody Sorensen, Joan Kunz, Diane Smith, Lori Kayes
Journal of Mathematics and Science: Collaborative Explorations
Research has shown that undergraduate students benefit from seeing examples of mathematics applied to real-world situations. This article describes three different paradigms for how math and discipline partner faculty worked together to create mathematical activities that illustrate applications of the topics being studied in precalculus and calculus. All three examples are discussed within the framework of PDSA cycles to describe the process by which the teams collaborated to plan, enact, study, and refine their lessons. Findings discuss both the difficulties of creating integrated activities (differences in terms and definitions between math and science faculty, different foregrounding of math versus science …
General Chemistry Students' Perceived Self-Efficacy After Completing Project-Based Service-Learning Activities, Sarah Quast Sliker
General Chemistry Students' Perceived Self-Efficacy After Completing Project-Based Service-Learning Activities, Sarah Quast Sliker
Walden Dissertations and Doctoral Studies
A New England community college reported that 60% of General Chemistry college students, who were science, technology, engineering, and mathematics (STEM) majors, did not advance in the STEM curriculum. To potentially increase student persistence in STEM curriculum, this qualitative case study project explored the self-efficacy perceptions of General Chemistry students after participating in project-based service-learning with elementary-school students. Bandura's social cognitive theory provided the conceptual framework for the study, supporting an understanding of learner self-efficacy. Research questions focused on chemistry students perceived self-efficacy after interactions with elementary-school students, teamwork, and the development of a project. Semistructured interviews with 10 participants …
An Investigation Into The History, Science, And Future Of Dental Filling Materials, Natalia Kaczor
An Investigation Into The History, Science, And Future Of Dental Filling Materials, Natalia Kaczor
Honors Theses
No abstract provided.
A Model Experiment To Investigate The Possibility Of Glyphosate Contamination In St. Kitts And Nevis, Winston Fu
A Model Experiment To Investigate The Possibility Of Glyphosate Contamination In St. Kitts And Nevis, Winston Fu
Honors Undergraduate Theses
Glyphosate is a broad-spectrum herbicide that is used globally to combat the spread of weeds among crops. Not all countries around the world have been using the herbicide. For example, island countries such as Dominica and St. Kitts and Nevis do not use the herbicide on their crops. However, St. Kitts and Nevis imports food and other agricultural products from around the world, leading to the hypothesis that glyphosate is contaminating the soil through those imported products. The aim of this research project was to determine if glyphosate is present in the island country of St. Kitts and Nevis. A …
Green Chemistry: The Oxidation Of Benzaldehyde Using Atmospheric Oxygen And N-Heterocyclic Carbenes As Catalysts, Alex Brody, John Morgan
Green Chemistry: The Oxidation Of Benzaldehyde Using Atmospheric Oxygen And N-Heterocyclic Carbenes As Catalysts, Alex Brody, John Morgan
Student Research Poster Presentations 2020
Oxidation is a vital process in organic and biochemical reactions. In particular, the oxidation of aromatic aldehydes to carboxylic acids and esters is a vital process used in many different environments. Benzaldehyde is one common subject of this type of reaction, used in the synthesis of benzoic acid and benzoate derivatives. Unfortunately, the industrial synthesis of these compounds uses harmful heavy metal oxidants such as Chromium(VI) and Manganese(VII), which are very harmful to the environment. We proposed to eliminate these pollutants by using atmospheric oxygen and an organic catalyst in a solvent free reaction. This reaction would then be microwaved …
Chemistry In Medicine, Olivia Visaggio, Alyssa Bondi, Matthew Gillingham, Hailey Loughlin
Chemistry In Medicine, Olivia Visaggio, Alyssa Bondi, Matthew Gillingham, Hailey Loughlin
Student Research Poster Presentations 2020
The chemistry behind medicine is important and necessary to study many different drugs and their effects. In this project, we focused on the chemical composition and mechanisms of various drugs. The drugs we focused on include Opioids, NSAIDs, and other medications, such as Benzodiazepines and antibiotics. For each drug, we provided its structure as well as the functional groups, which include a part of a molecule that is recognized based on its arrangement of atoms. Organic Chemistry provides individuals with an understanding of various organic compounds, and this field of study is important as it explains the ways in which …
Synthesis Of Bio-Based Polymer Products, Joshua Sukie
Synthesis Of Bio-Based Polymer Products, Joshua Sukie
Williams Honors College, Honors Research Projects
The project covers the synthesis of two bio-based polymers. One aspect of the research investigates the synthesis of materials for use in vegetable oil-based UV-curable coating, and the subsequent polymerization of the materials into a coating film. The second aspect of the research follows the synthesis of a functionalized cellulose material for use as a reinforcer in a vegetable oil-based composite. Both products are subsequently analyzed by various methods.
Electrolytic Oxidative Coupling Of Alcohols With Aldehydes To Form Esters, Katherine L. Verboom
Electrolytic Oxidative Coupling Of Alcohols With Aldehydes To Form Esters, Katherine L. Verboom
Honors College Theses
There are copious amounts of naturally occurring and synthetic esters known that have a wide range of applications in industry to produce fine chemicals. Traditional methods of ester synthesis involve a reaction between a carboxylic acid and an alcohol in the presence of a Bronsted acid catalyst. The primary objective of this research project was to carry out the ester synthesis using the electrochemical coupling of aldehydes with alcohols instead of with a Bronsted acid catalyst because the electrochemical coupling would be an all-around better alternative of ester synthesis than the traditional method of using the catalyst. Electrochemistry has long …
Development Of Tetrathiafulvalene Fused N-Heterocyclic Carbene Compounds, William J. Robinson Iii
Development Of Tetrathiafulvalene Fused N-Heterocyclic Carbene Compounds, William J. Robinson Iii
Browse all Theses and Dissertations
Separately, N-Heterocyclic carbene and Tetrathiafulvalene compounds show great promise for a variety of applications. N-heterocyclic carbenes exhibit desirable metal bonding characteristics which allow for modulation of the metal center via back-bonding interactions. Additionally, this creates a system of increased bonding strength creating stable complexes. Tetrathiafulvalene exhibits strong redox-active and optical characteristics. These are owed to an increased aromaticity as oxidation of the compound occurs and thus, is stable through a multitude of oxidative states. The marriage of these two functionalization creates a unique opportunity for a “cure-all” compound, able to address many problems the world faces today including, but not …
Characterization Of O-Linked Glycosylated Neuropeptides In The American Lobster (Homarus Americanus): The Use Of Peptide Labeling Following Beta Elimination, Edward Myron Bull
Characterization Of O-Linked Glycosylated Neuropeptides In The American Lobster (Homarus Americanus): The Use Of Peptide Labeling Following Beta Elimination, Edward Myron Bull
Honors Projects
Neuropeptides are a class of small peptides that govern various neurological functions, and the American lobster (Homarus americanus) provides a model system for their characterization. Neuropeptides are commonly post-translationally modified (PTM), and one common PTM is glycosylation. Past research in the Stemmler lab has found glycosylated neuropeptides in H. americanus; however, the extent and biological role of this modification has not been well characterized. This study was undertaken to determine the number of glycosylated peptides in the sinus glands of H. americanus and to develop an approach to tag the site of glycosylation using beta-elimination chemistry. LC-MS …
Cholinesterase Based System For Fentanyl Detection, Alyssa Shoemaker
Cholinesterase Based System For Fentanyl Detection, Alyssa Shoemaker
Legacy Theses & Dissertations (2009 - 2024)
Opioids and other illicit drugs have become a very prevalent problem across the world, especially in the United States. In fact, every day more than 130 people die from an opioid overdose. Despite many public warnings explaining the risks of opioid and drug use, the epidemic has continued to grow. As illicit drugs are becoming more rampant in society, law enforcement officers need a reliable, rapid, and non-invasive method to detects when someone may be on drugs, for example while driving, and to assess unknown powders or substances when presented at a crime scene containing drugs. Currently, at traffic stops …
Displacement Using Fentanyl And Bullet Analysis Using Atomic Absorption Spectroscopy, Henry Hance
Displacement Using Fentanyl And Bullet Analysis Using Atomic Absorption Spectroscopy, Henry Hance
Legacy Theses & Dissertations (2009 - 2024)
Opioids are substances that bind to opioid receptors in the central nervous system and can be endogenous, naturally occurring opium alkaloids derived from opium poppy or semi-synthetic and or synthetic compounds.1 Fentanyl is a synthetic opioid that has flooded the US market in the last decade. Synthetic opioid deaths increased by 100% from 2015 to 2016.2 The synthetic opioid is still used to treat severe chronic pain and during surgeries as an anesthetic, but has flooded the black market through illegal means. Fentanyl is prescribed in the forms of patches and lozenges, but can be abused and illegal sold in …
Optimal Excitation Wavelength For Raman Spectroscopic Analysis Of Organic Gunshot Residue Evidence, Ashley Hull
Optimal Excitation Wavelength For Raman Spectroscopic Analysis Of Organic Gunshot Residue Evidence, Ashley Hull
Legacy Theses & Dissertations (2009 - 2024)
Gunshot residue (GSR) is a type of trace evidence that can often be recovered at violent crime scenes. There are two major types of GSR, organic gunshot residue (OGSR), and inorganic gunshot residue (IGSR). Traditional forensic analysis of GSR focuses on IGSR, although with the movement towards lead-free, or non-toxic ammunition, IGSR analysis has become less informative, as lead is a major component of IGSR analysis. Because of this, OGSR has been investigated to supplement the standard IGSR analysis methods. Previous work has shown Raman spectroscopy to be effective at identifying OGSR as well as a minimally destructive and specific …
Targeting Oncogenic K-Ras And Monoamine Oxidase B Utilizing Chalcones Bearing The 3,4,5-Trimethoxyphenyl Motif, Cody Fourman
Targeting Oncogenic K-Ras And Monoamine Oxidase B Utilizing Chalcones Bearing The 3,4,5-Trimethoxyphenyl Motif, Cody Fourman
Browse all Theses and Dissertations
Oncogenic K-Ras is a driver protein found in specific cancers and was once thought to be “undruggable.” However, recent advances have suggested that mislocalizing K-Ras from the plasma membrane could be a viable strategy to target these cancers. The objective of this project was to identify a lead compound and determine a structure-activity relationship from chalcones bearing the 3,4,5-trimethoxy motif towards oncogenic K-Ras and MAO-B. This was accomplished by keeping the trimethoxy group consistent on one ring while varying the electron-donating or -withdrawing groups on the opposite ring. Previous work showed chalcones of this specific archetype exhibiting indiscriminate MAO inhibition, …
Investigating Heterogeneous Nucleation Of Barite Using Hydrothermal Atomic Force Microscopy And Optical Microscopy, Ankita B. Gurav
Investigating Heterogeneous Nucleation Of Barite Using Hydrothermal Atomic Force Microscopy And Optical Microscopy, Ankita B. Gurav
Browse all Theses and Dissertations
In order to develop a better understanding heterogeneous nucleation of barite, barite precipitation was studied under varying experimental parameters. Hydrothermal atomic force microscopy (HAFM) and optical microscopy were used to investigate the effect of change in temperature, supersaturation and varying ratios of ions on heterogeneous nucleation of barite. In the experiments conducted at higher temperatures, the particles thus nucleated were found to display characteristic hexagonal and rhomboidal shapes. In comparing results of particle densities among different ion ratios, there is evidence suggesting that barium to sulfate ratio plays a role of promoter. Wherein, the ratios with higher [Ba2+] concentration were …
Exploring The Multiplex Detection Capabilities Of Raman Spectroscopy On Mock Street Samples Containing Illicitly Manufactured Fentanyls, Mia Laverne Williams Burnett
Exploring The Multiplex Detection Capabilities Of Raman Spectroscopy On Mock Street Samples Containing Illicitly Manufactured Fentanyls, Mia Laverne Williams Burnett
Browse all Theses and Dissertations
Illicitly manufactured fentanyls (IMFs) have become a global and local epidemic and have recently caused an increase in the number of accidental exposures and overdoses in first responders and the community. The aim of the research is to explore a method to discriminate between IMFs and cutting agents in mock street samples using Raman Spectroscopy. Predominant Raman bands corresponding to the structural moieties of each individual illicit, licit drugs, and cutting agents were tracked, then used to discriminate between varying components in a mock street sample. In conclusion, discrimination between the components in the mixture was obtained using Raman Spectroscopy. …