Organic Chemicals Commons^™

Imaging The Tumor Microenvironment Using 1,2-Dioxetane Chemiluminescence Agents, Lucas Ryan

Chemistry Theses and Dissertations

As complex organisms, animals and humans rely on a delicate interplay between many connected systems to maintain proper cellular and whole-body function. Oxygen regulation and homeostasis are vital for proper function in healthy cells, as are core components of aerobic metabolism and efficient ATP generation to supply our energy needs. Maintaining pH homeostasis is also of primary importance; cells maintain pH homeostasis through a host of active and passive transporters to maintain pH balance both inside and outside of the cell.

Events of uncontrolled cellular proliferation, also known as cancer, survive and thrive under conditions that perturb the delicate balance …

Design And Synthesis Of Novel No-Drug Hybrid Compound And Green Catalytic Activity Evaluation Of Synthesized Silver Nanoparticles-Halloysite Nanocomposite, Majed Abdullah Bajaber

University of New Orleans Theses and Dissertations

Acetaminophen is a well-known analgesic that can manage pain and reduce fever. SCP-1 is a derivative of acetaminophen that showed significantly reduced hepatotoxicity and nephrotoxicity comparative to acetaminophen. Nitric oxides have been well known to play a key role in a wide variety of physiological and pathophysiological important processes. It was therefore of interest to synthesize a nitric oxide donor linked to SCP-1 that could have enhanced analgesic and antipyretic activity. A furoxan CAS 1609 as NO-donor was synthesized and linked to SCP-1 successfully. The furoxan CAS 1609 was initially synthesized from tetronic acid to give 1,2- dioxime in 86 …

Ethoxylation And Polymerization Of Cardanol Derived Bifunctional Monomers, James Mgaya

Journal of Humanities and Social Sciences

Cardanol and its derivative; 3-(non-8-enyl)phenol (obtained by ethenolysis reaction of cardanol) were ethoxylated via one-pot reaction with urea and ethylene glycol using Na2CO3/ZnO as co-catalysts. The ethoxylates were later methoxycarbonylated using a 1,2-bis(ditertbutylphosphinomethyl)benzene (DTBPMB) modified palladium catalyst to produce ethoxylated bifunctional monomers. Polymerization of these monomers by heating in the presence of a standard polymerization catalyst, Ti(OBu)4, formed oligomers that were plastic-like. Analysis of these oligomers by MALDI-TOF MS indicated the condensation of up to nine monomer units.

Identification And Structural Characterization Functional Motifs In The Porphyromonas Gingivalis Mfa1 Short Fimbria., Mohammad K. Roky

Electronic Theses and Dissertations

Porphyromonas gingivalis is a causative agent of periodontal disease, initially colonizes the oral cavity by adhering to commensal streptococci. Adherence requires the interaction of the minor fimbrial protein (Mfa1) of P. gingivalis with streptococcal antigen I/II (Ag I/II). A peptide derived from Ag I/II peptide has been well characterized and shown to significantly reduce P. gingivalis colonization and bone loss in vivo, suggesting that this interaction represents a potential target for therapeutic intervention. However, the functional motifs of Mfa1 involved in the interaction with Ag I/II remain uncharacterized. A series of N- and C-terminal peptide fragments of Mfa1 were …

Antibacterial Efficacy Of Novel Eastern Medicine-Inspired Toothpastes Compared To Commercial Formulations, Joshua S. Goldfaden

Pacific Journal of Health

Toothpaste is an oral health care agent that dates back to the 5^th Century B.C. in East Asia. Following the conception of dentistry in the 7^th Century B.C. and the field’s subsequent growth, the embodiment of toothpaste has evolved from containing natural substances such as tea leaves to abrasive chemicals, particularly: fluoride, triclosan, and sodium lauryl sulfate (SLS). Regarding how each respective reagent functions, fluoride forms a complex with calcium ions in the teeth to prevent erosion of the protective enamel coating. This ion also disrupts metabolic activities of Streptococcus mutans (S. mutans), which are the …

Nature-Inspired Electrode Materials For Next Generation Sustainable Energy Storage, Mikhail Miroshnikov

Dissertations, Theses, and Capstone Projects

Despite revolutionizing the world of portable electronics, the contemporary lithium-ion battery (LIB) suffers from challenges associated with the cost, safety, and environmental impact of transition metal oxide-based intercalation cathodes. To alleviate these issues, naturally occurring organic molecules may serve as sustainable alternatives to traditional inorganic cathode materials. The electrochemical properties of organic compounds are derived from redox-active functional groups containing oxygen, nitrogen and sulfur. Additionally, these functional groups are capable of coordinating metal ions beyond lithium, allowing for compatibility with sodium-ion batteries (SIBs) and other earth abundant metal-based energy storage systems. However, despite competitive performance against commercialized cathode materials, much …

Fluorometric Characterization Of A Methylene Blue Derivative Sensitive To Reactive Oxygen Species (Ros), Matthew Weeks

Honors Theses

Methylene blue (MB) has many uses within both microbiology and pharmacology. MB can treat disorders such as methemoglobinemia, malaria, Alzheimer’s disease, and certain forms of cancer. MB is also useful for molecular imaging due to its off-on fluorescent capabilities. MB derivatives with a urea bond at the 10-N position have been cleavable by triggers such as light. However, I was interested in sensitivity to reactive oxygen species (ROS). In this study, I wanted to determine if the MB derivative MB-EA exhibited sensitivity to ROS. MB-EA was exposed to varying concentrations of hydrogen peroxide and MB release was measured. I concluded …

Synthesis And Characterization Of Pamam-Fatty Acid “Janus-Type” Dendritic Hybrids For Biomedical Applications, Abigail Grace Barker

Honors Theses

Janus dendrimers are amphiphilic macromolecules that have shown promising potential in the biomedical field. Due to their unique structure and properties, these branched block copolymers have the ability to self-assemble into bioinspired spherical nanoaggregates. Because they possess a hydrophobic and hydrophilic moiety, these aggregates show potential as drug delivery systems that can transport both hydrophobic and hydrophilic drugs. However, many of the proposed dendrimer systems suffer from certain weaknesses that hinder their practical usage as clinical treatment options. Some of these shortcomings include specificity, solubility, size, surface charge, and mechanical properties. To combat these problems, we synthesized and characterized a …

The Effects Of Alpha-Tocopherol And Ascorbic Acid On Metastatic Breast Cancer Cells, Scout Treadwell

Honors Theses

Breast cancer is a multifaceted, complex disease that affects hundreds of thousands of patients every year. Although there has a been a decline in the mortality rate of this disease, it is still vital to investigate and discover new possible treatments. One area of research involves the generation of reactive oxygen species (ROS) in cancer cells and the possibility of ROS-induced apoptosis. Antioxidants such as Vitamin C and Vitamin E have been shown to serve as pro-oxidants. Instead of detoxifying the cell from damaging ROS, these compounds can stimulate ROS production, triggering an apoptotic cascade in the cell. In this …

Synthesis Of Pharmaceutical And Personal Care Products And Pesticide Metabolites Of Environmental Concern, Isaiah Edwards

Honors Theses

Human pollution of aquatic environments by introduction of pharmaceutical and personal care products (PPCPs) as well as agrichemicals presents a grave threat to the health of aquatic organisms. Many of these chemicals not only exhibit toxicity to the species of complex ecosystems at various levels but also undergo metabolic transformation into moieties that have different and sometimes more potent physiochemical profiles. PPCP and pesticides as well as their metabolites impact organisms via a number of different mechanisms, with the most serious arguably being endocrine disruption. Two emerging pollutants, gemfibrozil and bifenthrin, possess naturally occurring metabolites that were determined to warrant …

Effects Of Nicotinamide Riboside And Beta-Hydroxybutyrate On C. Elegans Lifespan, Jeffery Peters

Undergraduate Honors Theses

The nicotinamide riboside (NR) form of vitamin B₃and the ketone body ß-hydroxybutyrate (BHB) are two of the most promising natural compounds yet identified for the treatment of aging and aging-related diseases. Forms of vitamin B₃are precursors for the synthesis of the coenzymes nicotinamide adenine dinucleotide (NAD(H)) and nicotinamide adenine dinucleotide phosphate (NADP(H)). In aged cells levels of NAD⁺decline, decreasing metabolism and decreasing activity of protective sirtuin protein deacetylases. In aged cells NR, but not more common forms of vitamin B3, boost NAD⁺levels. BHB is naturally produced by the body when individuals fast …

Case Report: An Isolated Dematologic Reaction To Isosulfan Blue Dye After Lumpectomy, Micaela Moen Md, Aaron Pinnola, M Pahlkotter

General Surgery

P 154. CASE REPORT: AN ISOLATED DERMATOLOGIC REACTION TO ISOSULFAN BLUE DYE AFTER LUMPECTOMY Presenter: Micaela Moen MD | Grand Strand Medical Center Moen MR, Pahlkotter M, Nicholson G, Pinnola A Introduction: The use of isosulfan blue dye for sentinel lymph node mapping in breast cancer is considered routine (1). An array of adverse side effects from this dye have been described in the literature (2-3). Here we describe an atypical isolated dermatologic reaction. A 79 year old female with history of hypothyroidism, GERD, hypercholesterolemia, iron deficiency anemia who was found to have infiltrating ductal carinoma after a core biopsy …

The Nuclear Legacy In Appalachia, Michele Morrone, Harold Perkins

Journal of Appalachian Health

Nestled in the rolling hills of Appalachia Ohio is a reminder of the role that the region played in winning the Cold War. For more than 40 years in rural Pike County, the 3,700-acre Portsmouth Gaseous Diffusion Plant (PORTS), or the “A-Plant” as the locals refer to it, enriched uranium for use in nuclear weapons. While the facility produced nuclear fuel for national security, it simultaneously exposed plant workers to chemicals and radiation and discharged pollution into the surrounding community. The A-Plant is now being demolished and the site repurposed. However, the site continues to affect the community as, for …

Silver Salt-Mediate Benzylation Of Carbohydrates Under Mildly Acidic Conditions, Nicholas Forsythe, Samira Escopy, Yashapal Singh 2436808, Alexei Demchenko

Undergraduate Research Symposium

When looking at biomolecules, carbohydrate represent a large group of macromolecules that play an important role in the body. Most importantly, carbohydrates provide an energy supply for organisms, but it is proven that they are also involved in a myriad of other processes. Furthermore, synthesizing these molecules leads to advancements in chemistry, such as drug design, and other structures such as glycolipids play important roles in the immune system. Understanding this, an efficient and reliable way to create these carbohydrates is needed.

The protection and deprotection manipulations of carbohydrates play an essential role in synthetic carbohydrate chemistry.¹ Using benzyl …

Correlating The Physicochemical Properties Of Magnesium Stearate With Tablet Dissolution And Lubrication, Julie L. Calahan

Theses and Dissertations--Pharmacy

Magnesium stearate (MgSt) is the most commonly used pharmaceutical excipient and is present in over half the tablet formulations on the market. In spite of its popularity as an effective lubricant, it has been repeatedly recognized that there is significant variability between MgSt samples, which can cause inconsistent lubrication between batches of MgSt. The hypothesis of this research is that the batch-to-batch variability in tablet lubrication and dissolution observed in tablet formulations containing different MgSt samples can be correlated with differences in MgSt physicochemical properties (fatty acid salt composition, crystal hydrate form, particle size and surface area). Developing correlations between …

Determining The Antibacterial Activity And Mode Of Action Of Tirandamycin, Hailey Bouchard

CMC Senior Theses

Tirandamycin is a small molecule natural product that has been isolated from various species of marine and terrestrial Streptomyces. The natural product has shown antibacterial activity against an array of Gram-positive and Gram-negative bacteria, showing promise as a pharmaceutical drug. Tirandamycin has 14 known derivatives, many of which have been created synthetically. Some of its derivatives are particularly potent against the high-risk bacteria vancomycin-resistant Enterococcus faecium, Staphylococcus aureus, Streptococcus agalactiae, Streptococcus pneumoniae and Escherichia coli. However, the antibacterial potency of these derivatives has not been tested systematically leading to the possibility of discovering more potent …

Organic Compound Farnesol Reduces Disease Severity And Onset In Mouse Model Of Multiple Sclerosis, Lacey B. Sell

EWU Masters Thesis Collection

No abstract provided.