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Articles 31 - 60 of 87
Full-Text Articles in Physical Sciences and Mathematics
Paleokarst Coastal Caves At Torricelle Hills (Lessini Mountains, Venetian Prealps, Italy), Guido Gonzato, Enrico Borghi, Roberto Chignola, Nereo Preto, Guido Rossi
Paleokarst Coastal Caves At Torricelle Hills (Lessini Mountains, Venetian Prealps, Italy), Guido Gonzato, Enrico Borghi, Roberto Chignola, Nereo Preto, Guido Rossi
International Journal of Speleology
This paper describes a set of paleokarst caves at Torricelle Hills near Verona (Southern Alps, Italy.) At this locality, erosional surfaces and paleokarst cavities show that sedimentation of late Paleogene neritic limestones was interrupted by subaerial exposure. Karst features developed during a phase of marine regression that started after the early Oligocene and ended in the mid Miocene. These caves were originally completely filled by iron oxides- and hydrated oxides-rich paleosol sediments (ochre) that, for centuries, have been mined for pigments. Mining activity emptied the caves, leaving the voids and related shapes mostly intact; as a result, the original morphologies …
Development Of Antiviral Peptidomimetics, Songyi Xue
Development Of Antiviral Peptidomimetics, Songyi Xue
USF Tampa Graduate Theses and Dissertations
Protein-protein interactions (PPIs) are essential for biological processes and are associated with a number of diseases, including cancer, infectious diseases, and neurodegenerative diseases. As a result, modulation of PPIs has been recognized as one of the most promising strategies to develop the novel drugs. Peptide modulators always exhibit higher specificity and affinities with targets than small compounds or monoclonal antibodies, but their broad medicinal effectiveness is constrained by their poor bioavailability and biostability. Peptidomimetics, which have been developed to mimic the structure as well as function of bioactive peptides and proteins, have shown excellent potential in protein surface mimicry and …
An Attempt To Identify Source Areas Of Clastic Deposits From Selected Caves Of The Prokletije Mountains (Montenegro): A Mineralogical And U-Series Geochemistry Approach, Ditta Kicińska, Jacek Pawlak, Jacek Stienss
An Attempt To Identify Source Areas Of Clastic Deposits From Selected Caves Of The Prokletije Mountains (Montenegro): A Mineralogical And U-Series Geochemistry Approach, Ditta Kicińska, Jacek Pawlak, Jacek Stienss
International Journal of Speleology
The Prokletije Mountains/Albanian Alps are the highest part of the Dinaric Mountains. Paradoxically, these mountains and their cave areas remain among the most enigmatic in Europe, having only recently become subjects of scientific research and cave exploration. This paper focuses on the Kolata and Greben massifs, where the highest, and thus the oldest, cave systems are located. Through the analysis of heavy mineral composition, the apatite-tourmaline index, and cluster analysis for mineralogical composition and uranium isotopic data, it becomes possible to identify the source areas for the cave clastic deposits. It also allow to distinguish multiple paleoflow directions, each corresponding …
Bibliometric Analysis Of Sustainability In Gastronomy Research, Nihan Akdemir, Bilsen Bilgili
Bibliometric Analysis Of Sustainability In Gastronomy Research, Nihan Akdemir, Bilsen Bilgili
University of South Florida (USF) M3 Publishing
Sustainability can be called the ability to be permanent. The economic, social and ecological dimensions of sustainability are important in terms of gastronomy. The rapid development of gastronomy in recent years has led many studies in literature to discuss gastronomy from different perspectives. The aim of this study is to reveal the development of national and international research on sustainability in gastronomy over the years with bibliometric analysis. In this context, Web of Science (WOS) and ULAKBIM TR-Dizin databases were examined in the analysis of the data until February 2023. For this purpose, articles were selected from the relevant sources …
Predictive Modeling Of Cave Entrance Locations: Relationships Between Surface And Subsurface Morphology, William Blitch, Adia R. Sovie, Benjamin W. Tobin
Predictive Modeling Of Cave Entrance Locations: Relationships Between Surface And Subsurface Morphology, William Blitch, Adia R. Sovie, Benjamin W. Tobin
International Journal of Speleology
Cave entrances directly connect the surface and subsurface geomorphology in karst landscapes. Understanding the spatial distribution of these features can help identify areas on the landscape that are critical to flow in the karst groundwater system. Sinkholes and springs are major locations of inflow and outflow from the groundwater system, respectively, however not all sinkholes and springs are equally connected to the main conduit system. Predicting where on the landscape zones of high connectivity exist is a challenge because cave entrances are difficult to detect and imperfectly documented. Wildlife research has a similar issue of understanding the complexities of where …
An Introduction To The Algebra Revolution, Art Bardige
An Introduction To The Algebra Revolution, Art Bardige
Numeracy
Bardige, Art. 2022. The Algebra Revolution: How Spreadsheets Eliminate Algebra 1 to Transform Education; (Bookbaby) 135 pp. UNSPSC 55111505.
The Algebra Revolution: How Spreadsheets Eliminate Algebra 1 to Transform Education argues that Algebra 1 can be eliminated by teaching mathematics through spreadsheets. Such a change would eliminate the greatest roadblock to student achievement.
Bite-Sized Quantitative Reasoning Essays: A Review Of Numbers Don’T Lie: 71 Stories To Help Us Understand The Modern World (2020), By Vaclav Smil, Samuel L. Tunstall
Bite-Sized Quantitative Reasoning Essays: A Review Of Numbers Don’T Lie: 71 Stories To Help Us Understand The Modern World (2020), By Vaclav Smil, Samuel L. Tunstall
Numeracy
In Numbers Don’t Lie: 71 Stories to Help Us Understand the Modern World (2020), Vaclav Smil draws on his interdisciplinary background in science, public policy, and history to provide readers with 71 short essays that help us better understand aspects of the world–including its people, environment, energy consumption, and present crises (among other things). In most of his essays, Smil utilizes both data and reasoning with data to shed light on diverse topics, with issues ranging from happiness rankings and vaccine payoffs to chicken production and diesel engines. Though the book arguably has some flaws, its easy-to-digest essays–many of which …
Synthesis Of Small Molecule Modulators Of Non-Traditional Drug Targets, Jamie Nunziata
Synthesis Of Small Molecule Modulators Of Non-Traditional Drug Targets, Jamie Nunziata
USF Tampa Graduate Theses and Dissertations
This work details the effort toward structure-activity-relationship (SAR) studies and synthesis of the small molecule modulators of two non-traditional drug targets. The first part of this manuscript (chapters 1–2) will discuss the collaborative work and synthesis of an inhibitor of Slingshot Homology 1 (SSH1) with the potential therapeutic application toward Alzheimer’s Disease (AD) treatment. The second part (chapters 3–6) will discuss the synthetic efforts toward modulation of a protein target known as STING, or stimulator of interferon genes, with the therapeutic application toward autoimmune disease or anti-tumor activity.
AD is a progressive and degenerative illness that holds the title of …
Meta-Analysis Of United States Seabird Populations Based On Ocean Biodiversity Information System (Obis) Records (1965–2018), Savannah Hartman
Meta-Analysis Of United States Seabird Populations Based On Ocean Biodiversity Information System (Obis) Records (1965–2018), Savannah Hartman
USF Tampa Graduate Theses and Dissertations
Understanding the distribution of organisms is an important priority for society as we live through ecosystem transformations that threaten the well-being of all organisms. I have approached the dynamic and complex issue of studying biodiversity by using open-access seabird data collected along the Americas since the 1960s. I explained how these data have changed over time and space, how certain species populations could have shifted over time, and possible correlations between this potential geographic change and select environmental variables.
In Chapter 2 I evaluated the suitability of the open-access data archive Ocean Biodiversity Information System (OBIS) for supporting detailed inquiry …
Exploring The Impact Of Eddies On Southern Ocean Biogeochemical Structure Using Bgc-Argo Float Observations, Nicola J. Guisewhite
Exploring The Impact Of Eddies On Southern Ocean Biogeochemical Structure Using Bgc-Argo Float Observations, Nicola J. Guisewhite
USF Tampa Graduate Theses and Dissertations
The Southern Ocean plays a crucial role in global ocean circulation, and global heat and nutrient transport. However, this region is both distant and dangerous and is therefore largely under-sampled and understudied. Methods to fill in biogeochemical data-gaps include using limited in-situ data in models to output biogeochemical property estimates, but a number of recent studies have raised concerns about how most Southern Ocean models do not resolve eddies. Eddies are known to impact biogeochemistry around the globe but little is known about their impact in the Southern Ocean. This study examines temperature, salinity, oxygen, nitrate, and dissolved inorganic carbon …
Detection Of Subsidence In West-Central Florida Using Persistent Scatterer Interferometry And Near-Surface Geophysics, Tonian R. Robinson
Detection Of Subsidence In West-Central Florida Using Persistent Scatterer Interferometry And Near-Surface Geophysics, Tonian R. Robinson
USF Tampa Graduate Theses and Dissertations
This dissertation consists of three studies that employ Persistent Scatterer Interferometry (PSI, also known as PSInSAR) to better understand how subsidence in west-central Florida relates to underlying geological processes. In the first study, near-surface geophysical methods (Ground Penetrating Radar (GPR) and Electrical Resistivity (ERT)), terrestrial remote sensing applications (Light Detection and Ranging (LiDAR) and Structure from Motion (SfM)), and PSI were used to monitor the spatial and temporal behaviors of a suspected growing sinkhole in the Sandhill Boyscout Reservation, Hernando County, Florida. The survey area was located within and around a topographic low assumed to be the surface of the …
Flow Generation And Propagation From Headwater Wetlands To Downstream Waters, Leanne Marie Stepchinski
Flow Generation And Propagation From Headwater Wetlands To Downstream Waters, Leanne Marie Stepchinski
USF Tampa Graduate Theses and Dissertations
Headwater wetlands are connected to one another and to downstream waters by dynamic hydrologic flowpaths, functioning as integrated hydrologic networks at the watershed scale. Headwater wetlands perform a variety of hydrologic lag, sink, and source functions, including flow generation and propagation, thereby contributing to the natural flow regimes of downgradient waters. The functions of individual wetlands and their contributions to hydrologic connectivity and subsequently to the natural flow regime have been widely studied and are well understood. Comparatively, the functions and hydrologic connectivity within wetland complexes as a whole and their collective subsequent contributions to the natural flow regime of …
Climate Of A Cave Laboratory Representative For Rock Art Caves In The Vézère Area (South-West France), Delphine Lacanette, Léna Bassel, Fabien Salmon, Jean-Christophe Portais, Bruno Bousquet, Rémy Chapoulie, Faten Ammari, Philippe Malaurent, Catherine Ferrier
Climate Of A Cave Laboratory Representative For Rock Art Caves In The Vézère Area (South-West France), Delphine Lacanette, Léna Bassel, Fabien Salmon, Jean-Christophe Portais, Bruno Bousquet, Rémy Chapoulie, Faten Ammari, Philippe Malaurent, Catherine Ferrier
International Journal of Speleology
Leye Cave (Dordogne, France) is a laboratory cave in the Vézère area, a region that contains some of the most famous rock art caves in the world such as Lascaux, Font-de-Gaume and Combarelles, and is listed as Human World Heritage by UNESCO. Leye Cave was selected because it is representative of painted caves, with respect to parameters such as its geological stage, the presence of water and carbon dioxide, the geological state of its walls, and the size of the cave. These wall states are studied to better understand the conditions of conservation of rock art caves without damaging them. …
Organizing And Communicating Health: A Culture-Centered And Necrocapitalist Inquiry Of Groundwater Contamination In Rural West Bengal, Parameswari Mukherjee
Organizing And Communicating Health: A Culture-Centered And Necrocapitalist Inquiry Of Groundwater Contamination In Rural West Bengal, Parameswari Mukherjee
USF Tampa Graduate Theses and Dissertations
As a discursive point of praxis, this dissertation project seeks to record knowledge from below around the overlaps between health, water and health interventions emerging from rural communities located in North 24 Parganas and Purulia in West Bengal that are disproportionately impacted by water-insecurity. My dissertation also documents how multiple-stakeholders such as local NGOs, international NGOs, non-profits, and donor agencies organize access to safe water and health interventions for the water-insecure communities located in North 24 Parganas and Purulia. The integration of the CCA and necrocapitalism afford theoretical and methodological guidance in this dissertation to help document the localocentric stories …
Applied Analysis For Learning Architectures, Himanshu Singh
Applied Analysis For Learning Architectures, Himanshu Singh
USF Tampa Graduate Theses and Dissertations
Modern data science problems revolves around the Koopman operator Cφ (or Composition operator) approach, which provides the best-fit linear approximator to the dynamical system by which the dynamics can be advanced under the discretization. The solution provided by Koopman in the data driven methods is in the sense of strong operator topology, which is nothing better then the point-wise convergence of data (snapshots) in the underlying Hilbert space. Chapter 2 provides the details about the aforementioned issues with essential counter-examples. Thereafter, provable convergence guarantee phenomena is demonstrated by the Liouville weighted composition operators Af,φ over the Fock space by providing …
Classification Of Finite Topological Quandles And Shelves Via Posets, Hitakshi Lahrani
Classification Of Finite Topological Quandles And Shelves Via Posets, Hitakshi Lahrani
USF Tampa Graduate Theses and Dissertations
The objective of this dissertation is to investigate finite topological quandles and topological shelves. Precisely, we give a classification of both finite topological quandles and topological shelves using the theory of posets. For quandles with more than one orbit, we prove the following Theorem.
Proposition 0.0.1. Let X be a finite quandle with n orbits X1, ... , Xn. Then any right continuous poset on X is n-partite with vertex sets X1, ... , Xn.
For connected quandles, we prove the following Theorem.
Theorem 0.0.2. There is no T …
Exploratory Data-Driven Models For Water Quality: A Case Study For Tampa Bay Water, Sandra Sekyere
Exploratory Data-Driven Models For Water Quality: A Case Study For Tampa Bay Water, Sandra Sekyere
USF Tampa Graduate Theses and Dissertations
Water, a crucial resource for sustaining life, covers approximately 70% of the earth's surface. Nonetheless, the quality of water is deteriorating rapidly due to the rapid growth of urban areas and industries, which is a worrying trend causing harm to human health and the ecosystem. Water quality forecasting has a key role in water resources management by enabling effective pollution control, ecosystem monitoring, and decision-making.
Previously, traditional statistical models were used to forecast water quality, but they were unable to examine the non-linear relationships between water quality parameters, and they assumed that all datasets were distributed normally. This study uses …
Deep Learning Enhancement And Privacy-Preserving Deep Learning: A Data-Centric Approach, Hung S. Nguyen
Deep Learning Enhancement And Privacy-Preserving Deep Learning: A Data-Centric Approach, Hung S. Nguyen
USF Tampa Graduate Theses and Dissertations
Deep Learning and its applications have become attractive to a lot of research recentlybecause of its capability to capture important information from large amounts of data. While most of the work focuses on finding the best model parameters, improving machine learning performance from data perspective still needs more attention. In this work, we propose techniques to enhance the robustness of deep learning classification by tackling data issue. Specifically, our data processing proposals aim to alleviate the impacts of class-imbalanced data and non- IID data in deep learning classification and federated learning scenarios. In addition, data pre-processing strategies such that dimensionality …
Applications In Opioid Analysis With Faims Through Control Of Vapor Phase Solvent Modifiers, Nathan Grimes
Applications In Opioid Analysis With Faims Through Control Of Vapor Phase Solvent Modifiers, Nathan Grimes
USF Tampa Graduate Theses and Dissertations
Field Asymmetric Ion Mobility Spectrometry (FAIMS), often coupled with mass spectrometry (MS), offers rapid analytical ion filtration, useful in reducing matrix interference and differentiating isomeric compounds. This study focuses on augmenting FAIMS-MS analyses through the incorporation of gas phase solvents, or "modifiers," inducing dynamic microsolvation, a particularly potent method of analysis enhancement.
Initially, the research utilized a bubbler-based system, incorporating a humidity sensor, improving modifier concentration control when using water. Our application in opioid detection and differentiation revealed considerable advancements. Notably, an increased peak capacity in an opioid mixture and successful separation of the isobaric opioid pair, alfentanil and ortho-isopropyl …
Analysis Of Ostds Failure Potential Due To Sea-Level Rise And Other Inundation Factors: An Integrated Geo-Spatial Analysis, Alec Colarusso
Analysis Of Ostds Failure Potential Due To Sea-Level Rise And Other Inundation Factors: An Integrated Geo-Spatial Analysis, Alec Colarusso
USF Tampa Graduate Theses and Dissertations
While many aspects of climate change are well-studied, the vulnerability of Onsite Sewage Treatment and Disposal Systems (OSTDS) to sea-level rise (SLR) has not been thoroughly examined despite the potentially significant environmental impacts, including nutrient and pathogen loading. Research gaps include the need to determine the suitability of models to predict groundwater inundation due to SLR and the consequent impact on OSTDS. As such, this study aims to compare Bathtub/hydrostatic and physics-based/MODFLOW/3D numerical modeling methods of simulating groundwater inundation from SLR to identify OSTDS vulnerability to failure due to a reduction in the height of the vadose zone (saturation or …
Synthesis, Characterization, And Separation Of Loaded Liposomes For Drug Delivery, Sandra Khalife
Synthesis, Characterization, And Separation Of Loaded Liposomes For Drug Delivery, Sandra Khalife
USF Tampa Graduate Theses and Dissertations
Liposomes are viable candidates for drug delivery vehicles due to their ability to protect loaded compounds, dampen side effects of drugs, and be delivered to target sites in the body. The amphipathic nature of these lipid vesicles makes them very customizable through careful selection of bilayer and aqueous core components as well as synthetic and downsizing methods. However, synthetic methods may result in unencapsulated compounds remaining present alongside loaded liposomes, which require removal before the liposome suspension can be used.
This work explores the use of model DOPC as well as DOPC and CHOL liposomes and the methods that were …
Environmental Chemical Analysis Method Optimization And Application To Northwest Cuban Marine Sediment, Thea R. Bartlett
Environmental Chemical Analysis Method Optimization And Application To Northwest Cuban Marine Sediment, Thea R. Bartlett
USF Tampa Graduate Theses and Dissertations
A method for gas chromatography tandem mass spectrometry (GC-MS/MS) in selected reaction monitoring (SRM) mode has been optimized to quantify 250 compounds of a variety of compound classes such as polycyclic aromatic hydrocarbons (PAHs), oxidized PAHs, organochlorinated pesticides, polychlorinated biphenyls, biomarkers (hopanes, steranes, tri-aromatic steroids, and fecal sterols), aliphatic hydrocarbons, and plastic additives. This method was validated based on available QA/QC standards using several environmental samples, both sediment and biota, and standard reference materials. This contaminant-focused method can be used as a forensic geochemistry tool to evaluate oil contamination and other contaminant histories in future research studies. When applied to …
Stable Isotope Analysis Of Doryteuthis (Amerigo) Pealeii Eye Lenses To Determine Migratory Patterns In The Eastern Gulf Of Mexico Using Statoliths For Age Determination, Hannah M. Schwaiger
Stable Isotope Analysis Of Doryteuthis (Amerigo) Pealeii Eye Lenses To Determine Migratory Patterns In The Eastern Gulf Of Mexico Using Statoliths For Age Determination, Hannah M. Schwaiger
USF Tampa Graduate Theses and Dissertations
Doryteuthis (Amerigo) pealeii is a common fisheries squid that occurs in the Gulf of Mexico (GoM) and along the east coast of the United States. These squid are an important link in the food web, linking higher and lower trophic positions (Madsen et al., 2007), and they are also used for human consumption. The migration patterns of D. pealeii populations in the northwestern North Atlantic have been thoroughly studied when compared to those in the GoM. This research aims to combine statolith aging and stable isotope analysis to enhance the understanding of D. pealeii migration patterns throughout their short, sub-annual …
Characteristics And Hydraulic Behavior Of Adsorptive Media For Use In Permeable Reactive Barriers, Shelby Rocha
Characteristics And Hydraulic Behavior Of Adsorptive Media For Use In Permeable Reactive Barriers, Shelby Rocha
USF Tampa Graduate Theses and Dissertations
The Cargill ditch is located on the property of Se7en Wetlands, a 1600-ac treatment wetland system in Lakeland, Polk County, Florida. The Se7en Wetlands property was previously utilized for phosphate mining prior to the construction of the system. Nonpoint nutrient sources derived from remnants of abandoned phosphate mines – known as “legacy phosphorus” – become mobilized by stormwater runoff and impair surface water bodies by promoting harmful algal blooms (HABs). Thus, the Cargill ditch likely conveys nutrient rich flow resulting from legacy phosphorus and is thought to be one contributing factor in the occurrence of HABs within the treatment wetland …
Investigation Of Challenging Transformations In Gold Catalysis, Qi Tang
Investigation Of Challenging Transformations In Gold Catalysis, Qi Tang
USF Tampa Graduate Theses and Dissertations
This dissertation mainly contains three parts: 1) Divergent gold catalysis for alkyne trifunctionalization, encompassing three distinct modes to achieve the simultaneous formation of C-N, C-O, and C-C bonds in a single step 2) the study and development of a new method to synthesize azaborine derivatives; and 3) the construction of benzotriazole boranes (BTAB) as stable four-coordinate N-B heterocycles through gold-catalyzed alkyne hydroboration.
In the first part, alkyne trifunctionalization via divergent gold catalysis will be introduced. This novel approach involves a sequence of reactions that combine gold π-activation, vinyl gold nucleophilic addition, and gold (III) reductive elimination. By utilizing this methodology, …
Gold-Catalyzed Diyne-Ene Cyclization: Synthesis Of Hetero Polyaromatic Hydrocarbons And 1,2-Dihydropyridines, Jingwen Wei
Gold-Catalyzed Diyne-Ene Cyclization: Synthesis Of Hetero Polyaromatic Hydrocarbons And 1,2-Dihydropyridines, Jingwen Wei
USF Tampa Graduate Theses and Dissertations
Homogeneous gold catalysts are known as a powerful tool for selectively activating alkynes and are well-developed in the construction of C-C, C-N, and C-O bonds to form complex compounds that are widely used in pharmaceuticals, industries, agriculture, etc. The investigation of gold(I) catalysis on conjugated diyne (compounds having two acetylene groups) enriches the complexity of the bond construction and allows the building of interesting skeletons in organic synthesis. One typical kind of substrate, diyne-ene, has both a conjugated diyne part and a 1,6- enyne part. We developed a new methodology to allow its divergent synthesis to heterocycles.
This dissertation mainly …
Applications Of Seismic And Geodetic Data To Earthquake Hazard Research, Mahsa Afra
Applications Of Seismic And Geodetic Data To Earthquake Hazard Research, Mahsa Afra
USF Tampa Graduate Theses and Dissertations
Being a part of a seismically active zone, including large and crowded cities such asTehran, Qazvin and Semnan, Central Alborz experiences many local earthquakes. Knowl- edge of crustal velocity structure in this area is thus necessary considering its economical and political importance, a large concentration of population, and relatively poor construc- tion practice which increases the earthquake risks in this region. In second chapter of this thesis, we aim at obtaining the 3D crustal velocity structure of the Central Alborz region in northern Iran using local earthquake tomography. We also validate anomalies inferred from our velocity model using an independent …
The Applicability Of The Postmortem Submersion Interval Estimation Formula For Human Remains Found In Subtropical Aquatic Environments, Kara L. Dicomo
The Applicability Of The Postmortem Submersion Interval Estimation Formula For Human Remains Found In Subtropical Aquatic Environments, Kara L. Dicomo
USF Tampa Graduate Theses and Dissertations
Within the past decade, several attempts have been made to standardize a method for estimating postmortem submersion intervals (PMSI); however, the majority of these studies have focused on data from a temperate climate which cannot be taken as representative of large portions of the globe. Thus, there are large portions of the earth in which the methodology from these studies may not be able to accurately estimate PMSI which has the potential to leave investigators in these other climatic zones at a disadvantage. This presentation presents a case study into the applicability of two Total Body Scoring Systems (TADS) utilized …
Insect Classification And Explainability From Image Data Via Deep Learning Techniques, Tanvir Hossain Bhuiyan
Insect Classification And Explainability From Image Data Via Deep Learning Techniques, Tanvir Hossain Bhuiyan
USF Tampa Graduate Theses and Dissertations
Since the dawn of the Industrial Revolution, humanity has always tried to make labor more efficient and automated, and this trend is only continuing in the modern digital age. With the advent of artificial intelligence (AI) techniques in the latter part of the 20th century, the speed and scale with which AI has been leveraged to automate tasks defy human imagination. Many people deeply entrenched in the technology field are genuinely intrigued and concerned about how AI may change many of the ways in which humans have been living for millennia. Only time will provide the answers. This dissertation is …
Supramolecular Architectures Generated By Self-Assembly Of Guanosine And Isoguanosine Derivatives, Mengjia Liu
Supramolecular Architectures Generated By Self-Assembly Of Guanosine And Isoguanosine Derivatives, Mengjia Liu
USF Tampa Graduate Theses and Dissertations
This dissertation is primarily divided into three parts: 1) Anion, solvent-mediated, tunable self-assemblies of isoguanosine (isoG). 2) Post-assembly modification of the non-covalent isoG-pentaplex for Cesium extraction. 3) Supramolecular asymmetric amine catalysis.
The structural conformational design of the isoG decamer was employed for systematic investigations involving various substituted groups at the C8 position of purine and ribose. A series of isoG analogs with C8-phenyl substitutions were synthesized and utilized for Cesium coordination. The proximity between purine and ribose structures limited pentaplex formation for C8-phenyl substituted isoG derivatives. Based on this observation, a deoxy isoG derivative with a modified ribose was employed …