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Articles 931 - 960 of 19120
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Post-Processing National Water Model Long-Range Forecasts With Random Forest Regression In The Cloud To Improve Forecast Accuracy For Decision-Makers And Water Managers, Jacob Matthew Anderson
Post-Processing National Water Model Long-Range Forecasts With Random Forest Regression In The Cloud To Improve Forecast Accuracy For Decision-Makers And Water Managers, Jacob Matthew Anderson
Theses and Dissertations
Post-processing bias correction of streamflow forecasts can be useful in the hydrologic modeling workflow to fine-tune forecasts for operations, water management, and decision-making. Hydrologic model runoff simulations include errors, uncertainties, and biases, leading to less accuracy and precision for applications in real-world scenarios. We used random forest regression to correct biases and errors in streamflow predictions from the U.S. National Water Model (NWM) long-range streamflow forecasts, considering U.S. Geological Survey (USGS) gauge station measurements as a proxy for true streamflow. We used other features in model training, including watershed characteristics, time fraction of year, and lagged streamflow values, to help …
Geochemical Characterization And Predictive Soil Mapping Of Ice-Free Regions In Antarctica, Rachel Willmore
Geochemical Characterization And Predictive Soil Mapping Of Ice-Free Regions In Antarctica, Rachel Willmore
Theses and Dissertations
Antarctic soils are formed by extreme climate, minimal biological activity, and diverse geological settings. This study analyzes 201 soil samples across four ice-free Antarctic Conservation Biogeographic Regions - North-west Antarctic Peninsula, Transantarctic Mountains, South Victoria Land, and North Victoria Land - to create a geochemical database (pH, EC, CEC, C and N, and ion concentrations) as well as to determine if there are consistent trends between geochemical properties and soil forming factors (SCORPAN). Despite variation in geochemical properties and SCORPAN covariates, some consistent trends emerged across all regions and individual Antarctic Conservation Biogeographic Regions. Using SCORPAN covariates and multiple linear …
Local Food System Planning On Multiple Governance Scales: A Grounded Theory Analysis, Decker Ure
Local Food System Planning On Multiple Governance Scales: A Grounded Theory Analysis, Decker Ure
Theses and Dissertations
Local food systems (LFS) comprise the people, policies, infrastructure and practices of food production, distribution, and consumption in localized areas. LFS are becoming an increasingly important part of urban sustainable development and have recently gained significant traction in the urban planning and sustainable community spheres. Worldwide shocks to global food systems such as the COVID-19 pandemic and the Ukraine-Russia war have further elevated global interest in LFS, bringing local food to the forefront of many communities as they try to insulate themselves and their food supply from future risk. However, despite this growing interest in and policy momentum for local …
Contributions Of Glacier Meltwater To Water Resources And Water Quality Below The Ablating Coropuna Ice Cap In The Arid Peruvian Andes, Alexis Rowley
Contributions Of Glacier Meltwater To Water Resources And Water Quality Below The Ablating Coropuna Ice Cap In The Arid Peruvian Andes, Alexis Rowley
Theses and Dissertations
Rapidly retreating glaciers in the arid tropics are an invaluable resource for communities that depend on meltwater to support drinking water, agriculture, hydropower production, and mining. There is limited understanding of how glacier loss will impact regional water resources, groundwater flow paths, and water quality, especially during the dry season. The Nevado Coropuna volcano in Southern Peru has one of the largest remaining ice caps in the tropics, but has experienced rapid ice loss in the past few decades and is projected to disappear in the next century due to climate change. Located in the northern Atacama Desert, the arid …
Using Two-Dimensional Terahertz Spectroscopy To Explore Vibrations, Magnetism, And Their Coupling, Megan Faux Biggs
Using Two-Dimensional Terahertz Spectroscopy To Explore Vibrations, Magnetism, And Their Coupling, Megan Faux Biggs
Theses and Dissertations
Terahertz (THz) light is at the resonant frequency of important fundamental excitations within crystalline materials such as carrier dynamics, phonons, and spin-wave excitations called magnons. THz light can be produced at high field strengths using optical rectification in nonlinear optical (NLO) crystals. N-benzyl-2-methyl-4-nitroaniline (BNA) is one such crystal commonly used to produce THz when pumping with 800 nm light. Here, we improve upon the design of the molecular building blocks of BNA by replacing a hydrogen atom with a fluorine atom, leading to improved THz generation and a higher crystal damage threshold. Later, we focus on using THz light to …
Kinetic Modeling Of Bacteria Removal From Suspensions By Magnetic Nanoparticle Capture And Magnetic Separation, Bowen J. Houser
Kinetic Modeling Of Bacteria Removal From Suspensions By Magnetic Nanoparticle Capture And Magnetic Separation, Bowen J. Houser
Theses and Dissertations
This thesis investigates the kinetic modeling of bacteria removal from suspensions using magnetic nanoparticle (MNP) capture and magnetic separation. Functionalized magnetic nanoparticles, especially those coated with polydopamine (pDA), were employed to bind with various bacterial species in phosphate-buffered saline (PBS), apple juice, whole blood, and its components. By analyzing the capture efficiency and kinetics of capture across different bacterial species and mediums, we developed mathematical models describing the capture kinetics of bacteria by the pDA-MNPs. Experimental results demonstrated that pDA-coated MNPs achieved high capture efficiency with certain Gram-positive species like Staphylococcus aureus, and one Gram-negative species, Neisseria perflava; however, capture …
New Chapters In An Old Book: New Discoveries In Transferrin's Blood Stream Modulators And Analytical Methods, Shelby Thomas Harris
New Chapters In An Old Book: New Discoveries In Transferrin's Blood Stream Modulators And Analytical Methods, Shelby Thomas Harris
Theses and Dissertations
Human serum transferrin is a 79 kDa glycoprotein responsible for the safe transport of iron throughout the blood stream. Transferrin binds up to two ferric ions in two domains known as the N-lobe and C-lobe respectively. Thus, there are four transferrin metalloforms: apo-Tf (with no iron bound), FeN-Tf (with one iron bound in the N-lobe), FeC-Tf (with one iron bound in the C-lobe) and holo-Tf(with two iron ions bound, one in each of the lobes). The two domains are homologous but feature differences in the kinetics and thermodynamics of iron binding and release. The two lobes are also different in …
Taking A Bite Out Of Shark Week: Discovery's Csa And Csr Messages, Kari Mortenson
Taking A Bite Out Of Shark Week: Discovery's Csa And Csr Messages, Kari Mortenson
Theses and Dissertations
The present study looks at how companies use corporate social responsibility (CSR) and corporate social accountability (CSA) messages differently. This study uses Discovery Channels Shark Week as an example by utilizing a grounded deductive analysis of Discovery's X, formerly known as Twitter, posts from 2015-2020. This timeline was chosen thanks to Discovery partnering with the non-profit organization Oceana in 2010 to create more informed and conservation minded content. The posts on Discovery's X account during each Shark Week from 2015-2020 were examined. Each were coded for themes, Other, CSA, or CSR, and additional frames for those themes. The frames gathered …
Quality And Sensory Characteristics Of Selected Freeze-Dried Foods After 50 Years Storage, Prithiviraj Jegannathan
Quality And Sensory Characteristics Of Selected Freeze-Dried Foods After 50 Years Storage, Prithiviraj Jegannathan
Theses and Dissertations
Freeze-drying is a dehydration process that uses low temperature and pressure to remove moisture from food. With an annual market value of over $35 billion in 2023, freeze-dried foods are widely used in various situations requiring long-term storage such as military rations, emergency food supplies, and space exploration. Freeze-dried foods are becoming more popular for their quality, light weight, easy storage at room temperature, and quick rehydration. Moreover, many freeze-dried food manufacturers claim that their freeze-dried food products can last for 25 years or more. However, there are currently no published studies supporting such claims. Chemical, physical, and sensory properties …
Time Reversal Delivery Of Long Duration Noise To A Targeted Location: Achieving Higher Amplitude While Maintaining A Desired Spectral Shape And Maximizing The Spatial Extent, Rylee Scott Russell
Time Reversal Delivery Of Long Duration Noise To A Targeted Location: Achieving Higher Amplitude While Maintaining A Desired Spectral Shape And Maximizing The Spatial Extent, Rylee Scott Russell
Theses and Dissertations
Time Reversal (TR) is a signal processing technique that can be used to focus acoustic waves to a specific location in space, with most applications aiming to create an impulsive focus. This study instead aims to focus long-duration noise signals using TR. This thesis seeks to generate higher amplitude noise at a desired location over an existing method of broadcasting equalized noise. Additionally, this thesis explores various characteristics associated with focusing long duration noise using TR. The dependence of the focal amplitude on the duration of the focused signal is explored as well as the implications of using multiple sources …
Grain Boundary Solute Segregation Across The 5d Space Of Crystallographic Character, Lydia Harris Serafin
Grain Boundary Solute Segregation Across The 5d Space Of Crystallographic Character, Lydia Harris Serafin
Theses and Dissertations
Solute segregation in materials with grain boundaries (GBs) has emerged as a popular method to thermodynamically stabilize nanocrystalline structures. However, the impact of varied GB crystallographic character on solute segregation has never been thoroughly examined. This work examines Co solute segregation in a dataset of 7272 Al bicrystal GBs that span the 5D space of GB crystallographic character. Considerable attention is paid to verification of the calculations in the diverse and large set of GBs. In addition, the results of this work are favorably validated against similar bicrystal and polycrystal simulations. As with other work, we show that Co atoms …
The Influence Of Heat Therapy On Redox Signaling In Skeletal Muscle, Kimberly Miriam Richard
The Influence Of Heat Therapy On Redox Signaling In Skeletal Muscle, Kimberly Miriam Richard
Theses and Dissertations
Reactive oxygen species (ROS) have been identified as crucial signaling molecules in skeletal muscle adaptations to exercise and signal for protective pathways within the myofiber. Pathological heat stress studies in animals demonstrate the ability of heat to increase ROS production in skeletal muscle. Limited data on the influence of therapeutic heat on ROS production and redox signaling in human skeletal muscle exists in the literature. The purpose of this study was to assess ROS production and redox signaling in human skeletal muscle following an acute, therapeutic bout of heat treatment. We hypothesized that heat would create an oxidized environment within …
Phosphorus Adsorption Capacity Of Volcanic Scoria, Easton Jeffrey Perkins
Phosphorus Adsorption Capacity Of Volcanic Scoria, Easton Jeffrey Perkins
Theses and Dissertations
Phosphorus (P) pollution in stormwater runoff poses a significant threat to water quality, contributing to eutrophication and ecosystem degradation. This research evaluates the potential of volcanic scoria (VSco), an abundant and cost-effective resource in Utah, USA, to influence P concentrations in urban stormwater systems. Batch adsorption experiments examined the behavior of VSco across three particle sizes—fine (<0.841 mm), medium (0.841–2 mm), and granular (2.38–9.5 mm)—under conditions mimicking stormwater scenarios. The results reveal that fine VSco exhibited higher adsorption efficiency than medium and granular sizes, achieving notable P removal at higher concentrations. However, at lower concentrations, fine VSco showed potential for P release due to desorption of pre-existing P. Medium and granular VSco showed minimal adsorption capacity and, in some cases, acted as P sources, highlighting a dual potential depending on stormwater conditions. Adsorption isotherms indicate that the adsorption behavior of fine VSco aligns with the Langmuir model, with a finite and relatively low adsorption capacity. Calculated distribution coefficient (Kd) values for fine VSco ranged from 0.04 to 0.005 L/g, indicating weak adsorption efficiency compared to materials like activated carbon (1–10 L/g) or soils with moderate adsorption capacity (0.1–0.5 L/g). Loss-on-ignition tests confirmed that VSco’s performance is driven by its physical and chemical properties, particularly its calcium content, rather than organic matter. The study emphasizes caution in applying fine VSco for stormwater remediation due to its potential to release P under typical runoff conditions. However, fine VSco may still be viable in specific scenarios where P levels are higher, such as in stormwater hotspots or localized areas with elevated concentrations, allowing for targeted remediation. The research underscores the need for further testing to refine VSco’s applications, particularly in low-impact development (LID) practices, such as infiltration basins and rain gardens, to effectively manage P levels while supporting ecological and aesthetic goals. These findings contribute to understanding the complex role of VSco in urban stormwater systems, offering insights for sustainable water quality management and nutrient cycling in urban landscapes.
Navigating Displacement: Jewish-Brazilian Identity In Lasar Segall's Encontro, Kendall Evonne Da Silva
Navigating Displacement: Jewish-Brazilian Identity In Lasar Segall's Encontro, Kendall Evonne Da Silva
Theses and Dissertations
Jewish-Lithuanian artist Lasar Segall's 1924 painting Encontro has historically been interpreted as representing Segall's integration and assimilation into Brazilian society. This reading, however, generally overlooks Segall's experience as an Eastern European Jew living in Brazil during the early twentieth century. In this thesis, I examine the influence of Segall's ethnic background on his art and investigate how Segall appropriates pardo identity in Encontro, not unproblematically, in an effort to convey feelings of alienation and exclusion. Along with looking at his visual art, my analysis incorporates my translations of Segall's essays on Jewishness, which shed light on his relationship to Judaism …
Ethnic Group Affiliation And Perceptions Of Ethnic Russians In Lithuania, Morgan Lindsay Hassell
Ethnic Group Affiliation And Perceptions Of Ethnic Russians In Lithuania, Morgan Lindsay Hassell
Theses and Dissertations
There are many factors that influence language acquisition and use, particularly in multilingual environments. The ethnic group affiliation (EGA) of speakers, or the degree to which a speaker identifies with their native language or culture, has been shown to have a significant impact on language use (Gatbonton, Trofimovich & Segalowitz 2009, Zabrodskaja 2015). EGA can also impact the judgments of and attitudes toward these speakers by others (e.g., Trofimovich & Turuševa 2020). Lithuania is a multilingual state with a complex political and linguistic history, particularly in relation to the Russian language and people. In this study, 150 native Lithuanians and …
Developing A New Liquefaction Ejecta Prediction Model Considering Soil Properties Of Non-Liquifiable Surface Layers Using New Large Database From The 2012 Emilia Romagna, Italy Earthquakes, Jonah Bradley Dundas
Developing A New Liquefaction Ejecta Prediction Model Considering Soil Properties Of Non-Liquifiable Surface Layers Using New Large Database From The 2012 Emilia Romagna, Italy Earthquakes, Jonah Bradley Dundas
Theses and Dissertations
The presence of a non-liquefied crust overlying a liquefied layer has been found to have a significant effect on sand ejecta and surficial liquefaction damage, as observed by Ishihara (1985). Following the 2010-2011 Canterbury seismic sequence in New Zealand, almost no foundation deformation occurred in areas with liquefaction susceptible soils overlain by at least a 3 meter thick crust [1]. In contrast, the 2012 Emilia-Romagna earthquake in Italy provided surface evidence of liquefaction despite 6+ meter thick crusts. Several researchers have proposed liquefaction prediction models [e.g. LPI [2], Ishihara Curves [3], LSN [4], LPIISH [5] and the methods proposed by …
Performance Prediction For Hub-Based Swarms, Puneet Jain
Performance Prediction For Hub-Based Swarms, Puneet Jain
Theses and Dissertations
Optimization problems lie at the core of improving performance in various tasks, ranging from day-to-day work scheduling to coordinating robots in a warehouse fulfillment center. Distributed swarm systems provide a robust and adaptive solution approach to many optimization problems. Instead of using one really sophisticated agent, multiple smaller less sophisticated agents can provide the flexibility to evaluate more options and still provide a "good" answer. This dissertation uses graphs to model, analyze, and simulate swarm behavior, primarily to predict the time-to-converge (TTC) and success probability. First, we use a bipartite model for the distributed best-of-N problem, and show how the …
Assessing Coincidence Of Satellite Acquisitions And Flood Events To Predict Suitability For Flood Map Synthesis, Lyle Dale Prince
Assessing Coincidence Of Satellite Acquisitions And Flood Events To Predict Suitability For Flood Map Synthesis, Lyle Dale Prince
Theses and Dissertations
Flooding is a global problem that impacts people, communities, and governments every year. Better understanding of flooding in an area can enable improved emergency response before a flood hits. Flood maps are a crucial tool to translate what for most is an abstract flow, into a more understandable and actionable representation of who and what are at risk. Satellite based flood maps are a useful tool that has potentially global applications. We developed methods to determine which areas are suitable for generating satellite-based synthetic flood maps. For our processes we used Forecasting Inundation Extents using REOF analysis (FIER): a data-driven …
A Comparison Of Rfssw And Rsw For Automotive Manufacturing, Damon Michael Gale
A Comparison Of Rfssw And Rsw For Automotive Manufacturing, Damon Michael Gale
Theses and Dissertations
Historically, automotive body panels have been made of steel and joined by a process called resistance spot welding (RSW). However, in efforts to reduce vehicle weight to improve the energy efficiency of the vehicle, automotive manufactures have begun substituting aluminum in place of steel. While aluminum can be joined with RSW, a myriad of challenges arise from doing so. These challenges result in less consistent weld quality and accelerated electrode wear. Refill friction stir spot welding (RFSSW) is an emerging joining technology that could replace RSW as it is believed to be capable of creating superior joints in thin sheet …
Site Amplification In The Salt Lake Valley, Utah, During The 2020 Magna Earthquake, Blair A. Hanson
Site Amplification In The Salt Lake Valley, Utah, During The 2020 Magna Earthquake, Blair A. Hanson
Theses and Dissertations
Site amplification in the Salt Lake Valley, Utah, has been a focus for both geologists and engineers due to its complex geology and seismic vulnerability. This study utilizes data from the 2020 Magna Earthquake to analyze site amplification from previously unavailable strong ground motion data. Ground motion data from the University of Utah Regional Seismic Network and the National Strong Motion Project, combined with extensive soil profiles, was analyzed using the program DEEPSOIL. The study compares computed motions with measured motions, revealing differences in site amplification across the Salt Lake Valley. Notably, the highest amplification was observed at longer periods …
Discharge-To-Water Level Conversion Using Monthly Duration Curves (Dwl-Mdc): Enhancing The Utility Of The Geoglows Ecmwf Hydrological Model, Darlly Judith Rojas Lesmes
Discharge-To-Water Level Conversion Using Monthly Duration Curves (Dwl-Mdc): Enhancing The Utility Of The Geoglows Ecmwf Hydrological Model, Darlly Judith Rojas Lesmes
Theses and Dissertations
Flood early warning systems are crucial for disaster risk reduction strategies, enabling communities to take timely action against threats. However, the effectiveness of these systems depends on accurate and timely hydrological data, particularly river discharge and water level measurements. Unfortunately, many regions, face significant challenges in obtaining hydrological data, especially discharge data due to outdated rating curves, high equipment costs, and logistical constraints. Water level measurements, by contrast, offer reduced uncertainty and are often more accessible, providing an alternative for hydrological modeling in data-scarce regions. To address these limitations, we developed and validated the Discharge-to-Water Level Conversion Using Monthly Duration …
Stress, Screens, And Social Skills: Parental Stress As A Longitudinal Predictor Of Preschool Social Behavior Mediated By Parental Technoference, Sarah Ashby
Theses and Dissertations
This study examines the longitudinal relationship between parental stress, parental technoference, and preschool children's social behavior, including physical aggression, relational aggression, and prosocial behavior. Using data from Project M.E.D.I.A., the study explores how parental stress may be linked to disruptions in parent-child interactions through increased use of digital media, termed "technoference." It was predicted that an increase in parental stress would increase physical and relational aggression, and decrease prosocial behavior over time, as mediated by parental technoference. A sample of 460- parent-child dyads was analyzed across three time points using structural equation modeling. Despite expectations, results did not find significant …
Effects Of Microbial Lipases On Parmesan And Feta Cheese Flavor Profiles, Erin N. Caswell
Effects Of Microbial Lipases On Parmesan And Feta Cheese Flavor Profiles, Erin N. Caswell
Theses and Dissertations
Lipolysis is crucial for cheese flavor development, as lipolytic enzymes convert fats into free fatty acids that enhance flavor. While Kid/Goat (KG) lipases are traditionally used in cheese production, microbial lipases like M. javanicus (MJ) and C. cylindracea (CC) provide vegetarian, cost-effective alternatives. This study compares the flavor, texture, and composition of Feta and Parmesan cheeses made with microbial lipases as a replacement for traditional lipase. Conventional cheese making techniques were used to make experimental batches of Feta and Parmesan cheeses using a standard KG lipase and two experimental lipases, CC and MJ, and comparing all three against a control …
Climate Change Impacts On Dryland Ecosystems, Tanner Tainui Aiono
Climate Change Impacts On Dryland Ecosystems, Tanner Tainui Aiono
Theses and Dissertations
Dryland ecosystems are some of the most prevalent ecosystems on Earth and have recently shown stress indicators from climate change. These water-limited systems are vulnerable to increases in temperature and changes in precipitation, especially when looking at carbon cycling dynamics across biological sol crusts and vegetation mortality patterns. This dissertation aims to 1) evaluate how precipitation dynamics, vegetation location, and microclimate conditions influence biological soil crust carbon conditions, and 2) evaluate how topographic influences drive patterns of plant mortality during prolonged drought on the Colorado Plateau. Using high-resolution monitoring of long-term NEE chambers, we found that intermediately disturbed biocrusts are …
The Impact Of Positive-To-Negative Teacher Interaction Ratio On Student Performance, Naomi L. Phillips
The Impact Of Positive-To-Negative Teacher Interaction Ratio On Student Performance, Naomi L. Phillips
Theses and Dissertations
Challenging behavior is a growing problem for teachers. Praise has been promoted as a positive strategy for addressing problem behavior. The ratio of praise-to-correction (positive-to-negative) may be important to the effectiveness of praise. A 4:1 ratio has been recommended as optimal to improve student performance. This ratio has never been experimentally tested. There is little known of the feasibility and social validity for maintaining a high positive-to-negative ratio. The purpose of this study was to evaluate the effect of a 4:1 positive-to-negative ratio (PNR) on problem behavior and academic performance of junior high students with an intellectual disability classification in …
Development Of Sensing Capabilities For Agricultural Robotics, Carter Noh
Development Of Sensing Capabilities For Agricultural Robotics, Carter Noh
Theses and Dissertations
Agricultural robotics is a rapidly growing industry with the possibility to revolutionize food production. Agricultural robots often require custom sensing solutions to perform specific tasks. Developing the appropriate sensing capabilities for an application is therefore an important step in the automation process. In this thesis I present two case studies in developing sensing capabilities for agricultural robotics applications. First, I introduce a sensor that can provide simultaneous measurements of force and position. The sensor was developed to enable high-throughput measurement of maize stalk stiffness on a robot platform. It uses multiple sets of strain gauges on a cantilever beam to …
Extracting Speech Content From High-Amplitude Background Machine Noise, Curtis L. Garner
Extracting Speech Content From High-Amplitude Background Machine Noise, Curtis L. Garner
Theses and Dissertations
The research presented in this dissertation aims to address the need for improved communication between heavy machinery operators and external personnel, aiming to improve safety and efficiency by overcoming the communication barriers posed by equipment noise and cab insulation. The primary purpose of this research was to develop a hands-free communication system that allows the operator to hear speech from outside the cab without requiring any personal communication devices like radios or headsets. Key objectives included effective speech extraction from ambient noise and accurate estimation of the location of the speaker. Operating without active user control, the system emphasizes clarity …
Design And Synthesis Of Bimetallic Catalyst And Multifunctional Peptide Catalysis For Organic Synthesis And Synthesis Of Proteolysis Targeting Chimeras (Protacs) For Sphk1 And Sphk2, Mariur Rodriguez Moreno
Design And Synthesis Of Bimetallic Catalyst And Multifunctional Peptide Catalysis For Organic Synthesis And Synthesis Of Proteolysis Targeting Chimeras (Protacs) For Sphk1 And Sphk2, Mariur Rodriguez Moreno
Theses and Dissertations
In the first part of this dissertation (chapters 1-4) we discuss the development of bimetallic and monometallic palladium complexes scaffolded on 2-phosphinoimidazole ligands and their application to cross-coupling reactions. Specifically, we discovered a bimetallic Pd(II) dimer that performs a tandem arylation/annulation reaction to produce naphthalene products from aryl iodides and ketones (Chapter 2). We then show that bimetallic Pd(II) and Pd (I) complexes have different activity in different transformations and that the starting oxidation state of our catalysts is important for reactivity (Chapter 3). For example, we demonstrate that our Pd(I) dimer is much more active in Buchwald- Hartwig amination …
Applications Of Phosphorus Geochemistry To Utah Lake, Jacob Barry Taggart
Applications Of Phosphorus Geochemistry To Utah Lake, Jacob Barry Taggart
Theses and Dissertations
This compilation of studies provides an examination of phosphorus dynamics in the suspended solids, water column, and lakebed sediments of Utah Lake, a large, shallow, and phosphorus-rich water body. The first study introduces a novel phosphorus microfractionation (P-MF) method designed for small samples of suspended solids and sediments. This method reveals that suspended solids in Utah Lake can have a significantly higher phosphorus content across most fractions compared to lakebed sediments, highlighting the importance of considering suspended solids in nutrient management strategies. The second study analyzes historical phosphorus mass and concentrations, demonstrating that water column phosphorus levels have remained stable …
Intramolecular Styryl Diels-Alder (Isda) Reaction For Synthesizing Derivatives Of Anticancer Lignans, Kriti Shrestha
Intramolecular Styryl Diels-Alder (Isda) Reaction For Synthesizing Derivatives Of Anticancer Lignans, Kriti Shrestha
Theses and Dissertations
Intramolecular Styryl Diels-Alder (ISDA) cycloaddition reactions are used widely in synthesizing complex natural products. They help synthesize polycyclic cores and form new chiral centers in the molecule. Among such natural products, lignans are considered important biomedical molecules due to their numerous pharmacological properties, such as antitumor, hepatoprotective, insecticidal, antifungal, antihypertensive, sedative, antioxidant, and antiparasitic. Numerous researchers have published their work in trying to synthesize different lignans for medicinal purposes. However, the lignans are challenging to synthesize because of their complex tetralin cores. This project focuses on synthesizing the polycyclic core for the analogs of anti-cancer compounds with ISDA reaction. The …