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Stratigraphy And Geochemistry Of Paleocene-Aged Bauxites From North Mississippi, Timothy Brendan Clark Jan 2021

Stratigraphy And Geochemistry Of Paleocene-Aged Bauxites From North Mississippi, Timothy Brendan Clark

Electronic Theses and Dissertations

Bauxite is a heavily-mined aluminum ore that forms through the relative depletion of silica to aluminum. In North Mississippi, bauxite occurring within the Upper Midway and Lower Wilcox groups has been the subject of study for over a century. Despite the abundance and duration of research, controversy surrounds the subjects of bauxite genesis and economic value. The last detailed study of North Mississippi bauxite was in the 1980’s, so the goal of this project is to apply newly available technologies and modern hypotheses on bauxite formation to refine and obtain new data. Fieldwork observations yielded pisoliths, horizonation, and possible rhizoliths, …

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The Meat Of The Gothic: Animality And Social Justice In United States Fiction And Film Of The Twenty-First Century, Amber Hodge Jan 2021

The Meat Of The Gothic: Animality And Social Justice In United States Fiction And Film Of The Twenty-First Century, Amber Hodge

Electronic Theses and Dissertations

The Meat of the Gothic: Animality and Social Justice in United States Fiction and Film of the Twenty-First Century— situates twenty-first century US gothic narratives in relation to animal studies, even as it illuminates how these narratives interrogate the effects of historic and ongoing global systems of human oppression: slavery, imperialism, and capitalism. Instead of reacting to bias by asserting a claim to a humanity perpetually imbricated in divisions of class, race, and gender, present-day authors and filmmakers create characters who form communities that include nonhuman actors as a means of generating empowerment and critique. My approach to these narratives …

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How Do Prey Capture And Simulated Fire Affect Growth And Nutrient Limitation In A Carnivorous Pitcher Plant, Sarracenia Alata?, Jalen Christopher Holloway Jan 2021

How Do Prey Capture And Simulated Fire Affect Growth And Nutrient Limitation In A Carnivorous Pitcher Plant, Sarracenia Alata?, Jalen Christopher Holloway

Electronic Theses and Dissertations

Carnivorous plants are defined as being able to benefit from the nutrients of prey in the environment, and have at least one trait that either retrieves, ingests, or lures a prey to its traps. The association of carnivorous plants with fire-prone habitats was initially described as a paradox, considering that carnivorous plants are often associated with nutrient-poor soils and fires can increase soil nutrient availability. This apparent paradox assumes, however, that the nutrients that increase in availability following fire are those also provided by prey, which might not be true. In habitats with nitrogen-poor soils, fire has been shown to …

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Development Of Site - Specific Drug Delivery Systems Using Hot Melt Extrusion And Fused Deposition Modeling 3d Printing, Nagireddy Reddy Dumpa Jan 2021

Development Of Site - Specific Drug Delivery Systems Using Hot Melt Extrusion And Fused Deposition Modeling 3d Printing, Nagireddy Reddy Dumpa

Electronic Theses and Dissertations

Due to preferential site of drug absorption and the need for increased concentration of medication at the required tissues, dosage forms should be designed or formulated in such a way that medication is released at a specific site or after a specific time in the gastrointestinal tract (GIT). Knowledge of transit times of dosage forms in each part of GIT, by use of particular polymers or employing specific delivery systems such as floating systems, delivery of medication to specific sites in the GIT can be achieved. HME coupled FDM 3D printing has the capability to create customized dosage forms for …

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Polyester-Pamam “Janus-Type” Linear-Dendritic Blockopolymers (Ldbcs) As Next Generation Biomaterials, Indika Chandrasiri Jan 2021

Polyester-Pamam “Janus-Type” Linear-Dendritic Blockopolymers (Ldbcs) As Next Generation Biomaterials, Indika Chandrasiri

Electronic Theses and Dissertations

Nanomedicine is defined as the application of knowledge and tools of nanotechnology for disease treatment, diagnosis, monitoring, delivery, and sensing. Rapid advances in polymer chemistry and nanotechnology have led to an extensive development of polymeric-based therapeutic systems for nanomedical applications. Compared to traditional molecular-based therapies, polymers facilitate a higher level of versatility and functionality, such as simultaneous imaging and delivery. In particular, amphiphilic diblock copolymers and their self-assemblies have shown apparent success in nanomedicine owing to their ability to provide narrow molar mass distributions and highly ordered nanoscale multimolecular aggregates, including micelles and vesicles. However, engineering these polymeric materials to …

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Nmr-Based Characterization Of A Glucan Isolated From Ganoderma Lucidum, Alysia Gonzales Jan 2021

Nmr-Based Characterization Of A Glucan Isolated From Ganoderma Lucidum, Alysia Gonzales

Electronic Theses and Dissertations

Ganoderma lucidum is a polypore fungus commonly known as Lingzhi, Youngji or Reishi mushroom in East Asia. It is frequently marketed as an herbal supplement and often utilized as traditional Chinese medicine. Our research comprises the structural investigation of the principal polysaccharide from this fungus. After proper purification, the fungal glucan was subjected to multiple experiments of NMR spectroscopy, including 1D 1H and 13C, 2D; 1H-1H COSY, 1H-1H TOCSY, 1H-1H NOESY, 1H-13C HSQC, 1H-1H Phase Sensitive-TOCSY, and 1H-13C TOCSY-HSQC NMR spectra. Data has confirmed that this fungal polysaccharide contains residues of glucose (91.31%) as major, galactose (4.99%), and mannose (3.69%) …

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Towards A New Method Of Determining Protein Structure, Niloofar Abolhasani Khaje Jan 2021

Towards A New Method Of Determining Protein Structure, Niloofar Abolhasani Khaje

Electronic Theses and Dissertations

Hydroxyl radical protein footprinting (HRPF) by fast photochemical oxidation of proteins (FPOP) is a mass spectrometry-based technique that measures the apparent protein oxidation rate by freely diffusing hydroxyl radicals at different regions in a protein, and correlates changes in this apparent rate with changes in the solvent accessibility of the protein target based on quantifying the amount of oxidation of different regions of a protein. While there have been many advancements in HRPF-FPOP, oxidation measurement still suffers from high variability between measurements. High variability reduces the power statistical power this technique even in the presence of radical dosimetry measurements and …

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Implementation Of The Michael Heggerty Model To Increase Student Achievement Of At-Risk Readers In Kindergarten, Michelle White Nowell Jan 2021

Implementation Of The Michael Heggerty Model To Increase Student Achievement Of At-Risk Readers In Kindergarten, Michelle White Nowell

Electronic Theses and Dissertations

This applied research study seeks to help at-risk readers improve phonemic awareness in kindergarten at Mayberry Elementary by implementing the Michael Heggerty Phonemic Awareness Model so the students can become successful readers. Using three elements in this study, professional development, teacher PLCs, and data talk meetings with peer teachers in kindergarten throughout the year, the researcher sought to build teacher capacity in the implementation of the Michael Heggerty Phonemic Awareness Model to improve student achievement. Surveys, observations, focus groups, and interviews were used in the study. Additionally, the goal of this study aimed to improve the educator's capacity to address …

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The Validity Of Transracialism, Samantha Nichole Priest Jan 2021

The Validity Of Transracialism, Samantha Nichole Priest

Electronic Theses and Dissertations

In this article, the idea that transracialism could be a valid identity is considered. Standpoint epistemology presents the strongest case against transracialism as a valid identity because, according to Collin’s, racial groups have a special sense of a shared history. However, arguments for race as a social construction show how transracialism could function the same way we ordinarily feel like gender functions in our society. The violent disapproval of transracialism highlights both that ordinary usage is being challenged and that it is changing. Ultimately, narrative views of personal identity, like those suggested by Aslidair MacIntyre, and the ordinary function of …

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Mediating Effects Of Mental Health Literacy And Stigma On The Relationship Between Mental Health Status And Psychological Help Seeking Behavior Among Collegiate Student Athletes, Brent Wade Powell Jan 2021

Mediating Effects Of Mental Health Literacy And Stigma On The Relationship Between Mental Health Status And Psychological Help Seeking Behavior Among Collegiate Student Athletes, Brent Wade Powell

Electronic Theses and Dissertations

Student athletes experience unique demands that create specific mental health challenges, yet they tend to utilize mental health services at lower rates when compared to the general student population. Participants were 282 (174 males, 108 females) current NCAA student athletes. A mediated regression was used to determine the mediating effects of Mental Health Stigma (MHS) and Mental Health Literacy (MHL) on the relationship between Mental Health Status and Psychological Help Seeking Behavior (PHS). Results indicated a statistically significant relationship between mental health status and psychological help seeking behavior, R2 = .05, F(1, 280) = 13.74, p < .001. Mental health status predicted PHS (? = -.22, 95% CI [-.11, -.04]). A multiple regression analysis was conducted on PHS based on MHS and MHL, F(2,279) = 9.49, p < .001. MHS was a statistically significant predictor of PHS uniquely accounting for approximately 4.2% of the variance. MHL was not significant and uniquely accounted for .1% of the variance. Analysis of a supported mediation model was conducted using MHS as the single mediator. Controlling for the mediator, the direct effect indicated by the relationship between mental health status and PHS, (? = -.046, 95% CI [-.094, .007], z = -2.04, p = .04), denoting a partial mediation and small effect. The total indirect effects with the mediator was statistically significant, (? = -.028, 95% CI ([-06, -.003]), z = -2.327, p = .02, indicating a moderate effect and accounting for 61% of the model effect. Results from this study can be used to inform program development, institutional supports, and inform further research into reduction of MHS and increasing MHL. Keywords: student athletes, mental health status, mental health stigma, mental health literacy, psychological help seeking behavior

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Design And Synthesis Of Salvinorin-Based Compounds For The Opioid Receptors., Nicholas S. Akins Jan 2021

Design And Synthesis Of Salvinorin-Based Compounds For The Opioid Receptors., Nicholas S. Akins

Electronic Theses and Dissertations

Opioid receptors (OR) are expressed throughout both the peripheral and central nervous system and play crucial roles in the modulation of antinociception, addiction, anxiety, and depression. Salvinorin A, the main isolate of the hallucinogenic plant Salvia divinorum, is one of the most potent naturally occurring kappa opioid receptor agonists. Salvinorin A possesses beneficial effects as a therapeutic in a variety of CNS disorders, but due to its strong hallucinating, anxiogenic effects, and short half-life(t1/2), it has never advanced to clinical trials. Instead, salvinorin A has been used as an important prototype for the development of related drug candidates. Our initial …

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Application Of Passive Air Samplers For Atmospheric Research, And Determination Of Metals In Tree Rings And Marine Sapropel By Icp-Ms, Byunggwon Jeon Jan 2021

Application Of Passive Air Samplers For Atmospheric Research, And Determination Of Metals In Tree Rings And Marine Sapropel By Icp-Ms, Byunggwon Jeon

Electronic Theses and Dissertations

This research focuses on studies of atmospheric mercury (Hg) using passive air samplers (PAS) and studies of trace elements in tree cores and sediment using inductively coupled plasma mass spectrometry (ICP-MS). Mercury is a toxic element that is dispersed globally through the atmosphere. Accurately measuring airborne Hg concentrations aids understanding of the pollutant’s sources, distribution, cycling, and trends. Mercury PAS are designed to capture gaseous elemental mercury (GEM) at a known rate. Compared to active air sampling the low-cost of PAS allows for greater spatial coverage. We used a commercially available Hg PAS (MerPAS®) and observed differences in GEM between …

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The Black Petromodernism Of Zora Neale Hurston: Energy, Race, And Mobility, Stuart Mullet Jan 2021

The Black Petromodernism Of Zora Neale Hurston: Energy, Race, And Mobility, Stuart Mullet

Electronic Theses and Dissertations

This thesis situates Zora Neale Hurston and the folk communities in her oeuvre within the context of modernity’s dependencies on fossil fuels. Such a disciplinary context provides an energy footing for our understandings of African American migrations in the twentieth century—which radically transformed the nation on multiple levels—and it illuminates the communal values that undergird Black approaches to petromodern forms of mobility. Furthermore, by engaging the Black spaces of the South, my argument begins filling a gap in the energy humanities. Few scholars in this field engage deeply those populations and regions that disproportionately experience the underbelly of petromodernity and …

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Executive Functioning And Purpose In Life Among Emerging Adults In College, Alexis Kaylyn Liberto Jan 2021

Executive Functioning And Purpose In Life Among Emerging Adults In College, Alexis Kaylyn Liberto

Electronic Theses and Dissertations

Background: Executive functioning (EF) is a complex neurocognitive concept that grew from the field of neuropsychology and has been explored through various avenues. The most accepted theoretical organization of EF includes a three-factor model that is comprised of inhibition, updating, and shifting. The three-factor conceptualization can be measured through various objective EF neuropsychological assessments and self-reported levels of EF abilities. Goal-planning and organizing cognitive processes are another important facet of EF, as they involve self-regulation abilities. Individuals able to “regulate” themselves behaviorally and move towards goals tend to be more successful and move towards their purpose in life. A facet …

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Electromagnetic Survey Design Using Artifical Neural Networks, Shariful Islam Sharif Jan 2021

Electromagnetic Survey Design Using Artifical Neural Networks, Shariful Islam Sharif

Electronic Theses and Dissertations

Acquiring geophysical information requires selection of the geophysical method based upon the defining physical property and a survey design with adequate resolution but cost effective based upon the size of the area to be surveyed. The objective of this study is to use artificial neural nets (ANNs) to design an optimal survey. The developed approach is tested for the case of soil pipe surveying using electromagnetics. Soil pipes are tortuous voids located within 1.5 m depth of the ground surface. They trend perpendicular to the slope and have cross-sectional dimensions on the order of millimeters to tens of centimeters. The …

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Nonreciprocity Applications In Acoustics And Microfluidic Systems, Masoud Naghdi Jan 2021

Nonreciprocity Applications In Acoustics And Microfluidic Systems, Masoud Naghdi

Electronic Theses and Dissertations

Breaking reciprocity in linear acoustic systems and designing a novel actuator for the nonreciprocal valveless pumps are studied in this dissertation. The first part was started by deriving the acoustic governing equations in a moving wave propagation medium. It was shown thatthe Coriolis acceleration term appears ina cross-product term with the wave vector. It means the main reason for breaking reciprocity in the circular fluid flow is the Coriolis acceleration term. Finally, the governing equations were solved numerically by COMSOL Multiphysics software. Moreover, Green`s second identity was used as a complimentary method to prove breaking reciprocityin such a system with …

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Kindergarten Readiness Through The Lens Of Parent Perspective, Ashley Barrows Goralczyk Jan 2021

Kindergarten Readiness Through The Lens Of Parent Perspective, Ashley Barrows Goralczyk

Electronic Theses and Dissertations

This study utilized a phenomenological approach to explore parent perspectives about kindergarten readiness. Semi-structured interviews were conducted with 10 parents from a public preschool whose children were about to start kindergarten. The parents’ own kindergarten experiences were discussed as well as their perspectives and beliefs about what kindergarten readiness means as it relates to the preparation for and transition into kindergarten. Interview transcripts were analytically coded resulting in findings that were authentic and specific related to personal kindergarten recollections, kindergarten preparedness practices, and assumptions about preschool used as a kindergarten preparation tool. Findings answered the research questions providing specificity about …

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An In-Depth Approach For Functional Oligosaccharide Analysis, Hao Liu Jan 2021

An In-Depth Approach For Functional Oligosaccharide Analysis, Hao Liu

Electronic Theses and Dissertations

Heparin and heparan sulfate (Hp/HS) are linear complex glycosaminoglycans (GAGs), which are involved in diverse biological processes. Although Hp/HS GAGs influence numerous physiological and pathophysiological processes, their high degree of size polydispersity and sequence microheterogeneity make structure-function characterization challenging. In addition, it is hard to understand the structures that underlie any of the various functions with MS, because of the lability of the sulfate group during tandem mass spectrometry (MS/MS) analysis. The work presented here describes an in-depth approach for functional oligosaccharide characterization including chemical derivatization of Hp to inhibit COVID-19 infection, multi-dimensional liquid chromatography (LC) fractionation method, chemical derivatization …

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Development And Characterization Of Albuterol Sulfate Loaded Transdermal Patches With Hme Coupled Fdm 3d Printing, Bhavana Chivukula Jan 2021

Development And Characterization Of Albuterol Sulfate Loaded Transdermal Patches With Hme Coupled Fdm 3d Printing, Bhavana Chivukula

Electronic Theses and Dissertations

Albuterol sulfate is a short-acting selective Beta 2 Adrenergic agonist. It is used to treat and prevent bronchospasm associated with asthma, bronchitis, and other breathing disorders. It is known to show extensive first pass metabolism and it requires frequent dosing which makes it difficult for patients to comply. To avoid these problems, transdermal route of delivery of Salbutamol was explored. Traditional methods of preparation of transdermal drug delivery systems involve the use of solvents and have multiple processing steps. To avoid the usage of solvents and decrease the processing steps, HME Coupled FDM 3D printing can be used. Different polymers …

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Graphene Sand Composites And Their Applications In Water Treatment, Abdulla Nusair Jan 2021

Graphene Sand Composites And Their Applications In Water Treatment, Abdulla Nusair

Electronic Theses and Dissertations

Water scarcity and the emergence of new contaminants are making the world in need of renewable water resources. Slow sand filtration is looked at as an affordable and easy method to filter water with a few weaknesses such as clogging and the inability to remove complex matrix ingredients. To overcompensate these limited weaknesses, graphene-coated sand was studied. Ottawa, concrete, and masonry sand were used, using a reduction method to transform a coating of sugar into elemental carbon in N2 atmosphere at temperatures reaching 750°C. After that, the synthesized materials were activated using sulfuric acid. To verify the effectiveness of the …

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Sustained Delivery Of Moxifloxacin For Ocular Applications., Ruchi Amit Thakkar Jan 2021

Sustained Delivery Of Moxifloxacin For Ocular Applications., Ruchi Amit Thakkar

Electronic Theses and Dissertations

Moxifloxacin is available as a marketed solution (Vigamox(R) which has to be administered 3 or more times a day leading to poor patient compliance and low ocular bioavailability. The overall goal of this research was to use formulation strategies and develop patient compliant dosage forms of moxifloxacin which are sustained-release so as to improve its retention and thereby ocular bioavailability. The first strategy that was explored was to develop sustained release inserts of moxifloxacin hydrochloride using hot-melt extrusion. The inserts showed sustained release and antibacterial activity up to 24h and could potentially be a once-a-day application and improve patient compliance …

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Dynamic Characterization Of Bio-Inspired Functionally Graded Polymer Infused Metallic Foams For Blast And Impact Hazard Mitigation, Damian Stoddard Jan 2021

Dynamic Characterization Of Bio-Inspired Functionally Graded Polymer Infused Metallic Foams For Blast And Impact Hazard Mitigation, Damian Stoddard

Electronic Theses and Dissertations

Current vehicular crashworthy systems and body armor designs are effective in protecting personnel and equipment from disaster due to their energy absorbing characteristics. However, little is understood about how to replicate naturally occurring designs through man-made techniques, and the role of functional grading to further improve the performance of such protective systems. This research investigates an advanced material system analogous to a bio-inspired functionally graded material that will serve as a protective system for the mitigation of dynamic events such as low-velocity impact and/or blast loading.

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Research News. Publications, 2020. Volume 4, Soumyajit Majumdar Dec 2020

Research News. Publications, 2020. Volume 4, Soumyajit Majumdar

Publications (2015-)

Publications that appeared during the period October 1 through December 31, 2020

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Antimalarials And Phytotoxins From Botryosphaeria Dothidea Identified From A Seed Of Diseased Torreya Taxifolia, Mallika Kumarihamy, Luiz H. Rosa, Natascha Techen, Daneel Ferreira, Edward M. Croom, Stephen O. Duke, Babu L. Tekwani, Shabana Khan, N. P.Dhammika Nanayakkara Dec 2020

Antimalarials And Phytotoxins From Botryosphaeria Dothidea Identified From A Seed Of Diseased Torreya Taxifolia, Mallika Kumarihamy, Luiz H. Rosa, Natascha Techen, Daneel Ferreira, Edward M. Croom, Stephen O. Duke, Babu L. Tekwani, Shabana Khan, N. P.Dhammika Nanayakkara

Faculty and Student Publications

The metabolic pathways in the apicoplast organelle of Plasmodium parasites are similar to those in plastids in plant cells and are suitable targets for malaria drug discovery. Some phytotoxins released by plant pathogenic fungi have been known to target metabolic pathways of the plastid; thus, they may also serve as potential antimalarial drug leads. An EtOAc extract of the broth of the endophyte Botryosphaeria dothidea isolated from a seed collected from a Torreya taxifolia plant with disease symptoms, showed in vitro antimalarial and phytotoxic activities. Bioactivity-guided fractionation of the extract afforded a mixture of two known isomeric phytotoxins, FRT-A and …

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Antimicrobial Constituents From Machaerium Pers.: Inhibitory Activities And Synergism Of Machaeriols And Machaeridiols Against Methicillin-Resistant Staphylococcus Aureus, Vancomycin-Resistant Enterococcus Faecium, And Permeabilized Gram-Negative Pathogens, Ilias Muhammad, Melissa R. Jacob, Mohamed A. Ibrahim, Vijayasankar Raman, Mallika Kumarihamy, Mei Wang, Taha Al-Adhami, Charlotte Hind, Melanie Clifford, Bethany Martin, Jianping Zhao, J. Mark Sutton, Khondaker Miraz Rahman Dec 2020

Antimicrobial Constituents From Machaerium Pers.: Inhibitory Activities And Synergism Of Machaeriols And Machaeridiols Against Methicillin-Resistant Staphylococcus Aureus, Vancomycin-Resistant Enterococcus Faecium, And Permeabilized Gram-Negative Pathogens, Ilias Muhammad, Melissa R. Jacob, Mohamed A. Ibrahim, Vijayasankar Raman, Mallika Kumarihamy, Mei Wang, Taha Al-Adhami, Charlotte Hind, Melanie Clifford, Bethany Martin, Jianping Zhao, J. Mark Sutton, Khondaker Miraz Rahman

Faculty and Student Publications

Two new epimeric bibenzylated monoterpenes machaerifurogerol (1a) and 5-epi-machaerifurogerol (1b), and four known isoflavonoids (+)-vestitol (2), 7-O-methylvestitol (3), (+)-medicarpin (4), and 3,8-dihydroxy-9-methoxypterocarpan (5) were isolated from Machaerium Pers. This plant was previously assigned as Machaerium multiflorum Spruce, from which machaeriols A-D (6-9) and machaeridiols A-C (10-12) were reported, and all were then re-isolated, except the minor compound 9, for a comprehensive antimicrobial activity evaluation. Structures of the isolated compounds were determined by full NMR and mass spectroscopic data. Among the isolated compounds, the mixture 10 + 11 was the most active with an MIC value of 1.25 μg/mL against methicillin-resistant …

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Voice Of Guidance To Thousands Of Students, Linda Spargo Retires, Emily Howorth Dec 2020

Voice Of Guidance To Thousands Of Students, Linda Spargo Retires, Emily Howorth

University of Mississippi News

Fixture of the Lyceum served students and families, taught classes and supported university growth

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If You Can Get A Sue, Get A Sue': Keiser Retires From Um, Michael Newsom Dec 2020

If You Can Get A Sue, Get A Sue': Keiser Retires From Um, Michael Newsom

University of Mississippi News

Assistant to the chancellor looks back at storied Ole Miss career

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Vol. 8, No. 1 (2003): Full Issue, Journal Editors Dec 2020

Vol. 8, No. 1 (2003): Full Issue, Journal Editors

Journal X

No abstract provided.

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The Place Where Your Nature Meets Mine: Diane Di Prima In The West, Timothy Gray Dec 2020

The Place Where Your Nature Meets Mine: Diane Di Prima In The West, Timothy Gray

Journal X

No abstract provided.

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Modernist Ghosts, Transatlantic Apparitions: The Waste Land, Simon Hay Dec 2020

Modernist Ghosts, Transatlantic Apparitions: The Waste Land, Simon Hay

Journal X

No abstract provided.

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