Digital Commons Network^™

Establishing An Objective, Quantifiable Method For Detecting Erosive Tooth Wear, Camille Kita

Biological Sciences Undergraduate Honors Theses

This study aims to monitor and evaluate erosive tooth wear (ETW) by measurement of enamel surface thickness and texture in a clinical setting. The objective approach is fundamentally different from the standard subjective visual assessment that professionals in the dental field using the Basic Erosive Wear Evaluation (BEWE) method.

Twenty-nine hyposalivation and three control subjects were used in this longitudinal study, for a total of 597 samples (only 577 teeth were eligible for surface texture analysis) evaluated in a longitudinal study including both baseline and 12 month follow up surfaces. Each participant’s buccal surface of the tooth was first analyzed …

Improving Fertility: Evaluating The Addition Of Prednisone To Enhance The Effectiveness Of Clomid And Femara In Anovulatory Patients., Jeffrey Bradford

Biological Sciences Undergraduate Honors Theses

Chronic Anovulation and PCOS is a major infertility issue that affects the ability of many female patients to conceive and obtain a pregnancy. General anovulation is influenced by a combination of factors such as hypoandrogenism, hormonal imbalances, and an irregular menstrual cycle. The current methods of treatments include the usage of first-line medications such as Clomid and Femara or more expensive options such as menotropin regimens, Intrauterine Insemination (IUI), or In Vitro Fertilization (IVF). While Clomid and Femara remain the most common and successful method, an estimated 25% of general anovulation patients will fail to ovulate despite a maximum dosage …

Growth Of Methanogens On Kaolinite, A Clay That Has Been Identified On Mars, Hailey Littrell

Biological Sciences Undergraduate Honors Theses

Methanogens have been studied as a model for life on Mars for 28 years now in the Kral lab. The discovery of methane in the Martian atmosphere by ground-based and orbital observations as well as Curiosity Rover (Formisano, V. et al., Krasnopolsky, V.A. et al., Mumma, M.J. et al.) has added relevance to these types of studies. Methanogens were chosen due to their ability to live in harsh environments, very similar to the Martian terrain. In addition to methane in the atmosphere, phyllosilicate clays have also been identified. One of those clays is kaolinite. Kaolinite has been found to not …

Characterization Of Mitochondrial Morphology In Drosophila: Early Embryogenesis Description Via Confocal Microscopy, Kendall Miller

Biological Sciences Undergraduate Honors Theses

Mitochondria are not static organelles, but instead are dynamic networks that undergo rapid changes in subcellular distribution, organization, and activity in response to external stimuli. Notably, mitochondria can undergo fission and fusion, collectively known as mitochondrial dynamics. Mitochondrial fusion creates assembled networks of mitochondria that are maximally efficient at generating ATP through oxidative phosphorylation. Conversely, mitochondrial fission leads to network fragmentation and a shift towards glycolysis, which is the dominant mode of ATP generation in oxygen-limiting and stressed conditions. While mitochondrial dynamics have been intensively studied in isolated cells under stressful conditions, much less is known about how mitochondria behave …

Dorsal Root Ganglia Neurite Outgrowth Following Traumatic Spinal Cord Injury Repair: A Review, Adrienne Vaughan

Biomedical Engineering Undergraduate Honors Theses

Traumatic spinal cord injury (tSCI) can cause partial sensorimotor deficiency or total dysfunction, rendering patients unable to perform necessary tasks and dramatically decreasing their quality of life. tSCI is a very prevalent issue. In the United States alone, there are approximately 54 new cases of SCI per one million people each year, or 18,000 new cases annually. tSCI creates a lesion gap filled with axon-inhibiting fibrotic scar tissue. Comprehensive functional recovery following traumatic spinal cord injury (tSCI) requires axonal regeneration across wound site lesions. Dorsal root ganglia (DRG) neurite outgrowth is often evaluated in PNI therapeutic research since it can …

Optimization Of Collagen And Cell Concentrations For Engineered Tissues, Avery Fiser

Chemical Engineering Undergraduate Honors Theses

Improvements regarding the drug discovery process are necessary due to less than 1% of drugs making it from the initial discovery phase to patient treatment in clinics. One method of enhancing this process involves improving the relevance and dependability of in vitro testbeds utilized during pre-clinical testing. Improvement along these factors can provide a more relevant view for eventual drug behavior in patients. This additional relevance can allow for a reduced timeline in drug development for improving patient care. A consistent and morphologically sound baseline engineered tissue is vital to the creation of successful experimental models. Parameters such as cell …

As You Lay There In Your Blood, Eden Shulman

Graduate Theses and Dissertations

As You Lay There in Your Blood is a novel consisting of six interconnected stories, as well as a novella. The novel follows Levi Sterne, a Jewish bodybuilder in rural Colorado, who deals with issues surrounding mental illness, family history, and the legacy of trauma. The novel explores themes of religion—particularly contemporary modes and forms of Judaism—as well as the relationships people develop from traumatic and difficult pasts. The novel follows Levi from his childhood and details the moment at which, at age 15, he’s abandoned by his mother. The stories then follow other important moments in Levi’s life, including …

Thematic Mapping Of Apidae Holdings Within The University Of Arkansas Arthropod Museum, Baylie Lenora Day

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

Museum biological collections store species data that can be utilized in research on biodiversity, environmental change, invasive species, public health, and disease. The University of Arkansas Arthropod Museum, which began in 1905, houses over 750,000 specimens and has not yet been digitized. Making data publicly accessible via the internet makes the data available to the entire scientific community. The goal of this project was to create a digital resource to allow greater access to the University of Arkansas Arthropod Museum holdings. To do so, data from Bombus (bumble bee) and Xylocopa (carpenter bee) specimens were databased in Excel and displayed …

Atmospheric Deposition Trends Are Primarily Decreasing In Arkansas And Tennessee, Anna Mccarty

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

Atmospheric deposition has likely changed with the influence of increasing global temperatures and subsequent changes in precipitation across the United States and globally. The objective of this project was to analyze atmospheric deposition across northern Arkansas and Tennessee. The three specific objectives were to: i) evaluate trends in atmospheric deposition of various element/compounds, ii) assess the relationship between atmospheric deposition and rainfall, and iii) evaluate if rainfall-adjusted atmospheric deposition is changing over time. Six sites were analyzed from 1980 to 2022, including AR16, AR27, TN00, TN04, TN11, and TN14, which span over northern Arkansas and across Tennessee. The Mann-Kendall Test …

Screening For Potential Swine-Origin Probiotics With Antimicrobial Activities, Christina Lim

Animal Science Undergraduate Honors Theses

The prevalence of antibiotic resistant bacteria is a leading issue worldwide. Recently, there was a new law banning the use of antibiotics within the swine industry. For decades swine producers have mixed subtherapeutic amounts of antibiotics in swine feed to prevent potential infections and to increase growth rate. However, due to the constant exposure of antibiotics to these ever-evolving pathogens, the population of antibiotic resistant bacteria has increased exponentially. Currently, the swine industry is scrambling to find a suitable alternative to antibiotics that possesses antimicrobial activity and potentially promotes growth. The objective of this study was to investigate the ability …

Effects Of Maternal Infant-Directed Sensory Cues On Early Weaned Piglet Behavior, Mattie Still

Animal Science Undergraduate Honors Theses

In the commercial pig production industry, weaning is a stressful time. Stress is related to loss in production due to increased incidence of illness, increased aggression, and reduced rate of gain, which results in economic losses for the producer. The purpose of this continuous behavior study was to explore the effects of provisional own-mother olfactory and auditory stimuli on early weaned piglet behavior and growth. During days 7-14 postpartum, the grunting of 12 individual sows was recorded while their piglets nursed. The audio files were put into a single loop with grunting occurring for 20 minutes followed by 60 minutes …

Heuristic Expectations Of The Cinderella Effect As A Function Of Sexual Dimorphism In Men's Facial Structures, Lindsey Eagan

Psychological Science Undergraduate Honors Theses

Masculinized male faces have an ambivalent signal value, wherein perceivers recognize various coalitional benefits and costs. Within parenting domains, masculine men could afford protection toward their offspring despite potentially using more aggressive behaviors toward them. Nonetheless, the benefits of masculine fathers could be limited to their biological children while the costs toward stepchildren would be greater. Perceivers could develop implicit theories about parental behaviors as a visual corollary of the Cinderella Effect, or stepchildren’s greater vulnerability to abuse. Participants evaluated a series of masculinized and feminized male faces described as either biological parents or stepparents in domains related to positive …

Functional Stereotyping Of Women’S Self-Objectification As A Function Of Life History And Body Fat, Vienne Howay

Psychological Science Undergraduate Honors Theses

Individuals prioritize different goals as a function of stability in their environment, oftentimes leading people to prioritize reproduction in hostile ecologies. From this shift in priorities, perceivers could develop heuristics about how women may attempt to attract mates. Previous research suggests that higher levels of body fat are more attractive to men with a fast life history. With this awareness of men’s preferences in body fat, high-fat women from hostile ecologies could be expected to engage in more self-objectifying behavior in the service of mate attraction or attempting present themselves as objects of affection to men. This study tasked participants …

Gaseous Ozone To Improve The Microbial Safety Of Spices, Seeds, And Nuts, Arshpreet Kaur Khattra

Graduate Theses and Dissertations

Due to the increasing number of reported outbreaks of pathogens in low-moisture foods (LMFs), there is a need to investigate novel non-thermal gaseous technologies to increase the microbiological safety of spices, nuts, and seeds without compromising the product quality. The objective of this study was to inactivate Salmonella spp. in different spices, seeds, and nuts using gaseous ozone treatment and evaluate the suitability of Enterococcus faecium as a potential surrogate for Salmonella. Each food product (dried basil leaves, black peppercorn, chia seeds, and walnuts) was separately inoculated with a 5-strain Salmonella and E. faecium cocktail and equilibrated to water activity …

Determination Of Factors Influencing Microbial Food Safety Risks Of Additive Manufacturing And 3d Printing Of Food, Allyson Nichole Hamilton

Graduate Theses and Dissertations

The burgeoning field of 3D food printing introduces opportunities for customizing the physicochemical properties of food, offering tailored solutions in color, shape, and texture. Despite its potential, the implications of this technology on food safety, particularly the efficacy of manufacturer-recommended cleaning protocols for stainless steel food ink capsules, the transferability of pathogens from a contaminated food ink capsule into the food ink based on macronutrient composition of the food, and the impact of storage conditions on pathogen viability, have not been thoroughly investigated. This dissertation provides a comprehensive analysis of these aspects, focusing on the control of foodborne pathogens and …

Evaluating The Association Between Daily Fluctuations In Sleep And Blood Pressure, Mara Egeler

Graduate Theses and Dissertations

Hypertension is a major contributing factor for heart disease, with nearly half of US adults meeting criteria. While studies have begun to examine the relationship between insomnia and blood pressure (BP), little is still known regarding the relationship between daily fluctuations in sleep and BP. This study aimed to provide further clarification on the role insomnia plays in the development of hypertension, including the impact that daily fluctuations in sleep have on fluctuations in BP. Participants included 61 adults from the greater Northwest Arkansas area (63.9% White, 67.2% Female, 30-79 y) who completed 10 consecutive days of sleep and blood …

Identifying Grassland Cores In The Southeast: Relating Spatial Covariance To Avian Communities And Vegetation Structure, Lauren L. Berry

Graduate Theses and Dissertations

Globally, grasslands are declining in range, which is leading to a decline in grassland-dependent taxa. These declines can be attributed to a variety of issues, a major one being the encroachment of woody species into historic grasslands. There is a new framework for strategizing grassland management, referred to as “Defend the Core,” which calls for proactive management of intact grasslands, meaning conserving remaining grasslands by preventing woody encroachment in the first place. To successfully defend the core, it is imperative that we develop rapid methods to identify intact grassland cores for management priority. One method that can be used for …

Migration And Breeding Ecology Of King Rails (Rallus Elegans) In Southeast Arkansas, Jessica Schmit

Graduate Theses and Dissertations

King Rails (Rallus elegans) are a secretive marsh bird species of conservation concern in Arkansas. Freddie Black Choctaw West WMA in southeast Arkansas has multiple confirmed pairs of breeding King Rails and offered an opportunity to investigate King Rail migration ecology, as well as nesting ecology and nest site selection. In Chapter 1, we determined migratory status (resident vs. migratory) and described seasonal movement. To do this, we captured and outfitted 23 birds with Argos GPS tags to track migration patterns throughout the season. We found that most of the population did not make long distance migrations but instead were …

Bilateral Asymmetry In The First Metacarpal: The Influence Of Handedness In Humans And Non-Human Primates, Lucyna A. Bowland

Graduate Theses and Dissertations

Muscle attachment sites (entheses) are often used to infer soft tissue anatomy and reconstruct behaviors within skeletal populations, but there remains a significant debate about whether and to what degree muscle use is accurately reflected in bony morphology. One of the most difficult problems in establishing the relationship between variation in muscle use and entheseal development is the inability to exclude a variety of external factors thought to influence enthesis development, including age, sex, body mass, and activity patterns. One way around this is to take advantage of the fact that humans are handed (preferentially using one hand over another, …

The Water That Will Be: A Qualitative Look Into The Effects Of Visual Imagery On Participation In Water Conservation Initiatives, Shane Martin White

Graduate Theses and Dissertations

This dissertation explored the role of visual imagery in water conservation initiatives, focusing on its impact on public understanding, emotional connection, and willingness to participate. Drawing from the Theory of Planned Behavior and Affective Disposition Theory, the study investigated how art interventions can enhance comprehension and engagement with water conservation easements. Utilizing qualitative methods, including interviews, focus groups and PhotoVoice, data was collected from stakeholders in the Illinois River Watershed region. The research examined current levels of understanding regarding conservation easements, evaluated the effectiveness of visual imagery interventions in enhancing public awareness, and identified the potential for collaborative approaches between …

Investigations Into The Expansion Of Breslow-Type Intermediate Reactivity Via Radical C-N Bond Homolysis, Jacklyn J. Kubik

Graduate Theses and Dissertations

The Breslow intermediate is a key intermediate in catalytic transformations like the benzoin condensation and Stetter reaction. These intermediates were first postulated by Ronald Breslow in 1958. Since then, a number of researchers have sought to prove their existence and expand upon the reactions possible using these intermediates. In the sixty plus years since this intermediate was first postulated the reaction scope has expanded significantly, Breslow and breslow-type intermediates have expanded to encompass benzothiazoles, imidazoles, benzoimidazoles, triazoles, thiadiazoles, diamino type structures, and most recently pyridine structures. The expansion of these reactions has opened up new avenues of exploration and previously …

Beyond The Bedroom Door: Investigating Representations Of Sex In Young Adult Literature, Amelia Gutche

English Undergraduate Honors Theses

This thesis examines representations of sex in young adult (YA) fiction, focusing on negative patterns, empowerment, and healthy relationships. Through analysis of seven YA novels and existing scholarship, three research questions are addressed: the evolution of sexual representations in the twenty-first century, patterns characterizing teenage sexual situations, and distinctions between healthy and unhealthy relationships. Findings reveal a shift toward more inclusive and empowering depictions, yet lingering conservative values and silences persist. YA literature often portrays sex as a source of fear and obsession, limiting adolescent power and perpetuating unrealistic ideals. Healthy relationships are characterized by support systems, mutual respect, and …

Examining The Effects Of Menstrual Cycle Phase And Hormonal Contraceptive Use On Women's Sleep, Charles Ethan Coombs

Psychological Science Undergraduate Honors Theses

Women overrepresent men for sub-optimal sleep, a consequence of hormone fluctuation in the menstrual cycle affecting sleep regulatory pathways. While research has examined the prevalence of sub-optimal sleep through cycle phases, little research has examined how hormonal contraceptives (HC’s) could similarly affect women’s sleep, while also neglecting to utilize subjective sleep measures. In this study, we examine subjective sleep quality among naturally cycling (NC) women, women using different HC types, and between active and inactive phase pill users by subjecting 463 women to a subjective sleep battery. We hypothesized that HC users would report more sub-optimal sleep than NC women. …

Believe In Yourself And Keep The Doctor Away: Health Self-Efficacy Mediates The Relationship Between Retrospectively Reported Adverse Childhood Experiences (Aces) And College Students’ Current Self-Reported Physical Health, Amber Sale

Psychological Science Undergraduate Honors Theses

Adverse childhood experiences (ACEs) are potentially traumatic events occurring during the first 18 years of life (CDC, 2022) and are strong predictors of later negative outcomes such as poor physical health, risky health behaviors, and poor lifestyle habits (Felitti et al., 1998; Lovis-Schmidt et al., 2022; Windle et al., 2018). Previous literature has suggested that self-efficacy may explain the negative impact ACEs have on later physical health (Sachs-Ericsson et al., 2011). Therefore, the present study examined the relationship between college students’ retrospectively reported ACEs and current self-reported physical health, in the context of health self-efficacy levels (i.e., self-perceptions of one’s …

Functional Biases Toward Formidable Men In Legal Domains, Bridget O'Neil, Mitch Brown

Psychological Science Undergraduate Honors Theses

The recurring threat of physical aggression throughout human evolutionary history presented a selection pressure that favored perceptual acuity threatening people. One heuristic of threat is men's formidability, often indexed by upper body strength. Although functional, such responses could be mismatched with demands of the U.S. legal system. The demands of a fair legal system could be at odds with ancestrally informed motives that serve to mitigate harm, a bias that has previously been demonstrated to increase sentencing length based on features deemed aggressive. This study extends previous findings by focusing on men's upper body strength while assessing how specific motivations …

The Determination Of Macrophage Localization In Muscle Injuries Using Spatial Transcriptomics, Julliana Renales

Biomedical Engineering Undergraduate Honors Theses

The repair of traumatic muscle injury is often a long process which can in many cases be insufficient and incomplete. In such cases, scar tissue may form, leading to high risk of re-injury and the prevention of muscle regeneration. An important part of decreasing this risk is gaining a better understanding of the cellular complexities of injury repair. More specifically, macrophage cells are an important piece in the regulation of inflammation and repair. In this project, computational analysis spatial transcriptomic data was performed to examine mouse muscle injury and its development over time. This analysis was used to examine the …

Clinical Assessment Of Erosive Tooth Wear Objective Outcome Measures, Elizabeth Wewers

Biological Sciences Undergraduate Honors Theses

The purpose of this study was to determine whether enamel surface texture can be used as objective and quantitative measurements to detect and monitor erosive tooth wear (ETW) as an adjunct to the subjective Basic Erosive Wear Evaluation (BEWE) that is commonly used today. This longitudinal observational clinical study enrolled 32 subjects with a sample of n = 584 teeth. Conventional dental microwear surface texture parameters (surface complexity, roughness, and anisotropy - Asfc, Sa, Str, respectively) (were generated using white-light scanning confocal profilometry) from the buccal surfaces of each tooth accepted to the study. I personally scanned and analyzed n …

Investigation Of Early Stage Wound Healing In Volumetric Muscle Loss, Sean Ong

Biomedical Engineering Undergraduate Honors Theses

Volumetric muscle loss (VML) refers to the substantial removal of tissue from skeletal muscle due to surgery or lesions. This condition disrupts the normal regenerative process of injured muscles, leading to significant loss of muscle function. This study examines the progression of VML injury, approximately 20% of the muscle mass being removed, in the tibialis anterior (TA) muscle of a mouse model over a 15-day post-injury period. The injured muscles exhibited discoloration indicative of reduced blood flow and experienced a decrease in muscle mass throughout the study duration. Furthermore, the maximum force output of the injured TA was significantly lower, …

Do Heat Waves Drive Natural Selection In Damselflies?, Adam Baranyk

Biological Sciences Undergraduate Honors Theses

Climate change has led to changes in both mean temperatures and temperature extremes over the recent years. These changes have had differential effects on animals throughout the world. Ectotherms depend on their external environment for thermal regulation, making them especially susceptible to temperature extremes. It is not yet clear whether there is a relationship between physical traits in ectotherms, and survivorship throughout a heat wave. That is, whether or not temperature extremes driven survival selection. In this study, a heat wave was simulated artificially using thermally regulated mesocosms at different temperatures (18°C, 22° C, 26° C, 30° C) with a …

Mate Guarding Against Strong Men Displaying Affiliative And Aggressive Humor, Jacob Pauley

Biological Sciences Undergraduate Honors Theses

Mate retention behaviors serve to discourage partner defection from a current pairbond. Such behaviors are oftentimes more prevalent toward intrasexual rivals exhibiting physical and behavioral cues implicating that rival as an optimal mate. Among these features in men are their upper body strength, a feature diagnostic of heritable fitness, and men's ability to produce humor, a cue to their social competence. This study considered the intersection of these desirable features in shaping men's mate retention behavior toward an intrasexual rival. After learning of a hypothetical interloper exhibiting high or low upper body strength while similarly using humor in an affiliative …