Life Sciences Commons^™

Effect Of 1,25(Oh)₂D₃ Glycoside Supplementation Duration On Bacterial Chondronecrosis With Osteomyelitis (Bco) Lameness In Broilers, Zoe R. Zeman

Animal Science Undergraduate Honors Theses

Bacterial chondronecrosis with osteomyelitis (BCO) is a significant cause of lameness in commercial broilers, resulting in substantial animal welfare concerns and economic losses. This study evaluated the effect of 1,25(OH)₂D₃ glycoside supplementation duration on the incidence of BCO-related lameness in broilers. Cobb surplus male broiler chicks were assigned to four treatment groups: a wire-flooring positive control, a litter-flooring negative control, and two treatment groups on litter flooring receiving 1 μg 1,25(OH)₂D₃ as glycosides supplementation per kg diet for either 14 or 28 days. Lameness incidence was recorded from day 22 through day 56, and all lame birds were evaluated for …

Effect Of A Probiotic Microbial Gel Jointly With Two Versions Of Supplemental Direct-Fed Microbials In Receiving Cattle Diets On Growth Performance And Health, John Mitchell

Biological Sciences Undergraduate Honors Theses

The objective was to assess the effect of a probiotic microbial gel (BIOFRESH® Microbial Gel, Agrarian Solutions) administered on arrival in combination with feeding one of two different direct-fed microbials (DFM 365a or DFM 365b, Agrarian Solutions) on the health and growth performance of stocker calves at high risk for bovine respiratory disease (BRD). Beef heifer calves (n = 292, BW = 476 ± 5 lb) arriving on 3 separate receiving dates were used in the 42-day receiving study. On arrival (d -1), heifers were processed, stratified by d -1 body weight, and then assigned randomly to 9 pens (10 …

Structure Of The Spoiie Protein In Clostridioides Difficile, Robert B. Bauer

Biological Sciences Undergraduate Honors Theses

Clostridioides difficile is an opportunistic pathogen responsible for severe gastrointestinal infection. C. difficile-related infection is extremely prevalent in healthcare facilities, causing roughly 30,000 deaths annually in the United States alone. Its main mechanism of virulence is sporulation, which is directed by the SpoIIE protein. This makes SpoIIE an attractive target for the remedy and prevention of infections. The objective of this study was to analyze its structure using both lab techniques and artificial intelligence modeling. A truncated version of this protein, SpoII∆TM, was expressed and analyzed using optimal conditions previously determined in the lab. SDS-PAGE results and analyses confirmed …

From Chaos To Clockwork: Investigating The Role Of Circadian Genes In Metabolic Development Of 2nd And 3rd Instar Drosophila Larvae, Elliott R. Ruegsegger, Stephanie Hood, Amy Poe

Biological Sciences Undergraduate Honors Theses

Circadian clocks regulate daily physiological and metabolic rhythms across many organisms. In Drosophila melanogaster, the molecular clock involving period (per) and timeless regulates gene expression across 24-hour cycles. Circadian rhythms are well characterized in adult, mature organisms, but their emergence during early developmental stages remain poorly understood. In D. melanogaster, the circadian regulation of sleep and feeding rhythms emerges during the 3rd instar larval stage. This suggests that the circadian regulation of metabolism may also arise during this stage. Further, the metabolic consequences of circadian clock disruptions during this developmentally rich period remain unclear. This research aimed to …

Effects Of Cyclic Heat Stress On Blood Cell Profiles And Antibody Concentrations In Broilers Selected For Low Water Conversion Ratio, Luke B. Janski, Chrysta N. Beck, Jossie M. Santamaria, Gisela F. Erf

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Heat stress is a major environmental challenge in poultry production that reduces growth, welfare, and immune function. As global temperatures rise, understanding how genetic selection influences responses to heat stress (HS) is critical for sustainable production. Broilers selected for low water conversion ratio (LWCR) represent a potential strategy for improving resource efficiency; however, their immune response capabilities under HS remain unclear. This study evaluated the effects of cyclic HS on hematological parameters and immune function in LWCR and modern random-bred (MRB) broilers. Birds were reared under thermoneutral conditions (24 °C) or exposed to cyclic HS (36 °C for 8 h …

Prevalence Of Disordered Eating Behaviors In Junior And Senior Human Nutrition And Dietetics Students At The University Of Arkansas, Grace P. Carroum, Mallori Roberts

General Human Environmental Sciences Undergraduate Honors Theses

Disordered eating (DE) is a prevalent concern among college students and may be particularly relevant among nutrition and dietetics students due to their academic focus on food, weight, and health. This study aimed to assess the prevalence and frequency of disordered eating behaviors among junior and senior Human Nutrition and Dietetics students at the University of Arkansas using item-level responses from the Eating Disorder Examination Questionnaire Short Form (EDE-QS). A quantitative, cross-sectional design was employed, and data were collected via an anonymous online survey (n = 11). Descriptive statistics were used to examine the frequency of specific behaviors. Overall, most …

The Effects Of Heat Stress On White Blood Cell Profiles And Antibody Concentrations In Broilers Genetically Selected For Low Water Conversion Ratio Compared To The Modern Random Bred Broiler, Luke B. Janski

Poultry Science Undergraduate Honors Theses

Heat stress (HS) is one of the most significant environmental stressors impacting poultry production worldwide, reducing growth, feed efficiency, welfare, and immune competence. With global temperatures rising, understanding physiological and immunological adaptations to HS is essential for sustainable production. Broiler chickens selectively bred for low water conversion ratio (LWCR) have shown potential for reduced water consumption under environmental challenges; however, their immune resilience under HS conditions compared with modern random-bred (MRB) broilers remains unclear. This study investigated the effects of cyclic HS on red- (RBC) and white- (WBC) blood cells and humoral immunity in LWCR and MRB broilers. Birds were …

Environmental Enrichment Preferences And Play Behavior In Commercial Turkey Hens, Paul Dang

Poultry Science Undergraduate Honors Theses

Commercial turkey production contributes significantly to the U.S. agricultural industry, yet studies on positive welfare indicators, especially play behavior, are limited. This study evaluated turkey hen interactions with two environmental enrichments (straw bales and pecking stones hung from the ceiling) and the expression of play behavior in turkey barns. Three commercial turkey hen barns were equipped with environmental enrichments and time-lapse video cameras. Play behaviors were recorded during transect walks in two barns using 30-second scans of disturbed and undisturbed patches. Regional use of space around enrichments was quantified through region-of-interest (ROI) analysis of time-lapse images collected from days 16-31 …

Exploring Google Trends In Assessing Personal Finance Needs For Cooperative Extension Service Programming, Megan Wells

Graduate Theses and Dissertations

The Cooperative Extension Service (CES) relies on systematic needs assessments to guide program development; yet, traditional approaches often depend heavily on stakeholder input and professional judgment, offering limited insight into consumer level needs. This mixed methods study explored Google Trends as a complementary, consumer driven data source for assessing Family Resource Management (FRM) needs within the Arkansas CES. Grounded in Witkin and Altschuld’s three level needs assessment framework and Uses and Gratifications Theory, the study integrated three data sources representing stakeholders, service providers, and consumers: (1) Family and Consumer Sciences (FCS) advisory committee reports, (2) survey of Family Consumer Science …

The Effect Of Including A Yeast Culture Containing Essential Oils In Receiving Cattle Diets On Growth Performance And Health, Taylor D. Foster, Robin A. Cheek, Elizabeth B. Kegley, Jana L. Reynolds, Alexis J. Harness, Craig M. Looney, Jeremy G. Powell

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

Due to the increased risk of bacterial resistance to antibiotics and the endemic incidence of bovine respiratory disease (BRD) among growing and finishing cattle, alternative strategies must be developed to improve the health of cattle. The objective of this study was to evaluate the use of a supplement containing a yeast culture and an essential oils blend (YEO) on the health and growth performance of stocker calves at high risk for BRD. Crossbred male beef calves (n = 185) received on two separate dates were used in a 42-d study. Within each truckload, calves were stratified by body weight and …

Are Sticky Prices Present In Us Ag Land Lease Rates, John Tyler Blazzard

Graduate Theses and Dissertations

Land is an essential resource in production agriculture. Limited supply and high demand for land have resulted in increasing land values which are a barrier to entry for beginning farmers and ranchers with limited access to capital and credit. One way to overcome the high costs of purchasing land is to lease it. While more affordable than purchasing land, cash rents are also increasing. The objective of this research is to determine whether agricultural cash rents follow farm income symmetrically over time. This is accomplished by implementing Ordinary Least Squares (OLS) regressions with two-way fixed effects which account for rental …

Geospatial Science And The Changing Environment: Applied Methods For Sustainable Agriculture And Landscape Management, Harrison Wakefield Smith

Graduate Theses and Dissertations

Rapid environmental change is disrupting agricultural productivity, ecological function, and the long-term resilience of managed landscapes. At the same time, the rapid growth of geospatial data science has improved our understanding of environmental change and increasingly is being used to improve sustainability in agricultural and environmental management. However, critical gaps remain that limit the applicability of data-driven insights in landscape management. This dissertation investigates the potential of geospatial analytics for sustainable agriculture and landscape management, with a focus on applied methods that operate across spatial and temporal scales. Using field, landscape, regional, and national datasets, it explores the capabilities and …

The Effect Of Including A Yeast Culture Containing Essential Oils In Receiving Cattle Diets On Growth Performance And Health, Taylor Deanna Foster

Animal Science Undergraduate Honors Theses

Due to the increased risk of bacterial populations developing resistance to current antibiotics, consumer perceptions surrounding the utilization of antibiotics use in cattle, and the endemic incidence of bovine respiratory disease (BRD) among growing and finishing cattle, alternative management strategies to improve the health of cattle must be developed. The objective of this study was to evaluate the use of a supplement containing a yeast culture and an essential oils blend (YEO) on the health and growth performance of stocker calves at high-risk for BRD. Crossbred male beef calves (n = 185) received on two separate dates were used in …

Influence Of Increased Supplementation Of Organic-Complexed Zinc To Beef Cows During Gestation: Effects On Preweaning Health Of Offspring, Naija N. Sharpley

Animal Science Undergraduate Honors Theses

The objective of this study was to determine the effect of increasing zinc supplementation from organic-complexed sources to beef cows during gestation on calf performance. In May 2025, during gestation, Angus crossbred cows were confirmed pregnant with female sexed semen (n = 83) and enrolled in the current study. Cows (4.7 ± 2 years of age and 531 ± 84.4 kg body weight, mean ± standard deviation) were allotted to 4 groups (20 to 21 cows/group) based on, sire of heifer calf, cow age, and cow body weights taken at weaning. Assigned groups received 1 of 2 treatments (2 groups/treatment): …

Cholesterol Effect On The P-Glycoprotein Conformational Dynamics, Zane Bunn

Biological Sciences Undergraduate Honors Theses

P-Glycoprotein (Pgp) is a human efflux pump that belongs to the ABC transporter family. This protein consists of two transmembrane domains (TMD) that convert between inward to outward facing configurations to remove a wide variety of structurally different compounds from the intracellular membrane into the extracellular space using ATP.  This non-specific efflux of compounds has brought Pgp to scientific light as having a major role in multi-drug resistance of many diseases, and researchers are focused on developing a deeper understanding of the protein. To further this understanding, this study analyzed how the structure of Pgp is affected by a 10% …

Developing Warning Signage For Harmful Algal Blooms At Lake Fayetteville, Abigail R. Evans

Biological Sciences Undergraduate Honors Theses

The presence of harmful algal blooms (HABs) poses many risk factors for human health, and once microcystin concentration has reached a certain level, that water source will be closed for the duration of the bloom. Agencies tend to use static signage with limited information to inform the public about the current status of the water, but a sign similar to the one used by the National Fire Danger Rating System can allow for constant updates detailing specific risk levels for the public. Using previously reported data on Lake Fayetteville, thresholds for risk factors that are easily measurable were determined. The …

The Genetic Basis Of High Transformation Efficiency In The Model Yeast Saccharomyces Cerevisiae, Mary Kathryn E. Cheek

Biological Sciences Undergraduate Honors Theses

Transformation, a type of horizontal gene transfer, describes the uptake, maintenance, and integration of environmental DNA by cells. Despite the known effects of transformation on evolutionary processes, little is known about the genetic basis of this phenomenon. Saccharomyces cerevisiae is a eukaryote able to transform at quantifiable rates when made chemically competent and treated with a heat shock. S. cerevisiae also has variation in transformation efficiencies between various strains, and high recombination rates allow for sufficient allele “shuffling” in intercross populations. This project utilizes a bulk segregant analysis approach to compare sequencing data between transformant pools and non-transformant pools of …

Exploring Exercise Motivation And Mental Well-Being In College Students, Elaine M. Lindesmith, Anqi Deng Dr

Health, Human Performance and Recreation Undergraduate Honors Theses

This study examined the relationship between physical activity, exercise motivation, and mental well-being among 48 undergraduate students at the University of Arkansas. Guided by Self-Determination Theory, the study used survey data to measure depression, anxiety, physical activity, and open-ended exercise motivation responses. Motivation responses were coded as autonomous or controlled.

Results showed that physical activity was weakly and negatively related to depression and anxiety, but these relationships were not statistically significant. There were also no significant differences in mental health between autonomous and controlled motivation groups, and motivation did not significantly predict mental health outcomes in regression analyses. Overall, the …

Dried Water Treatment Residuals Might Be An Option To Reduce Soluble Reactive Phosphorus Release From Soils, Katie B. Mckay

Biological and Agricultural Engineering Undergraduate Honors Theses

Nonpoint source pollution from agricultural landscapes contributes to freshwater eutrophication, with legacy phosphorus (P) in soils potentially driving soluble reactive phosphorus (SRP) losses to surface waters. The objectives of this study were to evaluate SRP adsorption by dried water treatment residuals (WTRs) produced by Beaver Water District, quantify reductions in soil SRP release across increasing WTR application rates, and compare dried WTR performance to prior WTR studies.

Dried WTRs (~98% solids) were assessed using batch sorption experiments and soil core incubations. Phosphorus sorption was measured by mixing WTRs with CaCl₂ solutions containing increasing SRP concentrations and fitting results to …

Cross-Facility Reliable Deep Learning Based Beef Marbling Assessment Via Unsupervised Domain Adaptation Regression, Samuel Vinson

Biological and Agricultural Engineering Undergraduate Honors Theses

Inconsistent quality grading in beef production leads to inefficiencies, economic disparity, and consumer mistrust. While USDA meat grading traditionally relies on skilled visual inspectors, these human evaluations suffer from cross-facility variability and subjectivity. This paper introduces the first known application of unsupervised domain adaptation regression for cross-facility beef marbling score prediction—an innovation that improves generalization across diverse environments in the beef supply chain. Utilizing numerical scores ranging from 100-900, the research employed convolutional neural networks (CNNs), including ResNet, VGG, and AlexNet architectures. The study specifically introduced and validated a unified unsupervised domain adaptation regression method using the ResNet-50 architecture to …

Preserving The Past: Exploring The Last Frontier's Ecosystem Shifts And Biodiversity Of The Tallgrass Prairies, Gisell Maldonado, Amelia Villaseñor

Anthropology Undergraduate Honors Theses

In North America, grasslands are a cornerstone of the environment. Historically, the tallgrass prairie was expansive and reached from Manitoba in Canada to Texas. Today this unique ecosystem is highly fragmented and reduced, but it remains an important ecosystem for biodiversity and cattle management. While there are many complex ecological interactions in the prairie, recent research shows that large herbivores are vital in maintaining grasslands through grazing and other behaviors that reduce woody encroachment and support nutrient cycling. Here, we examine cow and bison dietary behaviors and connect these to the ecosystem services provided by these large herbivores. In the …

Historical Comparison Of Bridal Fashion Symbolism: Contrasting Queen Elizabeth Ii, Princess Diana, And Catherine, Princess Of Wales, Rebecca O'Dea

Apparel Merchandising and Product Development Undergraduate Honors Theses

The purpose of this study was to gain understanding and insight into the profoundness behind the practice of dress. Throughout history, royal attire has been used to demonstrate aspects about the individual and regency. Royal fashion served as an excellent area to narrow in on, due to the influential status, and high standards expected of their appearance and actions. This research project studied members of British royal family, Queen Elizabeth II, Princess Diana, and Catherine, Princess of Wales, and analyzed fashion elements of their wedding dresses. The examination of bridal fashion was conducted through thematic framework determining if the concepts …

A Q-Methodology Study Of How Viewers Within The Southeastern Circuit Perceive The Future Of The Western Sports Industry, Molly Mckettrick

Graduate Theses and Dissertations

Western Sports occupy a unique position within American Culture, reflecting traditions rooted in agricultural communities and livestock practices, while also evolving as contemporary spectator events. Despite the growing visibility of Western Sports through media coverage on various digital platforms, there is limited research on how general audiences perceive the sport, which is the purpose of this study: to examine how viewers perceive the sport. This study examines viewer perspectives regarding the sport across various digital platforms, due to limited research on how general audiences perceive the sport while employing Q-Methodology to identify shared perspectives among spectators. A total of forty …

Conservation Wins And Woes: A Meta-Synthesis Of Ecotourism Impacts On Primates And Local Communities, Madison Lanie Mckinniss

Graduate Theses and Dissertations

Biodiversity assessments identify 612 extant species of primate, but ~50% of these species are at risk of extinction. Threats include agricultural and industrial production, urban development, and poaching. As concerns have grown regarding impacts on the environment, researchers have proposed ecotourism as a tool for conserving ecosystems while improving human welfare. Although conservation initiatives are pursued at these ecotourist sites, the presence of humans can cause additional influences on non-human primates (NHP). Primatologists have posed questions regarding implications of ecotourism on NHP, but research remains scarce. This study will investigate the practices executed at ecotourist sites where endemic NHPs reside. …

Sensing Rna’S Conformation With A Solid-State Nanopore Device At Various Ph And Temperature, Haopeng Li

Graduate Theses and Dissertations

This study uses solid-state nanopore technology to investigate the stability and dynamics of RNA molecules under thermal stress and pH fluctuations. Two distinct mRNA samples were analyzed: (1) heat shock protein (HSP)-encoding mRNA extracted from Sulfolobus solfataricus P2, a thermophilic archaeon inhabiting extreme environments such as geothermal sulfuric hot springs (pH < 4, temperature range: 65–90°C), and (2) total RNA extracted from White Leghorn chickens, which thrive under standard physiological conditions. ΦX174 virion single-stranded DNA (ssDNA) were included as a comparative reference. Nanopores, fabricated in silicon nitride membranes, were used to electrically characterize the structural properties of individual RNA molecules in solution, close to their native environments. The nanopore membrane separates two chambers containing salt buffer solution, where ionic current is the primary measurement parameter. When a voltage bias is applied across the membrane, ion flow and an ionic current can be measured. Charged RNA molecules driven translocation through the nanopore induces pore resistance changes, resulting in detectable current blockade events. Variations in these events provide insights into RNA secondary structure and conformational dynamics. By systematically altering pH and temperature, this study elucidates the effects of environmental stressors on RNA stability and structural integrity. The findings reveal distinct responses between thermophilic HSP-encoding mRNA and mesophilic RNA, underscoring the adaptive mechanisms of thermophilic RNA under extreme conditions. These results contribute to a better understanding of RNA behavior under stress and establish a foundation for future applications in RNA-based diagnostics and biotechnology development.

Long-Term Stimulant Use Is Associated With Normalized White Matter Integrity In The Vta-Nacc Pathway In Adolescents, Isaac T. Arsenault

Biological Sciences Undergraduate Honors Theses

Medical practitioners are diagnosing Attention-Deficit/Hyperactivity Disorder (ADHD) at a high and ever-increasing rate. The use of stimulant medication to treat ADHD is also increasing and is associated with changes in the brain. Past research found that children with ADHD have lower volume in reward neurocircuitry, such as the ventral tegmental area (VTA) and the nucleus accumbens (NAcc). Research has also found that stimulant usage in those with ADHD might “normalize” the reward circuits. However, few longitudinal studies have directly tested the long-term effects of stimulant medication on brain development. Here we tested whether long-term stimulant use is associated with changes …

Dfend: A Nutrition Education Intervention To Improve Food Budgeting, Shopping, And Meal Preparation Skills Among Adults In Arkansas, Samantha K. Edwards

Human Nutrition and Hospitality Management Undergraduate Honors Theses

Preventive strategies targeting modifiable lifestyle factors related to food, nutrition, and health are needed as chronic health conditions continue to rise. Nutrition literacy refers to having the knowledge and skills needed to obtain, understand, and apply nutrition information to make informed dietary decisions. Without adequate nutrition education and food security, vulnerable populations are at risk of malnutrition and poor dietary behaviors. Educational interventions that increase food literacy can help improve dietary choices and food selection skills.

The purpose of this creative project was to develop a nutrition education toolkit for Extension agents to implement among rural populations with low health …

Leveraging Historic Collections: Investigating Morphometric Differentiation In Members Of The Arisaema Triphyllum (L.) Schott (Araceae) Species Complex, Morgan Bradley Russell

Graduate Theses and Dissertations

The Jack-in-the-pulpit (Arisaema triphyllum (L.) Schott) is an herbaceous perennial herb of North America, and its taxonomic history is full of confusion and rank shifts. Now split into six species, the A. triphyllum species complex consists of morphologically similar taxa that have differing ploidy levels. In Chapter I, I compiled a detailed introduction and history for these taxa, focusing on their taxonomic complexity and morphological ambiguity in herbarium specimens and immature plants. I also presented their ploidy distinctions and how the implications of polyploidy may hold answers to parsing them apart, especially in dried herbarium specimens where defining characteristics are …

Impact Of Salt Block Utilization During Dry-Aging On Pork Loin Microbial And Meat Quality, Cason H. Frisby

Food Science Undergraduate Honors Theses

This study aimed to investigate the effects of dry-aging and salt block utilization during dry aging on pork loin quality attributes. Pork loins were collected at 7 days postmortem, cut into three equal sections, and randomly assigned to wet aging (WA), traditional dry-aging (DA), and salt block dry-aging (SDA) groups to be aged for 28 days. During the dry-aging period, SDA cabinet exhibited lower humidity fluctuation (Avg. 71.52, St. Dev. 4.7) compared to DA cabinet (Avg 70.76, St. Dev. 7.9). Following the aging period, no differences were found in pH or Warner Bratzler shear force values between treatments (P>0.05). …

Precision To Protein: Comparative Characterization Of Printability, Physicochemical, And Nutritional Properties Of Cricket, Pea, And Whey Proteins In 3d-Printed Nutrition Bars, Sophia Hinkebein

Food Science Undergraduate Honors Theses

Protein is a priority nutrient in the American diet, being fueled by the demands of weight loss drugs, diet culture, and new dietary guidelines. However, meeting these elevated protein goals sustainably requires diversifying beyond standard sources like whey protein isolate. 3D printing offers an opportunity to present a variety of protein sources in a palatable, customized, and consumer-acceptable format. In this study, 3 protein sources (cricket, whey, and pea), were optimized within food inks for 3D printing. Optimization involved different hydration levels, with whey requiring 7 grams of added water, cricket 22 grams, and pea the most at 47 grams. …