Digital Commons Network^™

Broiler Breeder Amino Acid Levels And Progeny Nutritional Status, Leasea Butler

Graduate Theses and Dissertations

Crude protein needs of chickens have changed due to genetic line differences and selection of those lines for differing broiler traits. Standard commercial broiler strains have been selected to be used to meet multiple processing categories typically at live body weights less than 3.5 kg. In the last two decades high-yielding broiler strains were introduced into the commercial market. These breeds are known as the Cobb 700 and Ross 708. The works included within are focused on the Cobb 700 high-yielding broiler strain, and its response to crude protein, with emphasis on digestible lysine.

Eat Better Move More: Educational Program Teaching Healthy Eating Habits To Low-Socioeconomic Elementary School Students, Megan March

The Eleanor Mann School of Nursing Undergraduate Honors Theses

Obesity is a growing problem and has shown no signs of improvement over the past decade, with an estimated one in five children between the ages of six and seventeen are overweight. This problem is even more prevalent in ethnic minorities and socioeconomically disadvantaged families. The purpose of this study was to examine the effects of the EBMM program nutrition module on 4th and 5th grade student’s food choices. The study was conducted at an elementary school in Northwest Arkansas. A convenience sample of 4^th and 5^th grade students was chosen to participate in the study. Nursing students …

Autofluorescence To Study The Effects Of Acid Concentration On Cellular Metabolism In Vitro, Robin L. Raley

Chemistry & Biochemistry Undergraduate Honors Theses

Ultraviolet (UV) radiation-induced sunburns and their accompanying afflictions are a growing public health concern in the United States. There is a need for techniques that can accurately and non-invasively characterize the physiology of sunburned skin tissue directly after UV-damage and applying a topical skin treatment to relieve pain and promote healing. Two-photon excited fluorescence (TPEF) microscopy and fluorescence lifetime imaging (FLIM) can be used to investigate metabolic processes in live cells through endogenous fluorescence of the cofactors, NADH and FAD. These methods employ the optical redox ratio of FAD/(NADH+FAD), mean NADH lifetime, and the separation of the free and bound …

Development Of A Model For Accelerated Fatigue Testing In Venous Valves, Olga Brazhkina

Biomedical Engineering Undergraduate Honors Theses

Malfunctioning venous cause issues ranging from cosmetic to life threatening situations for millions of people in the U.S. (1). Venous valve bioprosthetics often fail due to a loss in leaflet tissue flexibility following chemical fixation of donor tissue (2). A viable solution for testing venous valves prior to and post chemical fixation is in high demand for the development of a more durable prosthetic replacement. As a result, this research aims to create a fatigue apparatus that provides a means to model the durability of venous valves. The design criteria for this project included modeling physiological conditions in an accelerated …

Disease And De Soto: A Bioarchaeological Approach To The Introduction Of Malaria To The Southeast Us, Kelly Marie Schaeffer

Graduate Theses and Dissertations

It is well known through documentation in historical accounts that numerous diseases were introduced to the Americas during the time of Spanish and French exploration. Diseases such as smallpox, measles and yellow fever have been credited in playing a role in the Spanish conquest of the New World through drastic Native American population decline. Many researchers have studied the biological consequences of European contact, some using direct skeletal analyses to study changes in Native American health and disease. However, one major population disease that has not been part of these discussions is malaria. This is mostly due to the current …

Interactions Between The Protein Industry And Blogs: An Analysis Of Content And Perceptions, Kylie Hackworth

Graduate Theses and Dissertations

This thesis contains two articles that describe and characterize the use of the social media platform of blogging in the context of the animal agriculture and protein industry. The first article used content analysis to analyze blog posts and look for themes throughout the posts. This study included 37 posts from ten authors and resulted in four recurrent themes. The major themes were environment, consumption of protein, alternative protein source, and alternative dieting. The tones regarding these themes were both negative and positive toward the protein industry.

The second article used hand-coding to look for themes and similarities concerning flow …

The Acute Effects Of Citrulline Malate And Bonded Arginine Silicate Supplementation On Vasodilation Of Young Adults, Jeffrey Rogers

Health, Human Performance and Recreation Undergraduate Honors Theses

Abstract

Background

Clinicians, professional athletes, and recreational athletes are interested in supplementation that up-regulates nitric oxide (NO) production in blood vessel endothelium, increasing arterial vasodilation. Benefits from these supplements include improvements in blood pressure, muscle hyperemia, and exercise performance. Citrulline Malate (CM) is a pre-workout ingredient, popular for its ability to increase exercise performance and blood serum concentrations of L-arginine, resulting in NO production. Recently, Inositol-Stabilized Arginine Silicate (ASI, Nitrosigine) has been added to many of the most popular pre-workout blends, following a group of studies showing ASI increases serum arginine and reduces post-workout muscle damage. Research has yet to …

Effectiveness Of Titanium And Iron Nanoparticles In Treating M. Aeruginosa For Harmful Algal Bloom Remediation, Natalie Von Tress

Biological and Agricultural Engineering Undergraduate Honors Theses

Harmful Algal Blooms (HABs) are a growing issue worldwide, posing harm to both aquatic ecosystems and drinking water quality. This issue could be potentially mitigated using nanoparticle (NP) treatment, simultaneously removing cyanobacteria and associated cyanotoxins in HABs. This research seeks to discern the effectiveness of using titanium dioxide and iron (III) oxide NP treatment at removing cyanobacteria via flocculation and sedimentation. Each NP at 25 mg/L and 50 mg/L were used to treat suspended culture of Microcystis aeruginosa, the representative cyanobacteria, up to 72 hours. Cell concentration and morphology in the supernatant were measured via a Coulter counter and …

Consumer Power To Change The Food System? A Critical Reading Of Food Labels As Governance Spaces: The Case Of Acai Berry Superfoods, Christine Parker, Hope Johnson, Janine Curll

Journal of Food Law & Policy

This article argues that the marketing claims on food labels are a governance space worthy of critical examination. We use a case study of superfood açaí berry products to illustrate how marketing claims on food labels encapsulate dominant neoliberal constructions of global food systems. These marketing claims implicitly promise that by making careful choices consumers can resist and redress the ravages of unbridled global capitalism. Food labels suggest that consumers can use market signals to simultaneously govern our own selves and the market to ensure sustainable, fair, and healthy consumption. In response, this article develops, justifies and applies a socio-legal …

The Clash Of Agricultural Exceptionalism And The First Amendment: A Discussion Of Kansas' Ag-Gag Law, Meredith Kaufman

Journal of Food Law & Policy

Since the Nation’s founding, agricultural production has been treated differently than other industries. This concept, known as “agricultural exceptionalism,” has manifested in many different ways throughout U.S. history. Since the 1990s, one manifestation of agricultural exceptionalism has been the enactment of “Ag-gag laws,” state laws that limit information gathering activities at animal production facilities. Ag-gag laws are frequently criticized by animal welfare advocates and legal scholars for seeking to shield animal production facilities from public scrutiny, a state-sanctioned protection not afforded to other industries.

Federal Regulation Of Pesticide Residues: A Brief History And Analysis, Kate Z. Graham

Journal of Food Law & Policy

In the United States today, there are over 900 pesticides in use1 and over 400 are approved for use in food production, whether used as part of the growing process or in post-harvest handling. Although the history of pesticide use in food crops goes back centuries, the post-war period has seen an enormous growth in the varieties and amounts of pesticides used in our food system. As our reliance on pesticides has grown, pesticides have become a divisive issue. Pesticide advocates view them as essential to a secure and reliable food supply needed to feed a growing world population. Detractors, …

Preparation And Evaluation Of Single-Stranded Dna Aptamer-Based Immunological Adjuvant In Broiler Chickens, Adil Sabr Al-Ogaili

Graduate Theses and Dissertations

Mineral oils and metal salts are commonly used as adjuvants to enhance acquired immunity. Recently, monoclonal antibodies (MAbs) and recombinant peptides agonist CD40 receptor have shown remarkable promise for induction of rapid and robust immune responses. Limitations of this approach MAb production costs and multiple administrations due to anti-MAb immune responses. Here we demonstrate the development of a unique and sophisticated DNA aptamer-based alternative for CD40-directed delivery of universal antigens as an alternative in chickens, and potentially other vertebrate species. This receptor, expressed by antigen-presenting cells, acts as a costimulatory molecule for activated T helper lymphocytes. After initially selecting for …

Evaluation Of Herd Size Management Strategies, Colson A. Tester

Graduate Theses and Dissertations

This thesis is comprised of two studies examining the effects of price signal based herd size management strategies on profitability of cow-calf operations. Herd size management strategies were evaluated across the previous two cattle cycles, 1990-2014, using a fixed land resource and included a variety of production scenarios. These scenarios varied in terms of stocking rates, fertilizer applications rates, and calving season. Each scenario was also analyzed both with and without weather effects on forage production. Weather effects were simulated using a production index derived from satellite imagery across the observed 25-year period. Three herd size management strategies: i) constant …

Comprehensive Poultry Supply Chain Model With Vertical And Horizontal Linkages: Implication Of Domestic And International Shocks, Hakan Unveren

Graduate Theses and Dissertations

According to USDA FAS, in 2017, the US was the largest broiler-producing country with 18.696 million metric tons and the second largest exporter of broiler products with 3.075 million metric tons (Brazil is the largest exporter with 3.847 million metric tons). Thus, around 83% of US production is consumed domestically. According to USITC, chickens are the most important protein source in the US, and Americans consume more chicken per capita than any other country. However, while the broiler industry is a key segment of US agriculture, it is underserved by large-scale supply-chain and trade models.

In this study, to fill …

Designing An In Vitro Mitral Valve Mounting And Testing System For Micro Ct Imaging, Marinna Tadros

Biomedical Engineering Undergraduate Honors Theses

Five million people in the US are diagnosed with valvular disease, of which mitral valve disease is one of the most common. Computational models are informed by high resolution images and have the potential to aid in diagnosing and establishing surgical plans to treat mitral valve diseases. Existing methods using 7T MRI imaging have limitations such as small bore diameter, long imaging times and difficulty in maintaining trans-mitral fluid pressure throughout the scan. Imaging with Micro CT allows for efficient scan times and eliminates bore size constraints which allows for imaging more sizes and types of MVs. There is a …

Concentration Of Hot Water Extracts Of Anthocyanins Obtained From Muscadine Grape Pomace Using Membrane-Osmotic Distillation, Chuqiao Mai

Food Science Undergraduate Honors Theses

Anthocyanins are well known for their health-promoting benefits. The goal of this study was to evaluate a distillation-based membrane technology to concentrate aqueous anthocyanins extracted from muscadine grape pomace using polypropylene (PP) or ethylene chlorotrifluoroethylene (ECTFE) membranes. A hot water extraction method was utilized to extract the anthocyanins from the pomace. A pre-experimental run using DI water as feed was conducted to optimize the NaCl brine concentration for osmotic distillation and it was determined that 4M was the optimal concentration. The aqueous anthocyanins extraction was filtrated through a series of filter of different pore sizes before the distillation process. Membrane …

Spatial Reorganization Of Histone-Like Nucleoid Structuring Proteins Caused By Silver Nanoparticles, Meaad Alqahtany

Graduate Theses and Dissertations

Silver nanoparticles (AgNPs) and ions (Ag+) can be the new generation of antibiotics due to their antimicrobial effects against bacteria and other microbes. Many studies have shown that AgNPs and suppress the growth of bacteria and damage the cell walls of the microbes; therefore, treating bacterial cells with AgNPs may be a promising method to terminate multi-resistant bacteria. In this work, the effect of AgNPs with two different surface coatings on the spatial reorganization of histone-like nucleoid structuring (H-NS) proteins in Escherichia coli bacteria was investigated using quantitative super-resolution fluorescence microscopy to understand the toxicity and antimicrobial mechanism of AgNPs. …

Removal And Reuse Of Phosphorus As A Fertilizer From Cafo Runoff, Hannah Young

Chemical Engineering Undergraduate Honors Theses

Eutrophication is the process in which nutrient saturated waters promote algal blooms on the surface of the water. This limits the amount of dissolved oxygen content in the water, effectively limiting the range of species that can survive in a body of water. Concentrated animal feeding operations (CAFO) can contribute to this issue. The animals in a CAFO produce large amounts of nutrient-rich waste streams that can enter natural waterways if not properly managed and increase the problem of eutrophication. The ability to treat these waste streams and recover the excess nutrients would allow for not only the reduction of …

Removal And Reuse Of Phosphorus As A Fertilizer From Cafo Runoff, Kristin Moore

Chemical Engineering Undergraduate Honors Theses

Eutrophication is the process in which nutrient saturated waters promote algal blooms on the surface of the water. This limits the amount of dissolved oxygen content in the water, effectively limiting the range of species that can survive in a body of water. Concentrated animal feeding operations (CAFO) can contribute to this issue. The animals in a CAFO produce large amounts of nutrient-rich waste streams that can enter natural waterways if not properly managed and increase the problem of eutrophication. The ability to treat these waste streams and recover the excess nutrients would allow for not only the reduction of …

Turbulent Effects On Building Pressure Using A Two-Dimensional Finite Element Program, Jonese Woods

Civil Engineering Undergraduate Honors Theses

Much of the knowledge about building aerodynamics today was obtained from physical testing like wind tunnel testing. Physical testing is time-consuming and very expensive. As a result, computational methods like the finite element method are being explored for use in building aerodynamics. Despite several years of research, there is still not a clear understanding of the peak pressure on buildings due to turbulence. Many of the research thus far has focused on comparing different computational methods. However, much work is needed in understanding the capability of the individual methods. In this work, a two-dimensional finite element program is used to …

Evaluating Rice Straw As A Substitute For Barley Straw In Inhibiting Algal Growth In Farm Ponds, Jacob Maris

Crop, Soil and Environmental Sciences Undergraduate Honors Theses

Algal blooms disrupt aquatic ecosystems and are more common in lakes, ponds, and rivers during the summer months due to nutrient pollution. Livestock production can contribute increased quantities of nutrients to water bodies from runoff of manure. Commonly used mechanical and chemical control methods may have limited success because algae are small and propagate quickly. Barley (Hordeum vulgare) straw has been shown to inhibit the growth of algae as the straw decomposes aerobically in ponds. Therefore, barley represents a natural option for algal biomass control. However, the small amount of barley production in Arkansas limits the availability of …

Determining The Relationship Among Cattle Genotype, Hair Coat Score, And Productivity Through The Investigation Of Single Nucleotide Polymorphisms Within Prolactin, Dopamine Receptor D2, And Melatonin Receptor 1a, Erin Davis

Animal Science Undergraduate Honors Theses

Prolactin (PRL), melatonin (MTN), and dopamine (DA) are all hormones that are believed to play a role in the regulation and growth of hair in beef cattle. There are also single nucleotide polymorphisms associated with each of these hormones or their receptors, indicating that the investigation of these polymorphisms could allow them to serve as genetic markers for the future productivity of an animal. The objective of this study was to determine the relationships among cattle genotype, hair coat score, and productivity through the investigation of single nucleotide polymorphisms within prolactin, dopamine receptor D2, and melatonin receptor 1A. Body weights, …

Evaluation Of Enzyme Effectiveness At Enhancing Fiber Digestion In Small Ruminants, Rachel Ranells

Animal Science Undergraduate Honors Theses

Feed costs account for up to 70% of total production costs making it vital that livestock producers maximize feed efficiency in a cost-effective manner (Bach, 2012). Producers often utilize feed additives to optimize nutrient absorption and increase productivity (McGrath et al., 2018). This study was conducted to determine the effects of an enzyme supplement containing Aspergillus niger and Aspergillus oryzae on dry matter (DM), organic matter (OM), neutral detergent fiber (NDF) and acid detergent fiber (ADF) intake and digestibility by lambs fed ad libitum diets of either alfalfa or bermudagrass hay. The study was set up in a 2 2 …

The Diversity Of Terrestrial Mammals Surrounding Waterfall At Billy Barquedier National Park, Kelsey Johnson

Animal Science Undergraduate Honors Theses

Billy Barquedier is a National Park located in the Stann Creek district of Belize that contains Neotropical vegetation and wildlife. This study was performed in order to provide a baseline inventory and appearance frequency patterns of the terrestrial mammals located within Zone 1 of the park near a waterfall. The goal of the data and information collected during this study is to gain a greater understanding of the biodiversity and activity patterns of terrestrial mammals within the park and across Belize as a whole. The use of camera traps, small Sherman live traps, large live traps, and tracking methods were …

Characterization Of Microtubule Organizing Centers In The Genus Protostelium, Including Evolutionary Implications, Ethan Taylor Ozment

Graduate Theses and Dissertations

Microtubule organizing centers (MTOCs) are cellular regions of microtubule nucleation. The best known MTOCs are those associated with the centrosome, but several non-centrosomal MTOCs are known in eukaryotes, especially in land plants. MTOCs are poorly characterized across the breadth of amoebozoan diversity, but are well-known in certain amoebozoan lineages, including the genus of protosteloid slime molds Protostelium. The structure of the MTOC is known for two non-ciliated species, P. nocturnum and P. mycophaga, as well as P. aurantium, which can reversibly become ciliated under appropriate conditions. P. nocturnum and P. mycophaga have acentriolar centrosomal MTOCs while P. aurantium has a …

Painting The Leaky Pipeline Pink: Girl Branded Media And The Promotion Of Stem, Juniper Patel

Graduate Theses and Dissertations

This thesis provides a critical feminist analysis of girl branded media depictions of girls in STEM. Through close textual analysis of three case studies—Disney Fairies films, Barbie: Dreamhouse Adventures, and My Little Pony: Equestria Girls media—I found that such STEM promotion tends to emphasize traditional gender roles and neoliberal market values. Disney Fairies films promote traditional gender roles via portrayals of play STEM, white hegemony, and western beauty standards. Additionally, these films promote the neoliberal ideal of industrialization as consequence free. Dreamhouse Adventures depicts STEM in relation to traditional gender norms such as caretaking, heteronormativity, and girl culture. Furthermore, this …

Simulating Alternative Tuberculosis Diagnosis Methods In Underdeveloped Countries, Luke Turner

Industrial Engineering Undergraduate Honors Theses

Tuberculosis is the deadliest infectious disease in the world; it is especially rampant in underdeveloped countries because they do not have the infrastructure, technology, or funding to properly combat the infection. However, the development of portable point-of-care diagnosis machines can reverse this epidemic as they far surpass conventional laboratory identification. The question now is where to place these machines, which is a difficult decision with a lack of data. Therefore, a flexible simulation model is created to test the implementation of these machines with different countries and configurations. The simulation tests the baseline model and three proposed implementations of the …

Teaching Introductory Programming Concepts Through A Gesture-Based Interface, Lora Streeter

Graduate Theses and Dissertations

Computer programming is an integral part of a technology driven society, so there is a tremendous need to teach programming to a wider audience. One of the challenges in meeting this demand for programmers is that most traditional computer programming classes are targeted to university/college students with strong math backgrounds. To expand the computer programming workforce, we need to encourage a wider range of students to learn about programming.

The goal of this research is to design and implement a gesture-driven interface to teach computer programming to young and non-traditional students. We designed our user interface based on the feedback …

Biogeography Of Endemic Dragonflies Of The Ozark-Ouachita Interior Highlands, Wade Alexander Boys

Graduate Theses and Dissertations

A common pattern across many taxonomic groups is that relatively few species are widespread while the majority are restricted in their geographic ranges. Such species distributions are used to inform conservation status, which poses unique challenges for rare or cryptic species. Further, priority status is often designated within geopolitical boundaries, which may include only a portion of a species range. This, coupled with lack of distributional data, has resulted in species being designated as apparently rare throughout some portions of their range, which may not accurately reflect their overall conservation need. The Interior Highlands region of the central United States …

Black Female Graduate Students' Experiences Of Racial Microaggressions At A Southern University, Kendra Elizabeth Shoge

Graduate Theses and Dissertations

Researchers have found that microaggressions can cause psychological distress, frustration, avoidance, confusion, resentment, hopelessness, and fear. Previous studies from Southern universities have addressed the adjustment experiences of Black women in graduate programs, obstacles faced by Black women in higher education and strategies to overcome those obstacles, and factors associated with Black student motivation and achievement. Discrimination and racism are factors identified in those studies, however, there is little research on the experiences of Black women in graduate programs and the impact of racial microaggressions on them.

The purpose of this study was to examine Black female graduate students’ experiences of …