Digital Commons Network^™

Algal Wastewater Treatment And Biofuel Production: An Assessment Of Measurement Methods, And Impact Of Nutrient Availability And Species Composition, John F. Chamberlin

Graduate Theses and Dissertations

In order to move towards a more sustainable future, human civilization will need to decrease its impacts on air and water quality and minimize consumption of fossil fuels. Using algae for wastewater treatment and biofuel production offers one approach to progress towards these goals simultaneously. Algae are capable of removing nutrients from wastewater and carbon dioxide from the air, and the biomass formed in that process can be used to generate a wide-range of products including fertilizer or fuels that could power combustion engines, power plants, or zero-emission fuel cell vehicles. Using wastewater for biofuel production has the potential to …

Place(Ment), Ashley Lynn Byers

Graduate Theses and Dissertations

Throughout her time at the University of Arkansas Master of Fine Arts program, Ashley Byers has been creating work about the folklore, landscape, and people of the Ozarks. Though she continues to create work with the Ozarks in mind, it became a motif used for a broader conversation about the ad hoc, holiness, painting, landscape, the figure, and intimacy.

In many ways, the concepts within her work are born out of the Ozarks.

When can remnants come together to become more than the sum of their parts? Derelict, easily dismissed objects, when set in the right context or viewed through …

Nanofiltration Rejection Of Contaminants Of Emerging Concern From Municipal Water Resource Recovery Facility Secondary Effluents For Potable Reuse Applications, Steven Michael Jones

Graduate Theses and Dissertations

As reuse of municipal water resource recovery facility (WRRF) effluent becomes vital to augment diminishing fresh drinking water resources, concern exists that conventional barriers may prove deficient and the upcycling of contaminants of emerging concern (CECs) could prove harmful to human health and aquatic species if more effective and robust treatment barriers are not in place.

There are no federal Safe Drinking Water Act (SDWA) regulations in place specifically for direct potable reuse (DPR) of WRRF effluent. Out of necessity, some states are developing their own DPR reuse regulations. Currently, reverse osmosis (RO) is the default full advanced treatment (FAT) …

Portrayal, Kathryn A. Wilson

Graduate Theses and Dissertations

This thesis is in addition to my thesis series, Portrayal, a group of selected photographs. In this essay I outline the contents and developments of the series of photographs by the same name. It includes information on the artistic techniques employed, concepts and considerations taken into account when making the photographs including the relationship with and presentation of the subject, the exhibition of the photographs, and influences on the specific composition and tone of the photographs.

The images in Portrayal are not candid or objective views. Each is constructed based upon the negotiations with the subject and represent an edited …

Chitosan As An Antiviral, Tayler Pauls

Biomedical Engineering Undergraduate Honors Theses

There is no broad-based antiviral medication available today; there are specific antivirals, for example, the antiretroviral for HIV. However, these specific antivirals are not available in each country and can be problematic for specific patients. Chitosan is proposed as a possible broad-based antiviral, which has already demonstrated antibacterial properties, antiviral properties in plants, is used for wound healing and as a hydrogel among other medical applications. The methods used are transfection of NIH-3T3 cells with GFP-adenovirus with 0.1%, 0.5%, and 1% chitosan added to virus prior to transfection. Fluorescence microscopy and flow cytometry data has validated that the use of …

Animal Legal Defense Fund V. Otter: Industrial Food Production Simply Is Not A Private Matter, Lucy L. Holifield

Journal of Food Law & Policy

About half of the states have either passed or attempted to pass laws aimed at stifling criticism and exposure of factory farms throughout the country. This unwanted exposure is often the result of undercover reporters gaining access to the interior of meat-producing entities by seeking and obtaining employment. Their reports often expose filthy and dangerous conditions, substantial animal abuse, and the incorporation of unfit animal products into the public's food supply.

Studies On The Prevalence And Control Of Parasitic Helminths In "Natural" Laying Hens, Brittany R. Weir

Animal Science Undergraduate Honors Theses

One societal trend that has been gaining much traction and popularity since the 21^st century began is “organic” and/or “natural” food products. In 1999, the global market accounted for $15.2 billion dollars worth of organic food and drink, compared to the market in 2014 where we consumed $80 billion dollars worth (Willer et. al, 2016). With “natural” production of food animals however, “natural” parasite transmission may be a consequence. To that end, this experiment examines the prevalence of helminths in 110 “natural” laying hens from three regional farms and the efficacies of fenbendazole, piperazine, and levamisole on what should …

A Narrative Inquiry Of Protest Songs: Comparing The Anti-War Music Of Vietnam And Iraq, Sophia K. Yanik

Sociology and Criminology Undergraduate Honors Theses

This research examines the social role of protest music in wartime eras through lyrical content analysis. By analyzing songs across the Vietnam War era and the Iraq War era, the shifting role of protest music across generations reveals not only how this music influences and encourages different social aggregates, but also how it adapts to remain relevant in a continuously modernizing American society. This research thus serves to demonstrate the impact of narratives in social movements and the sway narratives have in shaping public perspectives through their encouragement of solidarity between diverse social groups. Methodology includes narrative analysis of two …

The Financial Stability Of Nonprofit Organizations, Heather M. Blalack

Finance Undergraduate Honors Theses

Abstract

This thesis evaluates the financial stability of nonprofit organizations and their ability to effectively facilitate the accounting functions of a business. Specifically, it focuses on the companies’ ability to maintain steady cash flow and fulfill all financial obligations while also achieving commitments stated in the company’s mission statement and core values. In addition, this analysis concentrates on the immense lack of knowledge and experience pertaining to financial management within many nonprofits as well as the scarcity of related trainings. As most administrators of nonprofits lack the proper training or background pertaining to financial oversight, there is often an imbalance …

Use Of Anti-Mullerian Hormone To Select For Fertility In Beef Heifers, Hannah Newberry

Animal Science Undergraduate Honors Theses

ABSTRACT

A study was conducted to determine whether concentration of serum Anti-Mullerian Hormone (AMH) at weaning and/or breeding could predict subsequent fertility in beef heifers. Frequency distribution was used to assign serum AMH concentration measured at weaning, breeding, and the change from weaning to breeding, into quartiles. Comparison of heifers based on serum AMH quartiles at weaning failed (P ³ 0.35) to detect any effect of AMH on subsequent heifer cyclicity at breeding, estrous response after synchronization, artificial insemination (AI) pregnancy rate, overall breeding season pregnancy rate, or estimated estrous cycle of the breeding season when conception occurred. Based on …

Removal Of Endocrine Disrupting Compounds From Secondary Municipal Wastewater, Dustin R. Resz

Chemical Engineering Undergraduate Honors Theses

Approximately 1.2 billion people around the world live in areas of physical water scarcity. This could increase to half of the world’s population by 2030 and could displace 24 to 700 million people unless steps are taken to ensure adequate water supply.1 Water scarcity is an escalating issue within the United States, specifically in Western inland states with arid climates. This scarcity is encouraging communities to investigate tertiary level municipal wastewater treatment, allowing for reuse of wastewater. Unfortunately, wastewater contains numerous contaminants that are not regulated by the Environmental Protection Agency (EPA) under the Safe Drinking Water Act (SDWA). Many …

Dissemination And Persistence Of Plasmid Located, Integron Associated Antibiotic Resistant Genes In Wastewater Treatment Plant Effluent And Stream Water Bacteria, _ Suhartono

Graduate Theses and Dissertations

Transmissible plasmid-mediated integrons play important role in the persistence and dissemination of antibiotic resistance throughout the environment. Plasmids from 139 multi-antibiotic resistant Escherichia coli recovered from wastewater treatment plant effluent and upstream and downstream receiving stream water in Northwest Arkansas were extracted and profiled. Genes of class 1 and class 2 integrase (intI), mobilization (mob), sulfamethoxazole resistance (sul), and trimethoprim resistance (dfr) were detected using PCR and confirmed through DNA sequencing. Plasmids from almost half of the isolates (47%) were transmissible with mobF12 gene as the most frequently detected mobilization gene. Plasmid-borne class 1 with and without class 2 integrons …

Entertainment In The 21st Century: Is An Independent Networked Multimedia Production And Promotion Firm A Viable Business Option In The Modern Entertainment Industry?, Alex Mcgowen

Marketing Undergraduate Honors Theses

“Artists are being stifled by the ‘major label’ stance that exclusively demands what’s ours is ours and can only be handled by us. It should be more about creative freedom” (Monstercat Manifesto). Over the past fifteen years, we have witnessed how the internet has changed how entertainment is distributed and consumed. This has led to a change in behavior from major entertainment production firms, and has given way to the surge of independent labels and production houses. Now, entertainers can lead successful careers by reaching their audience through digital platforms, successfully decreasing production and distribution costs. Consumers can find an …

Walking In American History: How Long Distance Foot Travel Shaped Views Of Nature And Society In Early Modern America, Brian Christopher Hurley

Graduate Theses and Dissertations

The industrialization of transportation, first with railroads, and then with automobiles, took Americans away from foot transport, changing how Americans interacted with one another and viewed their surroundings. The dissertation traces the walking trips of five central figures in this era of mechanized transport, the personal impact of their experiences while walking through a land they were accustomed to skimming across, and the ways in which these personal revelations led to changes in the national consciousness. Walking upright was central to the development of homo sapiens as a species, and shaped the way they interacted with their environment. Certain aspects …

A Method Comparison And Stressor-Response Experimental Study Of Nitrogen And Phosphorus Impacts To Periphyton In Ozark Streams, Ashley Renee Rodman

Graduate Theses and Dissertations

Stream bioassessment is important for understanding algal-nutrient relationships and the development of scientifically defensible numeric nutrient criteria. However, multiple methods of periphyton data collection are currently used, and little is known about the comparability of resulting datasets. Literature also suggests other factors besides nutrients (i.e. variable grazing, light, and flow) can confound algal-nutrient relationships. A one-year method comparison study and 31-day algal biomass-nutrient manipulative experiment were conducted in the southern Ozarks of Arkansas. The method comparison study was implemented using two common bioassessment procedures (whole-surface and delimiter-reduced periphyton removal) to assess the potential for combining datasets. During the manipulative experiment, …

Evaluation And Selection Of A Bacillus Based Direct-Fed Microbial Candidate For In Situ Enzyme Production To Improve Gut Health Integrity, Bone Quality And Growth Performance In Poultry, Juan David Latorre Cardenas

Graduate Theses and Dissertations

During the last decade, the increasing interest in renewable energy sources has been changing the distribution of corn utilization from human and animal consumption to biofuel production, leading to a continuous rise in feed costs of livestock diets. Therefore, alternative feed ingredients such as distillers dried grains with solubles (DDGS), as well as cereals like wheat, barley, and sorghum have become part of the feed matrix to maintain or reduce production costs. However, these raw materials often contain a higher concentration of antinutritional factors in comparison to corn, including non-starch polysaccharides (NSP) which increase digesta viscosity and reduce nutrient absorption …

Development Of A Biofilm Model For Evaluating Poultry Drinking Water Sanitation Procedures, Pramir Maharjan

Graduate Theses and Dissertations

Enclosed water system has created a minimal sanitation focus leading to biofilm issues which are a source of flock health challenges. A series of in vitro tests were conducted to evaluate biofilm growth on polyvinylchloride (PVC) surfaces when exposed to treated/untreated water sources (test water) that are typically supplied in commercial barns. PVC test coupons (15.16 cm2) were immersed in test water in beakers to grow biofilm. Test water supplies were characterized for microbial, mineral and pH content. Temperature of test water was set at 90 °F (32.2 ᵒC) on d1 and then dropping 1°F each day over 7-day period …

Dietary Effects On The Stoichiometry Of Growth, Regulation, And Wastes Of Ozark Stream Insect Detritivores, Halvor Matthew Halvorson

Graduate Theses and Dissertations

A widespread stressor, anthropogenic nitrogen (N) and phosphorus (P) pollution can increase resource nutrient content and alter animal community composition in freshwater ecosystems. In this dissertation, I used ecological stoichiometry theory to examine effects of diet nutrient content and leaf litter type on growth, regulation, and wastes of aquatic invertebrate detritivores. I tested effects of leaf litter diet carbon:phosphorus (C:P) on growth and stoichiometric regulation of the detritivorous caddisfly Pycnopsyche lepida and used results to determine a threshold elemental ratio of oak litter C:P=1620 that confers peak growth of this species. This empirical, growth-based approach provided a more accurate estimate …

Divining The Southwest: Liminality, Pragmatism, And Regionalism In "Death Comes For The Archbishop", Alex C. Blomstedt

Graduate Theses and Dissertations

This work aims to explore the themes of pragmatism and liminality, particularly as they pertain to spirituality, in Willa Cather’s Death Comes for the Archbishop. By taking an interdisciplinary critical approach to the novel, I will synthesize its spiritual affect into a sensibility called “pragmatic liminality.” Finally, I will connect this sensibility to other works in the Southwestern literary canon and elucidate the foundational importance that pragmatic liminality has to the Southwestern “sense of place” and its role in the larger narratives of regionalism in American literature.

[Re]Visiting The Rime: A Case Study Of Adaptation As Process And Product With The Rime Of The Ancient Mariner, Sally Ferguson

Graduate Theses and Dissertations

This thesis combines adaptation theory with ecology to examine Samuel Taylor Coleridge's Rime of the Ancient Mariner (1798) and its adaptations; it argues further combinations of adaptation with evolutionary theory and ecological ideas could allow for a better interpretation of many texts. The adaptation Rime of the Modern Mariner (2011) by Nick Hayes and the appropriation Perelandra (1943) by C.S. Lewis will also be present in individual chapters to examine the texts' interactions with each other as they evolve and how each work represents the combined theory.

Use Of A Blunt Version Of Meullenet-Owens Razor Shear To Analyze Meat Qualities Of Broilers With Woody Breast Myopathy And Reared To Various Ages, Famous Lue Yang

Graduate Theses and Dissertations

Broiler breast meat tenderness is an important meat quality attribute. There has been an increase in incidences of woody breast along with white striping as meat quality defects. These defects have been found to negatively impact meat qualities of broiler breast fillets. Woody breast can be classified by the degree of hardness into normal (NORM) and severe (SEV). The Meullenet-Owens Razor Shear (MORS) method was developed to assess broiler meat tenderness and a blunt version (BMORS) has been reported to be more sensitive at higher degrees of toughness. The present study was intended to determine the effect of age, debone …

Evaluation Of Rusle 2 To Estimate Soil Loss From Pastures, Stasha Katrina Balkissoon

Graduate Theses and Dissertations

The accurate estimation of soil erosion by the Revised Universal Soil Loss Equation version 2 (RUSLE2) is critical for several conservation assessments, least of which is its use in the Phosphorus Index (PI) to identify and rank the vulnerability of agricultural fields to phosphorus (P) runoff. Earlier versions of RUSLE reported a soil loss overestimation, which were revised to give RUSLE2, where biomass production in different climatic regions was more accurately represented. RUSLE version 2.0, which contains the new vegetative biomass production routine, was evaluated using two performance indices, the Nash Sutcliffe Efficiency Index (NSE) and Index of Agreement (D) …

Meat Quality And Sensory Analysis Of Broiler Breast Fillets With Woody Breast Muscle Myopathy, Jessica Solo

Graduate Theses and Dissertations

Recently, the poultry industry has encountered an emerging muscle myopathy known as woody breast (WB), which is characterized by hardness throughout the Pectoralis major muscle. Two experiments were performed to assess sensory characteristics and acceptability of WB meat and to determine the effect of broiler age on meat quality factors in varying severities of WB. Fillets were categorized as normal (NORM), moderate (MOD), or severe (SEV) WB. In Experiment 1 (Exp. 1), descriptive (n=9 trained panelists) and consumer (n=74 panelists) sensory analysis was conducted with NORM and SEV fillets at hot and cold serving temperatures (HOTNORM, COLDNORM, HOTSEV, COLDSEV). In …

Why Everything Is A Whole Lot Of Nothing Worth Losing Or Getting Back, David Kinzer

Graduate Theses and Dissertations

In these three stories, David Kinzer answers the collection’s title with the precision of the hard sciences. In “The Humanist,” the strained relationship between a father and son becomes even more complicated when the son marries. In “Château Royale,” a young woman moves into a new home with a dark history. The final piece, “Starting After Midnight,” follows two young people in the aftermath of a one-night stand. All of everything is inside: Gatling guns and The Birth of Tragedy, Anne Rice and Taco Bell, kit foxes and sex tips. The answer is waiting. All you need to do is …

Influence Of Fatty Acids And Their Derivatives On Aphid Resistance In Arabidopsis And Tomato, Jiamei Li

Graduate Theses and Dissertations

Fatty acid desaturases (FADs) are enzymes that act in the chloroplast or the endoplasmic reticulum (ER) to incorporate double bonds into the acyl chains of fatty acids, and recent evidence indicates that at least one of these enzymes, FAD7, also influences plant resistance to aphids. FAD7 is an enzyme in the chloroplast that is found throughout the plant kingdom and that desaturates 16- and 18-carbon fatty acids (FAs) with two double bonds (dienoic acids) to generate FAs with three double bonds (trienoic acids). In tomato (Solanum lycopersicum) and the model plant Arabidopsis thaliana, mutants with impaired FAD7 function are more …

"All I Do Is Win": The No-Lose Strategy Of Cafo Regulation Under The Caa, Karl J. Worsham

Journal of Food Law & Policy

Corporate farms, often known as concentrated animal feeding operations ("CAFO'), provide inexpensive animal products but do so by externalizing the cost of their operation in the form of environmental harms and risks to human health. This article explores one possible approach to mitigating CAFO-caused harms. It argues that CAFO regulation under any one of three Clean Air Act ("CAA ") programs will result in net benefits, not just for air quality, but also for other CAFO-caused harms and thus, that CAA regulation of CAFOs is a no-lose strategy. The article then goes further to conclude that, while regulation under any …

Determining The Appropriate Timing Of Administration For Baseline Computerized Neurocognitive Testing (Cnt) Following Maximal Exertion, Samantha Mohler

Health, Human Performance and Recreation Undergraduate Honors Theses

Background: Computerized neurocognitive testing is part of the recommended multi-faceted approach to SRC assessment. Prior research has suggested that maximal exertion negatively effects CNT test scores. Purpose: To identify the appropriate timing of the administration of CNT following maximal exertion in healthy college-aged student athletes. Study Design: Prospective, random cross-over, repeated measures design. Methods: Week one participants fill out intake forms and then complete a baseline ImPACT test. The following three weeks, individuals were administered a VO2 max cycle ergometer test. Following the test participants will rest for <5 (immediate), 15, or 30 minutes before re-taking ImPACT. Results: Immediately following maximal exertion, negative composite scores, relative to baseline, were …

Cfd Model For Ventilation In Broiler Holding Sheds, Christian Heymsfield

Biological and Agricultural Engineering Undergraduate Honors Theses

Broiler production in Arkansas was valued at over $3.6 billion in 2013 (University of Arkansas Extension of Agriculture). Consequently, improvement in any phase of the production process can have significant economic impact and animal welfare implications. From the time poultry leave the farm and until they are slaughtered, they can be exposed to harsh environmental conditions, both in winter and in summer. After road transportation, birds are left to wait in holding sheds once they arrive at the processing plant, for periods of approximately 30 minutes to two hours. This project was interested in this holding shed waiting time during …

Crizotinib And Ceritinib Induce Apoptosis And Necrosis In Primary Rat Hepatocytes With Distinct Capacity, Alec T. Salminen

Biomedical Engineering Undergraduate Honors Theses

Drug development makes up a major portion of biomedical engineering research interests. The FDA oversees the introduction, experimentation, and implementation of all drugs before market approval is granted. Even after market approval is granted, the FDA continues to monitor the safety of all drugs. Crizotinib and ceritinib are two anaplastic lymphoma kinase (ALK) inhibitors recently approved by the FDA. Both drugs are indicated for treatment of non-small cell lung cancers (NSCLC) with abnormal ALK gene, and they are approved with a companion diagnostic test that determines ALK abnormality. Clinical trial data suggest that crizotinib and ceritinib can cause liver injury, …

Transitional Urban Voids In Austin, Texas, Courtney A. Tarver

Landscape Architecture Undergraduate Honors Theses

A city’s urban fabric is constantly evolving through development and decay under the fluctuating rates of habitation. Cities are growing rapidly as populations climb higher, with new demands for the incoming waves of people seeking employment and a place to call home. Austin, Texas is the fastest growing American city today, with a population growth rate of three percent per year. With this growth and its demands for open space, open spaces in the form of urban voids and temporary use spaces become an interest to designers as spaces with flexibility. The approach of this thesis is to understand these …