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Fret Study Of Ligand Binding And Exchange Kinetics On The Surface Of Cdse/Zns Quantum Dots, Randee Jean Mcbride

Graduate Theses and Dissertations

Quantum dots are a valuable tool in many research applications and commercial development. Their applications are far reaching and as such have become a topic of great interest. One of their greatest assets is the ability to utilize them as water soluble fluorescent labels. Rendering the nanocrystals water soluble can be accomplished in several ways, but one very popular method is by capping them with water-soluble multi-functional organic ligands. However, these ligands, when attached to the quantum dot surface, are labile and can be exchanged which can be problematic when using the quantum dots in research applications. This projects investigates …

Spatiotemporal Fluctuations Of Olfactory Stimuli And Its Detection By An Optical Method, Mitu Chandra Acharjee

Graduate Theses and Dissertations

Olfactory processing in the mammalian brain is a highly dynamic process, yet most of the olfaction experiments have been studied primarily with static stimuli. Odors in the natural environment are transported by turbulent flow of air or water. Natural odorants have fluctuations in concentration and it changes rapidly with time. These rapid fluctuations may pose some challenges to identifying an odor; on the other hand, the variation itself may provide important clues about the odor source. The goal of this thesis project was to create a similar odorant environment like the rapid odor fluctuations encountered in nature – to meet …

Fundamental Studies Of Magnetoconvective Forces And Density Gradients In A Microfluidic Environment, Adam James Kreidermacher

Graduate Theses and Dissertations

Magnetoconvection is a promising phenomenon for developing new electrochemical-based microfluidic flow devices with unique capabilities, such as easily switching flow direction and adjusting flow speeds and flow patterns as well as avoiding bubble formation. In order to develop these devices it is necessary to study the underlying forces. Four contributions toward fluid flow were considered. The first and foremost is the magnetohydrodynamic force, which is the magnetic component of the Lorentz force and governed by the right hand rule. It generates the majority of the convention, and is the most well-known. The second is the gravitational force, which causes convection …

Novel Biomarkers For Calcium And Phosphorus Metabolism In Breeder Hens And Broilers, Andrew Dick Magnuson

Graduate Theses and Dissertations

Broiler breeder hens are subject to the dual expectation to not only maintain a high production of eggs for an extended time period, but to produce eggs which can support the life of chicks which will be used for either meat production or as parent stock. Egg fertility and hatchability are heavily influenced by the thickness of the egg shell, the mineral calcium carbonate shell of the egg necessary for protecting the embryo growing inside. Many factors affect egg shell quality including age of the hen, diet, environmental conditions, genetic strain, stress, disease, and nutrition. Laying hens will mobilize calcium …

Monochamus Titillator Oviposition And Intraspecific Competition In Shortleaf Pine Bolts, Ryan Patrick Rastok

Graduate Theses and Dissertations

Monochamus titillator (Coleoptera: Cerambycidae) feed on trees in the family Pinaceae as adults and larvae. Adults feed on healthy twigs and branches and oviposit on stressed, dead, or dying trees. Prior to oviposition, females construct pits on the bark surface using their mandibles. The number of eggs laid beneath bark, where oviposition pits have been constructed, varies greatly. Developmental time and adult body size also vary greatly. I investigated oviposition and intraspecific competition with the goal of determining the degree to which various insect densities and oviposition times impact the following: 1) oviposition pit construction; 2) egg deposition; 3) emergence, …

Redefining Access To Public Space: Community Relations In A New Immigrant Setting, Aaron Isaac Arredondo

Graduate Theses and Dissertations

This article examines how and to what extent charging an entrance fee at a public recreational space in a new immigrant setting affects the participation of Latino and migrant population groups at The Jones Center for Families (JCF) in Springdale, Arkansas. This study also documents how participants respond to the entrance fee system by looking at their available options to spend leisure time when living in an area with limited financial resources and recreational facilities. Using qualitative data collected in Northwest Arkansas (NWA), this study looks at how the transformation of JCF from a public to quasi-public space redefines relations …

The Comparative Effects Of Hot Yoga And Thermoneutral Yoga On Flexibility, Heart Rate, Sweat Rate, And Mood, Hannah Kirkland Campbell

Graduate Theses and Dissertations

Yoga is an ancient Indian philosophy, described as a therapeutic intervention and health maintenance practice that unites the mind and body to aid healing through the combination of physical postures, breathing techniques, and meditation. There is ample research regarding yoga practiced in an environment that is thermoneutral, or in an environment that does not alter the metabolic heat production or evaporative heat loss of people. However, minimal research exists on the increasingly popular form of yoga known as hot yoga, or yoga practiced in an environment that is often humidified and 95° F or warmer. This exploratory study compared the …

Differentiation Revealed: A Multiple-Methods Qualitative Study On The Implementation Of Differentiated Instruction In A Mixed-Ability Elementary Classroom, Curtis James Cunningham

Graduate Theses and Dissertations

Differentiated instruction as a philosophical approach to teaching has been around for decades. In recent weeks differentiation has come under fire as being an approach to teaching that is simply too difficult for teachers to implement. While teachers may attend a workshop or take a graduate class on the topic of differentiation and choose not to embrace the philosophy, there are also teachers who have successfully implemented differentiation. The argument against differentiation is based on the amount of effort required to simultaneously implement all components of differentiation.

To address these concerns the following question provided guidance for the present multi-method …

An Empirical Water Quality And Best Management Practice Prioritization Model For Select Arkansas Watersheds, James Mccarty

Graduate Theses and Dissertations

The purpose of this study was to prioritize subwatersheds using water quality data and watershed characteristics. Water quality data was provided through studies by the Arkansas Natural Resources Commission, Beaver Water District, Arkansas Water Resources Center, and publicly available USGS gage data. A total of 114 sites across five HUC-8 watersheds were analyzed, including 12 USGS gages. Watershed characteristic data was retrieved from USGS and Arkansas GeoStore geodatabase repositories. A significant linear relationship between baseflow and stormflow nutrient concentrations was established allowing for the use of baseflow concentrations in the prioritization methodology. Pearson correlation, linear regression, classification and regression tree, …

Water Consumption Behavior In Broilers, David Harold Mccreery

Graduate Theses and Dissertations

A series of trials were conducted to analyze broiler water consumption behaviors under commercial conditions. The first trial was to quantify the number of broilers drinking at times of peak water demand. Birds were evaluated at time intervals of 5, 10, 15, 30, 45, and 60 minutes from the start of the light period to establish the percentage birds having consumed water by that point in time. Significant differences were found by bird age in the 5, 10, and 15 minute intervals, however there were no significant differences in the percentage of birds having consumed water in the 30, 45, …

A Cradle To Farm Gate Life Cycle Analysis Of Land Use In U.S. Pork Production, William Benjamin Putman

Graduate Theses and Dissertations

The goal of this study was to conduct a detailed Life Cycle Assessment (LCA) of the U.S. live swine production supply chain to quantify land use requirements and to assess the impact associated with various ration compositions. The functional unit was defined as one kilogram (2.2 pounds) of live swine at the farm gate, ready for transport to the abattoir. This assessment focused on the three highest producing USDA regions, which encompassed the Midwest (Regions 5 and 7) and the Southeast (Region 4), representing 86% of U.S. market hog production.

First, a literature review was conducted to summarize the most …

The Impact Of Herbicide-Resistant Rice And Hybrid Rice Technology On Weedy Rice Evolution, Vijay Singh

Graduate Theses and Dissertations

Weedy rice (Oryza sativa L.) competes aggressively with rice, reducing yields and grain quality. ClearfieldTM rice, is nontransgenic herbicide-resistant (HR) rice introduced in 2002 to control weedy rice, has resulted in ALS-resistant weedy rice due to gene flow. Volunteers of ClearfieldTM rice (F2) accelerate the HR weedy rice evolution by acting as agents of gene flow. Weedy rice (89) collected from 11 counties in Arkansas were screened for resistance in a field experiment in Stuttgart (2011). Seventy-nine percent of accessions were resistant to imazethapyr and harbored S653N mutation. These HR weedy accessions were outcrosses of ClearfieldTM rice and weedy rice. …

Meat Quality Of Broiler Breast Fillets With White Striping And Woody Breast Muscle Myopathies, Vishwesh Vijay Tijare

Graduate Theses and Dissertations

The global poultry industry has been faced with emerging broiler breast meat quality issues known as white striping and woody breast. Two experiments were conducted to evaluate effects of white striping and woody breast hardness on meat quality traits in broiler breast fillets. Birds were processed at 8 wk (Exp.1) and at 6 and 9 wk of age (Exp.2), whereas deboning was carried out at 4 and 2 h postmortem in Exp.1 and 2, respectively. Fillets were categorized as: normal for both white striping and woody breast (NORM); mild for white striping and woody breast (MILD); severe for white striping …

Life Cycle Assessment Of Alternative Swine Management Practices, Prathamesh Avadhut Bandekar

Graduate Theses and Dissertations

Life Cycle Assessments (LCAs) are quantitative analyses of complex systems for evaluation of impacts and risk associated with management decisions. LCAs can be effective tools for determining comparative advantages of management strategies across specific impact concern. In this study, life cycle assessments of pork production management alternatives was performed. The alternative management practices included in this study were production of entire males (boars), use of pens for gestation housing, immunocastration, production without growth promoting antimicrobials, production without growth promoting and preventive antimicrobials, and production without ractopamine. These LCAs evaluated the impact of each management strategy on greenhouse gas emission (GHG), …

Effects Of Soybean Pectin On Blood Glucose And Insulin Responses In Healthy Men, Melissa Ann Jones

Graduate Theses and Dissertations

The goal of this study was to examine the effects of soy pectin on postprandial plasma glucose and insulin responses in healthy adult males␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣␣ intestinal microbiota to determine if differences in weight or body mass index would be linked to differences in microbiota populations. Pectin is a soluble fiber with demonstrated health benefits such as the ability to lower blood glucose and cholesterol, increase satiety leading to lower caloric intake, improve insulin resistance and lower inflammation. These benefits suggest that pectin may help in prevention and treatment of type II diabetes. Soy pectin is extracted from hulls, a waste product …

Is Chir Pine Displacing Banj Oak In The Central Himalaya? Socioeconomic Implications For Local People And The Conservation Of Oak Forest Biodiversity, Ankush Nautiyal

Graduate Theses and Dissertations

Various studies have suggested that chir pine (Pinus roxburghii) is replacing banj oak (Quercus leucotrichophora) in the Central Himalaya. Five sites with three different types of forests (banj oak, chir pine and mixed oak-pine) were sampled to compare the diversity of their vegetation and to assess the impact of this ongoing conversion on biodiversity. Soil samples collected from oak and pine forests were analyzed and compared. In addition, dendrochronology was used to obtain age estimates of chir pine and to understand the growth response of this species to precipitation. Also, samples of ectomycorrhizal fungi were collected in the form of …

Effects Of Motivational Prompts On Motivation, Effort, And Performance On A Low-Stakes Standardized Test, Katrice A. Hawthorne, Linda Bol, Shana Pribesh, Yonghee Suh

Educational Leadership & Workforce Development Faculty Publications

Increased demands for accountability have placed an emphasis on assessment of student learning outcomes. At the post-secondary level, many of the assessments are considered low-stakes, as student performance is linked to few, if any, individual consequences. Given the prevalence of low-stakes assessment of student learning, research that investigates the relationship between student motivation, effort, and performance on low-stakes tests is warranted as these tests are increasingly being used to make judgments about the quality of student learning. This quasi-experimental study was conducted at a public mid-sized university with 87 undergraduate students enrolled in four 100-level general education courses. The researchers …

Effect Of In Ovo Feeding Of Dextrin-Iodinated Casein On Hatch, Growth And Gene Expression In Broilers., Shaymaa Mostafa Ibrahim Abousaad

Graduate Theses and Dissertations

Six experiments were conducted to determine effects of in ovo feeding of dextrin (Dext, 18% maltodextrin, 10% potato starch dextrin) and iodinated casein (IC) on hatch and growth performance in broilers. In each experiment, approximately 15,000 eggs (2500 eggs per group) were treated at 18.5 to 19 d of embryonic development. Three studies indicated that hatch weights were higher in chicks receiving Dext or Dext containing IC at 240 or 480 µg/mL and only one study indicated negative effects of Dext or 240 µg IC/mL saline on hatch weight. In one growth study, broilers provided Dext or Dext with IC …

Novel Azole-Based Rearrangements, Kolawole Folayele Ayinuola

Graduate Theses and Dissertations

This work describes efforts targeted at the development of novel reactivity modes for the Breslow intermediate, which was proposed by Breslow to explain the mechanism of action of thiamine-dependent enzymes. By employing this intermediate as a hydroxy-substituted N,S-ketene acetal, we successfully captured it via Claisen rearrangement towards the preparation of diaryl tertiary alcohol products that are isomers of the hitherto elusive intermediate. This strategy also constitutes an unusual disconnection for a Claisen rearrangement precursor.

We have also uncovered an unprecedented radical C-N bond scission of a Breslow intermediate when a fluorenyl group is installed on the azolium nitrogen atom. This …

Understanding The Experiences Of African-American Relatives Who Serve As Care Providers To Custodial Children In Arkansas: An Intersectional Case Study, Carmen Johnson-Hardin

Graduate Theses and Dissertations

An increase in the provision of long-term care by relative caregivers to custodial children has brought attention to the physical, emotional, and Social challenges of this complex caregiving experience. Prior studies have examined separate structural identities that focus on comparing the quality of life, educational status, Social status, and income of grandparent custodial caregivers. To extend this research, it is important to explore the gaps in service provisions to relative caregivers; comparative viewpoints of relative caregivers and service providers regarding policies and practices; and heterogeneity among Black relative caregivers utilizing an intersectional framework. Face-to-face or telephone interviews were conducted with …

Hematoma Enlargement Among Patients With Traumatic Brain Injury: Analysis Of A Prospective Multicenter Clinical Trial, M Fareed K. Suri, Adnan I. Qureshi, Ahmed A. Malik, Malik M. Adil, Archie Defillo, Gregory T. Sherr

Articles

Observational studies suggest that hematomas continue to enlarge during hospitalization in patients with traumatic brain injury (TBI). There is limited data regarding factors associated with hematoma enlargement and on whether hematoma enlargement contributes directly to death and disability in patients with TBI.

We analyzed data collected as part of the Resuscitation Outcomes Consortium Hypertonic Saline and TBI Study. Hematoma enlargement was ascertained and collected as a predefined safety endpoint. We evaluated the effect of hematoma enlargement on the risk of death and disability at 6 months based on the Extended Glasgow Outcome Scale (GOSE) (dichotomized as >4 or ≤4) using …

Strategies For Searching The Internet For Orthopedic Surgeons: Tips And Tricks, Fatih Küçükdurmaz, Md, Terry Whipple, Md, Murat Bozkurt, Md, Daniel G. Kipnis, Msi

Academic Commons and Scott Memorial Library Staff Papers and Presentations

Internet provides access to large amounts of information quickly, provides a flexible learning platform, and is easily accessible from anywhere, especially with new technologies. Web-based search engines and bibliographic databases, have already become part of a doctor's everyday life. However, even well-published researchers often fail to appreciate the background knowledge required to conduct a good literature search on the internet. Using the right techniques can improve the ability to search for relevant information This chapter briefly outlines the internet as an information resources such as Google, Google Scholar, PubMed, Cochrane for orthopedic surgeons. Also the subsequent sections of the chapter …

Negative Urgency And Lack Of Perseverance: Identification Of Differential Pathways Of Onset And Maintenance Risk In The Longitudinal Prediction Of Nonsuicidal Self-Injury, Elizabeth N. Riley, Jessica L. Combs, Carol E. Jordan, Gregory T. Smith

Psychology Faculty Publications

Many researchers have identified impulsivity-related personality traits as correlates of and risk factors for nonsuicidal self-injury (NSSI). Using a longitudinal design, we tested the hypothesis that one such trait, negative urgency (the tendency to act rashly when distressed), predicts the onset of NSSI during the first year of college and a different trait, lack of perseverance (the disposition to fail to maintain focus on tasks that are difficult or boring), predicts the maintenance of NSSI during the first year of college. In a sample of n = 1,158 college women (mean age = 18.04, 95% of participants were 18 at …

Theoretical Modeling And Analysis Of L- And P-Band Radar Backscatter Sensitivity To Soil Active Layer Dielectric Variations, Jinyang Du, John S. Kimball, Mahta Moghaddam

Numerical Terradynamic Simulation Group Publications

Freeze-thaw (FT) and moisture dynamics within the soil active layer are critical elements of boreal, arctic and alpine ecosystems, and environmental change assessments. We evaluated the potential for detecting dielectric changes within different soil layers using combined L- and P-band radar remote sensing as a prerequisite for detecting FT and moisture profile changes within the soil active layer. A two-layer scattering model was developed and validated for simulating radar responses from vertically inhomogeneous soil. The model simulations indicated that inhomogeneity in the soil dielectric profile contributes to both L- and P-band backscatter, but with greater P-band sensitivity at depth. The …

Noncontact Diffuse Optical Assessment Of Blood Flow Changes In Head And Neck Free Tissue Transfer Flaps, Chong Huang, Yu Lin, Yu Shang, Guoqiang Yu, Jeffrey Radabaugh, Rony Aouad, Thomas J. Gal, Amit B. Patel, Joseph Valentino

Biomedical Engineering Faculty Publications

Knowledge of tissue blood flow (BF) changes after free tissue transfer may enable surgeons to predict the failure of flap thrombosis at an early stage. This study used our recently developed noncontact diffuse correlation spectroscopy to monitor dynamic BF changes in free flaps without getting in contact with the targeted tissue. Eight free flaps were elevated in patients with head and neck cancer; one of the flaps failed. Multiple BF measurements probing the transferred tissue were performed during and post the surgical operation. Postoperative BF values were normalized to the intraoperative baselines (assigning “1”) for the calculation of relative BF …

Predictors Of Preschool Children's Body Mass Index: Breastfeeding Duration, Child Eating Behaviors, And Parental Feeding Practices, Amy J. Encinger

College of Education and Human Sciences: Dissertations, Theses, and Student Research

The current study examined how breastfeeding duration, child eating behaviors (Satiety and Food Responsiveness), and parental feeding practices (Environment and Parental Control over Food) are related to body mass index (BMI) among preschool-aged children. Participants were 224 primary caregivers (M age = 30.36; 90% mothers) of preschool-aged children (M age = 4.22 years, 55% male) from three Midwestern preschools serving low-income children. Mediated multiple regression analyses examined the effects of the various child eating behaviors and parental feeding practices as mediators of the relation between breastfeeding duration and child BMI. Three main findings emerged. There was a significant …

Airborne Infection In Healthcare Environments: Implications To Hospital Corridor Design, Ehsan Mousavi

Department of Construction Engineering and Management: Dissertations, Theses, and Student Research

Several studies have linked nosocomial transmission airborne diseases to airflow in healthcare settings. Quasi-experimental methods are developed to observe the aerodynamic transport behavior of synthetic respiratory particles in corridors of a hospital. Computational models, validated by experimental results, are then developed to explore the spatial relationships of supply-exhaust air ventilation in patient corridors. The aim of this study is to determine optimal HVAC design strategies to contain and remove airborne contaminants in healthcare environments.

In addition to occupant comfort, hospital HVAC systems are designed to provide ventilation and directional airflow to contain, dilute and remove contaminants including airborne disease. Of …

Carbon Storage Potential Of Windbreaks On Agricultural Lands Of The Continental United States, William Ballesteros Possu

School of Natural Resources: Dissertations, Theses, and Student Research

Agricultural production systems face major challenges under climate change scenarios in terms of expected negative impacts on productivity and persistence of the crops. Greenhouse gases from agriculture continue to rise although not as fast as from other fossil fuel-based human activities. Windbreaks perform several ecosystems functions that improve the local and regional capacity of crop systems to increase yields and offer environmental services by minimizing the negative effects of extreme weather events. Windbreaks also represent an important means of mitigating greenhouse gas emissions. This is predominantly accomplished by the windbreak trees storing carbon (C) in their above and belowground woody …

Introducing Green Manures In An Organic Soybean–Winter Wheat–Corn Rotation: Effects On Crop Yields, Soil Nitrate, And Weeds, Katja Koehler-Cole

School of Natural Resources: Dissertations, Theses, and Student Research

In organic soybean– winter wheat – corn rotations, animal manure is a common choice to maintain high yields, but leguminous crops grown as green manures after wheat harvest and incorporated into the soil before corn planting, can be an alternative when animal manure is not accessible. Forage legumes with high dry matter (DM) production and high biological N fixation have been shown to meet corn N demand. However, in Eastern Nebraska, lack of precipitation can reduce green manure growth and N fixation, leading to an insufficient N supply for corn, but corn growth can also be impacted by green manure …

Capturing The Gendiverse: A Test Of The Gender Self-Perception Scale, With Implications For Survey Data And Labor Market Measures, Alian Kasabian

Department of Sociology: Dissertations, Theses, and Student Research

This dissertation assesses a new measure of gender. In doing so, it addresses a glaring inconsistency between how sociologists conceptualize gender and how we measure it (i.e., with sex categories) in most quantitative sociological literature. Research that only measures sex effectively hides the variability in individual social identities that is related to sociological outcomes of interest. Unfortunately, most existing quantitative gender scales are impractical for use in large scale data collection. In this work, I investigated the Gender Self-perception Scale (GSPS) as an alternative survey measure of gender using three projects. For the first project (chapter 2), I used the …