Digital Commons Network^™

Effects Of Microenvironment On Growth And Differentiation Of Human Dental Pulp Cells, Laura Datko

All Theses

Dental pulp stem cells (DPSCs) have recently been described as a potential stem cell source for various regenerative medicine and tissue engineering applications. They appear to be multipotent, however more characterization is necessary to determine the true potential of these cells. An important aspect of using DPSCs, or any stem cell type, tissue engineering application is the microenvironment within the construct. The microenvironment could include construct mechanical properties, construct composition, and 3D dynamic conditions in vivo. This work aims to study those specific microenvironment effects on DPSCs. To determine the effects of mechanical properties of the substrate on DPSCs, they …

A Quantitative, Technology Independent, Fidelity Metric For Evaluating Bioprinted Patterned Co-Cultures, Matthew Pepper

All Theses

The study of cell-cell interactions is crucial in the understanding of cell behaviors such as tumor genesis, proliferation, migration, metastasis, and apoptosis. To break down the complex web of signals in vivo, researchers must replicate some parts of this environment with in vitro tissue test systems, composed of multiple cell types arranged close enough to communicate with their neighbors, i.e. high-resolution co-culture patterns. The field of bioprinting is specifically focused on creating co-culture patterns for the purposes of cell studies, but the sample resolutions of most bioprinting systems are still too coarse to permit cell communication. No way currently exists …

Effect Of Aquatic And Body Weight Supported Treadmill Exercise On Physiological And Kinematic Measures, Jessica Ensign Wing

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The purpose of this study was to examine the acute effects of underwater treadmill (UTM), body weight supported (BWS), and land treadmill (LTM) exercise on oxygen consumption (VO₂), ratings of perceived exertion (RPE), and two-dimensional kinematics of the lower extremities during. Seventeen healthy and physically active male participants between the ages of 21 and 40 years performed an exercise bout for each mode of exercise. Each exercise bout lasted 7 min, consisting of 5 min of walking and 2 min of running and using the same self-selected treadmill walking and running speeds throughout all three conditions. The VO …

Summaries Of Arkansas Cotton Research 2010, Derrick M. Oosterhuis

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Ecology And Conservation Of Cougars In The Eastern Great Basin: Effects Of Urbanization, Habitat Fragmentation, And Exploitation, David C. Stoner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research was designed to investigate cougar response to urbanization, habitat fragmentation, and exploitation from behavioral, demographic, and landscape perspectives. The source-sink model has been proposed as an alternative framework for the management of exploited cougar populations. I addressed the basic question of whether cougars conform behaviorally to the predictions of the source-sink model, and consequently, the applied question of whether the model could be used for the conservation of this species. To achieve this I evaluated three scale-specific questions using radio-telemetry and hunter-harvest data collected from 1996-2010. At the subpopulation scale, I tested the hypothesis that cougars are wildland …

To Duckweeds (Landoltia Punctata), Nanoparticulate Copper Oxide Is More Inhibitory Than The Soluble Copper In The Bulk Solution, Jiyan Shi, Aamir D. Abid, Ian M. Kennedy, Krassimira R. Hristova, Wendy K. Silk

Biological Sciences Faculty Research and Publications

CuO nanoparticles (CuO-NP) were synthesized in a hydrogen diffusion flame. Particle size and morphology were characterized using scanning mobility particle sizing, Brunauer–Emmett–Teller analysis, dynamic light scattering, and transmission electron microscopy. The solubility of CuO-NP varied with both pH and presence of other ions. CuO-NP and comparable doses of soluble Cu were applied to duckweeds, Landoltia punctata. Growth was inhibited 50% by either 0.6 mg L⁻¹ soluble copper or by 1.0 mg L⁻¹ CuO-NP that released only 0.16 mg L⁻¹ soluble Cu into growth medium. A significant decrease of chlorophyll was observed in plants stressed by 1.0 …

Low Energy (E,2e) Studies From Ch₄: Results From Symmetric Coplanar Experiments And Molecular Three-Body Distorted Wave Theory, Kate L. Nixon, Andrew James Murray, Hari Chaluvadi, Chuangang Ning, Don H. Madison

Physics Faculty Research & Creative Works

Low energy experimental and theoretical triply differential cross sections are presented for electron impact ionization of methane (CH₄) for both the highest occupied molecular orbital (HOMO) and next highest occupied molecular orbital (NHOMO). The HOMO is a predominantly p-type orbital which is labeled 1t₂ and the NHOMO is predominantly s-type labeled 2a ₁. Coplanar symmetric (symmetric both in final state electron energies and observation angles) are presented for final state electron energies ranging from 2.5 to 20 eV. The theoretical M3DW (molecular three-body distorted wave) results are in surprisingly good agreement with experiment for the HOMO …

The Lived Experiences Of Participants In The Euchee/Yuchi Language Project: A Phenomenological Study Of Language Preservation, Jessica Park

Graduate Theses and Dissertations

Native languages are disappearing quickly in this country, but there are many programs that are underway trying to save Native languages before they are gone. One such program is the Euchee/Yuchi Language Project which uses a modified version of the Master-Apprentice Language Learning Program (MALLP). Elder language speakers, masters, and younger members of the tribe, apprentices, meet daily in a two-hour language session. The goal of the session is to immerse the apprentices in the language by using conversational Euchee/Yuchi in the form of lessons, props, and presentations, so they can learn the language quickly. The purpose of this study …

University Of Alaska Anchorage Commencement Program May 2011, N/A N/A

Commencement

These official programs are distributed to attendees of the annual commencement ceremonies. The programs include the event schedule as well as the degrees and honors awarded, listing recipients of the degrees and honors. May 2011

Minerogenetic Mechanisms Occurring In The Cave Environment: An Overview, Bogdan P. Onac, Paolo Forti

School of Geosciences Faculty and Staff Publications

Perhaps man’s first motivation to explore caves, beyond using them as shelter, was the search for substances that were not available elsewhere: most of them were minerals. However, for a long time it was believed that the cave environment was not very interesting from the mineralogical point of view. This was due to the fact that most cave deposits are normally composed of a single compound: calcium carbonate. Therefore, the systematic study of cave mineralogy is of only recent origin. However, although only a limited number of natural cavities have been investigated in detail, about 350 cave minerals have already …

Social Memory And Landscape: A Cross-Cultural Examination, Joshua L. Stewart

Student Publications

The study of social memory and landscape in archaeological contexts is a recent trend in social archaeological theory. As such, and despite the flexibility, applicability, and usefulness of this approach, not many sites or societies have been studied from this perspective. The purpose of this examination is to demonstrate the flexibility, applicability and usefulness of the interpretive frameworks by applying it to three disparate sites and societies which are vastly different culturally, spatially and temporally. Research at these sites has not focused on issues of social memory and landscape, despite their perfect suitability.

Putting The Puzzle Together: Factors Related To Emotional Well-Being In Parents Of Children With Autism Spectrum Disorders, Olivia F. Macdonald

Honors Thesis and Capstone Projects

Autism spectrum disorders now affect 1 in 110 children. Thus, thousands of families are facing the unique challenges associated with raising a child with an ASD. The purpose of the current study was to investigate how parental well-being relates to coping strategies, social support, and isolation. Mothers and fathers were recruited through the email lists of autism organizations, and 221 parents completed an anonymous, online survey. A decrease in reported feelings of anxiety and depression with greater use of social support supported the literature on the beneficial role it has on emotional well-being. Analyses also suggested that informal sources of …

An Examination Of The Mind-Body Coordination Of Vocal Technique, Justina Mathew

Honors Thesis and Capstone Projects

This paper seeks to review the principles of vocal technique as seen from both an artistic and scientific standpoint and ultimately connect these two seemingly incompatible entities. This paper also seeks to review the application of physics to singing; specifically, enhanced coordination between the neural center of the body – the brain – in distinct cortical areas with extremely complex musculature and associated vocal tissues necessary for the production of musical notes. Biophysical modeling can be used to study these intricate processes vis-à-vis the relationship between certain variables such as tract air pressures and the gradients required for song. Such …

Response To Reasonable Expectations In Sociocultural Context, David G. Epstein

Law Faculty Publications

The Article starts 6 (and ends)7 with the premise that contract law should enforce the reasonable expectations of the parties. This is a hard premise to challenge.8 And an even harder premise to apply.9 The Article recognizes the two problems with applying this premise: (1) how does a court decide what expectations are “reasonable,”10 and (2) what does a court do when the contracting parties have different reasonable expectations.11 The Article then uses two cases to illustrate how “sociocultural dissonance between a judge and contracting party”12 exacerbates these problems.

Row Reduction Of Macaulay Matrices, Lorrin Debenport

Honors Theses

A computer can use a matrix to represent a system of non-linear multivariate polynomial equations. The fastest known ways to transform this system into a form with desirable computational properties rely on transforming its matrix into upper-triangular form [8, 9]. The matrix for such a system will have mostly zero entries, which we call sparse [7]. We propose to analyze several methods of performing row-reduction, the process by which matrices are reduced into upper-triangular form [2].

What is special about row-reducing matrices in this context? When row-reducing a matrix, swapping rows or columns is typically acceptable. However, if the order …

Transparent, Deborah Ann Herzog

Arrow Rock

No abstract provided.

Arrow Rock, 2010-2011, Full Issue

Arrow Rock

No abstract provided.

Aerodynamic Performance Of Extended Formation Flight, Andrew Ning, Tristan Flanzer, Ilan Kroo

Faculty Publications

Close formation flight is of limited practicality for commercial aviation. Our concept of extended formation flight takes advantage of the persistence of cruise wakes by extending the streamwise spacing between aircraft in a formation. This allows the aircraft to fly at safe separation distances from each other, while still benefiting from the upwash of the upstream wake(s). In this paper we are interested in estimating the performance of these extended formations, and estimating some of the effects that limit the longitudinal extent of the formation. We consider the effects of wake rollup, vortex decay, vortex instabilities, vortex motion, and atmospheric …

The Antimicrobial Activity Of Cold Pressed Terpeneless Valencia Orange Oil At Cold Temperatures, Sean Jeffrey Pendleton

Graduate Theses and Dissertations

This research was undertaken to identify an antimicrobial for use during chilling in beef processing, including periods of temperature abuse, as well as to evaluate membrane filtration as means to remove essential oils from bacteria to prevent further antibacterial action. Cold pressed terpeneless Valencia orange oil was examined in combination with various temperatures (37°C, 10°C, and 4°C) to determine its antimicrobial activity against various strains of bacteria. The strains were tested using a ninety-six well microtiter plate method, with or without membrane filtration. The compound 2, 3, 5-triphenyl tetrazolium chloride was used as a growth indicator. Serial, two fold dilutions …

Defining The Regional And Seasonal Climatic Response Of Long Douglas-Fir Tree-Ring Chronologies In Central Mexico, Grant Howard West

Graduate Theses and Dissertations

Problems with instrumental climate data and difficulties arising from the distribution of sensitive, long-term tree-ring chronologies across Mexico's complex terrain have made it difficult to model the climate signal of tree-rings in Mexico. The objective of this research is to utilize the improved long-term, high-resolution, gridded instrumental climate dataset for Mexico recently developed by Zhu and Lettenmaier (2007) to document the climate signal of Douglas-fir in central Mexico. Through correlation analysis between five Douglas-fir tree-ring chronologies created by the University of Arkansas-Fayetteville Tree-Ring Laboratory and Zhu and Lettenmaier's (2007) gridded historical climate dataset, this research aims to define the regional …

Early Modern Evil Genius: Hyperconformity And Objectivity In Sixteenth And Seventeenth-Century English Literature, Christine Hoffmann

Graduate Theses and Dissertations

This dissertation studies the response among early modern and postmodern audiences to the experience of information overload, and suggests that the most appealing response to living in a communications network that appears both systematic and random is to use a rhetoric of struggle that is ambiguous in the same way. >The reasons for this appeal are twofold: firstly, the rhetoric of struggle is a way to cope with the difficulty of situating oneself within a system of circulating information that operates according to its own arbitrary rules. Mimicking that arbitrariness is a way of finding aesthetic synchronicity between how one's …

Community Expectations Of College Attendance And Completion, Michael Wade Derden

Graduate Theses and Dissertations

Communities relay expectations of behavior that influence residents' decision making processes. The study's purpose was to define and identify Social, cultural, and human capital variables relevant to understanding community expectations of postsecondary attainment. The study sought an operational model of community expectancy that would allow policymakers and higher education leaders to recognize the community-level factors affecting student outcomes and then to make appropriate policy adjustments to encourage better outcomes.

Protein-Lipid Interactions: Influence Of Anchoring Groups And Buried Arginine On The Properties Of Membrane-Spanning Peptides, Vitaly V. Vostrikov

Graduate Theses and Dissertations

Designed transmembrane peptides were employed for investigations of protein-lipid interactions by means of oriented solid-state deuterium NMR spectroscopy using isotope-enriched alanine residues. Using the model GWALP23 sequence (GGALW(LA)6LWLAGA) as a host peptide having single interfacial tryptophan anchor residues, the effects of different guest mutations were explored. Replacements of glycine residues 2 and 22 to positively charged lysine or arginine on both termini had little influence on the peptide average orientation. Conversely, glycine to tryptophan substitutions had profound effects, manifested in the increased dynamics and altered tilt direction of the peptide. While the charged residues at the peptide termini did not …

Factors Affecting Institutional Choice Of Minority Students Admitted To Institutions In The Council For Christian Colleges And Universities, Christopher Lee Confer

Graduate Theses and Dissertations

The study examined the factors that affected minority students' choice to enroll at private faith-based 4-year institutions in the Council of Christian Colleges and Universities (CCCU) in the United States. These factors included: minority students' demographic and background characteristics, financial factors, perceived institutional characteristics, and institutional marketing strategies. The theoretical framework for this study focused on Maguire and Lay's (1981) college choice model as well as Hossler and Gallagher's (1987) three phase college choice theory. This study also drew on the Critical Race Theory as a lens through which to examine minority student college choice. The study utilized the data …

An Empirical Investigation Of Emotional Reactivity And Elevated Mental Contamination: A Comparison Of Sexual And Physical Assault, Christal Badour

Graduate Theses and Dissertations

Although evidence suggests that disgust and disgust-related phenomena such as mental contamination should be associated with the experience of sexual assault, there has been relatively little direct examination of this relation. Consequently, the primary aim of the current study was to conduct a multimodal assessment of disgust and mental contamination-based reactivity to an individualized script-driven imagery procedure. Participants included 27 sexually assaulted, 25 physically assaulted, and 30 non-traumatized control female adults. Subjective reactivity (i.e., ratings of disgust, anxiety, feelings of dirtiness, and urges to wash), physiological reactivity (i.e., electromyogram activity of the right levator labii superioris and medial frontalis regions) …

New Interfacial Nanochemistry On Sensory Bioscaffold-Membranes Of Nanobelts, Feng Chen

Graduate Theses and Dissertations

Nanostructured bioscaffolds and biosensors are evolving as popular and powerful tools in life science and biotechnology, due to the possible control of their surface and structural properties at the nm-scale. Being seldom discussed in literature and long-underexploited in materials and biomedical sciences, development of nanofiber-based sensory bioscaffolds has great promises and grand challenges in finding an ideal platform for low-cost quantifications of biological and chemical species in real-time, label-free, and ultrasensitive fashion. In this study, titanate nanobelts were first of all synthesized, from hydrothermal reactions of a NaOH (or KOH solution) with TiO2 powder, to possess underexploited structure and surface …

The Effects Of Ovariecotomy On Neuropeptide Y Neurotransmission In Skeletal Muscle Arterioles, Kirk Wendell Evanson

Graduate Theses and Dissertations

The purpose of this study was to determine the effects of chronic estrogen supplementation on NPY neurotransmission in gastrocnemius first-order arterioles (G1A) of adult female rats. Female rats (4 mo; n = 30) were ovariectomized (OVX) with a subset (n = 15) receiving an estrogen pellet (OVE; 17β-estradiol (4μg / day)). Following conclusion of the treatment phase (8 weeks), red G1A were excised, placed in a physiological saline solution (PSS) bath, and cannulated with micropipettes connected to albumin reservoirs. A sampling port was placed immediately below the vessel to assess NPY overflow. The contralateral red G1A was homogenized in PSS …

Symmetry-Based Techniques For Qualitative Understanding Of Rovibrational Effects In Spherical-Top Molecular Spectra And Dynamics, Justin Chadwick Mitchell

Graduate Theses and Dissertations

Using light to probe the structure of matter is as natural as opening our eyes. Modern physics and chemistry have turned this art into a rich science, measuring the delicate interactions possible at the molecular level.

Perhaps the most commonly used tool in computational spectroscopy is that of matrix diagonalization. While this is invaluable for calculating everything from molecular structure and energy levels to dipole moments and dynamics, the process of numerical diagonalization is an opaque one. This work applies symmetry and semi-classical techniques to elucidate numerical spectral analysis for high-symmetry molecules.

Semi-classical techniques, such as the Potential Energy Surfaces, …

Characterization Of Polyphenolics In Cranberry Juice And Co-Products, Brittany Lynn White

Graduate Theses and Dissertations

Historically, cranberry juice has been consumed to prevent urinary tract infections. These and other health benefits, including reduced risks of cancer and cardiovascular disease, are believed to be due to the presence of polyphenolics, specifically flavonoids. Cranberry pomace is the by-product of cranberry processing which consists of seeds and skins. This research focuses primarily on the effects of processing on the flavonoid composition of cranberries and cranberry pomace. First, the concentration of flavonoids during juice processing was evaluated. It was determined that anthocyanins were degraded readily compared to other flavonoids, and a significant amount of flavonoids were retained in the …

The Challenges Of Oral Agents As Antineoplastic Treatments, Barbara A. Given, Sandra L. Spoelstra, Marcia Grant

Peer Reviewed Articles

OBJECTIVE: Given the increasing use of oral antineoplastic agents in cancer management, patient adherence is critical to successful treatment outcomes. This article reviews the scope of the problem and issues of adherence to oral antineoplastic agents.

DATA SOURCES: Research based and other articles, newsletters, and conference presentations.

CONCLUSION: Suboptimal adherence to oral antineoplastic agents is a significant clinical problem that may result in disease or treatment complications, adjustment in treatment regimen, disease progression, and premature death.

IMPLICATIONS FOR NURSING PRACTICE: Healthcare providers need to monitor and facilitate adherence by identifying barriers and implementing strategies to assure adherence, and therefore, improve …