Digital Commons Network^™

Refusing To Be Dispossessed: African American Land Retention In The Us South From Reconstruction To World War Ii, Camille Goldmon

Graduate Theses and Dissertations

African Americans in the South were tied to the land during slavery and after emancipation. Many felt that land ownership was the key to freedom. For decades, black farmers strove for land ownership, in many cases falling prey to sharecropping and tenancy agreements in the meantime. Despite this drive toward independent farming, however, since 1920, there has been a steady decline in the number of black farm owners. This trend is especially prevalent in the Southern United States. The black farm owners who persevered through periods of economic, social, and political turmoil were able to, for varying reasons, navigate those …

Sensitivity Of Diffuse Reflectance Spectroscopy To Dose- And Depth-Dependent Changes In Tumor Oxygenation After Radiation Therapy, Daria Semeniak

Graduate Theses and Dissertations

Along with chemotherapy, immunotherapy, and surgery, radiotherapy is one of the most common treatments used against cancer. Around 50% of all cancer patients undergo radiation therapy. While for some patients radiotherapy works efficiently and lead to a complete cancer disappearance, for others treatment outcome may be less favorable due to radioresistance processes happening within a tumor on the molecular level. Radioresistance remains a big challenge for modern oncology. The ability to identify radioresistance at the early stage of radiotherapy would help physicians to improve therapy efficiency. At the current moment, despite the rapid progress in cancer understanding and diagnostic modalities, …

Development Of A One Pass Microwave Heating Technology For Rice Drying And Decontamination, Deandrae Lynette Smith

Graduate Theses and Dissertations

An industrial microwave (MW) system operating at 915 MHz frequency was used to dry high moisture content (MC) (23% to 24% wet basis) medium-grain rough rice samples (cv. Jupiter). The rice beds were contained in a modified tray that accommodated up to 9 kg of rice separated by thin fiberglass mesh in 3 kg increments. Each layer of rice was fitted with fiber optic sensors connected to a real time data logger during MW treatments. It was determined that drying rice to a MC of 14% to 16% was feasible with the application of MW specific energy at 600 kJ/kg-grain …

Evaluation Of Safening Effects To Herbicides Conferred Via Insecticide Seed Treatments In Soybean (Glycine Max) And Grain Sorghum (Sorghum Bicolor), Nicholas Robert Steppig

Graduate Theses and Dissertations

Interactions between herbicides and insecticides in crop production have been documented for a number of years. Research has shown that applications of some organophosphate insecticides at planting can reduce cotton injury following applications of the soil-applied herbicide clomazone. Additionally, recent research has shown that, when applied as seed treatments prior to planting, some neonicotinoid insecticides can safen rice to drift from both glyphosate and imazethapyr. Since insecticide seed treatments are commonly used in many crop production systems throughout the Midsouth, exploring their ability to reduce injury from herbicides in other crops besides rice is of great interest. Presently no research …

Exploring Thermoresponsive Affinity Agents To Enhance Microdialysis Sampling Efficiency Of Proteins, Thaddeus Vasicek

Graduate Theses and Dissertations

Affinity agents increase microdialysis protein relative recovery, yet they have not seen widespread use within the microdialysis community due to their additional instrumentation requirements and prohibitive cost. This dissertation describes new affinity agents for microdialysis that require no additional instrumentation to use, have nearly 100% particle recovery, are 7 times more cost efficient than alternatives, and have low specificity enabling their use for a wide variety of proteins. Initially gold nanoparticles were chosen as an affinity ligand support due to their high surface area/volume ratio and colloidal stability. Poly (N-isopropylacrylamide) was immobilized to the gold nanoparticles, which served to sterically …

The Black Maternal And Cultural Healing In Twentieth Century Black Women's Fiction, Paula Wingard White

Graduate Theses and Dissertations

This work examines representations of maternal relationships between black women in five contemporary novels: Their Eyes Were Watching God by Zora Neale Hurston, Sula by Toni Morrison, The Salt Eaters by Toni Cade Bambara, The Color Purple by Alice Walker and Louisiana by Erna Brodber. Rather than situating the origins of black feminist literary studies during the Black Women’s Literary Renaissance of the 1970s and 1980s, I argue that Hurston’s work shapes contemporary black feminist literary studies. In Their Eyes Were Watching God, Nanny provides a mothering archetype that inspires a dominant theme and practice—the black maternal, within contemporary black …

Controlled Synthesis And Utilization Of Metal And Oxide Hybrid Nanoparticles, Cameron Cowgur Crane

Graduate Theses and Dissertations

This dissertation reports the development of synthetic methods concerning rationally-designed, hybrid, and multifunctional nanomaterials. These methods are based on a wet chemical, solution phase approach that utilizes the knowledge of synthetic organic and inorganic chemistry to generate building blocks in solution for the growth of nanocrystals and hybrid nanostructures. This work builds on the prior knowledge of shape-controlled synthesis of noble metal nanocrystals and expands into the challenging realm of the more reactive first row transition metals. Specifically, a microemulsion sol-gel method was developed to synthesize Au-SiO2 dimers as precursors for the synthesis of segmented heterostructures of noble metals that …

The Effect Of Insects On Seed Set Of Ozark Chinquapin, Castanea Ozarkensis, Colton Zirkle

Graduate Theses and Dissertations

Ozark chinquapin (Castanea ozarkensis), once found throughout the Interior Highlands of the United States, has been decimated across much of its range due to accidental introduction of chestnut blight, Cryphonectria parasitica. Efforts have been made to conserve and restore C. ozarkensis, but success requires thorough knowledge of the reproductive biology of the species. Other Castanea species are reported to have characteristics of both wind and insect pollination, but pollination strategies of Ozark chinquapin are unknown. Experiments were conducted to determine the influence of insects on successful pollination of C. ozarkensis, as measured by production of burs and seeds. Exclosure treatments …

Influence Of Exogenous Phytase Level And Interaction With Supplmental Xylanase On Live Performance And Phosphorus Retention Of Broilers, Peyton Gilbert

Graduate Theses and Dissertations

Two 3-week experiments were conducted, each using 480 day-old male broilers placed randomly among 96 battery cages (5 per cage; 680cm2 per bird), to evaluate the influence of phytase supplementation, with or without supplemental xylanase, on bird performance. Individual body weights and cage feed weights were taken on days 0, 7, 14, and 21, and mean BW, body weight gain (BWG), feed intake (FI), and FCR over each period calculated. Mortality was recorded daily and used to calculate livability and adjust FCR in both trials. In trial 2, excreta was collected by cage from 14 to 21 days for bone …

Blood-Brain Barrier-On-A-Chip Systems Based On 3d Printing, Cade I. Harding

Mechanical Engineering Undergraduate Honors Theses

This research focused on the design and testing of a blood-brain barrier (BBB)-on-a-chip microfluidic device produced using 3D printing. First, COMSOL simulations were used to define dimensions of the microchannel that would most accurately replicate the flow environment imposed on the blood-brain barrier, the wall shear stress being the most important characteristic. In using COMSOL, water was used as the simulated fluid and also the testing fluid in the fabricated devices. Therefore, the microsystem is designed to produce the BBB environment using water instead of blood. The numerical simulation parameters were based on theoretical calculations performed to scale up the …

Mole Street Journal, April 2017, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry

Mole Street Journal

No abstract provided.

Nutrient Water Quality Trading: A Market-Based Solution To Water Pollution In The Natural State*, Nathan R. Finch

Arkansas Law Review

In the decades since the passage of the Clean Water Act (CWA), our nation’s waters remain impaired by dangerous levels of nutrients such as phosphorous and nitrogen, which can cause serious health impacts. Excess nutrients also have a substantial environmental impact on waterbodies, which in turn diminishes the recreational value of these resources. Efforts to control these nutrient levels place a substantial economic burden on local governments in both providing clean drinking water as well as treating wastewater. The CWA’s cooperative federalism approach divides sources of nutrient pollution into two categories: (1) point sources, and (2) nonpoint sources. Point sources …

The Law Demands Process For Rehomed Children, Sally Terry Green

Arkansas Law Review

This article argues that the same administrative or judicial process that protects children under established state law principles must also safeguard rehomed children. The states should be compelled to enact specific prohibition against the practice of rehoming. For instance, the adoption statutes should be expanded to require an administrative process where adopted children suffering from attachment disorders are identified and supported by specially staffed post adoption service agencies.

Since these disorders are often the bedrock of rehoming, this article highlights in Part II a rehoming anecdote involving severe attachment disorder of older adopted children. Part III discusses the advent of …

Ansc, Spring 2017, University Of Arkansas, Fayetteville. Department Of Animal Sciences

Animal Science Newsletter

"Dedicated to the Alumni and Friends of the Animal Sciences Department, University of Arkansas."

Mole Street Journal, February 2017, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry

Mole Street Journal

No abstract provided.

Delta‐Flux: An Eddy Covariance Network For A Climate‐Smart Lower Mississippi Basin, Benjamin R. K. Runkle, James R. Rigby, Michele L. Reba, Saseendran S. Anapalli, Joydeep Bhattacharjee, Ken W. Krauss, Lu Liang, Martin A. Locke, Kimberly A. Novick, Ruixiu Sui, Kosana Suvocarev, Paul M. White Jr.

Biological and Agricultural Engineering Faculty Publications and Presentations

Networks of remotely monitored research sites are increasingly the tool used to study regional agricultural impacts on carbon and water fluxes. However, key national networks such as the National Ecological Observatory Network and AmeriFlux lack contributions from the Lower Mississippi River Basin (LMRB), a highly productive agricultural area with opportunities for soil carbon sequestration through conservation practices. The authors describe the rationale to create the new Delta‐Flux network, which will coordinate efforts to quantify carbon and water budgets at seventeen eddy covariance flux tower sites in the LMRB. The network structure will facilitate climate‐smart management strategies based on production‐scale and …

Peptides With Antifungal Activity And Methods Of Using The Peptides, Thallapuranam Krishnaswamy Suresh Kumar, David S. Mcnabb, Yazan H. Akkam, Duy Tu Nguyen

Patents Granted

Compositions with antifungal activity and methods of using such compositions are provided herein. In particular the compositions are peptides of SEQ ID NO: 1 and variations thereof. The peptides may contain L or D amino acids and may be circularized, dimerized or otherwise modified to make the compositions resistant to proteolysis. The compositions may be used to inhibit microbial growth and in particular fungal growth.

Graduate Catalog Of Studies, 2016-2017, University Of Arkansas, Fayetteville

Graduate School Catalog of Studies

No abstract provided.

Arkansas Track & Field Media Guide, 2017, University Of Arkansas, Fayetteville. Athletics Media Relations

Arkansas Women's Track and Field

No abstract provided.

Arkansas Track & Field Media Guide, 2017, University Of Arkansas, Fayetteville. Athletics Media Relations

Arkansas Men's Track and Field

No abstract provided.

Undergraduate Catalog Of Studies, 2016-2017, University Of Arkansas, Fayetteville

Undergraduate Catalog of Studies

No abstract provided.

Arkansas Bulletin Of Water Research - Inaugural Issue 2017, Erin E. Scott, Brian E. Haggard

Arkansas Bulletin of Water Research

The Arkansas Bulletin of Water Research is a publication of the Arkansas Water Resources Center (AWRC). This bulletin is produced in an effort to share water research relevant to Arkansas water stakeholders in an easily searchable and aesthetically engaging way. This is the inaugural publication of the bulletin and will be published annually. The submission of a paper to this bulletin is appropriate for topics at all related to water resources, by anyone conducting water research or investigations. This includes but is not limited to university reserachers, consulting firms, watershed groups, and other agencies. Prospective authors should read the “Introduction …

Arkansas Women's Cross Country, 2017, University Of Arkansas, Fayetteville. Athletics Media Relations

Arkansas Women's Cross Country

No abstract provided.

Annual Report, 2016-2017, Dale Bumpers College Of Agricultural, Food, And Life Sciences (University Of Arkansas, Fayetteville). Center Of Excellence For Poultry Science

Poultry Science Annual Reports

No abstract provided.

Vertebrate Natural History Notes From Arkansas, 2017, R. Tumlison, C. T. Mcallister, H. W. Robison, M. B. Connior, D. B. Sasse, D. G. Cloutman, L. A. Durden, C. R. Bursey, T. J. Fayton, S. Schratz, M. Buckley

Journal of the Arkansas Academy of Science

Because meaningful observations of natural history are not always part of larger studies, important pieces of information often are unreported. Small details, however, can fills gaps in understanding and also lead to interesting questions about ecological relationships or environmental change. We have compiled recent observations of foods, reproduction, record size, parasites, and distribution of 30 species of fishes, new records of distribution and parasites of 2 species of amphibians, and new records of distribution, parasites, reproduction and anomalies of 11 species of mammals.

Management Skills For The Contemporary College President: A Critical Review, David V. Tolliver Iii, Jahn W. Murry Jr.

Journal of Research on the College President

This review of the literature related to the contemporary college president attempted to describe changes to the presidential role during the past 30 years. In addition to describing changes to the role, the review explores the personal, organizational, interpersonal, and leadership skills required for leading a contemporary university. The findings particularly note that with the changing demands for accountability in higher education, presidents are being forced to spend more of their time and be more focused on issues of finance, law, and public interactions. These issues tend to collide in discussions of public policy and within the framework of state …

Histology Of Rathke’S Glands In The Razor-Backed Musk Turtle, Sternotherus Carinatus (Chelonia: Kinosternidae), With Comments On Lamellar Bodies, S. E. Trauth

Journal of the Arkansas Academy of Science

I examined the histology and ultrastructure of Rathke’s glands in two adult male razor-backed musk turtles (Sternotherus carinatus) collected in northeastern Arkansas. This species possesses two pairs of Rathke’s glands that are embedded beneath marginal bones and are named according to their anatomical location (i.e., axillary and inguinal). These integumentary glands are similar anatomically to one another. Each gland is comprised of a single, highly vascularized secretory lobule, which is surrounded by a thin tunic of asymmetrically arranged, striated muscle. Two types of large secretory vacuoles characterize most of the holocrine cells produced by a relatively thin secretory …

Persistence Of Urban Stream Syndrome Effects From Point Source And Non-Point Source Pollutants, T. S. Wakefield

Journal of the Arkansas Academy of Science

In a previous study, Sager Creek, a small 1^st-3^rd order stream in northwest Arkansas was shown to be negatively impacted by urban land usage within the watershed, producing a stream that exhibited several indicators of urban stream syndrome. This included (1) physical disturbances: increases in impervious surfaces in the watershed, dams built across the stream, and alteration of the natural stream flow through the construction of retaining walls, (2) chemical disturbances: increases in electrical conductivity (EC) and total dissolved solids (TDS) as well as elevated PO₄ levels (3) and biological disturbances: low populations of pollution intolerant …

Bioassessment Of Four Karst Springs At Hobbs State Park – Conservation Area With A Focus On Diving Beetle (Dytiscidae: Hydroporinae) Species Of Concern, Scott Longing, L. A. Mack, Brian E. Haggard

Journal of the Arkansas Academy of Science

Four springs were surveyed at Hobbs State Park-Conservation Area to provide an initial bioassessment and to determine occurrences of two endemic predaceous diving beetles of concern, Heterosternuta sulphuria and Sanfilippodytes sp. Habitat in the four spring runs were dominated by bedrock and gravel substrate with heavy accumulations of leaf litter. Thirty-three taxa representing 11 orders were collected from the four springs. Non-insect taxa included Oligochaeta, Physidae, and Isopoda, and predominant insect orders included Ephemeroptera, Coleoptera, Diptera, and Trichoptera. The total number of taxa across springs ranged from seven to 19, with total abundances ranging from 39 to 86 individuals. No …

Annual Report, 2017, University Of Arkansas, Fayetteville. Dale Bumpers College Of Agricultural, Food And Life Sciences. Dept. Of Biological And Agricultural Engineering

Biological and Agricultural Engineering Department Annual Report

No abstract provided.