Digital Commons Network^™

Occurrence Of An Intersexual Blacktip Shark In The Northern Gulf Of Mexico, With Notes On The Standardization Of Classifications For This Condition In Elasmobranchs, Jill M. Hendon, David M. Koester, Eric R. Hoffmayer, William B. Driggers Iii, Angela M. Cicia

Faculty Publications

An intersexual Blacktip Shark Carcharhinus limbatus with a testis, immature female reproductive tracts (embedded), and claspers was caught in the Gulf of Mexico. Histology of the single gonad revealed that all stages of spermatogenesis were occurring; however, the absence of ovaries and a male duct system suggests that neither sex would have been functional in this individual. Intersexuality has been reported in 17 families and 36 species of elasmobranchs. The degree to which the different sexes are present in a given individual is often difficult to categorize by normal hermaphroditic standards, as this is typically an anomalous presentation in elasmobranchs. …

Commercial Relations: From Adam Smith To Field Experiments, Maria Pia Paganelli

Economics Faculty Research

Adam Smith is often referred to as the father of economics and as a promoter of free markets. In what follows, I let the first claim stand and concentrate on the second: that Adam Smith is a promoter of free markets. In particular, I take for granted, with all the necessary caveats, that Smith is a promoter of free markets (but cf. e.g. Fleischacker 2004 ; McLean 2006 ) and concentrate on how Smith promotes free markets. Smith promotes free markets for at least two reasons: efficiency and morality. There is already a vast and detailed literature on the economic …

Fracking Up The Future: Recommendations For Hydraulic Fracturing In Gonzales County, Tx, Jennifer Ince, Philip Queller, Devon Rood, Kara Shervanick

Earth and Environmental Geosciences Student Works

Despite its economic appeal, hydraulic fracturing (fracking) has sparked bitter controversy. Allegations of toxic fracking fluids and fracking-induced droughts have made fracking a major public health and environmental concern in the United States. Fracking is dependent on local conditions to a large degree; therefore, we focus on Gonzales County, located within Texas’ Eagle Ford shale region, in order to address county-specific concerns. However, our findings can be applied to help create sustainable practices for fracking in any context. Unfortunately, regulations are limited due to the 2005 Energy Policy Act that prevents federal agencies, including the EPA, from regulating fracking. In …

The Process Of Becoming An Expository Writer, Valerie Vied

Understanding by Design: Complete Collection

This unit examines short non-fiction texts centered on cultural awareness and understanding. Through analyzing model texts students will deduce organizational structures for expository writing and strategies used for effective communication. Through a variety of close reading activities, students will collect a bank of tools to incorporate into their own writing for small open ended writing assignments during the unit and the summative assessment at the end of the unit.

The performance task includes an artistic representation of culture and an expository explaining the significance of the images and symbols chosen. Students will learn to introduce an idea and logically explain …

Matter, Density, And Buoyancy [6th-8th Grade], Reid Agan

Understanding by Design: Complete Collection

This unit provides students with basic understanding of what matter is and how different states of matter interact with one another. Students use concepts of mass, volume, and density to understand natural cycles of states of matter as well as buoyancy. UNDERSTANDINGS: 1. Matter is neither created nor destroyed, but can change states. 2. State of matter is dependent on energy and density of particles. 3. Changes in states of matter causes natural continuous cycles on Earth. (water cycle, rock cycle, convection weather patterns)

A New Way Of Living: Bioeconomic Models In Post-Apocalyptic Dystopias, Margaret A. Wells

Theses and Dissertations--English

The objective of this thesis is to explore the relationship between moralities and bioeconomies in post-apocalyptic dystopias from the Victorian era to contemporary Young Adult Fiction. In defining the terms bioeconomy and biopolitics, this works examines the ways in which literature uses food and energy systems to explore morality and immorality in social orders and systems, including capitalism and our modern techno-industrial landscapes. This work examines science fiction portrayals of apocalypses and dystopias, including After London: Or, Wild England and The Hunger Games, as well as their medieval and contextual influences. These works are analyzed in light of genre …

The Everyday Spaces Of Humanitarian Migrants In Denmark, Malene H. Jacobsen

Theses and Dissertations--Geography

Through an analysis of the Danish Immigration Law and asylum system, this research illustrates how the Danish state through state practices and policies permeates and produces the everyday space of humanitarian migrants. Furthermore, it examines how humanitarian migrants experience their everyday life in the Danish asylum system. An examination of state practices in conjunction with humanitarian migrants’ narratives of space and everyday practices, offers an opportunity to explore what kind of politics and political subjectivities that can emerge in the space of humanitarian migrants. This research contribute to our understanding of first, how the securitization of migration has direct impact …

Audience Response To The Nature/Society Binary In Kurosawa’S Dersu Uzala: An Observational Online Ethnography, Laura L. Sharp

Theses and Dissertations--Geography

Geographers researching cinema have predominantly been interested in how geographic meaning is constructed and negotiated within film, but have been less productive in accounting for how these constructs are received by viewers. Using the method of observational online ethnography, I therefore investigate how fans in online reviews have interpreted the nature/society binary in the film Dersu Uzala. Working from a social constructionist view of nature I begin by deconstructing the binary as it appears in Dersu Uzala before proceeding to illustrate the way this constitutive absence is made up for by the visuality of the film’s landscapes and techniques of …

Effects Of Acute Stretch On Cardiac Electrical Properties In Swine, Anuj Agarwal

Theses and Dissertations--Biomedical Engineering

Stretch is known to result in an electrically less stable ventricular substrate, yet the reported effects of stretch on measured electrophysiological parameters have been inconsistent and even contradictory. The goal of this study was to evaluate the effects of acute mechanical stretch on cardiac electrical features thought to be key in generation of arrhythmia, namely restitution of action potential duration (APD), electrical memory, and onset of alternans.

Microelectrodes were used to record intracellular potentials pre, during, and post-stretch from isolated right ventricular tissues from swine. In separate experiments, the effects of two levels of stretch were quantified. Pacing protocols employing …

Hysteresis In Repolarization Of Cardiac Action Potentials: Effects Of Spatial Heterogeneity And Slow Repolarization Currents, Linyuan Jing

Theses and Dissertations--Biomedical Engineering

Repolarization alternans, i.e. beat-to-beat variation of repolarization of action potential, is proposed as a predictor of life-threatening arrhythmias. Restitution relates repolarization duration with its previous relaxation time, i.e. diatstolic interval (DI), and is considered a dominant mechanism for alternans. Previously, we observed that different repolarization durations at the same DI during decelerating and accelerating pacing, i.e. restitution displays hysteresis, which is a measure of “cardiac memory”.

Objective of the current study was to investigate in the pig 1) the mechanism for a previously observed hysteresis type phenomenon, where alternans, once started at higher heart rate, persists even when heart rate …

Development Of A Multilayered Association Polymer System For Sequential Drug Delivery, Sharath Kumar Chinnakavanam Sundararaj

Theses and Dissertations--Biomedical Engineering

As all the physiological processes in our body are controlled by multiple biomolecules, comprehensive treatment of certain disease conditions may be more effectively achieved by administration of more than one type of drug. Thus, the primary objective of this research was to develop a multilayered, polymer-based system for sequential delivery of multiple drugs. This particular device was designed aimed at the treatment of periodontitis, a highly prevalent oral inflammatory disease that affects 90% of the world population. This condition is caused by bacterial biofilm on the teeth, resulting in a chronic inflammatory response that leads to loss of alveolar bone …

Growth Plate Regeneration Using Polymer-Based Scaffolds Releasing Growth Factor, Amanda Clark

Theses and Dissertations--Biomedical Engineering

Currently growth plate fractures account for nearly 18.5% of fractures in children and can lead to stunted bone growth or angular deformation. If the body is unable to heal itself a bony bar forms, preventing normal bone growth. Clinical treatment involves removing the bony bar and replacing it with a filler substance, which causes poor results 60% of the time.

Using primarily poly(lactic-co-glycolic acid) (PLGA) as the scaffold material, the goal was to develop an implant that would support to the implant site, allow for cell ingrowth, and degrade away over time. Porous scaffolds were fabricated from PLGA microspheres using …

Development Of A Constitutive Model Of Compacted Shales And Determination Of The Effect Of Weathering On Its Parameters, Isabel Cristina Gomez-Gutierrez

Theses and Dissertations--Civil Engineering

Compacted shales cause problems because they tend to degrade with time due to weathering. Degradation results in the shale deteriorating from a hard rock-like material to a soft fine-grained soil mass with lower shear strength and high deformability. Consequently, common problems that occur in embankments constructed with compacted shales include settlement and instabilities. Therefore, accelerating weathering prior to compaction by wetting and breaking down the shales before placement can reduce the deterioration during the service life of the construction. Extensive laboratory testing was performed in order to characterize the mechanical behavior of compacted shales.

Critical State theory is a clever …

Sacred, Suspect, Forbidden: The Use Of Space In Early Modern Venice, Julie D. Fox

Theses and Dissertations--History

This dissertation argues that Venetian space in the sixteenth century was embedded with various boundaries that individuals challenged and that communities and Venetian secular and ecclesiastical authorities reinforced. The development of Venetian urban space played an essential role in the formation of Venetian civic identity, which in turn was predicated upon the myth of Venice. The time period examined includes the re-establishment of the Roman Inquisition, and the early period of the Inquisition in Venice, which were concomitant with a time of religious and social disruption. Documents of the Venetian government and contemporary diarists offer contextual evidence; however, trials before …

Honor, Reputation, And Conflict: George Of Trebizond And Humanist Acts Of Self-Presentation, Karl R. Alexander

Theses and Dissertations--History

The present study investigates the verbal strategies of self-presentation that humanist scholars employed in contests of honor during the early fifteenth century. The focus of this study is George of Trebizond (1395-1472/3), a Cretan scholar who emigrated to Italy in 1416, taught in Venice, Vicenza, and elsewhere, served as an apostolic secretary in Rome, and composed the first major humanist treatise on rhetoric, his Rhetoricorum libri quinque, in 1433/34. Trebizond feuded with many prominent humanists during his career, including Guarino of Verona (1374-1460) and Poggio Bracciolini (1380-1459). His quarrels with both men illustrate how humanist conflicts were the sites upon …

More Than An "Immoderate Superstition": Christian Identity In The First Three Centuries, Edward Mason

Theses and Dissertations--History

Only recently have scholars given particular attention to the development of the racial discourse present in early Christian apologetics. This study is aimed at understanding the Latin and Greek literary antecedents to the development of a Christian discourse on race and identity and examining in detail the apex of this discourse in the work of third century apologist Origen of Alexandria. Origen’s work represented the apex of an evolving discourse that, while continuing to use traditional vocabulary, became increasingly universalizing with the growth of the Roman Empire. By understanding how Christians in the first three centuries shaped their attitudes on …

Local Women: The Public Lives Of Black Middle Class Women In Kentucky Before The “Modern Civil Rights Movement", Karen Cotton Mcdaniel

Theses and Dissertations--History

This dissertation looks at the responses of African American club women to the challenging racial environment of Kentucky from the late 1800s through the early decades of the 20th century. It explores their efforts to negotiate the dialectical relationship between local circumstances and national movements. While most discussions of club women argue that their work merely enabled respectability, this dissertation argues that its real significance lies in the way black club women established support systems and communication systems for other forms of activism. The black women's club movement is the communication arena which establishes networks for advancing the direct action …

The Causes And Consequences Of Individual Variation In Parental Care Behavior, Daniel P. Wetzel

Theses and Dissertations--Biology

Behavioral traits can be remarkably flexible depending on the conditions in which they are expressed, yet, in spite of this flexibility, persistent differences between individuals appear to limit the potential expression of behaviors. For example, despite evidence that parents provide variable amounts of parental care in response to changing environmental conditions, they also differ in the overall level of care they provide. I used a behavioral reaction norm approach to study individual variation in parental care behavior in free-living house sparrows (Passer domesticus). I investigated the nature of this variation by studying the relationship between different forms of …

Distribution And Impacts Of Petroleum Hydrocarbons In Louisiana Tidal Marsh Sediments Following The Deepwater Horizon Oil Spill, Rachel S. Hatch

Theses and Dissertations--Earth and Environmental Sciences

Following the 2010 Deepwater Horizon (DWH) spill, sediment cores were analyzed from marshes at various levels of oiling to determine how deeply oil penetrated sediment in these marsh environments, and if at these sites it had quantifiably affected benthic ecosystems. Minimum mixing depths were determined from penetration of the lithogenic radionuclide ²³⁴Th, which ranged from 0.25 to 4.5 cm. Sediment accumulation rates were determined using ²¹⁰Pb, with verification from ¹³⁷Cs in selected cores. Lead-210 profiles revealed long-term (decadal) mixing. Bay Jimmy, Louisiana was significantly affected by the DWH oil spill, as indicated by total polycyclic aromatic hydrocarbon …

Ecological Restoration's Genetic Culture: Participation And Technology In The Making Of Landscapes, Jairus Rossi

Theses and Dissertations--Geography

Practitioners of ecological restoration are increasingly adopting a genetic perspective when recreating historical landscapes. Genes are often endowed with the capacity to reveal specific and distinct relationships between organisms and environments. In this dissertation, I examine how genetic technologies and concepts are shaping ecological restoration practices. This research is based on two and a half years of fieldwork in Chicago. I employed participant observation and semi-structured interviews to compare how restorationists in two plant science institutions employ genetic concepts in their projects. One institution uses high-tech genetic methods to guide practice while the other uses lower-tech genetic approaches. Each group …

Identifying Risk And Protective Factors Of Preparatory And Non-Preparatory Students In Agricultural Education Programs Of A Rural Kentucky High School, Randy J. Adams

Theses and Dissertations--Community & Leadership Development

Today there is an increased demand for secondary agriculture education programs to prepare students to be college and career ready through a program of study. The purpose of this study was to identify risk and protective factors of preparatory and non-preparatory students within an agriculture education program at Anderson County High School in Lawrenceburg, Kentucky. The results of this study did not determine that there was a difference in risk and protective factors between preparatory and non-preparatory students within agriculture education courses. The study concluded that students among both categories were equally exposed to risks such as family conflict and …

Impact Of Transformational Leadership: Exploring The Transformational Leadership Qualities Of Selected Secondary Agriculture Teachers, Ryan H. Thomas

Theses and Dissertations--Community & Leadership Development

The purpose of this study is to determine if transformational leadership styles of agriculture teachers in Jessamine County has an impact on successful transitions of program completers. To be more specific, the focus was to look at agriculture teachers at Jessamine Career and Technology Center (JCTC) to see if they exhibit components of transformational leadership. If so, does transformational leadership of those teachers assist students with successful transitions after graduation? Successful transition is deemed by the Kentucky Department of Education as students that seek post-secondary education, employed full-time or enlist in a branch of armed services.

The population for this …

Analyzing Healthy, Local Food Systems: A Case Study Of Owensboro, Kentucky, Callie Hayden

Theses and Dissertations--Community & Leadership Development

Across the US, support is ever-growing for the local food movement. This growing trend promotes food security, supports farming families, ensures universal access to safe and healthy food products, enhances local economies, and encourages environmental and social well-being. People around the US are implementing sustainable local food systems as a means of meeting their individual community’s needs. While this movement is being popularized dramatically around the world, many cities and regions have yet to address it. This study reviews the existing literature on local food system models in an effort to answer the research question: What are the “ingredients” of …

Evaluation Of Motivation And Professional Development Of Curriculum For Agricultural Science Education (Case) Lead And Master Teachers, Miranda Rose Chaplin

Theses and Dissertations--Community & Leadership Development

Curriculum for Agricultural Science Education™ (CASE) is an instructional system of support that provides professional development, curriculum, and assessments to agricultural educators. Through the CASE model, two CASE Lead or Master Teachers facilitate professional development, known as a CASE Institute. This study utilizes three sets of surveys to describe the motivation for CASE certified teachers applying to become CASE Lead and Master Teachers, determine the effectiveness of the professional development provided to Lead and Master Teachers during the Lead Teacher Orientation, and determine the Lead and Master Teachers’ demographic information.

Investigation Of Media Ingredients And Water Sources For Algae Co2 Capture At Different Scales To Demonstrate The Correlations Between Lab-Scale And Large-Scale Growth, Tabitha Graham

Theses and Dissertations--Biosystems and Agricultural Engineering

As energy use increases globally the environmental burdens increase alike. Many accusations have been made that carbon dioxide is a culprit of climate change. The University of Kentucky and Duke Energy Power have partnered to test carbon capture technology in a large scale project. To this end, the objective of this thesis is to investigate potential water media sources and nutrient sources at different volume scales for algae cultivation to help create a more environmentally viable and economically feasible solution. This work will conduct a life cycle assessment of water media sources and the effects of the inputs and outputs …

Alkaline Hydrogen Peroxide Pretreatment For Its Use In An On-Farm Bioprocessing Facility, Mary Kathryn Gray

Theses and Dissertations--Biosystems and Agricultural Engineering

Pretreatment is an essential step in biofuel production from lignocellulose. Disruption of the lignin structure gives enzymes and fermentation organisms access to long chains of cellulose and hemicellulose. For this project’s purposes, the pretreatment must work within the framework of an on-farm butanol bioprocessing facility. Alkaline hydrogen peroxide (AHP) is a delignification method that potentially provides several advantages. At the alkaline pH, powerful hydroxyl radicals are formed; which attack lignin. The objectives of this study were to determine if AHP removes substantial lignin for the feedstocks, corn stover, wheat straw, switchgrass and miscanthus, and to determine if AHP acts as …

Nutrients Recycling Strategy For Microalgae-Based Co2 Mitigation System, Xinyi E

Theses and Dissertations--Biosystems and Agricultural Engineering

Coal-fired electricity production is the major emitter of CO₂ and other greenhouse gases including NO_x and SO_x. Microalgae-based CO₂ mitigation systems have been proposed to reduce the net CO₂ emission from coal-fired power plants. This study focused on developing an optimum culture media and exploring the possibilities for recycling nutrients, which were added as commercial mineralized chemicals at the beginning of cultivation.

In order to release the nutrients embedded in the cells so that they can be used as a nutrient source for new cells, Scenedesmus biomass was digested by anaerobic bacteria. Results showed …

On T Cell Fate Decisions: Retinol, Metabolism And Itreg Differentiation, Gavin I. Ellis

Theses and Dissertations--Microbiology, Immunology, and Molecular Genetics

The mammalian immune system is equipped to both eliminate pathogenic microorganisms and tumors, while remaining in homeostasis with commensal species at mucosal surfaces and tolerant towards self. Suppressor regulatory T cells (Tregs) are a major sentinel of this immunological tolerance. Induced Tregs (iTregs) arise in the periphery following the integration of cues from the metabolites, cytokines, etc. which make up its milieu. Dysregulation of iTreg development, function or homing underlies the etiology of many autoimmune diseases and immunopathologies. The amelioration or prevention of multiple murine disease models by boosting Treg cell numbers foreshadows clinical efficacy of iTreg therapy, but an …

Effects Of Intranasally Administered Dnsp-11 On The Central Dopamine System Of Normal And Parkinsonian Fischer 344 Rats, James H. Sonne

Theses and Dissertations--Neuroscience

Due to the blood-brain barrier, delivery of many drugs to the brain has required intracranial surgery which is prone to complication. Here we show that Dopamine Neuron Stimulating Peptide 11 (DNSP-11), following non-invasive intranasal administration, protects dopaminergic neurons from a lesion model of Parkinson’s disease in the rat. A significant and dose-dependent increase in an index of dopamine turnover (the ratio of DOPAC to dopamine) was observed in the striatum of normal young adult Fischer 344 rats by whole-tissue neurochemistry compared to vehicle administered controls.

Among animals challenged with a moderate, unilateral 6-hydroxy-dopamine (6-OHDA) lesion of the substantia nigra, those …

Molecular And Cellular Characterization Of Dopamine Neuron Stimulating Peptides, Kristen Kelps

Theses and Dissertations--Neuroscience

Parkinson’s disease, the second most common neurodegenerative disease, is characterized by the loss of dopaminergic neurons within the substantia nigra. Currently, the treatments available for PD are symptomatic treatments that do not stop the progression of the disease. Trophic molecules, such as glial cell-line derived neurotrophic factor (GDNF), have been evaluated as potential therapeutic molecules that could stop the loss of neurons and potentially restore some of the neurons that have already been lost. However, these trophic molecules are large making them difficult to produce and delivery. Here we characterize three peptides (DNSP-5, DNSP-11, and DNSP-17) to determine it they …