Digital Commons Network^™

Characterization Of Soil Carbon Stabilization In Long-Term Row-Cropped Agro-Ecosystems, Soraya Patricia Alvarado-Ochoa

University of Kentucky Doctoral Dissertations

Soil organic matter (SOM) is a dynamic soil property, sensitive and responsive to many factors. The possibility of increasing soil carbon (C) sequestration by changing land use and management practices has been of great interest recently due to concerns with global changes in the atmospheric carbon dioxide (CO₂) balance. Nonetheless, as a result of the complex dynamics of SOM, there is still the need for SOM characterization procedures capable of monitoring SOM stabilization, taking into account all the factors involved.

This study characterized SOM stabilization as affected by management practices in three long-term field experiments, considering physical, chemical …

Targeted Polymeric Biomaterials For The Prevention Of Post Surgical Adhesions, John M. Medley

University of Kentucky Doctoral Dissertations

Despite recent advances in surgical technique and the development of numerous therapeutic agents, the formation post surgical adhesions (PSA) continues to cause complications for many patients. In this research, we have employed a rational system to develop a novel treatment to address this clinical need. Based on an understanding of the biochemical events that lead to PSA formation, a series of targeted polymeric biomaterials was designed to interrupt the fibrin gel matrix propagation and suppress PSA formation.

Using group transfer polymerization, a series of well controlled block copolymers of polyacrylic acid and poly(ethylene glycol-methacrylate) based materials was synthesized. Subsequent functionalization …

Modulation Of The Alpha-7 Nicotinic Acetylcholine Receptor Following Experimental Rat Brain Injury Improves Cellular And Behavioral Outcomes, Thomas Matt Woodcock

University of Kentucky Doctoral Dissertations

Traumatic brain injury (TBI) is a leading cause of death and long-term disability worldwide, and survivors are often left with cognitive deficits and significant problems with day to day tasks. To date, therapeutic pharmacological treatments of TBI remain elusive despite numerous clinical trials. An improved understanding of the molecular and cellular response to injury may help guide future treatment strategies. One promising marker for brain injury is the translocator protein (TSPO), which is normally expressed at a low level, but is highly expressed following brain damage and is associated with neuroinflammation. The isoquinoline carboxamide PK11195 binds selectively to the TSPO …

The No. 5 Block In Eastern Kentucky: A Critical Re-Examination Of The Petrology With Special Attention To The Origin Of Inertinite Macerals In The Splint Lithotypes, Allison Ranae Richardson

University of Kentucky Master's Theses

Microbes, including fungi and bacteria, and insects are responsible for the consumption and subsequent degradation of plant materials into humus. These microbes directly and indirectly affect the physical and chemical characteristics of coal macerals. Efforts to understand and determine the origins of inertinite macerals are largely misrepresented in the literature, conforming to a single origin of fire. This study focuses on the variability of physical and inferred chemical differences observed petrographically between the different inertinite macerals and discusses the multiple pathways plant material may take to form and or degrade these macerals.

Petrographic results show that fungal activity plays a …

Spiny Amaranth Control And Aminopyralid Persistence In Kentucky Pastures, Meghan Elizabeth Edwards

University of Kentucky Master's Theses

Spiny amaranth is a problematic weed of heavily grazed pastures in Kentucky and surrounding states. The first objective was to evaluate spiny amaranth control when herbicides are applied before and after emergence. Spiny amaranth seed collected in 2008 were seeded in rows in the fall (November) and the following spring (March) in fields located near Lexington and Princeton, KY. Treatments consisted of five application dates and five herbicides plus an untreated control arranged in a split-split plot design. The following parameters were measured: fresh weight, plant height and percent visual control. At both locations pendimethalin applied in November, March and …

Impact Of High-Input Production Practices On Soybean Yield, Daniel L. Jordan

University of Kentucky Master's Theses

High-input management practices are often heavily marketed to producers to increase soybean [Glycine max (L) Merr.] yield in already high-yielding environments. Field research was conducted in three locations within 6 states (Arkansas, Iowa, Kentucky, Louisiana, Michigan, and Minnesota) in 2009 to determine the effect of seed treatment, inoculant, foliar fungicide, additional soil fertility beyond state recommendations, foliar fertilizer, increased population over state recommendations, and narrow row spacing on yield. The high-input system (combination of the management practices) yielded higher than standard-input system (University recommended management practices) in only 8 of the 18 locations. Narrow rows, in both the high …

Effects Of Livestock Antibiotics On Nitrification, Denitrification, And Microbial Community Compositon In Soils Along A Topographic Gradient, Sagarika Banerjee

University of Kentucky Master's Theses

Several types of antibiotics (roxarsone, virginiamycin, and bacitracin) are widely included in poultry feed to improve animal growth yields. Most of the antibiotics are excreted in manure which is subsequently applied to soils. One concern with this practice is that antibiotics may affect several microbially-mediated nutrient cycling reactions in soils that influence crop productivity and water quality. The main objectives of this study were to determine the effects of livestock antibiotics on nitrification, denitrification, and microbial community composition in soils along a topographic gradient. These objectives were addressed in a series of lab experiments by monitoring changes in inorganic N …

Shelter Availability, Occupancy, And Residency In Size-Asymmetric Contests Between Rusty Crayfish, Orconectes Rusticus, Nathan M. Klar

University of Kentucky Master's Theses

Contest outcomes are usually determined by differences in resource holding potential, the social histories of the combatants, and perceptions of resource value. One understudied aspect of gaining an advantage is the residency effect. Prior occupancy of a particular place can affect the knowledge and motivation of the resident. There could be a tactical advantage in knowing the terrain or an increased willingness to fight to maintain control of a familiar area. In this study we evaluated the importance of shelter residency effects relative to size differences between rusty crayfish (Orconectes rusticus) as potential competitors for access to shelter. …

Hydraulic Geometry Relationships And Regional Curves For The Inner And Outer Bluegrass Regions Of Kentucky, Ruth Roseann Brockman

University of Kentucky Master's Theses

Hydraulic geometry relationships and regional curves are used in natural channel design to assist engineers, biologists, and fluvial geomorphologists in the efforts undertaken to ameliorate previous activities that have diminished, impaired or destroyed the structure and function of stream systems. Bankfull channel characteristics were assessed for 14 United States Geological Survey (USGS) gaged sites in the Inner Bluegrass and 15 USGS gaged sites in the Outer Bluegrass Regions of Kentucky. Hydraulic geometry relationships and regional curves were developed for the aforementioned regions.

Analysis of the regression relationships showed that bankfull discharge is a good explanatory variable for bankfull parameters such …

Relational Maintenance Behaviors In The Grandchild–Grandparent Relationship, Daniel H. Mansson, Scott A. Myers, Lynn H. Turner

College of Communication Faculty Research and Publications

This study examined grandchildren's use of relational maintenance behaviors when interacting with their grandparents and how these behaviors are associated with grandchildren's perceived communication satisfaction with their grandparents and grandparent provision of communication-based emotional support. Undergraduate students (N = 238) reported on their relationships with the grandparent with whom they had the most recent interaction. Results indicate that grandchildren use (in descending order) the positivity, conflict management, tasks, assurances, networks, advice, and openness relational maintenance behaviors. Perceived grandparent provision of communication-based emotional support and grandchildren communication satisfaction with grandparents were directly and positively related to grandchildren's use of relational …

Creating An Interactive And Dichotomous Key To The World Subfamilies Of Braconidae, Kacie Jo Johansen

University of Kentucky Master's Theses

Members of Braconidae (Hymenoptera: Ichneumonoidea) are mostly parasitoids of other holometabolous insects. It is a large family with a little over 18,000 described species and many more to be described. Subfamily classification in this group has been unstable and resolution of phylogenetic history at the subfamily level has been problematic. Since 1993, no new keys to the subfamilies of Braconidae have been produced. Many taxonomic and phylogenetic changes have taken place since then, including a recent phylogeny proposing 47 subfamilies and representing the most robust and resolved analysis to date. A pressing need for new keys to the world subfamilies …

Opioid-Cannabinoid Codrugs With Enhanced Analgesic And Pharmacokinetic Profile, Harpreet Kaur Dhooper

University of Kentucky Doctoral Dissertations

The central hypothesis of the dissertation is that “the design and synthesis of a codrug of an opiate and a cannabinoid can be achieved which is stable in the gastrointestinal tract and shows a superior pharmacological and pharmacokinetic profile when compared to a physical mixture of the two parent drugs.” To prove the hypothesis, a series of novel codrugs were prepared by conjugation of the opiate drug codeine with Δ⁹-tetrahydrocannabinol (Δ⁹-THC), cannabidiol, abn-cannabidiol and an opiate prodrug 3-O-acetylmorphine with Δ⁹-THC. Codeine-cannabinoid codrugs were evaluated for analgesic activity in the rat after oral administration. The …

Role Of Group X Secretory Phospholipase A2 In Murine Adipocytes, Xia Li

University of Kentucky Doctoral Dissertations

The secretory phospholipase A₂ (sPLA₂) family is a group of enzymes that catalyze the hydrolysis of glycerophospholipids at the sn-2 position, generating free fatty acids and lysophospholipids. The sPLA₂ family has been implicated in various physiological and pathological activities. Eleven sPLA₂’s have been identified in mammals, and the function of each isoform likely reflects its tissue distribution and substrate specificity. Studies in vitro indicate that Group X (GX) sPLA₂ potently releases arachidonic acid (AA) and lysophosphatidylcholine from mammalian cell membranes. Interestingly, some of the biological effects mediated by GX sPLA₂ in vitro …

The Legal Challenge Of Protecting Animal Migrations As Phenomena Of Abundance, Robert L. Fischman, Jeffrey B. Hyman

Articles by Maurer Faculty

Animal migrations are as familiar as geese in the sky on a fall afternoon and as mysterious as the peregrinations of sea turtles across thousands of miles of open ocean. This article discusses the distinguishing attributes of animal migrations, why they are important to biodiversity conservation, and the legal challenges posed by migration conservation. In particular, the article focuses on those aspects of migration conservation that existing law, dominated by imperiled species protection, fails to address. It consequently suggests law reforms that would better conserve animal migrations. A step toward serious legal efforts to protect the process and function of …

Adobe Medicus 2010 1 January-February, Health Sciences Library And Informatics Center

adobe medicus

No abstract provided.

Calendar Year 2010 Report To The Rio Grande Compact Commission, Dick Wolfe, John R. D'Antonio, Patrick R. Gordon

Law of the Rio Chama

No abstract provided.

Stigmatization Of Women With Hiv/Aids Among College Students, Alex R. Parkhouse

Theses and Dissertations

No abstract provided.

Gender Role Stereotypes In Children's Literature : A Content Analysis Of Award Winning Children's Books, Mary A. Woinarowicz

Theses and Dissertations

No abstract provided.

Thermocrinis Minervae Sp. Nov., A Hydrogen And Sulfur-Oxidizing, Thermophilic Member Of The Aquificales From A Costa Rican Terrestrial Hot Spring, Sara L. Caldwell, Yitai Liu, Isabel Ferrera, Terry Beveridge, Anna-Louise Reysenbach

Biology Faculty Publications and Presentations

A thermophilic bacterium, designated strain CR11T , was isolated from a filamentous sample collected from a terrestrial hot spring on the south-western foothills of the Rincón volcano in Costa Rica. The Gram-negative cells are approximately 2.4–3.9 mm long and 0.5–0.6 mm wide and are motile rods with polar flagella. Strain CR11T grows between 65 and 85 6C (optimum 75 6C, doubling time 4.5 h) and between pH 4.8 and 7.8 (optimum pH 5.9–6.5). The isolate grows chemolithotrophically with S0 , S2O2{ 3 or H2 as the electron donor and with O2 (up to 16 %, v/v) as the sole electron …

The Isolation Of Viruses Infecting Archaea, Kenneth M. Stedman, Kate Porter, Mike L. Dyall-Smith

Biology Faculty Publications and Presentations

A mere 50 viruses of Archaea have been reported to date; these have been investigated mostly by adapting methods used to isolate bacteriophages to the unique growth conditions of their archaeal hosts. The most numerous are viruses of thermophilic Archaea. These viruses have been discovered by screening enrichment cultures and novel isolates from environmental samples for their ability to form halos of growth inhibition, or by using electron microscopy to screen enrichment cultures for virus-like particles. Direct isolation without enrichment has not yet been successful for viruses of extreme thermophiles. On the other hand, most viruses of extreme halophiles, the …

Mitochondrial Physiology Of Diapausing And Developing Embryos Of The Annual Killifish Austrofundulus Limnaeus: Implications For Extreme Anoxia Tolerance, Jeffrey M. Duerr, Jason E. Podrabsky

Biology Faculty Publications and Presentations

Diapausing embryos of the annual killifish Austrofundulus limnaeus have the highest reported anoxia tolerance of any vertebrate and previous studies indicate modified mitochondrial physiology likely supports anoxic metabolism. Functional mitochondria isolated from diapausing and developing embryos of the annual killifish exhibited VO2, respiratory control ratios (RCR), and P:O ratios consistent with those obtained from other ectothermic vertebrate species. Reduced oxygen consumption associated with dormancy in whole animal respiration rates are correlated with maximal respiration rates of mitochondria isolated from diapausing versus developing embryos. P:O ratios for developing embryos were similar to those obtained from adult liver, but were diminished in …

Dielectrophoretic Choking Phenomenon In A Converging-Diverging Microchannel, Ye Ai, Shizhi Qian, Sheng Liu, Sang W. Joo

Mechanical & Aerospace Engineering Faculty Publications

Experiments show that particles smaller than the throat size of converging-diverging microchannels can sometimes be trapped near the throat. This critical phenomenon is associated with the negative dc dielectrophoresis arising from nonuniform electric fields in the microchannels. A finite-element model, accounting for the particle-fluid-electric field interactions, is employed to investigate the conditions for this dielectrophoretic (DEP) choking in a converging-diverging microchannel for the first time. It is shown quantitatively that the DEP choking occurs for high nonuniformity of electric fields, high ratio of particle size to throat size, and high ratio of particle's zeta potential to that of microchannel. © …

Development Of New Functional Food Applications Of Edible Irish Seaweed, Sabrina Cox

Conference papers

No abstract provided.

Synthesis And Evaluation Of Azetidinone Analogues Of Combretastatin A-4 As Tubulin Targeting Agents, Niamh O'Boyle, Miriam Carr, Lisa M. Greene, Orla Bergin, Seema M. Nathwani, Thomas Mccabe, David G. Lloyd, Daniela M. Zisterer, Mary J. Meegan

Articles

The synthesis and antiproliferative activity of a new series of rigid analogues of combretastatin A-4 are described which contain the 1,4-diaryl-2-azetidinone (β-lactam) ring system in place of the usual ethylene bridge present in the natural combretastatin stilbene products. These novel compounds are also substituted at position 3 of the β-lactam ring with an aryl ring. A number of analogues showed potent nanomolar activity in human MCF-7 and MDA-MB-231 breast cancer cell lines, displayed in vitro inhibition of tubulin polymerization and did not cause significant cytotoxicity in normal murine breast epithelial cells. 4-(4-Methoxyaryl)-substituted compound 32, 4-(3-hydroxy-4-methoxyaryl)-substituted compounds 35 and 41 and …

Experiences And Perceptions Of How Community-Based Interventions Can Promote Young Adults' Resilience To Suicide Within Rural/Regional Communities, Tracy Evans

Theses : Honours

In the literature, both statistics and studies have noted that suicide in rural/regional young adults' is an important concern. Recent research suggests, that to facilitate a primary approach to suicide prevention in young people, there is a need to promote the protective construct of resilience at a community level, highlighting strategies such as connectedness, and decreasing the stigma related to mental illness and health-seeking behaviour (Commonwealth Department of Health & Aged Care, 2005; Injury Control Council of Western Australia, 2006). However, there is a need to investigate and identify the links or mediating factors that promote individual resilience within a …

Resilience In Families With Same-Sex Parents, Natasha Griffiths

Theses : Honours

Research suggests resilience can be viewed as a dynamic process facilitating positive functioning within the context of significant adversity. A nuclear family type that remains a controversial and stigmatized group is families with same-sex parents. Same-sex families face a great number of challenges, due to the presence of heterosexism in society and they are often heavily criticised within the broad public domain. The current study adopted a phenomenological methodology to identify the family resilience processes utilised by same-sex families. Five lesbian couples (n = 10) raising children in Perth, Western Australia were interviewed. A thematic analysis technique outlined by Glesne …

From Junior To Senior Sport: Do Athletes Differ In Their Transitional Experiences?, Glen Ewen

Theses : Honours

The purpose of this research was to investigate whether athletes at the beginning (BTG) of their transition from junior to senior sport, had different transitional experiences to those in the middle (MTG). One hundred and forty eight male and female elite athletes aged between 14 and 18 years, from a variety of sports in both city and country locations of Western Australia, were surveyed. Two test instruments were used; the newly developed Swedish, Transitional Monitoring Survey (TMS), and the Athletic Identity Measurement Scales (AIMS). Univariate descriptive statistics, One Way Analysis of Variance (ANOVA), and reliability measures were used to analyse …

Writing In Light: Giving Silences Their Say In Janette Turner Hospital's "The Last Magician", Niva Kaspi

Theses : Honours

The last magician (1992) by Janette Turner Hospital tells the story of Lucy, the novel's narrator, who is trying to piece together the mystery disappearance and possible murder of three people. Gabriel, Lucy's boyfriend, and Charlie Chang, a photographer, have gone missing while searching for Cat, Charlie's childhood friend. The story shifts between present time Sydney and a tragedy that took place a generation earlier in rural Queensland, involving the death of Cat's younger brother, Willy. The novel draws on conventions of the mystery genre, so that readers desire to know what has happened to several missing characters, even as …

Fear Of Terrorism: Legislation And Perceived Loss Of Civil Liberties, Finola Richardson

Theses : Honours

Terrorism is a fear-inducing element of the current Australian political agenda. There are concerns about counter-terrorism legislation employed in Australian since the September 11th attacks on the United States, (9/11) and the effects these laws have on the civil liberties of Australian citizens. The literature presents two views one identifies the low risk of terrorism in Australia as no justification for strict new legislation. An alternative claim is increased security following 9/11 is essential in ensuring Australia is not viewed as a 'soft target'. The psychological experience of fear following terrorist attacks can influence the public's response to Government initiatives …

Autonomy Support In Australian Higher Education: A Review Of Contextual And Situational Applications Of Self-Determination Theory, Nicolas Connault

Theses : Honours

Self-Determination Theory (SDT, Deci & Ryan, 2000) is a macro-theory of motivation that has received much support from empirical research in the last twenty years. One of its main tenets is that the satisfaction of three basic psychological needs-autonomy, competence and relatedness-is universally required for the attainment of optimal psychological well-being, health, growth and self-determined behaviour. Higher education in Australia, through its outcomes-based approach to academic success, is not typically designed to promote student autonomy. Self-Determination Theory posits that promoting students' autonomy should lead to better quality of learning, higher intrinsic motivation to study, lower attrition and enhanced subjective well-being. …