Digital Commons Network^™

Gender, Spatial Learning Trials, And Object Recall., Tifani R. Hite

Electronic Theses and Dissertations

Previous researchers have reported women doing better than men in object recall. The current study tested for gender differences in object recall over three memorization trials using gender neutral stimuli. Fifty men and 53 women viewed pictures of 60 objects (15 in each of four quadrants) for one minute, and then had three minutes to recall as many objects and locations as they could. This procedure was followed over three trials. Women performed better than men, and the difference increased across trials. Training was successful as participants recalled significantly more objects and locations on trial 3 than on trial 1. …

Placing Monitoring Devices In Electric Power Networks Modeled By Block Graphs., David Wayne Atkins

Electronic Theses and Dissertations

The problem of monitoring an electric power system by placing as few measurement devices in the system as possible is closely related to the well known vertex covering and dominating set problems in graph theory. A set S of vertices is defined to be a power dominating set of a graphs if every vertex and every edge in the system is monitored by the set S (following a set of rules for power system monitoring). The minimum cardinality of a power dominating set of a graph is its power domination number. In this thesis, we investigate the power domination number …

Spectroscopic Examination Of The Catalytic Decomposition Of Hydrogen Peroxide By A Copper (Ii) Complex Of A Dissymmetric Schiff Base And An Imidazole Derivative., John D. Davis Jr.

Electronic Theses and Dissertations

Previous studies involving copper (II) complexed with a dissymmetric Schiff base and imidazole derivatives had identified catalase activity of these complexes towards H₂O₂. Reactions such as this are of great interest due to the important role of copper-based complexes in biological systems. Our research has been conducted to add to the base of knowledge regarding the efforts of other researchers to investigate copper complexes that exhibit similar reactivity as copper-based proteins towards dioxygen. The copper complex chosen for this study contained a tri-dentate Schiff base adduct which, when complexed with an imidazole derivative, limited the manner …

One Bug, Two Drugs : A Mathematical Model Of Resistance Dynamics In The Icu., Susan L. Calcote White 1971-

Electronic Theses and Dissertations

Antibiotic resistance is a problem causing growing concern in the medical community, leading some to speculate that a return to the preantibiotic era is imminent. The problem of antibiotic resistance is particularly significant in the intensive care unit (ICU), due to the weakened immune responses of the patients and quantity of antibiotics administered. One theory proposes that the policy of cycling, or rotating, the antibiotics used in the ICU may minimize the development of resistance. Few clinical trials investigating the effects of cycling have been conducted, and many questions concerning the impact of cycling policies are unanswered at this point. …

Cloning And Sequencing Of Glucosyltransferase (Gt) Genes From Grapefruit (Citrus Paradisi) Seedlings, Searching For 7-O-Gt., Mebrahtu Berhane Sibhatu

Electronic Theses and Dissertations

Flavonoids play crucial roles in plant life cycles and in human welfare. Grapefruit plants produce several glycosylated flavonoids and the glycosylation reactions are catalyzed by UDP-glucose: glucosyltransferases (GTs). Our objective was to use the SMART RACE RT-PCR strategy to obtain cDNA sequences of putative grapefruit flavonoid GTs. Gene specific primers were designed from the plant secondary product glucosyltransferase (PSPG) box and used to amplify 5’GT clones. Clone-specific primers were designed from 5’clones to amplify 3’ GT clones. We obtained 5 5’ clones and 1 3’ clone as candidate GTs. We used 3 of these clones to predict 2 compiled GT …

Nutrient Stoichiometry In Algal Responses To Multiple Stressors In Experimental Agricultural Wetlands, William Robert White

Electronic Theses and Dissertations

This study was part of an EPA-funded experimental investigation of multiple stressor effects on agricultural wetlands. A 27-1 center point enhanced fractional factorial design was applied to 72 wetland mesocosms to examine 7 main effects and 21 two-way interaction effects (Montgomery 1997). Treatments included the agrichemicals monosodium methane arsenate (MSMA), chlorpyrifos and atrazine, inorganic nutrients (nitrogen, phosphorus, and silicon), the fathead minnow, suspended sediments (kaolinite), and UV radiation. Dissolved, suspended (sestonic), and periphyton C, N, and P, along with C:P, C:N, and N:P in each fraction were measured 2, 12, 24 and 48 days after treatments were added to the …

A Re-Evaluation Of The Us Epa Radon Risk Categorization For Unicoi County, Tennessee., William Grant Parsons

Electronic Theses and Dissertations

Effective risk communication is based on appropriate risk characterization. A reevaluation of the 1987 US EPA radon risk categorization of Unicoi County Tennessee was conducted using in-home radon concentrations, determined in a long-term monitoring study. Radon concentrations were measured in 69 homes using Electret Passive Environmental Radon Monitors (E-PERM’s), following standard methods. Radon concentrations determined in this study (avg. 4.03 ± 3.04) were significantly higher than those measured in the USEPA study (avg. 1.96 ± 1.08). Using this study’s data, the risk categorization was recalculated with the US EPA Radon Index Matrix Model. The model re-categorized Unicoi County from a …

Faculty Adoption Of Computer Technology For Instruction In The North Carolina Community College System., Karen Hill Less

Electronic Theses and Dissertations

Computer technology has become an integral part of instruction at the elementary, secondary, and postsecondary levels. Some instructors have enthusiastically adopted technological innovations in their classrooms, often expending their own funds for hardware and software, while others have resisted the trend, citing a myriad of reasons for not including computer technology. Significant research on the adoption of innovations has been undertaken by Everett M. Rogers, who identified individuals on a continuum from Innovator to Laggard. Rogers’ research was used as a basis to classify full-time faculty teaching in degree programs in the North Carolina Community College System and to compare …

Host Defense Mechanisms In The Crayfish: The Effect Of Injection With Live Or Killed Bacteria., Kimberly R. Goins

Electronic Theses and Dissertations

An increase in attachment of SRBCs to Procambarus clarkii hemocytes has been shown after the crayfish were injected with a live or killed Pseudomonas strain RS2b. The increase in attachment occurred at 8 hours post injection and peaked at 24 hours for both experimental groups. The population of hemocytes with receptors for LPS and mannose also increased at 8 hours post injection and peaked at 24 hours for both experimental groups. At 96 hours post injection the number of receptor bearing hemocytes and hemocytes bound to SRBCs began to decrease to the level of the control for both groups. The …

Collaboration Between Art Teachers And School Counselors Of The Johnson City Elementary Schools To Assist At-Risk Students: An Art Experiences Model., Caroline Dover Jackson

Electronic Theses and Dissertations

Art has been used for centuries as a healing tool for adults and children; however, the use of art therapy in schools is a recent development. Art therapy, encompassing art, psychology, and therapy, is by nature interdisciplinary. Art experiences provided to students at risk of failing or dropping out of school may offer non-verbal communication that can be used effectively to satisfy a variety of developmental, social, or emotional needs. The purpose of this qualitative study was to develop a curriculum-based art experiences model, combining the skills of art teachers and school counselors. Data were collected through a focus group …

Perceptions Of Seventh- And Eighth-Grade Girls Toward Coeducational Physical Education Classes In Five Middle Schools In East Tennessee., Shannon Clabo Sullivan

Electronic Theses and Dissertations

The purpose of this study was to examine the participation, perceptions, and preferences of seventh- and eighth-grade girls in coeducational and gender-separated physical education classes in five schools in East Tennessee. The participants in this study were seventh- and eighth-grade girls attending public schools in two East Tennessee counties. Participants completed a questionnaire pertaining to their physical education classes. Although 465 students were invited to participate in this study, only 241 students returned the permission form. This resulted in a 50% response rate. The findings were descriptive in nature, although basic analyses were calculated to identify any relationships among the …

Parameter Estimation For A Modified Cable Model Using A Green's Function And Eigenvalue Perturbation., Scott Lewis La Voie

Electronic Theses and Dissertations

In this thesis we developed the Green's Function for a tapered equivalent cylinder model of dendritic electrical propagation. We then use the Green's Function to develop a Carleman linear embedding scheme which is used to estimate the effects of a nonlinear ion channel hot-spot on the tapered cylinder solution. Mathematica^© was used to implement the Carleman embedding scheme.

Some People Call Them Dolls: Capturing The Iconic Power Of The Female Form In Non-Ferrous Metals., Alison Greer Pack

Electronic Theses and Dissertations

The artist discusses her Master of Fine Arts exhibition at East Tennessee State University, Slocumb Galleries, Johnson City, Tennessee, October 28-November 8, 2002. Her exhibition was a personal narrative of her southern upbringing in small town Appalachia as well as a reflection of her inner thoughts and feelings towards feminism, adolescence, sexuality and Barbie. She chose to reference the female form, void of an actual body, implied through clothing. Works are figurative and sculptural and are constructed of copper, sterling and fine silver. They are sculptural hollow vessels, raised, formed, and colored with gesso and prismacolor pencils.

Topics discussed: the …

Fire, Soil, Native Species And Control Of Phalaris Arundinacea In A Wetland Recovery Project., Richard Douglas Foster

Electronic Theses and Dissertations

Southern Appalachian Phalaris arundinacea control was investigated by: 1) correlating cover and species richness with soil characteristics across transects; 2) burning and herbicide use to determine conditions facilitating native plant establishment; and 3) hemi-parasitic Pedicularis lanceolata tested as a biological control.

Phalaris cover was correlated with subsoil consolidation; areas without Phalaris had consolidated subsoil while Phalaris at >50% cover established on loose soil. Phalaris cover inhibited species richness (r²=0.78). No soil characteristic predicted species richness.

Herbicide reduced Phalaris cover and aerial biomass by 23% and 63% respectively, compared to controls. Burning was ineffective. Two summers after herbicide Phalaris …

Protection Of Pifithrin-Α And Melatonin Against Doxorubicin-Induced Cardiotoxicity., Xuwan Liu

Electronic Theses and Dissertations

The current studies were designed to explore the protective effects of pifithrin-α and melatonin against doxorubicin-induced cardiotoxicity. Doxorubicin was injected at a dose of 22.5 mg/kg (i.p.) in mice to induce cardiotoxic effects. Meanwhile, doxorubicin caused a significant increase of cardiac cell apoptosis following injection (14.2 ± 1.1% for doxorubicin-5 d vs. 1.8 ± 0.12% for control, P < 0.01). Ribonuclease protection assays and Western blot analyses revealed that doxorubicin upregulated the p53-dependent genes Bax, BclxL, and MDM2 at least 2-fold. p53 was phosphorylated at Ser 15 in mouse hearts 1 h following doxorubicin injection, and p38 and ERK1/2 MAPKs mediated the phosphorylation of p53. In addition, caspases-3 and -9 were activated 24 h after doxorubicin injection. A p53 inhibitor, pifithrin-α, inhibited doxorubicin-induced apoptosis when administered at a dose of 2.2 mg/kg. Pifithrin-α abolished p53 transactivation activity, but did not influence doxorubicin-induced phosphorylation at Ser 15. By effectively inhibiting the expression of p53-dependent genes, pifithrin-α blocked doxorubicin-induced activation of caspases-3 and -9, thereby preventing cardiac apoptosis. In addition, pifithrin-α attenuated doxorubicin-induced structural and functional damages, without diminishing its anti-tumor efficacy on p53-null PC-3 cancer cells. The protective effects of melatonin and its metabolite 6-hydroxymelatonin on doxorubicin-induced cardiac dysfunction were evaluated in an isolated perfused mouse hearts and in vivo doxorubicin-treated mice. While perfusion of mouse hearts with 5 μM doxorubicin for 60 min resulted in a 50% suppression of HRxLVDP and a 50% reduction of coronary flow, pre-exposure of hearts to 1 μM melatonin or 6-hydroxymelatonin eased the cardiac …

The Role Of Celebration In Building Classroom-Learning Communities., Virginia Farr

Electronic Theses and Dissertations

Today, teachers are expected to play a major role in the socialization of their students. Crafting strong classroom communities that incorporate celebration is one technique some teachers have developed to enhance a sense of belonging in their classroom.

The purpose of this study was to determine the perceptions of teachers regarding what the practice of celebration accomplishes for the teacher, student, and class in reference to building and maintaining a classroom learning community. This study also examined approaches that teachers found to be the most successful in creating celebrations.

A multiple-site study design was used to gather qualitative data at …

Cloning And Expression Of Dazl In Rana Pipiens, Jamie Boorech

Electronic Theses and Dissertations

The DAZ gene on the human Y chromosome has been implicated in male fertility. Humans and other animals possess an autosomal version of this gene, referred to as DAZ-like or Dazl, which functions in gametogenesis and fertility. In order to expand our knowledge of Dazl, I cloned Dazl from the northern leopard frog Rana pipiens. To obtain the clone, I screened a R. pipiens ovary cDNA library with a RpDazl-specific PCR-generated radioactive probe. RpDazl, as determined by sequencing, is 3.5kb in length, with an 843 nucleotide open reading frame (ORF) and a 3' untranslated region (UTR) of 2635 nucleotides. At …

Transformation Of Arsenic Oxyanions In Bacterial And Model Systems, Ganna Polshyna

Electronic Theses and Dissertations

The HPLC-UV-Vis method with 7.5 mM sulfuric acid as a mobile phase and 195 nm wavelength detection was used for the separation and quantification of As(III) and As(V) in bacterial media used for growing of Clostridium sp. Strain OhILAs bacteria. In this method, the arsenic species were eluted in order As(V) > As(III), and the retention time were not affected by bacteria media matrix. It has been shown that the shape of the curve of increasing of the As(III) concentration is similar to that of bacteria growing. The main disadvantage of the present method is its failure to separate As(III) ions …

Using Pc12 Cells And Rat Cortical Neurons To Evaluate Poly(Caprolactone) And Collagenous Microcarriers For Applications In Nerve Guide Fabrication, Rebecca Waddell

Electronic Theses and Dissertations

Tissue-engineered nerve guides can provide mechanical support as well as biochemical stimulation for nerve regeneration. PC12 cells and rat cortical neurons were used to test poly(caprolactone) (PCL), collagenous microcarriers (CultiSphers), and a novel composite of the two materials as an initial step in the fabrication of multi-channeled nerve guides. PC12 cells were found to attach, proliferate and differentiate on laminin-coated PCL and on CultiSphers. When the initial concentration of PC12 cells was increased, the percentage of CultiSphers with cells attached increased as well. Changing the cell culture conditions from static to dynamic, however, had the opposite effect on cell attachment. …

Oxonitriles: Cyclizations In Total Synthesis, Pravin Iyer

Electronic Theses and Dissertations

Oxonitriles are versatile synthetic intermediates. The thesis provides a survey of the synthesis and reactions of cyclic oxonitriles followed by an approach to Kuehneromycin A that features oxonitrile chemistry. The discussion presents a synthetic route to the sesquiterpenoid, Kuehneromycin A, using oxonitrile-based methodology. A key feature is a new oxidative cyclization reaction that has been developed as a method for assembling functionalized trans-decalins. The mechanism of this reaction is presented to explain the excellent stereoselectivity. Similarly, a mechanistic analysis of a novel isomerization of quarternary centers is presented in detail.

Factors Effecting Uptake And Visualization Of Superparamagnetic Iron Oxide Particles By Macrophages: Relevance For Use In Mri Plaque Imaging, Walter John Rogers

Electronic Theses and Dissertations

Cardiovascular disease kills nearly 1 million Americans each year. While treatment at all levels has made significant advances over the past 3 decades, diagnosis is still limited to structural or hemodynamic changes associated with advanced disease. More than 60% of myocardial infarctions (MI) result from the rupture and associated acute thrombosis of atherosclerotic plaque that reduce lumen size by less that 50%. Ultra small superparamagnetic iron oxide particles (USPIO) have recently been proposed as a macrophage targeted magnetic resonance contrast agent. The goal of the present study was to determine if, and the extent to which, molecules known to alter …

Health Practices Of Homeless Women, Margaret Chaney Wilson

Electronic Theses and Dissertations

Homeless women and female-headed families represent the fastest growing subgroups of homeless individuals. To expand the body of knowledge and provide further insight into the complex area of homelessness and health, health practices of homeless women were investigated using a cross-sectional, descriptive, and non-experimental design using Pender's Health Promotion Model as the theoretical framework. Homeless women (N=137) were recruited from five shelters in northeastern Indiana. Homeless women in this study were found to be highly educated, mostly unemployed, and primarily single. A greater number of African Americans than represented in the local population were found to be shelter residents. Health …

Natural Products As Inhibitors Of Hypoxia Inducible Factor-1 (Hif-1), Tyler W. Hodges

Electronic Theses and Dissertations

No abstract provided.

Southern Collegiate Rugby : Examining A Masculine Space / By William Kyle Rote, Kyle Rote

Electronic Theses and Dissertations

No abstract provided.

Kin Recognition In Captive Wild Turkeys (Meleagris Gallopavo) / By Leigh Ben Truong, Leigh Ben Truong

Electronic Theses and Dissertations

No abstract provided.

Stochastic Modeling Of Nonlinear Epidemiology, Sankar Bokka

Electronic Theses and Dissertations

No abstract provided.

Pheromonal Mediation Of Sex Change In The Bridled Goby, Coryphopterus Glaucofraenum, A Protogynously Hermaphroditic Reef Fish, Kristen Erica Marsh

Electronic Theses and Dissertations

No abstract provided.

The Development Of Criteria For The Selection Of Wetland Restoration Sites In The Yazoo Backwater Area, Mississippi, Angela A. Davis

Electronic Theses and Dissertations

No abstract provided.

Quality Control In Microarrays / By Neelima Rungta, Neelima Rungta

Electronic Theses and Dissertations

No abstract provided.

Phytochemical And Biological Investigation Of Zanthoxylum Monophyllum (Lam) P. Wilson (Rutaceae), Laura C. Johansmann

Electronic Theses and Dissertations

No abstract provided.