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Articles 4921 - 4950 of 7363
Full-Text Articles in Entire DC Network
Serum Anti-Phosphorylcholine And Anti-Cardiolipin Concentrations Following Periodontal Scaling And Root Planing, Reve W. Chaston
Serum Anti-Phosphorylcholine And Anti-Cardiolipin Concentrations Following Periodontal Scaling And Root Planing, Reve W. Chaston
Theses and Dissertations
Atherosclerosis is an insidious disease with serious morbidity and mortality including ischemic heart disease, stroke, and myocardial infarction. This condition is progressive and can start early in life eventually leading to large plaques and arterial occlusion. Two key components of this process are the immune system and lipids; in particular, LDL which accumulates within the arterial walls and macrophages which recognize and engulf oxidized-LDL (oxLDL) to form foam cells. Knowing that certain antibodies directed against bacterial antigens such as phosphorylcholine (PC) and cardiolipin (CL) show opsonizing cross-reactivity with oxLDL it can be proposed that there is a link between immune …
Phylogeography Of Marine Meiofaunal Nemerteans Of The Ototyphlonemertes Fila Species Complex, Alexander Tulchinsky
Phylogeography Of Marine Meiofaunal Nemerteans Of The Ototyphlonemertes Fila Species Complex, Alexander Tulchinsky
Theses and Dissertations
Morphological conservatism combined with intraspecific variability has obstructed studies of speciation and species boundaries among marine meiofauna. Ototyphlonemertes is a genus of meiofaunal nemerteans inhabiting the interstitial spaces of marine sediments. Its members lack pelagic larvae and dispersal potential is believed to be poor. A phylogeographic study of Ototyphlonemertes fila is presented using mitochondrial (cox3) and nuclear (ISSR) molecular markers. Deep genetic divergence (approximately 18% in cox3) was observed between sympatric mitochondrial lineages in Florida. This divergence was reflected in the nuclear marker as well, suggesting the presence of two cryptic species. The first contains Florida and New England populations …
Natural Selection, Jeffrey A. Vick
Natural Selection, Jeffrey A. Vick
Theses and Dissertations
My thesis work is about imagination. I use the collaborative efforts of the viewer's mind and my sculptures, or specimens, to make associations of real life animals. I feel this engages the viewer and in turn invites them to inspect the work on closer level. This is my ultimate goal in the work, to take hold of the viewer's curiosity and have them examine the work on a closer level.
Scaffold Permeability As A Means To Determine Fiber Diameter And Pore Size Of Electrospun Fibrinogen, Scott Allen Sell
Scaffold Permeability As A Means To Determine Fiber Diameter And Pore Size Of Electrospun Fibrinogen, Scott Allen Sell
Theses and Dissertations
The purpose of this study was to construct a flowmeter that could accurately measure the hydraulic permeability of electrospun fibrinogen scaffolds, providing insight into the transport properties of electrospun scaffolds while making the measurement of their topographical features (fiber and pore size) more accurate. Three different concentrations of fibrinogen were used (100, 120, and 150mg/ml) to create scaffolds with three different fiber diameters and pore sizes. The fiber diameters and pore sizes of the electrospun scaffolds were analyzed through scanning electron microscopy and image analysis software. The permeability of each scaffold was measured and used to calculate permeability-based fiber diameters …
Acquisition And Retention Of Bacterial Spores (Bacillus Atrophaeus) By Eight Insect Species, Kieron Marie Torres
Acquisition And Retention Of Bacterial Spores (Bacillus Atrophaeus) By Eight Insect Species, Kieron Marie Torres
Theses and Dissertations
Acquisition and retention of spores of an anthrax surrogate, Bacillus atrophaeus Nakamura ("BG") were evaluated in eight insect species. Species included: house cricket (Acheta domesticus L.), German cockroach (Blatella germanica L.), common house fly (Musca domestics L.), blue bottle fly (Calliphora vomitoria L.), hairy rove beetle Creophilus maxillosus L.), yellow mealworm (Tenebrio molitor L.), common paper wasps (Polistes exclamans exclamans Viereck), red paper wasps (Polistes Carolina L.), red harvester ant (Pogonymyrmex barbatus Smith). Individual insects were offered BG-treated food and sacrificed at specified time intervals following one, two or three meals. Resulting samples were surface-washed five consecutive times then homogenized …
Is Safe Haven Legislation An Efficacious Policy Response To Infant Abandonment: A Biopsychosocial Profile Of The Target Population, Stephanie Mayes Gruss
Is Safe Haven Legislation An Efficacious Policy Response To Infant Abandonment: A Biopsychosocial Profile Of The Target Population, Stephanie Mayes Gruss
Theses and Dissertations
This study represents an attempt to describe the extent and features of safe haven legislation in the United States, discuss implementation issues, and to examine if the legislation is reaching its intended target audience in order to answer the question, "Is safe haven legislation an efficacious response to infant abandonment?" Safe havens are designated locations where infants can be anonymously abandoned without fear of prosecution or incarceration. As of May of 2006, forty-seven states have passed such legislation, citing the need for an alternative to unsafe infant abandonment leading to an infant's death, and an alternative to infanticide (the killing …
The Post-9/11 Federal Homeland Security Paradigm And The Adoptive Capacity Of Public Administration Theory And Practice, Chaya Rani Jain
The Post-9/11 Federal Homeland Security Paradigm And The Adoptive Capacity Of Public Administration Theory And Practice, Chaya Rani Jain
Theses and Dissertations
The September 11, 2001 terrorist attacks redefined the federal approach to disaster planning. Prior to 9/11, disaster and emergency management meant preparedness for and response to natural and man-made emergencies such as floods, hurricanes, fires, and civil discord. The post-9/11 paradigm shift, a multi-pronged approach called "homeland security" strategy, now incorporates a multitude of man- and nature-made disasters to include border and transportation security; emergency preparedness, response and recovery against chemical, biological, radiological and nuclear threats; as well as information analysis and infrastructure protection. These new priorities were communicated to the state and local governments. The purpose of this descriptive, …
Quantifying The Effects Of Correlated Covariates On Variable Importance Estimates From Random Forests, Ryan Vincent Kimes
Quantifying The Effects Of Correlated Covariates On Variable Importance Estimates From Random Forests, Ryan Vincent Kimes
Theses and Dissertations
Recent advances in computing technology have lead to the development of algorithmic modeling techniques. These methods can be used to analyze data which are difficult to analyze using traditional statistical models. This study examined the effectiveness of variable importance estimates from the random forest algorithm in identifying the true predictor among a large number of candidate predictors. A simulation study was conducted using twenty different levels of association among the independent variables and seven different levels of association between the true predictor and the response. We conclude that the random forest method is an effective classification tool when the goals …
Stretch-Dependant Tonic Force Maintenance In Rabbit Epigastric Artery, Krystina Michelle Berg
Stretch-Dependant Tonic Force Maintenance In Rabbit Epigastric Artery, Krystina Michelle Berg
Theses and Dissertations
The contractile state of vascular smooth muscle (VSM) plays a key role in blood pressure regulation. Abnormal VSM contractility characterizes hypertension and understanding the regulatory mechanisms of VSM may provide some insights to specific treatment of hypertension. Upon muscle stimulation, Ca2+, myosin light chain (MLC) phosphorylation, crossbridge cycling rates and force increase to high levels, but with time, force is maintained while all other parameters of muscle activation fall to low levels. Thus, contraction is divided temporally into early (phasic) and late (tonic) phases, as determined by the underlying regulatory mechanism. Muscles with more phasic characteristics have a higher peak …
Inhibition Of Margination And Diapedesis Of Neutrophils By Protein Synthesis Blockade, Phyllis V. Acquah
Inhibition Of Margination And Diapedesis Of Neutrophils By Protein Synthesis Blockade, Phyllis V. Acquah
Theses and Dissertations
Acute Respiratory Distress Syndrome (ARDS), an age-old clinical problem facing the Emergency Department and Intensive Care Units of all health systems, is a common debilitating lung condition consequent upon severe systemic inflammation. Although several studies have gone into understanding the epidemiology and pathogenesis of the disease thus making way for new advances in treatment strategies, there seems to be no known study tailored to its prevention. Neutrophil extravasation within the tissues during inflammation is the hallmark of this syndrome. Our study sought to block excessive neutrophil infiltration by inhibiting the biosynthesis of some essential proteins necessary for the process. In …
Use Of A Synthetic Substrate For Orthodontic Bond Strength Testing, Elijah B. Saikaly
Use Of A Synthetic Substrate For Orthodontic Bond Strength Testing, Elijah B. Saikaly
Theses and Dissertations
In vitro bond strength studies are of great importance and interest since they allow the prediction of clinical success of orthodontic adhesives. There are many studies that have investigated bond strength values of bonding systems. However, due to the variation in the materials and methods employed, it is very difficult and often impossible to make comparisons among data. The use of a substrate as an alternate to enamel for mechanical tests would minimize these variables and reduce the challenges faced with in vitro bond strength tests. The purpose of this study was to investigate the suitability of Macor as a …
Calcium/Calmodulin Dependent Protein Kinase Type-Ii Associates With Flightless-I To Influence Its Nuclear Localization, Matthew Edward Seward
Calcium/Calmodulin Dependent Protein Kinase Type-Ii Associates With Flightless-I To Influence Its Nuclear Localization, Matthew Edward Seward
Theses and Dissertations
Ca2+/calmodulin-dependent protein kinase type-II (CaMK-II) is a Ser/Thr protein kinase regulated by Ca2+ and Calmodulin. It is a highly conserved and broadly expressed enzyme and has a unique structure and dynamic regulation. It has the ability to remain active in the absence of Ca 2+ as a result of Ca2+ dependent autophosphorylation. CaMK-II phospliorylates proteins involved in neurotransmitter secretion, long term potentiation, cytoskeletal dynamics, gene transcription, and cell motility. To support existing and identify new intracellular roles of CaMK-II, potential binding partners were identified. This was accomplished by transfecting and purifying "FLAG-tagged" CaMK-II's (α, βE, δC, and δE). CaMK-II associated …
Novel Characteristics Of Murine Bone Marrow-Derived Macrophages And Human Macrophage-Like Cells, George Tharwat Georges
Novel Characteristics Of Murine Bone Marrow-Derived Macrophages And Human Macrophage-Like Cells, George Tharwat Georges
Theses and Dissertations
These studies provide evidence for novel properties of macrophages derived from bone marrow stem cells. In study 1, treatment of activated mouse bone marrow-derived macrophages (BMM) with either catecholamine synthesis inhibitors (α-methyl-para-tyrosine and fusaric acid) or the β2 adrenergic receptor antagonist ICI 118,551 demonstrated that BMM produce catecholamines. The catecholamines modulated macrophage cytokine production through autocrine actions on adrenergic receptors. In study II, undifferentiated human bone marrow cells were incubated in 30% mouse L929 fibroblast conditioned medium and generated adherent cells within three days. The cells were clearly identifiable as macrophages based on surface proteins and phagocytic activity but produced …
Determination Of The Band Gap Bowing Parameter Of A1xga1-Xn With Contactless Electroreflectance, Laura C. Mcglinchey
Determination Of The Band Gap Bowing Parameter Of A1xga1-Xn With Contactless Electroreflectance, Laura C. Mcglinchey
Theses and Dissertations
Contactless electroreflectance (CER), a modulation spectroscopy (MS) technique, has been used to study the A and C exciton transitions in A1xGa1-xN layers for a composition range of 0 ≤ x ≤ 0.48 at room temperature. Taking the entire composition range (0 ≤ x ≤ 1) into account by incorporating a previously reported band gap energy for AlN, the dependence of the A-exciton transition on composition showed a downward bowing from linearity. A bowing parameter of b = 1.7 eV was found. Analysis of the lower composition range 0 ≤ x ≤ 0.48 resulted in a linear fit, as did the …
The Expression And Function Of Wilms' Tumor 1 In Malignant Glioma, Aaron J. Clark
The Expression And Function Of Wilms' Tumor 1 In Malignant Glioma, Aaron J. Clark
Theses and Dissertations
The Wilms' tumor 1 gene is overexpressed in many types of cancer and is associated with poor prognosis and resistance to anti-cancer therapies. In vitro studies in non-glioma cells types have demonstrated that WTl plays a role in increased proliferation, resistance to apoptosis, and increased cellular invasion. We aimed to thoroughly characterize the expression pattern of Wilms' tumor 1 in human malignant glioma and discern its function in this complex disease process. We screened a large sample of established human malignant glioma cell lines and glioma tissue specimens of all grades for WT1 expression. The majority of cell lines and …
Accelerating Whole-Cell Biocatalysis By Enhancing Outer Membrane Permeability, Ye Ni
Accelerating Whole-Cell Biocatalysis By Enhancing Outer Membrane Permeability, Ye Ni
Theses and Dissertations
Whole-cell biocatalysts are preferred in many biocatalysis applications. However, cell envelope often represents a formidable permeability barrier. As a result, reactions catalyzed by whole-cells are reportedly orders of magnitude slower than those of by their free enzyme counterparts. The present research addresses this critical issue by using membrane engineering approaches. Two E. coli strains with genetically altered outer membrane structures were used in the study, a lipopolysaccarides (LPS) mutant SM101 and a Braun's lipoprotein mutant E609L. The effects of outer membrane mutation on the permeability of substrates differing substantially in size and hydrophobicity were investigated by combining the mutant cells …
Autocrine Effects Of Catecholamines On Macrophage Release Of Interleukin-6 (Il-6), Shaunta D. Poe
Autocrine Effects Of Catecholamines On Macrophage Release Of Interleukin-6 (Il-6), Shaunta D. Poe
Theses and Dissertations
Effects of norepinephrine (NE) on macrophage cytokine release are complex because the cells have both α2 and β2 adrenergic receptors, which mediate opposing actions. Furthermore, β2-adrenergic agonists are reported to have both stimulatory and inhibitory effects on interleukin-6 (IL-6). This study was designed to clarify the autocrine role of macrophage-derived NE on IL-6 production in activated peritoneal macrophages. Effects of NE on IL-6 production in the RAW264.7 macrophage cell-line also were investigated. Treatment of activated peritoneal macrophages with endotoxin, the α2-adrenergic antagonists yohimbine or RS79948 revealed that the α2-adrenergic receptor mediates a stimulatory autocrine action of catecholamines on IL-6 production. …
Jimmy Hit His First Home Run, Eileen N. Rafferty
Jimmy Hit His First Home Run, Eileen N. Rafferty
Theses and Dissertations
This document begins with the end of a life and ends with the beginning of hope. It is a brief description of the artist's history, artistic and literary influences, and subsequent works produced during graduate school, specifically Dichotomy, Swan Dive, and Jimmy Hit His First Home Run. Topics discussed include Human Physiology, Transference, Buddhism, and Bubbles. This document was created in Microsoft Word 2004 for Mac, Version 11.2.
Functional Consequences Of Matrix Metalloproteinase-1 Over-Expression In Human Gliomas, Emily Mullet
Functional Consequences Of Matrix Metalloproteinase-1 Over-Expression In Human Gliomas, Emily Mullet
Theses and Dissertations
Malignant brain tumors are among the deadliest of human cancers. Despit recent advancements in conventional therapies, glioblastomas remain incurable, largel y due to their ability to invade surrounding tissue. Matrix metalloproteinases are thought to contribute to the invaseive phenotype of human gliomas. Absent in normal brain, matrix metalloproteinase-1 (MMP-1) has been shown to be present in gliomas, and in particular in glioblastoma multiforme (GBM). To begin to examine the role of MMP-1 in these tumore, two human glioma cell lines were stably transfected with MMP-1 cDNA. Confirmation of MMP-1 over-expression in these cells was achieved through real-time PCR and Western …
The Effect Of Adding Drag-Reducing Polymers To Resuscitation Fluid During Hemorrhagic Shock On Skeletal Muscle Microcirculation, Geoffrey C. Alexander
The Effect Of Adding Drag-Reducing Polymers To Resuscitation Fluid During Hemorrhagic Shock On Skeletal Muscle Microcirculation, Geoffrey C. Alexander
Theses and Dissertations
Previous studies have shown an increase in survival when a minute amount of drag-reducing polymers were added to a resuscitation fluid. The purpose of this investigation was to examine the effect of adding a minute amount of the drag-reducing polymer polyethylene glycol to a resuscitation fluid, on the microcirculation of skeletal muscle during a volume-controlled hemorrhage model. The spinotrapezius muscle in twelve male Sprague Dawley rats was exteriorized for microvascular measurements of the arterioles. The diameters of the three levels of arterioles, interstitial fluid PO2, and RBC velocity in the feed arteriole were measured. Flow in the feed arteriole was …
The Ins And Outs Of School Provider Literature: A Multi-Year Content Analysis On Lgbt Youth, Caitlin Conor Ryan
The Ins And Outs Of School Provider Literature: A Multi-Year Content Analysis On Lgbt Youth, Caitlin Conor Ryan
Theses and Dissertations
This study is based on a content analysis of two primary sources: 1) literature published on lesbian, gay, bisexual and transgender (LGBT) youth in professional journals for school providers (school counselors, nurses, psychologists and social workers) over more than a 30-year period; and 2) materials developed for school providers on LGBT youth by states with laws, regulations and professional policies related to sexual orientation and/or gender identity in schools. Fifteen professional journals were identified that serve as primary and secondary journals for school providers. A total of 41 articles were published in these journals on LGBT youth between 1937 and …
Psychology And The Theatre: A Qualitative Experiment In Actor Training, Megan Rebecca Brown
Psychology And The Theatre: A Qualitative Experiment In Actor Training, Megan Rebecca Brown
Theses and Dissertations
Psychology and theatre have a remarkable amount in common. In using the basic concepts and theories of psychology, actors can develop more concrete, logical approaches to characters. This thesis is a summation of the course I developed, "Psychology and the Theatre," which was an attempt to teach students introductory psychology and then experiment with translating those concepts to character analysis and stage performance. Students were taught eight units of psychology: Sensation, Perception, and Memory; Learning; Motivation and Emotion; Development; Freud and Psychodynamic Approaches to Personality; Adlerian Individual Psychology; Love and Social Cognition; and Psychological Disorders. Students were given reading quizzes …
Novel Cancer Therapeutics, The Generation Of Ros, And Cell Survival, Clint Mitchell
Novel Cancer Therapeutics, The Generation Of Ros, And Cell Survival, Clint Mitchell
Theses and Dissertations
The impact of Ad.mda-7 on the survival of renal cell carcinoma lines (RCC), primary renal epithelial cells, glioblastoma multiforme lines (GBM), and primary rodent astrocytes is unknown. The present studies examine whether the GST fusion protein, GST-MDA-7, and the adenovirus, Ad.mda-7, altered the growth and survival of the A498 and UOK121N RCC lines or radiosensitized GBM, respectively. Due to previous findings that the RCC lines, but not primary renal epithelial cells, were resistant to type 5 adenoviral infection, we used purified GST-MDA-7 protein to show that GST-MDA-7, but not GST, caused a dose-dependent reduction in A498 and UOK121N proliferation but …
Degenerate Oligonucleotide Primed - Polymerase Chain Reaction Evaluation And Optimization To Improve Downstream Forensic Str Analysis Of Low Quality/Low Quantity Dna, Lindsay Paige Thompson
Degenerate Oligonucleotide Primed - Polymerase Chain Reaction Evaluation And Optimization To Improve Downstream Forensic Str Analysis Of Low Quality/Low Quantity Dna, Lindsay Paige Thompson
Theses and Dissertations
When forensic biological samples yield low quality/low quantity DNA, thecurrent STR analysis methods do not generate acceptable profiles. Whole genomeamplification can be used to pre-amplify the entire genome for downstream analyses. A commercially available kit for DOP-PCR, a form of WGA, is currently being used in the clinical for downstream single locus targets. Forensic analyses utilize a multiplex amplification. This study determined that the "home brew" created by our lab performs the same as the commercially available kit. Future optimization studies of DOP-PCR can utilize this "home brew". Additionally, this research determined that a 10 second increase in electrokinetic injection …
Sinking Poor Decision-Making With Best Practices: A Case Study Of Artificial Reef Decision-Making In The Florida Keys, Thomas Wayne Williams
Sinking Poor Decision-Making With Best Practices: A Case Study Of Artificial Reef Decision-Making In The Florida Keys, Thomas Wayne Williams
Theses and Dissertations
The natural reefs of the world are experiencing higher use and pressures, resulting in anthropogenic impacts that are deteriorating many coral stands and creating poor water quality. The Florida Keys rely primarily on the reef system that surrounds the archipelago for their socioeconomic health and successful future. The Florida Keys shares the symbiotic relationship of the terrestrial and marine realms with many other states and countries and the experience of higher demand on the resource. Artificial reefs could provide a substitute to the natural reefs for commercial and recreational users. An increased demand for derelict vessels of the U.S. Navy …
Assessment Of Section 404 Wetland Mitigation Compliance And No-Net-Loss In The United States Army Corps Of Engineers, Norfolk District, Kimberley Anne Baggett
Assessment Of Section 404 Wetland Mitigation Compliance And No-Net-Loss In The United States Army Corps Of Engineers, Norfolk District, Kimberley Anne Baggett
Theses and Dissertations
The United States Corps of Engineers is a federal agency responsible for regulating impacts to wetlands. Permit applications requesting authorization to impact wetlands are reviewed using a three step sequence: avoidance, minimization and compensatory mitigation. A national goal of no net loss of wetland acreage and function in compensatory mitigation has been recommended since 1987.Thirty Norfolk District projects requiring compensatory wetland mitigation in the permit years 1996-1998 were randomly selected for field review. The results showed that 10% of the project were never initiated or completed. Another 19% of the projects showed a net loss of acreage. However, many projects …
The Effect Of Media Advertising On Consumer Perception Of Orthodontic Treatment Quality, Daenya T. Edwards
The Effect Of Media Advertising On Consumer Perception Of Orthodontic Treatment Quality, Daenya T. Edwards
Theses and Dissertations
A survey instrument was designed to evaluate factors influencing consumer selection of an orthodontist and consumer perception of different forms of media advertising (radio, television, newspaper, magazine, direct mail, and billboard) by orthodontic practices. The surveys were distributed by 8 orthodontic offices in and around the Richmond, Virginia area. Out of 676 surveys, 655 (97%) were returned. Respondents most often cited dentist and patient referrals as how they learned of the orthodontic practices they visited (50%- 57%). However, a caring attitude and good practitioner reputation were cited as the top reasons influencing selection of an orthodontist (53% and 49% respectively). …
Evolving A Theatre Of Truth, Susan Hayes
Evolving A Theatre Of Truth, Susan Hayes
Theses and Dissertations
This thesis explores the challenges of evolving a Theatre of Truth in the context of the immediate zeitgeist. The questions I address are the role of feminist theatre in a world dominated by global media and corporate omnipotence; the conflation of theatre and Realpolitick; the limitations of postmodern thought and critical theory, and the struggle not only of the marginalized, but of all of us to create an activist theatre in perilous times. After examining my response to directing a production of Mud by Maria Irene Fornes, this project will also suggest that a theatre of specialized singular interests, such …
Cross-Modal Projections From Auditory To Visual Cortices In The Ferret, Meng Y. Wang
Cross-Modal Projections From Auditory To Visual Cortices In The Ferret, Meng Y. Wang
Theses and Dissertations
Recent studies have shown that neuronal connections occur between primary auditory and visual cortices of the primate (Falchier et al., 2002; Rockland and Ojima, 2003), and it has been suggested that these projections are involved in multisensory processing in these lower-level, core areas of cortex. The present study was conducted to determine if similar connections occur in other higher mammals such as carnivores (ferrets; Mustela putorius). Large injections of sensitive neuroanatomical tracer were placed within the core areas of auditory cortex in 3 ferrets. After transport and processing, labeled axon terminals were found not in primary visual cortex, but in …
Evaluation Of Prototype Cell Delivery Catheters Using Agarose Gel And Cell Culture Experiments, Sagar Panse
Evaluation Of Prototype Cell Delivery Catheters Using Agarose Gel And Cell Culture Experiments, Sagar Panse
Theses and Dissertations
Neurodegenerative diseases and brain tumors affect millions of patients worldwide and are associated with significant morbidity and mortality. The blood brain barrier constitutes a major obstacle to delivery of therapeutic agents administered systemically for treating these disorders. Intracranial drug delivery provides a novel way of bypassing the blood brain barrier and achieving high concentration of therapeutic agents in the brain while avoiding systemic side effects. However damage to tissues during insertion of catheters, release of air in the brain and consequent backtracking of dye are some disadvantages with this mode of treatment. We evaluated prototype cell delivery catheters (each with …