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Articles 3721 - 3750 of 5384
Full-Text Articles in Medicine and Health Sciences
Virginia Dental Journal (Vol. 83, No. 1, 2006)
Virginia Dental Journal (Vol. 83, No. 1, 2006)
Virginia Dental Journal
No abstract provided.
Dual Regulation Of Telomerase Activity By Hsf1 And Its Role In Prostate Cancer Progression, Keith Douglas Ostergaard Jensen
Dual Regulation Of Telomerase Activity By Hsf1 And Its Role In Prostate Cancer Progression, Keith Douglas Ostergaard Jensen
Theses and Dissertations
It has been shown that the key components of the hsp90 chaperone complex, including hsp90, p23, hsp70, hsp40, and HOP (p60), associate with telomerase; however, their specific roles in telomerase function and tumor progression have not yet been defined. HSF1, the primary mammalian heat shock protein transcription factor, may affect telomerase activity and transformation by regulating the expression of several hsp90 chaperone complex proteins in response to stress as well as regulating the transcription of hTERT, the protein subunit of telomerase.In our in vitro model of prostate cancer progression, as cells progress from immortal but non-tumorigenic (P69) to tumorigenic (M2182) …
Interspecies Pharmacokinetic Scaling And Metabolism Of Alcohols And Glycols, Pankaj Gupta
Interspecies Pharmacokinetic Scaling And Metabolism Of Alcohols And Glycols, Pankaj Gupta
Theses and Dissertations
Background: Despite the numerous pharmaceutical applications of alcohols andglycols, the interspecies differences with respect to their pharmacokinetics (PK) arepoorly understood. The aim of this research was to use in-vivo and in-vitro approaches to compare and model the PK characteristics across various species.Methods: Appropriate published in-vivo studies (in different species) foralcohols and glycols were carefully selected. PK analysis was performed using (a) noncompartmental analysis and (b) compartmental modeling to estimate relevant dose-independent PK parameters. Next, six alcohols (methanol, ethanol, 1 -propanol, 1 -butanol, 1-hexanol, and 1-octanol), two glycols (ethylene glycol and propylene glycol)and one secondary alcohol (2-propanol) were examined as in-vitro …
Use Of Quantitative Admissions Data To Predict Academic And Licensure Examination Performance Among Physical Therapist Students, Ralph Russell Utzman
Use Of Quantitative Admissions Data To Predict Academic And Licensure Examination Performance Among Physical Therapist Students, Ralph Russell Utzman
Theses and Dissertations
Professional physical therapist education programs use a variety of measures of academic performance, aptitude, and interpersonal skills when selecting students for admission. Grade point averages (GPA) and scores on standardized tests, such as the Graduate Record Examination (GRE), are commonly used quantitative measures. The purpose of this study was to investigate the utility of these measures in predicting which physical therapist students will encounter difficulty in the academic program or in passing the National Physical Therapist Examination (NPTE). This study used a retrospective longitudinal design. A nationally representative sample of 20 programs was drawn from the population of physical therapist …
Examining The Progression Of Disability Benefits Among Employees In The United States, Carolyn E. Danczyk-Hawley
Examining The Progression Of Disability Benefits Among Employees In The United States, Carolyn E. Danczyk-Hawley
Theses and Dissertations
The following project is a compilation of three separate articles all utilizing a database extracted from the UNUM/Provident Life Insurance Company, including all consecutive short-term disability (STD) claims filed with UNUM from January 1, 1994 to December 31, 1996 from claimants who were also insured for long-term disability (LTD) by UNUM. The resulting sample includes 77,297 claims.The results of these studies are part of a larger investigation that documented the Progression of Disability Benefits (PODB) phenomenon. PODB refers to the migration of workers with work-limiting disabilities through a system of economic benefits resulting in their placement onto Social Security Disability …
The Prevalence Of The Need For Esthetic Crown Lengthening In Post Orthodontically Treated Subjects, Bryan Marc Konikoff
The Prevalence Of The Need For Esthetic Crown Lengthening In Post Orthodontically Treated Subjects, Bryan Marc Konikoff
Theses and Dissertations
Prevalence information on excessive gingival display in post-orthodontic patients is limited. By studying one aspect, namely the size relationship of the clinical crowns of teeth, in an orthodontic population, we can begin to quantify their need for periodontal plastic surgery. In this two part study, 200 plaster models were used as subjects, followed by a clinical exam of 31 of those subjects. These models represented patients before and directly after orthodontic therapy, and the Part 2 clinical exams were performed at least five years later. The lengths and widths of the six anterior teeth were measured and these values were …
Single Nucleotide Polymorphisms In The Folypoly-Gamma-Glutamate Synthetase Gene, Nadine Thompson
Single Nucleotide Polymorphisms In The Folypoly-Gamma-Glutamate Synthetase Gene, Nadine Thompson
Theses and Dissertations
Folic acid is an essential vitamin utilized in the one-carbon metabolism pathway for the synthesis of purine and thymidine nucleotides, which are necessary for cell growth and proliferation. As a result, the enzymes that participate in the metabolism of folic acid have been good targets for cancer chemotherapy. Folylpoly-γ-glutamate synthetase (FPGS) is an enzyme in the folate metabolism pathway that catalyzes the addition of glutamic acid to the naturally occurring folates, thereby allowing the retention of folate cofactors in cells. Similarly, in the case of cancer chemotherapy, antifolates, such as Lometrexol and Tomudex are retained in cells through the activity …
Lack Of Knowledge Of Mother-To-Child Transmission In Kenya Among Women Ages 15-49, Nisha Warrier
Lack Of Knowledge Of Mother-To-Child Transmission In Kenya Among Women Ages 15-49, Nisha Warrier
Theses and Dissertations
Purpose: The epidemic of mother-to-child transmission (MTCT) of HIV/AIDS in resource-poor countries is dramatic; it is responsible for nearly 90% of childhood infections. The primary purpose of analysis was to understand the distribution of factors and their association with lack of knowledge of MTCT in Kenya. In parallel, another aim was to identify the relationship between media, particularly frequency of radio exposure, and lack of knowledge.Methods: This study used the 2003 Kenya Demographic and Health Survey (DHS) collected for 8,195 women, ages 15-49. Descriptive analysis, univariate analysis, and logistic regression were completed on SPSS 14 software.Results: In the sample, 1151 …
Relationship Between Cb1 And S1p Receptors In The Central Nervous System, Lauren Michele Collier
Relationship Between Cb1 And S1p Receptors In The Central Nervous System, Lauren Michele Collier
Theses and Dissertations
There is significant sequence homology and anatomical co-distribution between cannabinoid (CB1) and sphingosine-1-phosphate (S1P) receptors in the CNS, but potential functional relationships between these lysolipid receptors have not been examined. Therefore, to investigate possible relationships between these two systems at the level of G-protein activation, agonist-stimulated [35S]GTPγS binding and autoradiography were conducted. Autoradiographic studies were first performed to localize receptor-mediated G-protein activation in mouse brain. Coronal brain slices were processed for stimulation of [35S]GTPγS binding using the synthetic cannabinoid agonist WIN 55,212-2 (WIN) or SIP. High levels of WIN- and S1P-stimulated [35S]GTPγS binding were observed in the caudate putamen, hippocampus, …
Factors Associated With The Provision Of Coronary Heart Disease Preventive Careservices, Patricia Carcaise-Edinboro
Factors Associated With The Provision Of Coronary Heart Disease Preventive Careservices, Patricia Carcaise-Edinboro
Theses and Dissertations
The Anderson and Aday access framework (1974) is utilized to investigate the association of individual and community level, predisposing, socio-demographic, and enabling factors, on potential and realized access to coronary heart disease (CHD) preventive care. The cross-sectional study is based on a sample of adults age 18-85 from the Medical Expenditure Panel Survey (MEPS) who were identified with CHD risk or who had a CHD diagnosis.Variables from the MEPS and the Area Resource File (ARF) are used to test logistic regression models for dependent variables measuring primary and secondary CHD preventive care services. The primary preventive care measures include blood …
The Corbett Pain Scale: A Multidimensional Pain Scale For Adult Intensive Care Patients, Gina M. Corbett
The Corbett Pain Scale: A Multidimensional Pain Scale For Adult Intensive Care Patients, Gina M. Corbett
Theses and Dissertations
There are no reliable tools that evaluate pain in adult critical care patients who cannot communicate as a result of sedation or illness. This was an observational study in which postoperative cardiothoracic intensive care patients were assessed for pain using both the newly devised Corbett Pain Scale (CPS) and the Numerical Pain Scale (NPS). The CPS was evaluated for content validity, criterion validity, construct validity, test re-test reliability and internal consistency. Thirteen male and seven female patients (n=20) were enrolled and underwent a maximum of five pain assessments each. The mean total scores of the CPS (.740, SD+1.03) and the …
Factors Associated With Hospital Commitment To Provide Child/Adolescent Psychiatric Services, Lea Anne Gardner
Factors Associated With Hospital Commitment To Provide Child/Adolescent Psychiatric Services, Lea Anne Gardner
Theses and Dissertations
General acute care hospitals play a particularly important role in the delivery of children's mental health given the extant lack of alternatives to long term hospitals for patients requiring a restrictive treatment environment (Glied and Cuellar, 2003). This cross-sectional study identifies environmental and organizational factors associated with general acute care and children's hospitals in the United States that provide hospital-based child/adolescent psychiatric services and the number of services. Two macro-level theories, Resource Dependence Theory and Institutional Theory were used to identify environmental and organizational factors. A nationwide sample of hospitals was drawn from the 2003 AHA annual survey. Data from …
Assessing Epidermal Growth Factor Expression In The Rodent Hippocampus Following Traumatic Brain Injury, Janice Mabutas Daus
Assessing Epidermal Growth Factor Expression In The Rodent Hippocampus Following Traumatic Brain Injury, Janice Mabutas Daus
Theses and Dissertations
Hippocampal neurons are vulnerable to injury, as indicated by the prevalence of learning and memory deficits following traumatic brain injury. Research indicates that proliferation of neural precursor cells increases following brain injury, which implies that there is an endogenous response in the hippocampus to replenish neurons and restore cognitive function. Studies show that mitogenic growth factors may drive this proliferative response; one of which is epidermal growth factor. Because adults and the elderly manifest the most enduring deficits following TBI, it is critical to investigate how EGF expression following injury may relate to injury-induced cell proliferation and the degree of …
The Effect Of Silencing The Wilms' Tumor 1 Gene On The Radiation Sensitivity Of Glioblastoma Cells, Dana C. Chan
The Effect Of Silencing The Wilms' Tumor 1 Gene On The Radiation Sensitivity Of Glioblastoma Cells, Dana C. Chan
Theses and Dissertations
Glioblastomas are among the most devastating of human cancers with a median survival of only 9-12 months. This type of brain tumor is incurable, largely due its remarkable proliferative capacity and resistance to current treatments. High levels of the Wilms' Tumor 1 (WTI) gene have been identified in glioblastomas, suggesting an oncogenic function. Moreover, known WT1 target genes have been implicated in resistance to radiation. To determine the role of WT1 in radiation resistance, two glioblastoma cell lines expressing WT1 were treated with siRNAs to silence this gene. Confirmation of WT1 knockdown was achieved through real-time PCR and Western blot. …
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 …
Health Promoting Lifestyle And Quality Of Life In Patients With Chronic Obstructive Pulmonary Disease, Saichol Janwijit
Health Promoting Lifestyle And Quality Of Life In Patients With Chronic Obstructive Pulmonary Disease, Saichol Janwijit
Theses and Dissertations
Chronic obstructive pulmonary disease (COPD) has a severe impact on quality of life (QOL). Using the Health Promotion Model as a guide, a cross-sectional, correlational design was used to describe relationships among individual characteristics and experiences (age, gender, race, severity of illness, resilience), behavior-specific cognitions and affect (self-efficacy, barriers, social support), behavioral outcomes (health promoting lifestyle), and QOL in this patient population. One hundred and twenty participants were recruited from three clinics at Virginia Commonwealth University Health System. In addition to a demographic survey, participants completed a 151-item questionnaire incorporating measures resilience, severity of illness, self-efficacy, and barriers to a …
Factors Influencing Health Status In Community-Dwelling Older Adults, Janet Jestina Byam-Williams
Factors Influencing Health Status In Community-Dwelling Older Adults, Janet Jestina Byam-Williams
Theses and Dissertations
This descriptive, correlational study was based on Pender's Health Promotion Model (Pender, Murdaugh, & Parsons, 2002). The purpose was to examine factors influencing health status in community-dwelling, older white and black adults. The following research question was addressed by the study: What are the relationships among the individual characteristics (age, gender, race, education, and income); the behavior-specific cognitions and affect (perceived self-efficacy, perceived barriers, and interpersonal influences); and the behavioral outcomes (health-promoting behaviors), and health status in community-dwelling whites and blacks 65 years of age and older? The convenience sample of 113 participants from four congregate meal sites in Central …
Factors Associated With High Sexual Risk Behavior In Single Women, Thomas B. M. Leecost
Factors Associated With High Sexual Risk Behavior In Single Women, Thomas B. M. Leecost
Theses and Dissertations
Objective: This study was to identify factors associated with High Sexual Risk Behavior (HSRB) in single Afro American women seen in an Epidemiology/Sexual transmitted disease (EPID/STD) Clinic in Richmond, Virginia from January 2006 through April 2006.Method: Participants were 154 single women (no history of marriage) between the ages of 18-30 visiting the EPID/STD clinic for the first time.Demographic information was obtained from their records. A volunteer interview was given that contained 101 variables to evaluate for High Sexual Risk Behavior (HSRB). HSRB was defined to response 'yes' to the question, "During the past 3 months did you have sex with …
Functional Redistribution Of Hippocampal Cannabinoid Cb1 Receptors In The Rat Pilocarpine Model Of Acquired Epilepsy, Katherine Winslow Falenski
Functional Redistribution Of Hippocampal Cannabinoid Cb1 Receptors In The Rat Pilocarpine Model Of Acquired Epilepsy, Katherine Winslow Falenski
Theses and Dissertations
Cannabinoids, such as the marijuana derivative Δ9-THC, are known to have CBl receptor-mediated anticonvulsant effects in several animal models of seizures and epilepsy, including the rat pilocarpine model of acquired epilepsy. However, the distribution of CBl receptor expression and function in brains of epileptic rats has not been characterized. Therefore, this dissertation was initiated to evaluate the effect of epileptogenesis on the distribution and function of the endogenous CBI receptor system in the rat pilocarpine model, a well-established model of acquired temporal lobe epilepsy. Using immunohistochemistry, we demonstrated that chronically epileptic rats exhibit a unique, long-term, and specific redistribution of …
The Life Pattern Of People With Spinal Cord Injury, Ronald R. Alligood Ii
The Life Pattern Of People With Spinal Cord Injury, Ronald R. Alligood Ii
Theses and Dissertations
This aim of this study was to answer the research question: "What is the Life Pattern of the Person with Spinal Cord Injury?" The unitary appreciative inquiry design, which has conceptualized through Rogers' (1986) science of unitary human beings, provided an approach for understanding the phenomenon in the context of human wholeness. The data, obtained through the methodology of unitary appreciative inquiry, led to the development of individual synopses for each of the participants. Once the synopses were completed, a composite pattern profile was constructed by the researcher that was indicative of the life pattern of people with spinal cord …
The Anti-Plaque Efficacy Of Listerine® Used In Combination With Toothbrushing In Orthodontic Patients, Zachary A. Casagrande
The Anti-Plaque Efficacy Of Listerine® Used In Combination With Toothbrushing In Orthodontic Patients, Zachary A. Casagrande
Theses and Dissertations
The bactericidal efficacy of Listerine®, the essential oil-containing mouthrinse, has long been recognized. The purpose of this study was to determine whether Listerine® mouthrinse, when added to the standard oral hygiene regimen, had an added benefit in reducing plaque and gingivitis development in orthodontic patients over a six-month period. 50 orthodontic patients from the Virginia Commonwealth University Department of Orthodontics were assigned either to the brushing + flossing (N= 25) or brushing + flossing + Listerine® (N = 25) group. At baseline (TI), measurements for the Ramfjord teeth were recorded for the gingival index, plaque index and bleeding index. Subsequent …
Southeast Asian Immigrant Women's Perspectives On Domestic Violence, Pataporn Saengkhiew
Southeast Asian Immigrant Women's Perspectives On Domestic Violence, Pataporn Saengkhiew
Theses and Dissertations
This study addresses the question, "What is the lived experience of Southeast Asian immigrant women who live in the United States related to domestic violence, including the relationships with their partners, their knowledge of domestic violence, and the existence of domestic violence in the Asian community?" Fourteen Thai women engaged in semistructured interviews during which they were asked to describe their experience. This study chose the phenomenological approach, using content analysis that identified six major themes representing essential aspects of the experience, as described by the participants: (a) Knowledge about Domestic Violence and Sources of Information, (b) The experience of …
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 …
Characterization Of Perphenazine And Scopolamine Aerosols Generated Using The Capillary Aerosol Generator, Xihao Li
Theses and Dissertations
The characterization of perphenazine and scopolamine aerosols generated using the capillary aerosol generator (CAG) was reported. Variables including steady state power, the formulation vehicle, the drug concentration and the formulation flow rate were studied for their effects on the chemical stability and particle size of these drug aerosols.Stability-indicating HPLC and LC-MS assays were developed and validated for perphenazine and scopolamine, respectively. The chemical stability of each compound was investigated under a variety of stress conditions and the structure of degradation products was proposed.Perphenazine aerosols were generated from propylene glycol (PG) formulations with concentrations of 9, 48 and 90mM at formulation …
Diffuse Brain Injury Triggers Ultra-Rapid Perisomatic Traumatic Axonal Injury, Wallerian Change, And Non-Specific Inflammatory Responses, Brian Joseph Kelley
Diffuse Brain Injury Triggers Ultra-Rapid Perisomatic Traumatic Axonal Injury, Wallerian Change, And Non-Specific Inflammatory Responses, Brian Joseph Kelley
Theses and Dissertations
A significant component of diffuse brain injury (DBI) is diffuse axonal injury (DAI) which is responsible for the morbidity and mortality associated with this condition. DAI and its experimental counterpart traumatic axonal injury (TAI) result in scattered microscopic pathology characterized by focal impairment of axonal transport leading to progressive swelling and delayed axotomy. DBI-mediated perisomatic axotomy does not result in acute neuronal death suggesting that delayed axotomy was responsible for this unanticipated response. To evaluate this hypothesis, we examined the spatiotemporal progression of DBI-mediated perisomatic TAI. LM / TEM identified impaired axonal transport within 15 - 30 min post-injury. Perisomatic …
Ige Production Regulation Via Cd23 Stalk Engagement And Cell Cycle Stimulation, Timothy Hays Caven
Ige Production Regulation Via Cd23 Stalk Engagement And Cell Cycle Stimulation, Timothy Hays Caven
Theses and Dissertations
CD23, the low affinity receptor for IgE, is expressed mainly on B cells and has been shown to regulate IgE production. Previously, recombinant mouse and human CD23 were constructed with a trimerizing isoleucine zipper motif attached in frame to the N-terminus of the entire extracellular CD23 (lz-ECCD23). The goal was to examine the role of the necessity of the CD23 stalk for binding IgE. Using PCR-based mutagenesis to delete the majority of the stalk, binding to IgE was lost. Further studies examined the effect of lz-ECCD23 in preventing IgE from binding FcεRI and therefore acting as a therapeutic agent. It …
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 …
A Model For Studying Vasogenic Brain Edema, Anshu Shukla
A Model For Studying Vasogenic Brain Edema, Anshu Shukla
Theses and Dissertations
Convection-enhanced delivery (CED) is a proven method for targeted drug delivery to the brain that circumvents the blood-brain barrier (BBB). Little study has been conducted in understanding CED in pathological brain states. This is of importance when dealing with chemotherapeutic agent delivery to brain tumors, where vasogenic edema (VE) exists. The current study aims to characterize a model of VE suitable for studying CED.VE was produced in the right hemisphere of the rat brain using multiple infusions of hyperosmotic mannitol (0.25mL/kg/s over 30 seconds) delivered through the right internal carotid artery. Magnetic resonance imaging (MRI) revealed consistent edema formation and …
Determinants Of Dating Violence Among Youth In The U.S., Candace Hamm
Determinants Of Dating Violence Among Youth In The U.S., Candace Hamm
Theses and Dissertations
Background: Physical Dating Violence (PDV) victimization is a major public health concern among adolescents in the United States. Research has shown that determinants of PDV victimization are different for male and female adolescents. However, inconsistent findings entail that further research needs to be done using a representative sample of male and female adolescents.Objective: To identify gender-specific determinants of PDV victimization utilizing a nationally representative sample of high school adolescents.Methods: Data from the 2005 National Youth Risk Behavior Survey was used for this analysis. The study population included 6.951 male and 6,807 female students in grades 9 through 12. Bivariate and …
The Effect Of Variability In Substance Abuse And Dependence Terminology On Physicians' Prescribing Decisions, Lisa Rochelle Burroughs Phipps
The Effect Of Variability In Substance Abuse And Dependence Terminology On Physicians' Prescribing Decisions, Lisa Rochelle Burroughs Phipps
Theses and Dissertations
Prescription drug abuse is a continuing problem in the United States. Educating physicians on issues related to prescription drug abuse is a key factor in preventing and treating this problem. High variability has been found in substance abuse terminology in the literature, textbooks, and FDA-approved product labeling. This dissertation describes a survey study designed to address how the variability in substance abuse terminology, specifically package inserts, affects the prescribing decisions made by physicians.A random sample of 1008 physicians currently licensed and residing in the Commonwealth of Virginia received a letter of explanation, a self-administered questionnaire, and a follow-up reminder and …