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Articles 24151 - 24180 of 31065
Full-Text Articles in Entire DC Network
Lucky Strike Branch Library, Vanessa Yvonne Vinsant
Lucky Strike Branch Library, Vanessa Yvonne Vinsant
Theses and Dissertations
This thesis project is an examination of how design can reinvigorate interest in reading through the creation of a branch library. The primary focus of this study is to generate a space that successfully binds intellectual interests, social and economic groups to re-establish community.
Virginia Emergency Department Physician Knowledge Of The Emergent Treatment Of Avulsed Teeth, Joy Leatrice Barnes Phelps
Virginia Emergency Department Physician Knowledge Of The Emergent Treatment Of Avulsed Teeth, Joy Leatrice Barnes Phelps
Theses and Dissertations
Purpose: The purpose of this study was to determine the knowledge and treatment protocols for physicians in Virginia emergency departments in regards to the emergent treatment of avulsed teeth.Methods: Using a cross sectional survey design, an 8-item questionnaire regarding the treatment of avulsed teeth was emailed to 75 emergency department chairpersons in Virginia. After 30 days, a reminder paper copy of the questionnaire was mailed and an email reminder with the on-line link was sent. After 60 days the study was closed. Comparisons were made using chi-square analysis based on percentages to test for significance. Results: The response rate was …
Alternative Orthodontic Bonding Protocol Using Self Etching Primer, Rush-Baker Gaines Caldwell
Alternative Orthodontic Bonding Protocol Using Self Etching Primer, Rush-Baker Gaines Caldwell
Theses and Dissertations
The purpose of the current study was to develop a bonding method that can achieve clinically acceptable bond strength values while leaving a minimum amount of adhesive on the tooth surface during the debonding process. One hundred teeth were randomly assigned into groups. Five different enamel surface preparation protocols were tested (N = 20, each): Conventional acid etch, standard SEP, SEP applied with a light brush stroke (altered SEP 1), SEP applied directly to the composite of pre-coated bracket (altered SEP 2), and Primer Only groups. Brackets were debonded using an Instron universal testing machine (Instron, Canton, MA) in shear …
Endocannabinoid Modulation Of Spatial Memory In Aversively And Appetitively Motivated Barnes Maze Tasks, John Pinckney Harloe
Endocannabinoid Modulation Of Spatial Memory In Aversively And Appetitively Motivated Barnes Maze Tasks, John Pinckney Harloe
Theses and Dissertations
Genetic deletion or pharmacological blockade of the CB1 receptor has been reported to impair extinction learning in aversive conditioning (i.e., conditioned fear and Morris water maze) paradigms, but not in operant procedures in which food reinforcement is earned. It is difficult to discern whether the differential effects caused by CB1 receptor disruption on extinction result from the hedonics (i.e., aversive vs. appetitive) or is related to the required responses associated with these disparate tasks. In order to evaluate whether the hedonics is the determining factor, we used either aversive (i.e., escape from bright lights and air turbulence) or appetitive (i.e., …
Effects Of Smoking And Gender On Tetrahydroisoquinolines And Beta-Carbolines In A Healthy Population And During Alcohol Detoxification, Satjit Singh Brar
Effects Of Smoking And Gender On Tetrahydroisoquinolines And Beta-Carbolines In A Healthy Population And During Alcohol Detoxification, Satjit Singh Brar
Theses and Dissertations
The purpose of this investigation was to evaluate the effects of smoking and gender on 1) tetrahydroisoquinolines (TIQs) and beta-carbolines (BCs) in a population of healthy subjects and 2) TIQs in an alcohol-dependent population undergoing in-patient detoxification. Comparison in plasma TIQs between the populations was additionally conducted. To support the clinical investigations, a HPLC-FD method was developed and validated to assess plasma concentrations of BCs, harman and norharman, while a HPLC-ESI-MS/MS method was validated to quantify the TIQs, R/S-salsolinol along with dopamine. Forty-one young volunteers were recruited including 19 nonsmokers (NS), 11 light smokers (LS) and 11 heavy smokers (HS), …
Characterization Of Yeast 18s Rrna Dimethyl Transferase, Dim1p, Nagesh Pulicherla
Characterization Of Yeast 18s Rrna Dimethyl Transferase, Dim1p, Nagesh Pulicherla
Theses and Dissertations
Eukaryotic ribosome biogenesis, a dynamic and coordinated multistep process which requires more than 150 trans-acting factors, has been intensely studied in the yeast Saccharomyces cerevisiae. This evolutionarily conserved process involves numerous cleavages of pre-rRNA, modification of nucleotides, and concomitant assembly of the ribosomal proteins onto the rRNA. Considerable information is available about the importance of conserved pre-rRNA cleavage events in ribosome biogenesis; however, very little is known about the exact role of modified nucleotides, which cluster within the functionally important regions of the ribosome. One conserved group of modifications is the dimethylation of two adjacent adenosines at the 3´ end …
Density Of Gutta Percha By Weight In Straight Root Canals And Curved Root Canals After Single Cone, Cold Lateral, And Warm Vertical Condensation, Gerald Clay Sparrow
Density Of Gutta Percha By Weight In Straight Root Canals And Curved Root Canals After Single Cone, Cold Lateral, And Warm Vertical Condensation, Gerald Clay Sparrow
Theses and Dissertations
The purpose of this study was to compare the density of gutta percha following three different obturation techniques using two split-tooth models. One split-tooth model was constructed with a straight rooted maxillary incisor and the other with the curved palatal root of a maxillary molar. Each tooth was obturated using single cone, cold lateral, and warm vertical obturation techniques without sealer. Each obturation technique was performed 20 times for each of the root systems. The weights of the gutta percha were recorded for each root type and obturation technique by subtracting the post-fill weight from the pre-fill weight of the …
Evaluation Of An Early Discharge Policy For Infants With Apnea Of Prematurity, Cheryl N. Bodamer
Evaluation Of An Early Discharge Policy For Infants With Apnea Of Prematurity, Cheryl N. Bodamer
Theses and Dissertations
This research examines the safety and cost effectiveness of an institutional policy on discharge of preterm infants with Apnea of Prematurity (AOP) from the Virginia Commonwealth University Medical Center Newborn Intensive Care Unit (VCUNC NICU) with caffeine therapy and a cardiorespiratory monitor. This practice policy was developed over a decade ago as a cost containment measure in neonatal care and continues to be implemented today despite the lack of a formal evaluation. The secondary objective was to examine through a review of the literature the psychosocial impact of premature birth on the family and the potential effect on the infant's …
Examining The Behavioral And Molecular Aspects Of Adolescent Nicotine Dependence: Implications For Vulnerability To Drugs Of Abuse, Dena Heath Kota
Examining The Behavioral And Molecular Aspects Of Adolescent Nicotine Dependence: Implications For Vulnerability To Drugs Of Abuse, Dena Heath Kota
Theses and Dissertations
Approximately 200 million men and 100 million women smoke worldwide. In the United States, an estimated 25.9 million men (23.9 percent) and 20.7 million women (18.1 percent) are smokers. The commencement of smoking at a young age is thought to increase addiction liability, decrease the probability of successful cessation, and correlate with a higher number of cigarettes smoked per day. Studies from the World Health Organization indicate that between 80,000 and 100,000 children start smoking every day worldwide. These statistics suggest that adolescence is a critical phase for developing nicotine dependence. The work in this dissertation contributes to the further …
5-Ht3 Receptor Ligands And Their Effect On Psychomotor Stimulants, Jessica Nicole Worsham
5-Ht3 Receptor Ligands And Their Effect On Psychomotor Stimulants, Jessica Nicole Worsham
Theses and Dissertations
Drug abuse and addiction are considered to be a result, at least in part, of the rewarding effects produced by increasing dopamine levels. 5-HT3 serotonin receptors have been shown to indirectly affect dopamine levels. Therefore, the effect of the 5-HT3 receptor partial agonist, MD-354, on the actions of psychomotor stimulants was analyzed in mouse locomotor activity assays to determine whether MD-354 is working through a 5-HT3 receptor agonist or antagonist mode of action. Studies with (+)amphetamine and (+)methamphetamine in combination with MD-354 indicated MD-354 is either devoid of action or is behaving similar to the 5-HT3 receptor antagonist, ondansetron. This …
The Psychosocial Influence Of Dental Esthetics In Adolescents As Judged By Peers, Scott Thomas Henson
The Psychosocial Influence Of Dental Esthetics In Adolescents As Judged By Peers, Scott Thomas Henson
Theses and Dissertations
The purpose of this study was to determine if dental esthetics affects the perception of adolescents regarding their peer's social aptitude in specific areas such as athletics, popularity, leadership, and academics. Ten patient photographs (4 males, 6 females) from a private orthodontic practice in Richmond, VA were selected for inclusion in this study. The frontal smiling photographs were digitally modified with insertion of either an ideal smile (straight) or a non-ideal smile (crooked) to create an image identical to the original except for an altered dental complex. Laypersons rated the straight and crooked patient photographs for athletic performance, socialization skills …
In Pursuit Of Paternal Significance: Fathers' Influence On Their Daughters' And Sons' Sexual Behaviors And Beliefs, Rachel S. Everley
In Pursuit Of Paternal Significance: Fathers' Influence On Their Daughters' And Sons' Sexual Behaviors And Beliefs, Rachel S. Everley
Theses and Dissertations
The United States has the highest teen pregnancy and adolescent STD rates of any industrialized nation. Numerous factors are involved in adolescent sexual decision-making and the social-ecological framework suggests that there are multiple levels of influence on adolescent development, including familial. Utilizing survey data from the Virginia Abstinence Education Initiative (VAEI), this project specifically explores paternal influences on adolescent sexual behavior and beliefs by examining paternal residence in the home, perceived paternal figure sexual beliefs, and father-child relationship factors. Results indicate that paternal figures influence their daughters' and sons' sexual behaviors as well as beliefs. Differences in paternal figure influence …
Characterization Of Microorganisms Of Interest To Homeland Security And Public Health Utilizing Liquid Chromatography/Mass Spectrometry, Robert A. Everley
Characterization Of Microorganisms Of Interest To Homeland Security And Public Health Utilizing Liquid Chromatography/Mass Spectrometry, Robert A. Everley
Theses and Dissertations
Liquid chromatography/quadrupole time of flight mass spectrometry (LC/QTOF MS) utilizing electrospray ionization was employed to monitor protein expression in Escherichia coli and Shigella organisms. Automated charge state deconvolution, spectral subtraction and spectral mirroring were used to reveal subtle differences in the LC/MS data. Reproducible intact protein biomarkers were discovered based on their unique mass, retention time and relative intensity. These markers were implemented to differentiate closely related strain types, (e.g. two distinct isolates of E. coli O157:H7) and to correctly identify unknown pathogens. Notable, was the distinction of multiple serotypes of enterohaemorrhagic E. coli which cannot be distinguished by clinical …
Inflammation-Associated Gene Regulation In Primary Astrocytes, Glial Tumors And Cellular Differentiation, Katarzyna Marta Wilczynska
Inflammation-Associated Gene Regulation In Primary Astrocytes, Glial Tumors And Cellular Differentiation, Katarzyna Marta Wilczynska
Theses and Dissertations
This dissertation elucidates several independent molecular mechanisms that function in astrocytes and glial tumor cells, and suggest that developmental and inflammatory signals may contribute to the development of brain tumors. First, we analyzed the mechanism of TIMP-1 activation in astrocytes and glioblastoma cells. TIMP-1 expression is activated by IL-1, which is the major neuroinflammatory cytokine, via simultaneous activation of IKK/NF-kB and MEK3/6/p38/ATF-2 pathways in primary human astrocytes. In contrast to astrocytes, TIMP-1 is expressed at lower levels in glioblastomas, and is not regulated by IL-1 due to either dysfunctional IKK/NF-kB or MEK3/6/p38/ATF-2 activation. Thus, we propose a novel mechanism of …
Grace Street Senior Center, Virginia Brockett
Grace Street Senior Center, Virginia Brockett
Theses and Dissertations
Societal structure has changed through the decades to reflect a contemporary interest in youth culture. The nuclear family, where generations lived under one roof no longer exists, leaving the elderly on the periphery of the family structure. Where once grandparents, parents and children all cohabitated, now the oldest family members are relegated to solitary retirement and aging alone. Studies have shown that "depression in the elderly is more likely to lead to suicide. Elderlywhite men are at greatest risk, with suicide rates in people ages 80 to 84 more than twice that of the general population. The National Institute of …
Fluoride Varnish Use Among Dentists In Virginia, Amanda Bowen Kuhn
Fluoride Varnish Use Among Dentists In Virginia, Amanda Bowen Kuhn
Theses and Dissertations
Purpose: The purpose of this study was to asses fluoride varnish use by dental practitioners in Virginia. Methods: Using a cross sectional survey design, all dentists in Virginia who are members of the Virginia Dental Association (VDA) were sent an online survey about usage and knowledge of fluoride varnish. Results: The majority of the respondents were general dentists (79%) followed by pediatric dentists (12%). Fluoride varnish use increased with year of graduation from dental school. Dentists who thought fluoride varnish was more effective and less time consuming use it more than other topical fluorides. Dentists who thought their patients prefer …
Orthodontic Bracket Bond Strength Using Self-Etching Primer With Or Without Pumice Or Acid Etch Pretreatment, Ana Paula Decastro
Orthodontic Bracket Bond Strength Using Self-Etching Primer With Or Without Pumice Or Acid Etch Pretreatment, Ana Paula Decastro
Theses and Dissertations
The purpose of this study was to compare the shear bond strength of orthodontic brackets to enamel in four bonding protocols: SEP without prior pumicing (None), Pre-etch and SEP without prior pumicing (Pre-etch), control: SEP with prior pumicing (Pumice), and Pre-etch and SEP with prior pumicing (Both). 80 extracted bovine incisors were randomly divided into 4 groups of 20, and brackets were bonded under the different experimental conditions. Debonding force was measured with an Instron universal testing machine. A two-way ANOVA comparing the four groups indicated that there was a significant difference in debonding force (P = 0.001). The SEP …
The Possibilities Of Sort Of, Jesse Robinson
The Possibilities Of Sort Of, Jesse Robinson
Theses and Dissertations
Simultaneity and conflict are incessant qualities one is confronted with when looking at things. Shifting from familiar to foreign, from present to implied. There seems to be a tendency, if not necessity to embrace this multiplicity. Using the film theory construct of extra-diegetic and relative qualifier 'sort of' to investigate Pulp Fiction, Bose Wave CD player, Sunset Boulevard, American Apparel, and The Uncanny.
Sli Prevelence [Sic] Among Military Dependent Children, Nicole Reybok
Sli Prevelence [Sic] Among Military Dependent Children, Nicole Reybok
Theses and Dissertations
No abstract provided.
Nasa And The Technology Transfer Process : An In-Depth Appraisal, Susan H. Raizer
Nasa And The Technology Transfer Process : An In-Depth Appraisal, Susan H. Raizer
Theses and Dissertations
No abstract provided.
College Students' Attitudes Toward Singlehood, Lisa Peterson
College Students' Attitudes Toward Singlehood, Lisa Peterson
Theses and Dissertations
No abstract provided.
Design Requirements Of A Sustainable Habitat For Off Grid Operations, Michael Dennis Sisk
Design Requirements Of A Sustainable Habitat For Off Grid Operations, Michael Dennis Sisk
Theses and Dissertations
No abstract provided.
The Relationship Of Outer Ear Characteristics To The Sound Pressure Levels Of Personal Listening Devices, Lisa A. Chandy
The Relationship Of Outer Ear Characteristics To The Sound Pressure Levels Of Personal Listening Devices, Lisa A. Chandy
Theses and Dissertations
No abstract provided.
How Pitchers Getting Ahead In The Count Influences Earned Runs, Joseph E. Carnahan
How Pitchers Getting Ahead In The Count Influences Earned Runs, Joseph E. Carnahan
Theses and Dissertations
No abstract provided.
Quality Of Parent-Child Relationships In Native American Suicidality, Jeri Ann Azure
Quality Of Parent-Child Relationships In Native American Suicidality, Jeri Ann Azure
Theses and Dissertations
No abstract provided.
The Influence Of Exercise Status And Gender On Frequency And Direction Of Exercise-Related Images, Kristen M. Greek
The Influence Of Exercise Status And Gender On Frequency And Direction Of Exercise-Related Images, Kristen M. Greek
Theses and Dissertations
No abstract provided.
Noble Adjustments, Emily Rebecca Elbom
Experimental Evaluation Of The Effect Of Minimum Quantity Lubrication In Turning Aisi-4140 Steel, Kalyan Reddy Endapally
Experimental Evaluation Of The Effect Of Minimum Quantity Lubrication In Turning Aisi-4140 Steel, Kalyan Reddy Endapally
Theses and Dissertations
No abstract provided.
Evaluations And Outcome Expectancies For Victims Of Child Sexual Abuse, Troy W. Ertelt
Evaluations And Outcome Expectancies For Victims Of Child Sexual Abuse, Troy W. Ertelt
Theses and Dissertations
No abstract provided.
Monitoring Oil-Palm And Other Threats To The Tanjung Puting National Park With Synthetic Aperture Radar, Dave Hartzell
Monitoring Oil-Palm And Other Threats To The Tanjung Puting National Park With Synthetic Aperture Radar, Dave Hartzell
Theses and Dissertations
No abstract provided.