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Articles 4111 - 4140 of 7325
Full-Text Articles in Entire DC Network
Preparation And Characterization Of Stable Macroporous Titania Nano-Wells, Hema Santhi Aluri
Preparation And Characterization Of Stable Macroporous Titania Nano-Wells, Hema Santhi Aluri
Theses and Dissertations
Silica based sol-gel thin films have been extensively studied because of their advantages that include optical transparency, high biodegradability and low intrinsic fluorescence. However, one concern with silica based sol-gel derived materials is their long term stability in aqueous solutions. Another concern is their limited porosity. These two concerns limit the application of these materials in catalysis and separations. The main objective of this study is to prepare porous, thin films using titanium alkoxides as precursors and evaluate their long term stability in aqueous solutions. Colloidal crystal templating will be used to introduce macrosized pores into the titania network. The …
Assessment Of Perceived Positive And Negative Outcomes In Risky Adolescent Dating And Peer Situations: A Descriptive Analysis Of Risk And Benefit Perception, Sarah Helms
Theses and Dissertations
Peer and dating violence perpetration and victimization are common experiences placing adolescents at-risk for maladaptive outcomes, yet little research has focused on specific problematic situations associated with these types of violence and other related risk-taking behaviors. Further, prevention programs have typically focused on changing beliefs, attitudes, and skill-deficits, with little attention to adolescents’ motivations or perceptions of costs and benefits associated with risky situations, despite support for this type of research in other health-related fields (e.g., substance abuse, behavioral medicine). The current study assessed adolescents’ perceptions of potential positive and negative outcomes associated with risky dating and peer situations, many …
The Things You Never Did Because You Might Die Trying., Kylene Thompson
The Things You Never Did Because You Might Die Trying., Kylene Thompson
Theses and Dissertations
Artist Statement My work is about the military. I represent my views of the military from my perspective as a military wife, sister, and daughter. The themes are about separation, endurance, and the fragility that lies beneath the people who serve, and the people that support them. It’s about pain, violence, anxiety, and fear, as well as pride and honor. I want my work to enhance the view of the military but also depict its hardships.
Analysis Of The Regulation Of The Transferrin Iron Acquisition System In Neisseria Gonorrhoeae, Acevedo Rosuany Vélez
Analysis Of The Regulation Of The Transferrin Iron Acquisition System In Neisseria Gonorrhoeae, Acevedo Rosuany Vélez
Theses and Dissertations
The neisserial transferrin binding proteins (Tbps) comprise a bipartite system for iron acquisition from human transferrin. TbpA is a TonB-dependent outer membrane protein that forms the pore for iron internalization. TbpB is a surface-exposed lipoprotein that makes the iron-uptake process more efficient. Previous studies have shown that the genes encoding these proteins are arranged in a bicistronic operon, with the tbpB gene located upstream of tbpA. The operon is under the control of the ferric uptake regulator (Fur) protein. However, promoter elements necessary for the regulation of the operon have not been experimentally defined. In this study, putative regulatory motifs …
Seasons, Paula Golden
Seasons, Paula Golden
Theses and Dissertations
A sense of place and time has been the unconscious focus of my adult life. While living in Hawaii I often searched for ancient rock carving sites. These art forms have the ability to convey the mystery, magic and history of previous times. I use human figures, beads and various textiles with similarities to these petroglyphs as a powerful metaphor for my search to find a place that is home
The Genetic Epidemiology Of Purging Disorder, Anorexia Nervosa, And Obsessive Compulsive Personality Disorder, Sara Trace
Theses and Dissertations
Although a variety of factors influence the development of eating disorders, genetic factors contribute notably to their etiology. Understanding genetic factors associated with eating disorders is important, as they can influence how these disorders are recognized, researched, and treated. This dissertation included two studies addressing important questions within the fields of eating disorders and genetics; specifically, Study 1 addressed the prevalence and heritability of purging and purging disorder in a population-based sample of female twins from the United States; and Study 2 investigated the nature of the co-morbidity between anorexia nervosa and obsessive compulsive personality disorder in a population-based sample …
Dilute Sulfuric Acid Pretreatment Of Switchgrass In Microwave Reactor For Biofuel Conversion: An Investigation Of Yields, Kinetics,, Oscar Martin
Theses and Dissertations
Lignocellulosic materials provide a raw material source for biofuel conversion and offer several advantages over fossil fuels- usage of a renewable resource, reduced greenhouse emissions, a decreased dependence on foreign oil, and stimulation of the agricultural sector. However, a primary technological challenge in converting lignocellulosic biomass into fuel is overcoming the recalcitrance of its matrix to enzymatic hydrolysis. To overcome these problems for chemical processing, naturally occurring cellulose biomass must be pretreated before it can be further processed using enzymatic hydrolysis or bioconversion. The goal of this work was to develop a model that predicts the glucose yield (pretreatment and …
Nonhomologous End-Joining: Tdp1-Mediated Processing, Atm-Mediated Signaling, Amy Hawkins
Nonhomologous End-Joining: Tdp1-Mediated Processing, Atm-Mediated Signaling, Amy Hawkins
Theses and Dissertations
This thesis investigates two separate features of nonhomologous end-joining (NHEJ) DNA repair: end processing, and DNA repair kinase signaling. DNA end processing was investigated in a mouse model of hereditary spinocerebellar ataxia with axonal neuropathy (SCAN1), a congenital neurodegenerative disease. SCAN1 is caused by a homozygous H493R mutation in the active site of tyrosyl-DNA phosphodiesterase (TDP1). To address how the H493R mutation elicits the specific pathologies of SCAN1 and to further elucidate the role of TDP1 in processing DNA end modifications, we generated a Tdp1 knockout mouse and characterized their behavior and specific repair deficiencies in extracts of embryonic fibroblasts …
[2009-11-12] November 12, 2009 Meeting Of The Board Of Visitors Of Virginia Commonwealth University, Virginia Commonwealth University. Board Of Visitors
[2009-11-12] November 12, 2009 Meeting Of The Board Of Visitors Of Virginia Commonwealth University, Virginia Commonwealth University. Board Of Visitors
VCU Board of Visitors Minutes
Official minutes of the VCU Board of Visitors and its Executive Committee.
[2009-11-11] Meeting Of The Finance, Investment And Property Committee, Virginia Commonwealth University. Board Of Visitors
[2009-11-11] Meeting Of The Finance, Investment And Property Committee, Virginia Commonwealth University. Board Of Visitors
VCU Board of Visitors Minutes
Official minutes of the VCU Board of Visitors and its Executive Committee.
[2009-11-11] Meeting Of The Board Of Visitors Of Virginia Commonwealth University, Virginia Commonwealth University. Board Of Visitors
[2009-11-11] Meeting Of The Board Of Visitors Of Virginia Commonwealth University, Virginia Commonwealth University. Board Of Visitors
VCU Board of Visitors Minutes
Official minutes of the VCU Board of Visitors and its Executive Committee.
[2009-11-11] Meeting Of The External Relations Committee, Virginia Commonwealth University. Board Of Visitors
[2009-11-11] Meeting Of The External Relations Committee, Virginia Commonwealth University. Board Of Visitors
VCU Board of Visitors Minutes
Official minutes of the VCU Board of Visitors and its Executive Committee.
Loving You Saved My Life, Laine Bowen
Loving You Saved My Life, Laine Bowen
Theses and Dissertations
When I create art it is as though I am building a metaphorical cathedral. Although there is serenity and faith within the process, there simultaneously exists an equal measure of frustration and mystery in the final outcome. At times I am like an ancient Chinese monk who, scrambling to please a merciless emperor, stumbles at last upon his pet cricket’s cage and using this accidental inspiration designs the perfect plan for the Forbidden City. My art then, at its best, possesses the rigidity of ritual, the flexibility of enlightenment and the joy of invention. I believe in the power of …
Facing Faces, John Luck
Facing Faces, John Luck
Theses and Dissertations
I am a surrealist at heart. I enjoy the creative process of making a visual story that uses unusual imagery. Every work is a reflection of some part of my aesthetic belief: an outgrowth of my individuality. The art I produce is a direct reflection of my personality, beliefs, values, and experiences. I wear my emotions on my sleeve and I have a strong sense of identity. My work exhibits intense colors and strong contrasts. Each has its own underlying subtleties that express the inner depth of the concept. A little attention-deficient and a little bipolar, I am an erratic …