Digital Commons Network^™

Nanofiltration Membranes From Oriented Mesoporous Silica Thin Films, Mary K. Wooten

Theses and Dissertations--Chemical and Materials Engineering

The synthesis of mesoporous silica thin films using surfactant templating typically leads to an inaccessible pore orientation, making these films not suitable for membrane applications. Recent advances in thin film synthesis provide for the alignment of hexagonal pores in a direction orthogonal to the surface when templated on chemically neutral surfaces. In this work, orthogonal thin film silica membranes are synthesized on alumina supports using block copolymer poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) as the template. The orthogonal pore structure is achieved by sandwiching membranes between two chemically neutral surfaces, resulting in 90 nm thick films. Solvent flux of ethanol through …

The Development And Biocompatibility Of Low Temperature Co-Fired Ceramic (Ltcc) For Microfluidic And Biosensor Applications, Jin Luo

Theses and Dissertations--Chemical and Materials Engineering

Low temperature co-fired ceramic (LTCC) electronic packaging materials are applied for their electrical and mechanical properties, high reliability, chemical stability and ease of fabrication. Three dimensional features can also be prepared allowing integration of microfluidic channels and cavities inside LTCC modules. Mechanical, optical, electrical, microfluidic functions have been realized in single LTCC modules. For these reasons LTCC is attractive for biomedical microfluidics and Lab-on-a-Chip systems. However, commercial LTCC systems, optimized for microelectrics applications, have unknown cytocompatibility, and are not compatible with common surface functionalization chemistries.

The first goal of this work is to develop biocompatible LTCC materials for biomedical applications. …

Functionalized Membranes For Environmental Remediation And Selective Separation, Li Xiao

Theses and Dissertations--Chemical and Materials Engineering

Membrane process including microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) have provided numerous successful applications ranging from drinking water purification, wastewater treatment, to material recovery. The addition of functional moiety in the membranes pores allows such membranes to be used in challenging areas including tunable separations, toxic metal capture, and catalysis. In this work, polyvinylidene fluoride (PVDF) MF membrane was functionalized with temperature responsive (poly(N-isopropylacrylamide), PNIPAAm) and pH responsive (polyacrylic acid, PAA) polymers. It’s revealed that the permeation of various molecules (water, salt and dextran) through the membrane can be thermally or pH controlled. The introduction of …

Nanometer-Scale Membrane Electrode Systems For Active Protein Separation, Enzyme Immobilization And Cellular Electroporation, Zhiqiang Chen

Theses and Dissertations--Chemical and Materials Engineering

Automated and continuous processes are the future trends in downstream protein purification. A functionalized nanometer-scale membrane electrode system, mimicking the function of cell wall transporters, can selectively capture genetically modified proteins and subsequently pump them through the system under programmed voltage pulses. Numerical study of the two-step pulse pumping cycles coupled with experimental His-GFP releasing study reveals the optimal 14s/1s pumping/repel pulse pumping condition at 10 mM bulk imidazole concentration in the permeate side. A separation factor for GFP: BSA of 9.7 was achieved with observed GFP electrophoretic mobility of 3.1×10^-6 cm² s^-1 V^-1 at 10 …

Magnesium-Titanium Alloys For Biomedical Applications, Ilona Hoffmann

Theses and Dissertations--Chemical and Materials Engineering

Magnesium has been identified as a promising biodegradable implant material because it does not cause systemic toxicity and can reduce stress shielding. However, it corrodes too quickly in the body. Titanium, which is already used ubiquitously for implants, was chosen as the alloying element because of its proven biocompatibility and corrosion resistance in physiological environments. Thus, alloying magnesium with titanium is expected to improve the corrosion resistance of magnesium.

Mg-Ti alloys with a titanium content ranging from 5 to 35 at.-% were successfully synthesized by mechanical alloying. Spark plasma sintering was identified as a processing route to consolidate the alloy …

Iron And Iron Oxide Functionalized Membranes With Applications To Selected Chloro-Organic And Metal Removal From Water, Minghui Gui

Theses and Dissertations--Chemical and Materials Engineering

The development of functionalized membranes with tunable pores and catalytic properties provides us an opportunity to manipulate the membrane pore structure, selectivity and reactivity. By introducing the functional groups into membrane pores, dissolved metal ions and reactive particles can be effectively immobilized within the polymer matrix for toxic chloro-organic and heavy metal remediation in water.

A polyelectrolyte functionalized membrane platform with tunable pore size and ion exchange capacity has been developed for iron/iron oxide nano-catalyst synthesis and chlorinated organic compound (trichloroethylene, TCE and polychlorinated biphenyls, PCBs) degradation. Highly robust polyvinylidene fluoride (PVDF) microfiltration membranes are used as the support with …

Layer-By-Layer Assemblies For Membrane-Based Enzymatic Catalysis, Andrew R. Tomaino

Theses and Dissertations--Chemical and Materials Engineering

While considerable progress has been made towards understanding the effect that membrane-based layer-by-layer (LbL) immobilizations have on the activity and stability of enzymatic catalysis, detailed work is required in order to fundamentally quantify and optimize the functionalization and operating conditions that define these properties. This work aims to probe deeper into the nature of transport mechanisms by use of pressure-induced, flow-driven enzymatic catalysis of LbL-functionalized hydrophilized poly(vinyldiene) (PVDF)-poly(acrylic acid) (PAA)-poly(allylamine hydrochloride) (PAH)-glucose oxidase (GOx) membranes. These membranes were coupled in a sealed series following cellulose acetate (CA) membranes for the elimination of product accumulation within the feed-side solution during operation. …

The Effects Of Music Instruction On Phonological Awareness In Children With Hearing Impairment, Chelsea Fitch

Masters Theses

Phonological awareness skills are essential for reading development. Children with hearing loss lack access to essential auditory information that allows development of phonological awareness (Dillon, John, & Pisoni, 2011). Music instruction is becoming a popular approach to teach reading for typically developing children, and studies have supported beneficial effects from this treatment methodology. However, there is limited research regarding the use of music to teach phonological awareness and reading skills to children with hearing impairment (Gromko, 2005).

The effectiveness of a music program on increasing phonological awareness skills in children who are deaf or hard-of-hearing was evaluated in this study. …

Analysis Of The Black Friday Consumer, Lori A. Logan

Masters Theses

No abstract provided.

Emotional Intelligence, Coping Styles, And Psychopathology, Letizia Boin

Masters Theses

Despite its relatively recent origins, Emotional Intelligence (EI), which is the ability to perceive, understand, and manage one's emotions, has been shown to contribute to a variety of outcomes, including academic achievement and relationship satisfaction. Considerable support has been gathered to implicate EI in the development of mental illness such as depression and social anxiety. It has been theorized that a potential pathway in which EI affects mental health is by contributing to the development of coping styles. Stress and coping literature reports enough empirical evidence to suggest that broadly speaking, problem-focused coping is 'adaptive' while avoidant coping is 'maladaptive.' …

Building And Maintaining Legitimacy Online: Unicef's Use Of Facebook, John Kraps

Masters Theses

No abstract provided.

Increasing Cooking And Nutritional Knowledge Of Food Pantry Clients Via Cookbook Intervention, Joshua Kleczynski

Masters Theses

This study was designed to assess eating habits, cooking habits, and nutritional knowledge of food pantry clients. As a whole, the average American consumes a less-than-optimal intake of nutrients. This, combined with the elevated national food insecurity rate of 14.5%, produces an advantageous situation to educate food pantry clients about healthy lifestyle practice through cooking. This study utilized a quasi-experimental design including a pre-assessment, intervention, post-assessment design. Forty-nine participants were included in study, and either received a cookbook (intervention group) or were a control subject and only completed surveys. Results revealed that the cookbook intervention did not elicit any behavior …

Exploratory Factor Analysis Of Body Dysmorphic Disorder Symptom Clusters, Rachel A. Maxwell

Masters Theses

Body dysmorphic disorder (BDD) is a distressing condition that involves a preoccupation with a perceived defect(s) in appearance. Despite the importance of early identification, it is often misdiagnosed. The literature suggests that issues with diagnosis may be because BDD is typically defined by the single symptom of dysmorphic concern (i.e., over concern with an imagined or slight defect in physical appearance). Dysmorphic concern is insufficient to fully characterize the disturbance. This study used exploratory factor analysis to identify symptom clusters from four well-known BDD measures completed by 457 undergraduate students. The extracted content suggested the following symptoms: (a) Dysmorphic Concern, …

The Perceived Benefits Of Participation In Living And Learning Communities: The Student Perspective, Sally Adams

Masters Theses

Students' experiences outside the classroom are important to their overall growth and development. Living learning communities (LLC) play a big role in helping to support these areas of growth. Students residing in an LLC are aware of the benefits of the LLC experience and can articulate how their residential environment can help them develop. Non-LLC members find it difficult to define the LLC experience and are not receiving the same benefits. Institutions and residence life often struggle in evaluating and assessing these communities because of the lack of direction and outcomes not clearly being stated. If institutions work to clearly …

Foreign Direct Investment Led Growth And Its Determinants In Sub-Saharan African Countries, Tewodros Zerihun Demelew

Masters Theses

Despite FDI's growth in Sub-Saharan African (SSA) countries, the evidence from earlier studies on FDI led economic growth and key determinants of FDI in SSA countries have been inconclusive. This paper provides up-to-date evidence on the question: does FDI lead to economic growth? And if so, what are the key determinants of FDI growth in SSA countries? In this study we use three estimation approaches, OLS with robust standard errors (robust regression), multi-level random-effects regression, and fixed-effects regression. The multi-level and fixed-effects regression are aimed to help us control for within-country and between-country effects. Based on a panel dataset for …

The Effects Of Existential Salience On State Anxiety, Joseph Morger

Masters Theses

Existential anxiety is theorized to result from one's knowledge of human existence. Four givens of life have been identified that result in existential anxiety: death, freedom, isolation, and meaninglessness (Yalom, 1980). Terror management theory purposes the knowledge of one's own death to be a great source of distress. The theory posits that to cope with these distressing thoughts, one is motivated to adhere to a cultural worldview. Adhering to a cultural worldview allows one to view the world as a structured place, in addition to raising one's self-esteem. Terror management research has shown that making mortality salient results in harsher …

Comparison Of Muscular Strength And Hypertrophy In High Repetition Training Versus Low Repetition Training For The Bench Press Exercise, Tyler Mink

Masters Theses

No abstract provided.

Effects Of Instream Habitat Restoration On Macroinvertebrate And Fish Communities In A Small Midwestern Stream, Manisha Pant

Masters Theses

Although millions of dollars are spent annually on stream habitat restoration, the biological responses to these restorations are rarely monitored. I assessed the impact of habitat enhancement on fish and macroinvertebrate abundance and diversity in a small Midwestern stream. Fish and macroinvertebrate communities were sampled annually in two restored and two unrestored sites beginning two years before and continuing four years after restoration. Habitat heterogeneity increased in the restored sites following the restoration, but there were no significant changes in most macroinvertebrate and fish community indices. Macroinvertebrate composition was significantly different between spring and fall, but in general, assemblages within …

Does Parent Management Of Past Childhood Sibling Aggression Predict Young Adult Emotion Regulation? A Retrospective Study, Joseph P. Berry

Masters Theses

Childhood sibling aggression and its influence on an individual's ability to regulate emotions later in life have not been extensively studied at this point in time. Prior research indicates that repeatedly being the victim of childhood aggression can lead to concurrent social, psychological, and emotional difficulties (Crick, Bigbee, & Howes, 1996). This study used a retrospective approach to explore whether 139 college students' experiences of overt and relational childhood sibling aggression are related to current difficulties with emotion regulation in young adulthood. Overt sibling aggression or relational sibling aggression in childhood predicted difficulties in current emotion regulation. Beliefs about the …

Exploring The Relationship Between Self-Reported Religiosity And Alcohol Usage Among Undergraduate Students, Angelica Maria Bradley

Masters Theses

Alcohol usage is one of the greatest high-risk behaviors that institutions face today. In this study, 166 undergraduates were surveyed to explore the relationship between their religiosity and alcohol usage. The data revealed that religious students drink less than unsure or spiritual students, supporting the Social Identity Theory, which suggests that a group a student most identifies with influences them the greatest. The study also suggests that we should seek to understand this relationship, which can lead to a better understanding of why students use alcohol, and therefore, a step closer to helping them succeed where it matters most.

Grief, Loss And Stress Burden Among Spouse Caregivers Of The Person With Young-Onset Dementia, Sharbari Ganguly

Masters Theses

The effects of young/early-onset dementia are devastating not only for the person who has been diagnosed with young/early-onset dementia, but also for their primary caregivers (de Vugt & Verhey, 2013). The major aim of this study is to focus on the level of grief, loss, and stress burden that are associated with the partner or the spouse caregivers of someone with young-onset dementia. This study has used a previously unanalyzed set of data consisting of 55 partner or spouse young-onset dementia caregivers. Three instruments were used for data collection including the Marwit-Meuser Caregiver Grief Inventory (MMCGI), the Zarit Burden Interview …

Sexual And Political Affairs: Representation Of Women In American News Media, Melissa Beal

Masters Theses

Explores representations in American news media of women who have been involved sexually with male politicians and women who are politicians through a critical rhetorical lens. Through the use of poststructural feminism, the term "mistress" is problematized. Attention is given to the news media's focus on women's bodies as sites of dangerous sexual temptations as well as the media's constant attention to women's physical features, which reduces women to objects. It is shown that similar coverage regarding bodies is not given to men. Also discusses the news media's frequent interrogation of women's minds. Explores aspects of confession and apology through …

Methods Development In Biological Mass Spectrometry: Application In Glycoproteomics, Sanja Trajkovic

Theses and Dissertations--Chemistry

Proteomics refers to global characterization of the full set of proteins present in a biological sample. Various analytical disciplines contribute to proteomics but mass spectrometry became method of choice for analysis of complex protein samples.

Mass spectrometry allows for high throughput analysis of the proteome but, moreover, it has the ability to acquire higher-order information such as post-translational modifications (PTM). Glycosylation is the most abundant PTM on eukaryotic proteins.

This dissertation will focus on method development for structural proteomics that will be utilized to explain the glycoproteome of obligate intracellular protozoan parasite Toxoplasma gondii as a model system.

Optimization of …

Assessing Social Problem Solving And Frustration Tolerance In Early Elementary Students, Catherine G. Wang

Graduate Research Theses & Dissertations

Due to the current national discourse on the social and emotional well-being of our youth, the examination of student progress and development in the area of social and emotional skills is a critical area of study. To date, limited research on social and emotional skill development in schools has been conducted. In addition, there is little documented research on the direct assessment of student skills in the specific social and emotional learning competencies. With the emergence of a new assessment tool from Rush NeuroBehavioral Center (RNBC), schools are now able to gather performance based student assessment data in key areas …

Assessing Social And Emotional Skill Development In Early Elementary Students, David K. Rongey

Graduate Research Theses & Dissertations

Due to the current national discourse on the social and emotional well-being of our students, the examination of student progress and development in the area of social and emotional skills is a critical area of study. To date, limited research has been conducted in this area. For example, there is little documented research on the direct assessment of student skills in the specific social and emotional learning competencies. With the emergence of a new assessment tool from Rush NeuroBehavioral Center (RNBC), schools are now able to gather performance based student assessment data in key areas of social emotional skill development. …

"Unseen And Unheard" : Representations Of Mental Illness In Contemporary American Immigrant Literature, Ellen D. Stuart

Graduate Research Theses & Dissertations

Focusing on two novels, Wendy Law-Yone's The Coffin Tree and Julia Alvarez's How the Garcia Girls Lost Their Accents, this analysis employs a framework drawn from research on mental health, which recognizes the cumulative impact of the immigrant's experiences through the process of migration on his/her development of mental illness by dividing migration into three stages: pre-migration, peri-migration, and post-migration. Because each stage carries its own set of factors potentially increasing the immigrant's vulnerability to mental illness, the experiences of the individual characters during the stages of migration are examined, as are their experiences of specific mental illnesses. Reading immigrant …

A (Re)Conception Of The City : Commercialization, Domestication, And Resistance In New York City From Melville To Mckay, James Baltrum

Graduate Research Theses & Dissertations

This dissertation characterizes the historical changes that shaped nineteenth and twentieth century New York City by examining how Herman Melville, Stephen Crane, Edith Wharton, John Dos Passos, and Claude McKay expressed these changes in their literary works. I employ the ideological principles of scholars such as Henri Lefebvre, who viewed physical spaces including the modern city as socially constructed products, and the methodology of writers such as Michel Foucault, whose genealogical approach prompts an open-ended and multi-faceted analysis. Consequently, my argument shows how various economic, social, cultural, political, and technological developments worked with and against each other to shape (and …

Altering Shyness Mindset : Enhancing Treatment For Social Performance Anxiety, Michael J. Gillen

Graduate Research Theses & Dissertations

The current study looked to extend previous research on the meta-cognitive variable of shyness mindset. The objectives were to demonstrate the ability to promote an incremental view of shyness in a clinical population, provide evidence for this change's ability to enhance the reduction of social performance anxiety symptoms via exposure therapy, and elucidate the possible mechanisms involved. Participants were recruited from an intensive outpatient program for the treatment of anxiety disorders, and assigned to either receive an intervention designed to alter shyness mindset, or treatment as usual. Results indicated that shyness mindset was malleable in a clinical population. The effect …

Exploring Faculty Beliefs Regarding Teaching African American Freshmen To Interpret Social Cues At A Minority-Serving Institution, Concetta A. Williams

Graduate Research Theses & Dissertations

Through the use of critical qualitative methodology, this dissertation explored faculty beliefs at an urban, minority-serving institution regarding the ability of African American first-time, full-time freshmen to interpret social cues in higher education contexts. Specifically, this study examined [1] faculty-student interaction as a process of socialization for students and [2] how faculty members teach students to interpret or read social cues as they relate to higher education contexts. The definition of literacy is considered in broad terms as a transaction between a reader and either the spoken word or a given context (verbal and nonverbal).||This examination found that participants: [1] …

Exploring The Link Between Attribution Biases And Aggressive Behavior Among Adolescents : Are Parents' Attributions And Management Of Peers Contributing Factors?, Haeli Gerardy

Graduate Research Theses & Dissertations

The current thesis project investigated two parental influences on adolescents' hostile intent attributions and aggression - mothers' hostile intent attributions regarding adolescents' peers and management of peer relationships. Consistent with the small literature on parent-child concordance of hostile attributions, mothers' instrumental hostile intent attributions (IHIAs) were related in a positive fashion to adolescents' hostile attributions about peers in the same scenarios. Findings were the first among a sample of mothers and adolescents older than fifth grade. There was some evidence for an interactive effect of mothers' instrumental hostile attributions on higher levels of boys', but not girls', overt aggression. Mothers' …