Digital Commons Network^™

Building And Optimizing A Spectroelectrochemical System For The Study Of Shewanella Putrefaciens, Jonathan Muscolino

Master's Theses

Shewanellaceae are among the most widely studied electroactive microorganisms. This study reports on Shewanella putrefaciens under anaerobic conditions during applied potential while monitored by spectroscopy. The attachment of the microbe Shewanella putrefaciens onto an indium tin oxide electrode was found to occur after 2 hr of +0.2 V applied potential. Microbial detachment occurred with a 5 mV/s scan rate cyclic voltammogram from +0.2 V to -0.5 V to +0.2 V. This was confirmed through use of a spectroelectrochemical apparatus utilizing a standard 3 electrode setup with evanescent wave spectroscopy.

Prevalence And Diversity Of The Haemosporidian Blood Parasite Leucocytozoon In Sub-Saharan African Birds, Heather Skeen

Master's Theses

Our knowledge of avian Haemosporidian parasites has increased dramatically with the advent and increased used of molecular technologies. Yet Leucocytozoon, a common avian parasite, remains relatively understudied. Haemosporidian parasite diversity and prevalence has been shown to be dependent on several factors, including host family and habitat, on a microecological scale. In this study I screened 3,375 birds from sub-Saharan Africa for the presence of Leucocytozoon and demonstrate that the patterns of prevalence and diversity continue at a macroecological scale. Using molecular data, I found that the prevalence of Leucocytozoon varied between sampling areas from 3.9% to 62.64% and the diversity …

An Qualitative Study Of The Meaning High School Students Ascribe To Occult Media Consumption, Jalisha Tolbert

Master's Theses

This qualitative research design explored how high school students ascribe meaning to occult media in pop culture, and it explore possible effects of occult consumption impacting their life aspirations. The research conducted at a high school located on the west side of Chicago, Illinois with a sample size of 10 students from the eleventh grade. First, an exploratory assessment will show how youth ascribe meaning to occult media consumption, and in turn, qualitative interviews presented whether it imposed any effects on life aspirations. The qualitative methods included a qualitative interview, where the researcher asked each participant to explore the meaning …

Global Human Trafficking: New Insights On An Old Crime, Joanna Surma

Master's Theses

Thousands of men, women, and children become victims to human trafficking each year. Almost every country in the world is affected by this heinous crime. Human trafficking exists in many different forms including sexual exploitation, slavery, forced labor or servitude, the removal of organs, child soldiers, etc. Despite the age-old practice being traced back to the 13th century, it continues to exist and even grow today. Unfortunately, not much research is available on the topic. Combating human trafficking is a growing priority for many governments; however, certain obstacles to data collection and analysis continue to exist. Recently, a new study …

Grit In The Classroom, David Anthony Vaughn

Master's Theses

In the United States today, educational opportunity is not equally distributed. Statistical data show a persistent educational achievement gap that disproportionately affects students of color or with a low socioeconomic status. There have been countless efforts to reform this inequality within the American school system; however, many efforts have ignored underlying issues regarding power structures and may instead be rooted in the biased beliefs of dominant culture. Knowledge is Power Program (KIPP) Public Charter Schools, in particular, emphasize seven character strengths that are intended to promote success for their students and bring them to and through college. Such traits may …

Predicting Suitable Habitat Decline Of Midwestern United States Amphibians And Quantifying The Consequence Of Declines Using Pond-Breeding Salamanders, Brock Struecker

Master's Theses

With current declines of vertebrate taxa meeting or exceeding those of historic mass extinction events, there is a growing need to investigate the main drivers of declines. Amphibians are perhaps at greatest risk of global climate change and land-use changes than most other vertebrate classes and also have significant roles in ecosystem processes – combined, this creates a cause for concern. I designed a study that would investigate the effects of current and predicted climate change and land-use changes on amphibians using species distribution models and a field study to identify the potential consequences of amphibian species declines by investigating …

Haitian Representation In The Media: A Comparative Analysis Between An African American Owned Newspaper And A Mainstream Newspaper, Stephanie Jean-Baptiste

Master's Theses

Are the portrayals of Haitian immigrants in an African-American owned newspaper, different from their portrayal in a white owned newspaper? In this paper I examine newspaper articles covering Haitian immigrants and refugees. The articles selected were published in 2004 and sampled from the Chicago Tribune and the Chicago Defender. Although the journals have distinctive goals and market reach, there were similarities in their portrayal of Haitian immigrants. Both journals referred to Haitian immigrants as victims of Haiti’s failed democracy. However, each journal advertised the reception of this migrant group differently. The African American owned newspaper advertised inclusion, while the white-owned …

Waiting On You: A Study Of Tipped Minimum Wages' Effects On Job Tenure Among White Restaurant Servers, John Henry Sienkiewicz

Master's Theses

Many restaurant servers do not make adequate earnings under the current tipped wage system in America. On top of this, restaurant servers largely lack benefits such as paid sick days and health insurance. Unsurprisingly, those in the food and accommodation industry exhibit among the highest rates of voluntary turnover. As research has shown that raising the non-tipped, standard minimum wage decreases employee turnover and increases overall job tenure, it follows that increases in the tipped minimum wage may increase job tenure for restaurant servers. Using survey data from nearly 1700 white restaurant servers from 2006, this multiple regression analysis shows …

Lactobacillus Crispatus Produces A Bacteridical Molecule That Kills Uropathogenic E. Coli, Katherine Diebel

Master's Theses

As many as 1 in 2 women will have at least one urinary tract infection (UTI) in their lifetime. UTIs can cause complications in pregnancy and decrease quality of life, and their treatment and prevention are expensive. Uropathogenic E. coli (UPEC) is the primary cause of UTI. The probiotic and bactericidal capacities of gut and vaginal Lactobacillus isolates have been studied, but the same attention has not been paid to urinary strains. These urinary isolates of L. crispatus appear to have a greater killing capacity against UPEC and this bactericidal activity does not depend on the cells themselves, consistent with …

Investigation Of A Ubiquitous Spore Surface Protein, Justyna Kordzikowska

Master's Theses

All bacterial spores are comprised of concentric shells. All spores are encased in a layer called the coat. Some spores have an additional layer outside of the coat called the exosporium. Presumably, this morphological variation is an adaptation to variation in the environments in which these species can be found. However, spores from species with and without exosporia can often be found in the same niche. We hypothesize, therefore, that spores with and without exosporia share a common surface protein. Bacillus anthracis possess a well characterized surface protein called BclA. A BclA homologue is also present on the surface of …

Characterization Of Il-22-Producing Cells In The Human Thymus And The Mechanism By Which Il-22 Expression Is Modulated By Thymic Epithelial Cells., Nadine N. Morgan

Master's Theses

Thymic epithelial cells (TECs) are indispensable for T cell development and maturation. Therefore, damages to the thymic epithelial cells are detrimental to thymic function and immune response. In young healthy individuals, TECs have a high regenerative potential and are capable of renewal from serious damage; however, the molecular mechanism of this recovery is unclear. A recent study has shown that IL-22-producing ILCs are present in the mouse thymus and can regenerate thymic epithelial cells following radiation induced injuries. However, it is unknown whether IL-22-producing cells are also found in the human thymus. Thus, the goal of this study is to …

Summertime Sleep And Bmi In Urban Minority Girls: Relations To Physical Activity And Executive Functions, Carolyn Rose Bates

Master's Theses

Urban minority youth, particularly females, are at high risk for increased weight gain during the summertime months, and may also experience insufficient sleep at this time. Few studies have objectively measured summertime sleep in this population or related sleep to weight gain during this season. The current study draws on a sample of 66 urban minority girls aged 10-to-14 who participated in a community-based summer day camp program promoting physical activity (PA). The study objectively characterizes sleep in this sample, both in unstructured and structured contexts. Additionally, the study examines potential pathways underlying summertime relations between sleep and weight, including …

Maimonides And Spinoza: Biblical Interpretation, Randi Feder

Master's Theses

This paper focuses on Maimonides’ The Guide of the Perplexed and Spinoza’s Theological‐Political Treatise and their divergent answers to the question as to whether the knowledge acquired through reason alone can be reconciled with Scripture’s content and teachings. Both Maimonides and Spinoza believed that the true understanding of what the Bible says could be achieved by the correct method of biblical interpretation. I show that despite approaching the question of philosophy’s relationship to religion in a similar way, their very different answers are readily understandable in light of each author’s pre‐existing philosophical and religious commitments. The Guide, published in 1190, …

Tracking German Education: An Examination Of Three Postwar Periods, Jennifer Hart

Master's Theses

This study examines tracking policies in the German education system in three pivotal postwar time periods in order to learn more about the system of tracking in German schools and how it has evolved and changed over time. I specifically seek to answer this research question: How were tracking policies in the German education system reshaped or addressed in education reforms after the end of World War I, World War II, and post-reunification? This is a historical study; thus, the data I collected came from a variety of primary and secondary sources relevant to the subject with the aim of …

Feminist And Gay Male Politics: New Issues For Political Collaboration And Activism, Adam Hii

Master's Theses

This project looks at political collaboration between people who self-identify as gay men

and those who self-identify as feminists. These two groups have been political aligned on numerous issues since the 1970s. The goal of this project is to see on which issues that political collaboration will continue moving forward. This research draws extensively on oral interviews conducted with gay men and feminists, as well as the current work of national advocacy organizations to see where political interest is high, and where networks already exist to foster future advocacy efforts. By focusing on these areas, this project predicts which issues …

Early Round Goby (Neogobius Melanostomus) Invasion Into Lake Michigan Tributaries And Competitive Interactions With Two Native Benthic Fishes., Margaret Ann Malone

Master's Theses

The round goby is a prolific invasive species and is currently spreading into Great Lake tributary streams. There is a high potential for negative impacts on native benthic fishes in these stream habitats and the aim of this study is to assess the impacts of the round goby on two native darter species in particular (johnny darter and blackside darter). I review the history of round goby invasion in the Great Lakes and summarize hypotheses of the invasive characters of the round goby. Using game theory, I provide a G-function approach to understanding the outcomes of the round goby invasion …

Investigating The Regulatory Mechanisms By Which Arabinose And Sypa Control Biofilm Formation In Vibrio Fischeri, Sheila Paris

Master's Theses

Biofilms are surface-associated microbial communities surrounded by an extracellular matrix. Through biofilm formation, many pathogens and symbionts are able to colonize, survive, and persist in their host. A model system used to study biofilm formation is the symbiotic bacterium Vibrio fischeri, which colonizes its host, the squid Euprymna scolopes. Complex signaling between the squid and the bacteria is essential for the proper regulation of biofilm formation as well as for persistent colonization.

The signal(s) that promote host-relevant biofilm formation are as-yet unknown, but recently it was discovered that the sugar, L-arabinose, serves as a unique signal to promote biofilm formation …

Becoming Adults: Trajectories Of Adult Identity Development Among Undergraduate Students With Implications For Mental Health, Jenna Shapiro

Master's Theses

One of the defining developmental processes that occur during the unique stage of emerging adulthood is the emergence of adult identity, or the subjective sense of adulthood. Adult identity has been hypothesized to grow gradually, linearly, and at different rates for subgroups of individuals over the course of this stage (Arnett, 2006; Côté, 2006). Differences have also been suggested to predict wellbeing and distress (Côté, 2006; Kroger, 1996; Kroger, Martinussen, & Marcia, 2010). The goals of the current study were to examine heterogeneity in adult identity development over four years in college and to examine differences in self-esteem and negative …

Phosphodiesterase Inhibition As A Mechanism Of Ion Channel Modulation By Celecoxib, Christina Jean Robakowski

Master's Theses

The overall objective of this thesis work is to determine the mechanism by which celecoxib modulates Kv7 potassium channels in vascular smooth muscle cells. The central hypothesis of the project is that celecoxib modulates Kv7 potassium channels in vascular smooth muscle cells through inhibition of phosphodiesterase 4 (PDE4, which catalyzes the breakdown of cyclic adenosine monophosphate (cAMP)), thereby activating a cAMP/protein kinase A (PKA) signaling pathway. The aims of this thesis targeted different points in the cAMP/PKA pathway with pharmacological interventions using whole cell perforated patch clamp electrophysiology and biochemical methods.

The data suggest multiple mechanisms by which celecoxib could …

Examining The Effects Of Coping Strategies Specific To Community Violence Exposure Among African American Adolescents, Suzanna So

Master's Theses

Variability in exposure to community violence (ECV) and aggressive behaviors in African American youth from urban communities can be attributed to general coping, but these studies have been inconclusive. Recent qualitative research identified four types of coping that are specific to ECV; however, quantitative research is needed to understand the adaptiveness of these strategies. The current study examined the factor structure of a measure for ECV-specific coping strategies. The current study also assessed how ECV-specific coping was associated with ECV and externalizing behaviors. Data from the current study were derived from an archival dataset comprised of 594 African American adolescents. …

Risk And Resilience Factors Among Low-Income Latino Adolescents: The Impact On Daily Ratings Of Mood, Stephanie Andrea Torres

Master's Theses

Given that Latino adolescents endorse more negative mood when compared to their counterparts of other backgrounds (CDC, 2012), it is especially advantageous to evaluate the impact of risk and resilience factors on mood among this population. The current study uses daily diary methodology to examine the impact that daily economic stress, daily family stress, familism, and ethnic identity commitment and exploration have on daily ratings of mood among 58 (M =13.31, 47% female) low-income Latino adolescents. Results show that daily family stress was strongly linked to daily mood while familism emerged as a salient resilience factor. Contrary to predictions, ethnic …

The Moderating Role Of Emotion Regulation On Longitudinal Associations Between Stress And Mental Health In College Students, Evan Zahniser

Master's Theses

Emotion regulation is consistently linked to subsequent wellbeing, but little research has examined the moderating role of emotion regulation in associations between mental health and other relevant factors. Patterns of gender differences in emotion regulation also remain somewhat unclear. The present study targets these gaps by examining two specific emotion regulation strategies in interaction with stress and gender in predicting internalizing symptoms among college students, a population for whom emotion regulation may be particularly important given the high-stress nature of the college transition. A large sample of students (N = 1,130) provided self-report data at three time points over their …

The Role Of C-Abl Kinase In Hcc Development, Lennox Chitsike

Master's Theses

Hepatocellular Carcinoma is the second most lethal cancer after pancreatic cancer. Unresectable HCC tumors carry a poor prognosis and few treatment options are available. The dismal prognosis is mainly due to limited therapy options and molecularly targeted therapy is deemed as solution. Here, we report a novel role of c-Abl in HCC development. We provide evidence of c-Abl activation in human HCC samples compared to normal liver. Using genetic and pharmacological tools, we show that c-Abl plays a vital role in HCC progression in vitro and in vivo. We have identified Axl as an effector in processes mediated by c-Abl. …

La Transformación Espiritual En "Las Lágrimas De La Magdalena" De Lope De Vega, Cristina Codina

Master's Theses

El presente trabajo de investigación explora los recursos que utiliza Lope de Vega para describir la transformación espiritual de María Magdalena. El poema “Las lágrimas de la Magdalena” pertenece a la poesía religiosa que Lope de Vega cultivó en las Rimas Sacras. De acuerdo a Antonio Carreño y Antonio Sánchez, el poema describe una metamorfosis mística por parte de la pecadora arrepentida. En mi trabajo voy a explorar la relación entre el proceso de transformación de María Magdalena y la construcción simbólica en el poema de varios espacios con sentido místico. La transformación espiritual constituye el tema central de este …

Influence Of Metaphoric Language On Juror Decision Making, Melissa Michelle David

Master's Theses

This paper examines the effects of metaphoric language on judgment, assessment and juror verdict decision making. It further examines potential interactions between the use of figurative language and defendant race on juror verdict decisions. Research has potential implications on how the recent cultural climate has changed racial biases within the realm of juror decision making.

Cellular Consequences Of Lysosomal Rupture Induced By Alpha Synuclein, Zachary Carpenter Green

Master's Theses

Misfolded, toxic forms of amyloid alpha synuclein (α-syn) have been implicated in Parkinson’s disease (PD) pathology and have been shown to spread throughout the brain in a prion-like manner, explaining the progressive loss of neurons in PD. The mechanisms of spread and cell death are unknown, however, evidence from previous studies suggests that neurons may undergo apoptosis due to the uptake of exogenous α-syn aggregate through the endocytic pathway and subsequent lysosomal rupture.

This study aimed to corroborate previous evidence of α-syn induced lysosomal rupture and investigate the cellular repercussions of rupture with respect to cell death and α-syn transfer. …

Understanding Academic Achievement Among Low-Income, Urban, Black Adolescents: The Role Of Father Involvement, Patrick Henry

Master's Theses

Although the Black-White test score gap has improved over time, it still persists. Furthermore, this academic risk for Black youth is compounded by the disproportionate representation of Blacks among low-income families in the U.S. Thus, the present study aims to shed light on factors related to greater academic success among adolescents in low-income, urban, Black families. Overall, this study addresses the following question. How does the presence of a biological father and positive father involvement impact the academic achievement of their adolescent children? Data from the Welfare, Children, and Families: A Three-City Study (TCS) were analyzed in order to address …

Assessing The Success Of Outreach At Preventing The Movement Of Aquatic Invasive Species In Illinois, Ellen Anne Cole

Master's Theses

Overland transport of recreational boats is the major vector of dispersal for aquatic invasive species among North American waterbodies. These species have large economic and ecosystem impacts, and understanding their movement is essential to understanding the biodiversity and functioning of aquatic ecosystems across the continent. I surveyed Illinois boaters to determine patterns of recreational boat movement and the consistency with which boaters perform actions to prevent the spread of invasive species. Although most boaters perform these actions, a large minority do not and the network for invasive species spread on recreational boats still connects most waterbodies. Next, I interviewed managers …

Common Core For Social Justice?: Arendtian Critical Thinking And The Common Core State Standards, Chandler Bain Meyer

Master's Theses

Through Hannah Arendt’s inspection of Adolf Eichmann, her studies of Kant’s political philosophy, and Life of the Mind she examines what it means to think critically and deconstructs the taken-for-granted action of thought. This paper is premised by the same guiding question as Arendt asks herself: Could thinking be a condition that makes people abstain from committing injustice or be conditioned against it? Arendt, clearly building on Kant, certainly thought it is probable; suggesting that Eichmann was not purely wicked or laced with stupidity, but the “macabre comedy” he landed a starring role in was a result of simple thoughtlessness. …

Use Of Youth Program Quality Assessment (Ypqa) As A Method Of Process Evaluation: Maximizing Limited Resources Of Nonprofit Organizations, Young Im

Master's Theses

Past literature shows the progression of different phases of evaluation practice in nonprofit organizations. Pressure of outcome or impact evaluation started the beginning of the 21st century. The attempt to manage the weight of conducting outcome evaluation has raised many complications, inhibiting the nonprofit organization’s ability to learn and understand the proper role of evaluation and what it can provide to assist in improving programs. It, therefore, has led to a gap in which nonprofits miss what happens during implementation, a crucial part of process evaluation. Among nonprofit organizations in the areas of youth development and after-school programs, various types …