Digital Commons Network^™

Biodiversity And Ecosystem Function And The Design Of Tallgrass Restorations For Biomass Production, Dustin Robert Jon Graham

Dissertations and Theses @ UNI

Biodiversity and ecosystem function research (BEF) suggests species richness may provide high levels of ecosystem functions. However, few studies have applied a BEF perspective of restoration, which utilizes biodiversity to achieve increases in ecosystem functions. In this study, we test the application of the BEF perspective of restoration in the design of tallgrass prairie plantings as a biomass crops. Specifically, we examine the effects of planted species richness on biomass production, resistance to disturbance, and resistance to invasion by weeds.

Four seed mixes which range in species richness (1, 5, 16 and 32 species) were established in four, field-scale (0.33-0.55 …

A Comparison Of The Effects Of Burning, Haying And Mowing On Plants And Small Mammals In A Tallgrass Prairie Reconstruction, Ryan Allan Neuhaus

Dissertations and Theses @ UNI

Fire is an effective management tool for reconstructed prairies. However, due to safety concerns, road departments and other prairie managers are sometimes reluctant to use fire. Therefore, alternative techniques to manage reconstructed prairie, such as mowing or haying, need to be considered. The goal of this study is to determine if mowing and/or haying can be used to manage vegetation in lieu of fire for prairie reconstructions. This study examines the effects of four management techniques on plant and small mammal species in a tallgrass prairie reconstruction. No management, mowing, haying, and burning were replicated six times using a split …

Reconciling The Two Cultures : A Case Study Of The University Of Northern Iowa, Elizabeth Ann Collins

Dissertations and Theses @ UNI

In 1959, chemist and author Charles Percy Snow gave a Rede Lecture at the University of Cambridge in which he named “Two Cultures”—the sciences and the humanities—which, according to his experience as someone who worked in both, were at odds with one another. His words elicited impassioned responses from critics who either agreed with Snow, believing this to be a detriment to society, or vehemently disagreed, believing Snow’s statements to be unfounded, and even antagonistic. This conversation, which had also found relevance in the United States, continues to be important today, and has changed over the years as institutions of …

Variation In Mineral Content Of Prairie Forb Species And Content Changes Over Winter Related To Slagging Potential, Jennifer Nyla Wahl Rupp

Dissertations and Theses @ UNI

Coal fired power plants are responsible for more than 75 percent of the energy produced in Iowa. Burning coal releases large amount of carbon dioxide and other chemical compounds into the atmosphere.

A variety of types of biomass, including prairie vegetation, are being proposed as biofuel alternatives for electrical generation. Tilman et al. (2006) determined that biofuels from mixtures of prairie vegetation of increasing diversity provide more usable energy, reduce greenhouse gases and produce less agriculture pollutants. The Prairie Power Project of the Tallgrass Prairie Center is testing four mixtures of prairie species for maximum production of biomass. A primary …

In Connection With All Things : The Memory Of Alexander Humboldt And His Works In The Context Of 19th Century Thought In Europe And America, Ray Joseph Werner

Dissertations and Theses @ UNI

This thesis explores the memory of Alexander von Humboldt, the explorer and philosopher who was known for his travels throughout Europe, Asia, South America, and North America. This paper will examine primary and secondary sources throughout the 19^th and 20^th centuries that mark a change in just how Humboldt was remembered, once as a great thinker, philosopher, and romanticist, then eventually as little more than an empirical scientist. This thesis will contribute to modern understandings of this man by looking at popular publications and writings that track this change over time. It will contribute to the modern understanding …

A Model For Measuring The Contribution Of Form To Perception Of Biological Sex In Point-Light Actors, Michael Mintz

Dissertations and Theses @ UNI

People are able to judge the sex of actors represented in point-light displays. Much of the previous literature has focused on the contribution of motion information to this judgment, or has focused specifically on information gathered from the shoulders and hips. The purpose of the current study is to model how form information, based upon the distance between the dots representing a point-light actor’s key joints, the shoulder, hip, elbow, knee, wrist, and ankle points, contributes to the perception of biological sex. In a pilot study, 6 naïve observers responded to 63 computer generated stimuli that ranged from extremely female …

Active Landing Velocity: "Pawing Motion", Erin Dean Blind

Graduate Research Papers

The significance of this study is to newly examine a factor of sprint performance. Previous studies have examined the limiting factor of vertical force of contact during a sprint. Studies have yet to look at the horizontal velocity of the foot with respect to the center of mass prior to contact in a sprint. This study will look at this horizontal velocity to examine if that is also a limiting factor during the sprint. Past studies have shown that vertical forces of sprinters are as big two to three times the body weight during a sprint then when trying to …

Understanding By Design Unit Lesson Plans For The Next Generation Science Standards: Life Science, Arie Schiller

Graduate Research Papers

The project that I focused on for my Creative Component is the creation of Understanding by Design (UbD) unit lesson plans that address the Next Generation Science Standards (NGSS) in the topic of Evolution. When the final framework was released of the NGSS in 2011, the need for teachers to revisit and align their curriculum became a necessary step to ensure appropriate content was taught. In the fall of 2013, Keokuk Community School District decided science teachers would begin implementing the new NGSS, anticipating that the state of Iowa will adopt the standards.

This creative component includes lesson plans correlated …

The Inclusion Of Engineering Design Into The High School Biology Curriculum, Cody D. Lakose

Graduate Research Papers

The purpose of this project is to develop engineering-based lessons for a life science course,i.e. biology, in order to meet the NGSS standards as well as increase student interest in engineering by incorporating the principles of engineering design into the traditional science classroom.

Examining Variations In Technology Use For K-12 Students Of Different Gender And Socioeconomic Status, Nikki Lyons

Graduate Research Papers

The purpose of this paper is to review the literature currently published on how members of different genders and socioeconomic classes use technology to suit their needs in and out of the classroom learning environment. It will focus on the use of digital technologies by students in elementary, middle, and high schools. This was done by examining 30 research-based, peer-reviewed journal articles, books, published papers, documents, and observational analyses. The research indicates there are clear differences in how members of different subpopulations such as gender and socioeconomic groups choose to use technology to suit their communication, collaboration, instructional, and entertainment …

The Dual Role Of Self-Enhancement : Protection And Stigma, Corina Evelyn Klein

Dissertations and Theses @ UNI

Despite the availability of effective treatment options for posttraumatic stress disorder (PTSD), these treatments are highly under-utilized. One of the most cited barriers to treatment among people with PTSD symptoms is public stigma. In fact, the majority of the population experiences a potentially traumatic event (PTE) in their lifetime and should contribute to an assumption of a lack of stigma toward people with PTSD symptoms. Yet, it may be that the stigma perceived by people with PTSD symptoms is more nuanced than what is seen in stigma for other disorders. More often than not, people who experience a PTE will …

Butterfly And Floral Community Dynamics At A Native Prairie Agrofuel Research Site, Benjamin J. Hoksch

Dissertations and Theses @ UNI

Agrofuel production in the Midwest has historically relied upon monoculture food crops (Zea mays and Glycine max) that do little to support biodiversity or maintain soil and water quality. The University of Northern Iowa’s Tallgrass Prairie Center is investigating the feasibility of establishing and harvesting diverse mixes of native prairie vegetation for use as a sustainable agrofuel. In 2009 48 research plots were established on three soil types, on land with a >30 year history of row crop production in Black Hawk County, IA. Each plot was seeded with one of four native prairie agrofuel crops: (1) Switchgrass1, (2) Grasses5 …

Caged Manhood : Office Culture And How Walter Camp's Daily Dozen Revitalized The Workforce, 1903-1940, Nick Sly

Dissertations and Theses @ UNI

This thesis is examines how culture became a means to deal with the problems of over-civilization in the early twentieth century. The realities of a salaried position and corporate work spaces had dramatically changed how the middle class felt about work. Looking at the writings of Walter Camp, the human relations movement, and the exercise culture of the period one can see how the office space was not simply a place of work but a new context for constructing masculinity and a sense of worth.

Perceived Relational Evaluation : Biological, Psychological, And Physical Health Correlates, Emily Christina Banitt

Dissertations and Theses @ UNI

Humans have a fundamental need to belong, and being rejected or devalued elicits strong emotional reactions such as stress and anxiety (Leary, 2001). Low perceived relational evaluation (PRE), as a type of rejection, occurs when one person in a relationship believes his or her significant other does not regard his or her bond with the other person as valuable, close, or important (Leary, 2001). The goal of the research was to examine the interrelations among PRE, cortisol (biological stress), relationship quality, and physical and psychological within dating couples. Undergraduate female students (N = 109) who were involved in dating relationships …

Biblical Literalism And The Acceptance Of Biological Evolution In Christian University Students, Heather N. Chamberlain

Dissertations and Theses @ UNI

Is it possible to accept biological evolution without rejecting God? Understanding student perspectives about religious belief and biological evolution is important to effectively teach science. There are many factors in this complex relationship and this study explored three: differences in Christian denominations, interpretation of scripture, and perspectives of the relationship between religious belief with acceptance of evolution. The participants were freshman elementary education majors at a Midwest university who completed a questionnaire about religious beliefs and the Inventory of Student Evolution Acceptance (I-SEA).

The results indicated no significant difference between Christian denomination and acceptance of evolution. Participants who took the …

Suggestions For Transgender Inclusion In Classical Music: A Mini-Cycle, Xavia A. Publius

Dissertations and Theses @ UNI

This interdisciplinary text examines the lack of transgender inclusion in Western classical music, especially through the lens of opera. By looking at the dearth of transgender characters, singers, and composers, as well as the author’s personal experiences as a transgender singer in classical spaces, this project develops a strong position on ways that Western classical music should work to incorporate transgender voices, both literally and figuratively.

Some of these methods are modeled in this thesis, such as consultations with other transgender artists, transgeneric devising, and trans-centric composing. The author worked with local transgender singers to understand their views on opera, …

The Effects Of Hibernation On The Hemostatic Properties Of The American Bullfrog, Rana Catesbeiana, Kiana Cullinan

Honors Program Theses

It is known that hibernating animals display a drastic reduction in metabolic rate, accompanied by reduced heart rate and rate of blood flow through vessels. Sluggish blood flow increases the risk for developing clots, yet it has been observed that hibernators conclusively display elongated clotting times. This observed impairment may be caused by the decrease in body temperature, due to a negative impact on the functioning of the enzymes involved in coagulation. Some hibernating endotherms, or “warm-blooded” animals, employ biological mechanisms as preventative means to prevent clotting during hibernation, such as the down-regulation of certain clotting factors or the production …

The Analysis Of Diruthenium Compounds On Human Cells As Potential Chemotherapeutic Agents, Elizabeth Mcculloch

Honors Program Theses

Chemotherapy is a common method of cancer treatment, and cisplatin is a common anticancer compound used in chemotherapy. While effective, cisplatin is known to cause many side effects, and people can form resistance to it. Because of these problems, new chemotherapeutic compounds are needed. One compound that has shown anticancer properties, an ability to overcome resistance, and nontoxicity is ruthenium. Multiple mono-ruthenium compounds have been previously studied and were found to be effective. The current research project synthesized a diruthenium compound Cp₂Ru₂(bipy)₂(DMSO)₂ and exposed the compound to human liver cells (HepG2) to determine …

Effects Of Atp And Atp Inhibitors On The P2x7 Receptor, Holly Marie Salzbrenner

Honors Program Theses

Extracellular ATP has been shown to increase the permeability of cells via the P2X7 receptor. This relationship could be important in understanding the physiology of the inflammation that occurs in bovine respiratory disease complex (BRDC). My research involved testing to see if this relationship between ATP and the P2X7 receptor is present. Then, potential inhibitors of ATP were tested so they can be used in further research involving ATP and BRDC. To test bovine cells, Mac-T cells were treated with ATP and incubated for various periods of time before Yo-Pro (a fluorescent molecule) was added. The percent change in fluorescence …

Functional Analysis Of Drought-Resistant Genes In Barley Using Vigs, Natalie Catherine Martin

Honors Program Theses

The following study analyzed the role of the gamma-aminobutyric acid transaminase (GABAT) gene in the response of barley plants to drought stress. Expression of GABAT in barley was suppressed using virus-induced gene silencing (VIGS). In VIGS, an RNA virus is used to replicate a small portion of the target RNA. In this study, barley stripe mosaic virus (BSMV), that carries a piece of the GABAT gene to infect barley, was used. As the virus replicates inside infected barley plants, it also makes RNA that is complementary to GABAT messenger RNA (mRNA) that is normally made by the host. The presence …

Analysis Of Protein Expression For Potential Biomarkers In Human Pancreatic Tumor Cell Lines, Jade Ashley Simpson

Honors Program Theses

Pancreatic cancer is an aggressive cancer of the pancreas that has been shown to have extremely low survival rates. It can be quite lethal because of its asymptomatic early stages and inability to detect cancer at the cellular level. Once diagnosed, the cancer will have usually spread or metastasized beyond surgical resection. Thus, research is focused on finding potential biomarkers in tumor cell lines to help in earlier diagnosis of this disease leading to better treatment options. Previous work using bioinformatics data suggest several cellular genes including, CTHCR1, EPPK1, AHNAK2, and IGHG3, can be potential biomarkers for pancreatic cancer. The …

Above- And Belowground Biomass And Soil Respiration In A Low-Input Perennial Biofuel Production System, Jordan Young, Jessica Abernathy, Kenneth Elgersma

Undergraduate Student Work

Backgroud

• Global climate change largely depends on the atmospheric carbon balance, of which soil respiration is a significant component.
• Native perennial prairie vegetation is being tested as an alternative to corn for renewable biofuel production.
• Mixtures of this vegetation are considered ‘carbon negative’ because net CO2 sequestration exceeds atmospheric release¹.
• Studies have shown that aboveground biomass and the rate of carbon sequestration are both increased by planting a diverse mixture of species versus a monoculture¹.

Research Question:

How does the diversity of biofuel vegetation mixtures affect soil respiration, aboveground biomass and belowground biomass?

Analysis Of Ipomoea (Morning Glory) Leaf Mutants, Abigail Anne Lee

Honors Program Theses

Ipomoea (morning glory) is the largest genus in the family Convolvulaceae. Cultivation of morning glory plants began in the late Edo period in Japan, and this horticultural success resulted in thousands of plants with varying floral displays. In addition to the different flower morphologies, leaf shape is highly variable within this family making it an ideal group in which to study leaf development. We selected four mutants that vary in lobe number and lobe depth: 1) Tokyo Standard (TKS1065; wild-type; 3 lobes), yellow maple (ym1018; 5 lobes), delicate maple (dlm620; 5 deep lobes), and maple willow …

Losing Robin Williams: An Analysis Of User-Generated Twitter Content Following The Sudden Death Of A Celebrity, Samantha Mallow

Honors Program Theses

The purpose of my thesis is to examine how people use social media, in this case Twitter, to share content that reflects their attitudes toward the loss of a celebrity and the issue of mental illness. To complete my research, I examined how users of Twitter created content expressing their reactions to the sudden passing of comedian and actor Robin Williams on August 11, 2014. Williams’ death raised mental illness issues that he had faced during his life. After analyzing the data I created a short survey with eight tweets that referred to mental illness. The survey was administered to …

Finding Community: The Importance Of Intergroup Dialogue Within Diversity Workshops, Joslyn Nycole Aldape

Honors Program Theses

The number of students with diverse backgrounds has increased across universities and colleges nationwide. In fact, some institutions have hired Chief Diversity Officers. According to Jeffery L. Wilson, close to 150 institutions were a part of the National Association of Diversity Officers in Higher Education (NADOHE) in 2009 (433). As campuses experience an influx of new demographics, there is an increasing need to discuss diversity issues. The rapidity of this movement has created great conflict on college campuses, such as the hate crime incident that occurred at the University of Northern Iowa (UNI) in October 2014. Surrounding the application Yik …

Best Practices For Adoption Of An Inquiry Learning Model In K-5 Education, Michelle M. Kruse

Graduate Research Papers

This study describes best practices employed by successful teacher librarians in adopting and implementing an inquiry learning model within their schools and the obstacles overcome in doing so. It focuses on seven teacher librarians in the Grant Wood and Mississippi Bend Iowa Area Education Agencies who have completed their master's degrees or hold state licensure, and have at least one year of teaching experience. Participants took part in hour-long face-to-face, semi-structured interviews, and provided documentation of a lesson or a unit they have taught utilizing their school's inquiry learning model. After transcribing rich data from the interviews, the researcher coded …

Density And Diversity Of Bees In The Midwestern Agricultural Landscape: Influence Of Surrounding Agricultural Land Use And Biofuel Candidate Crops, Andrew J. Ridgway, Ai Wen, Kenneth Elgersma

Undergraduate Student Work

Recent trends in land management practices have led to dramatic population decline in bees and other insect pollinators (Cameron et al. 2011). Concerns about “Colony Collapse Disorder” in domestic honeybees, for example, have received widespread high-profile attention in the scientific community. While concerns have centered mainly on the domestic honeybee, native bees also provide indispensable, cost-free pollination services to crops production. Despite the value of native bee species, little is known about them in the Midwest region, and recent studies suggest their populations may be in decline specifically due to a lack of native vegetation in this highly agricultural landscape. …

Primer Efficacy In The Dna Barcoding Of Spiders, Rhennetta Jo Bork

Honors Program Theses

DNA barcoding is the process of amplifying a 650 base pair segment of the sequence of the mitochondrial gene cytochrome c oxidase (COI), and amplifying this gene with a polymerase chain reaction (PCR). It is used to help identify and distinguish animal species and also to help determine genetic differences in species. DNA barcoding can be especially useful when working with spiders since they tend to be very small and hard to distinguish. However, achieving a DNA barcode can be difficult and thus techniques to improve the method of DNA barcoding can be helpful. This research looked into the different …

Fall Commencement [Program], December 20, 2014, University Of Northern Iowa

UNI Commencement Programs

The program of the commencement ceremonies, including a list of institutional leadership, a list of the departments by college, awards given at the ceremonies, and a list of undergraduate and graduate degree candidates.

Stem Stories, December 2014, #3, Stefani Keller

STEM Stories

Program Spotlight - UNI STEM Student Organizations