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A Gravity Investigation Of The Tobacco Root Batholith Southwest Montana, Stephen Charles Tatum

Masters Theses

The objective of this research was to delineate and profile the Late Cretaceous Tobacco Root batholith in southwestern Montana through the application of the gravitational method. This survey was accomplished by obtaining 232 gravity measurements in four profiles across the batholith. After correcting for known variations in the gravity field, a Bouguer anomaly map of the batholith and surrounding host rocks was created. Four residual gravity profiles and map, created by subtracting the regional gravity from the Bouguer anomaly, reveal a maximum negative gravity anomaly in the center portion of the batholith which is parallel to the trend of the …

Naturally-Occurring Metals Concentrations In Michigan Soils: A 2015 Survey, Zachary Lowell Spotts

Masters Theses

Closure of hazardous waste sites can be aided through the use of a soil background survey for metals. Data for these studies come from either field sampling or publicly available environmental files. Previous studies were conducted in Michigan, known as the Michigan Background Soil Survey (MBSS). The current update is a refinement and improvement of the 2005 update. New data was collected from publicly available environmental files and other sources. Both the current update and the 2005 update differentiated data by soil type and glacial lobe. GIS analysis was used to observe spatial distribution of the data and to determine …

The Effects Of Nitrogen Availability And Competition On First Year Perrennial Bunchgrass Growth And Allocation, Jeffrey T. Walker

Masters Theses

Improving seedling survival of perennial bunchgrasses is a key goal of restoration programs in the Intermountain West. Two perennial bunchgrass species commonly used in restoration programs (Agropyron desertorum and Pseudoroegneria spicata) were exposed to two levels of N and competition treatments in a randomized complete block study in a pot study in eastern Oregon. I documented uptake, allocation and resorption of N in plants during the first year of growth. Agropyron desertorum had significantly higher rates of N uptake than P. spicata, but A. desertorum maintained lower tissue N concentrations, suggesting that P. spicata was more likely to …

Comparison Of Sutures And Devices Used In Closure Following Partial Nephrectomy Suturing, Bikal Paka

Masters Theses

Laparoscopic partial nephrectomy (LPN) is an effective surgical procedure to remove a small renal tumor, while preserving the remainder of the kidney. However, it is a technically challenging procedure to maintain hemostatic condition on the kidney during LPN suturing. Three different experiments were conducted to explore the characteristics and limitations of the current mechanism for tissue approximation during LPN procedures.

During the first experiment, a standard suture anchor Hem-o-lok device, a standard stop knot, and three prototype devices were compared to each other based on the amount of tension that could be placed on a suture before there was a …

Computational Modeling Of Β5-Β6 Carbapenemase Loop In Wild Type And Selected Mutants Of Oxa-24 Class D Β-Lactamase, James Roland Lafleur

Masters Theses

Bacterial resistance to antibiotic therapies, especially to β-lactams, is an increasing problem. β-lactamases are the main source of clinical resistance to these antibiotics, and the class D β-lactamases are one of the most rapidly expanding classes of these enzymes. The emergence of class D enzymes with the ability to hydrolyze the newest family of β-lactams - the carbapenems - is a serious concern for the healthcare system as carbapenems are last resort antibiotics: ideal for severe infections after other therapies have failed. Class D β-lactamases are very diverse in terms of sequence and substrate profile, and it remains unclear what …

Photophysiological Studies Of Cyanobacterial Mats In Submerged Sinkholes Of Lake Huron, Michael Snider

Masters Theses

No abstract provided.

Durability Of Sutures Used In Partial Nephrectomy: Tested Across Commonly Used Diameters And Materials Stopped With Lapra-Ty® Suture Clips And Hem-O-Lok® Ligation Systems Under A Given Tension, Nadia Sunny

Masters Theses

The primary healing of soft tissue incision advances in the first fourteen days after surgery. Sutures used to close the incision are terminated with knots to last over this period under tension inside the tissue. However, knots significantly reduce the tensile strength of the sutures, and make the surgery closing time longer and tedious. Suture clips are used to overcome these limitations. It was found in prior researches that sutures slip out of the suture clips, although the manufacturer of the LAPRA-TY® suture clips claims endurance of this product under tension for at least fourteen days. Use of suture clips …

Documenting Annual Differences In Vegetation Cover, Height And Diversity Near Barrow, Alaska, Timothy Frederick Botting

Masters Theses

Vegetation in the Arctic has been shown to respond to climate change. Documented changes have the potential to result in numerous ecosystem consequences. Therefore, understanding vegetation change is of great importance. This study documents changes in tundra vegetation with a focus on understanding the influence of annual differences in weather. Vegetation was sampled using a point frame method on 98 1-m² plots in 2010 and 2013 near Barrow, Alaska. A subset of 30 of these plots was also sampled in 2012 and 2014. Plant encounters were identified to species and grouped into one of the following functional groups: bryophytes, …

Evolution Of Invasive Species In Response To Management: Potential For Herbicide Resistance In Watermilfoil, Lindsey-Ann Louise Schulte

Masters Theses

Herbicides are commonly used to control invasive plants. While agricultural weed scientists have focused on herbicide resistance, little is known about its importance in nonagricultural settings. Hybrid Eurasian watermilfoil (Myriophyllum spicatum x M. sibiricum) is an invasive aquatic plant that is frequently managed with herbicides throughout the United States. In this thesis, I consider the potential for natural populations of this taxon evolving resistance to 2,4-dichlorophenoxyacetic acid (2,4-D), the most commonly used systemic herbicide. Evolutionary change in a trait between generations as a result of selection requires both genetically based variation of the trait within a generation (heritable …

Female Mate Choice In A Mainland Population Of The Strawberry Poison Frog, Oophaga Pumilio, Meaghan Gade

Masters Theses

Sexual selection and female mate choice are driving forces in the evolution and maintenance of biological diversity, and may function in the evolution of many secondary sexual characteristics throughout multiple taxa. Female mate selection has been experimentally shown to drive the evolution of color between the polytypic populations of the dendrobatid frog, Oophaga pumilio, in the Bocas del Toro archipelago in Panama. However, limited studies exist examining biologically relevant female mate choices within a single population. Using analogous experimental arenas from previous studies, females were presented with two males exhibiting phenotypic extremes from within the same population at La Selva …

Children Birth To Age Three With Feeding Difficulties: Systems Level Perspectives Of Supports, Needs, And Interagency Collaboration, Sondra M. Stegenga

Masters Theses

Early identification and treatment of feeding difficulties greatly improves outcomes for young children with feeding difficulties (Williams et al., 2006). However, identifying and addressing feeding difficulties in young children, birth to age three, is complex; requiring not only interdisciplinary collaboration (Arvedson, 2008; Bruns & Thompson, 2010; Lefton-Greif & Arvedson, 2008; Williams et al., 2006) but also interagency collaboration due to the various partners involved in service provision for young children, birth to age three (Individuals with Disabilities Education Act, 2004). When such interagency collaboration is needed, systems level structural supports are shown to levy the greatest impact on outcomes (Tseng …

Assessment Of Northern Bobwhite Survival And Fitness At Felsenthal National Wildlife Refuge, Arkansas, Jacob W. Doggett

Masters Theses

In the West Gulf Coastal Plains (WGCP) northern bobwhite (Colinus virginianus) numbers are declining faster than range-wide averages and such declines have been linked to the consequences of land management within the region. Management for the endangered red-cockaded woodpecker (Picoides borealis) has benefitted northern bobwhite by restoring mature pine-grassland ecosystems in some areas of the region; however, at Felsenthal National Wildlife Refuge, Crossett, Arkansas, USA, the bobwhite population was not increasing despite the availability of seemingly suitable habitat from management for the endangered species. To understand factors that may be affecting bobwhite survival on Felsenthal National …

Citizens Of The World: An Autoethnography Of Couchsurfing And Uncertainty Reduction Theory, Anderson Santos

Masters Theses

This study examines through an autoethnography the culture of couchsurfing and the process of hospitality networks through computer mediated communication in five European countries during three months of 2012. Using Maslow's hierarchy of needs as a framework the study was divided into five topics and analyzed using Uncertainty reduction theory. The study found that couchsurfers have needs and prioritize these needs as The hierarchy of needs predicts. CouchSurfers also employ uncertainty reduction strategies similar to those used within computer mediated communication when choosing their host. Over 20 hosting experiences have been analyzed in this study. The field data was collected …

Cappack Devices For Enhanced Qnmr Measurements In 1H Nmr Spectroscopy, Lingyu Chi

Masters Theses

"Quantitative NMR analyses can be improved by adding well-defined external references for measuring sample properties on absolute scales. Special Capillary-tube Package (CapPack) devices were invented that provide in situ information (e.g., temperature, pH, pressure, integration, chemical shift, lock, etc.) about a sample with spectral imprimaturs. A new microscale glass-sealing technique produced CapPack devices that can survive high temperatures and pressures in harsh environments. Two CapPack devices are discussed: (1) Gradient CapPack-- a device for examining the irradiation bandwidth of solvent-suppression pulse sequences; (2) T₁ CapPack - a device for examining the T₁ robustness of solvent-suppression pulse sequences. A …

Freeform Extrusion Fabrication Of Titanium Fiber Reinforced 13-93 Bioactive Glass Scaffolds, Albin Thomas

Masters Theses

"Although implants made with bioactive glass have shown promising results for bone repair, their application in repairing load-bearing long bones is limited due to their poor mechanical properties as compared to human bones. This thesis study is on freeform extrusion fabrication of silicate based 13-93 bioactive glass scaffolds reinforced with titanium fibers. A composite paste was prepared with 13-93 bioactive glass filled with titanium fibers (~16 µm in diameter and aspect ratio of ~250) having 0.1 to 0.4 vol. % of the bioactive glass scaffold. This paste was then filled into a syringe manually, and then extruded through a nozzle …

A Simpler Route To Building Photochromic Cinnamaldehyde Semicarbazones, Byron R. Ebbert

Masters Theses

Photochromic semicarbazones are an interesting group of compounds that show potential in a broad range of applications, including as a more environmentally friendly replacement for photochromic metal complex compounds. Previous work has shown the feasibility to synthesize photochromic cinnamaldehyde semicarbazones (CSCs) from a benzaldehyde and a protected acetaldehyde Wittig reagent. A new, quicker, and cheaper approach to constructing these CSCs from crotonaldehyde was explored in this research. A three reaction sequence would convert crotonaldehyde to a CSC; first, an allylic bromination of the semicarbazone with N-bromosuccinimide (NBS); second, an Arbuzov reaction to prepare the semicarbazone phosphonate; and finally a condensation …

Creative Writing Pedagogy: The Autobiographical Narrative In Hybrid Projects As A Means To Explore Intersectionality, Tana G. Young

Masters Theses

My thesis addresses the role of creative writing methods in fostering close observation, attention to detail, critical thinking and a keener awareness of intersectionalities in writing classrooms across disciplines, but most especially the humanities and social sciences. I contend that the "real work" of the academy is critical thinking. Further, using creative writing, specifically autobiographical narrative in FYC, anticipates multimodal projects and digital storytelling, all of which fosters creative and critical thinking.

Derivatization And Separation Of Natural Estrogens (Estrone, 17Β-Estradiol, And Estriol) Using Gas Chromatography With Flame Ionization Detection (Gc-Fid), Dena L. Guptill

Masters Theses

A major cause of concern for estrogens found in the environment is that even at very low concentrations (10-100 ng/L) they can have a negative effect on aquatic ecosystems by disrupting endocrine systems. Due to the increasing importance of monitoring the levels of estrogens in the environment, a detection method was developed to identify and quantify three natural estrogens (estrone, 17β-estradiol and estriol) using gas chromatography with flame ionization detection (GC-FID). In addition, the efficacy of two derivatizing agents, N,O-bis(trimethylsilyl) acetamide (BSTA) and N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA), was evaluated. The GC detector (FID) was most responsive with E3, followed by E1 and …

Allelopathic Effects Of S. Canadensis On The Germination Of Native Prairie Plants, James David Megenhardt

Masters Theses

Solidago canadensis has become a aggressive species of North American prairie forb throughout the world and within restored prairies throughout North America, causing the loss of biodiversity within those ecosystems. While reproductive methods of wind dispersed seeds and clonal expansion through rhizomes has helped S. canadensis colonize and spread through these ecosystems, S. canadensis also releases allelopathic chemicals which may inhibit the germination and growth of competing species. What was unknown is if these same allelopathic chemicals which give S. canadensis an edge within foreign ecosystems might also explain why S. canadensis is so prolific in restored North American …

Collaboration Portal For Researchers At Eastern Illinois University, Fatemeh Khastkhodaardekani

Masters Theses

This thesis addresses a need for an online collaboration environment for the researchers at Eastern Illinois University (EIU). As the solution, it provides a portal for researchers (students and faculties) who wish to explore and collaborate on projects based on ideas from those who may not have the necessary skills. This is considered to help developing projects based on the ideas as well as making teams, and teach different groups of people different perspectives. Therefore, it offers a learning environment. I started off by examining existing tools and methodologies to satisfy this purpose. As the result, the deliverable project is …

Daily Activity Patterns In Three Migratory Bird Species At A Stopover Site On The Northern Coast Of The Gulf Of Mexico, Lynn Schofield

Masters Theses

CHAPTER I: A Comparison of Diel Movement Patterns in Three Bird Species at a Stopover Site on the Northern Coast of the Gulf of Mexico

During migration, birds require stopover habitats where they stop en route to rest, refuel, and prepare for the next stage of their migration. For songbirds, many short movements made within a stopover habitat are known to be costlier than a single long migratory flight, as it takes a considerable amount of energy to initiate flight. This indicates that migrating birds should strive to balance the energy expenditure made in movement during stopover and energy gains …

Asian Carp Population Status And Reproductive Potential In Illinois River Tributaries, Clinton Wesley Morgeson

Masters Theses

Large floodplain rivers are among the most complex natural systems characterized by exchange between the river and its floodplain. Information regarding fishes in main channel habitats is abundant, however much less understanding extends into their tributaries. Tributaries of large rivers provide critical habitats for main channel fishes, important for foraging, spawning, and refuge. In addition to native diversity, large rivers are host to multiple exotic species invasions, threatening biodiversity, ecosystem function, and habitat quality. Two notorious invaders are Silver Carp (Hypophthalmichthys molitrix) and Bighead Carp (H. nobilis), collectively Asian Carp, presenting an imminent threat of invasion …

Compatibility Factors Of Fascioloides Magna Miracidia And Four Sympatric Snail Species: Miracidial Behavior And Snail Response, Bryan Rolfsen

Masters Theses

Miracidia exhibit observable host-finding behaviors, and their sympatric snails have attributes that either permit or prohibit infection. This study was designed to assess the factors involved in intermediate host finding and host-parasite compatibility in the deer liver fluke (Fascioloides magna). The main aim was to determine the extent to which the parasite and/or the intermediate host are involved in host-parasite compatibility. A secondary goal was to determine what factors may lead to miracidial transformation. The study used a panel of four sympatric snails (Lymnaea caperata, Lymnaea palustris, Lymnaea exilis, and Physa sp.) that display …

"Fine Dignity, Picturesque Beauty, And Serious Purpose": The Reorientation Of Suffrage Media In The Twentieth Century, Emily Scarbrough

Masters Theses

Throughout the first half century of the woman's suffrage movement, the women of the movement were depicted as dastardly, masculine women who usurped the family structure with their penchant for politics. In the twentieth century, a new generation of woman's suffragists took command of their appearance in the media. Instead of controversial figures, woman's suffragists were envisioned as normal, beautiful women and mothers. Through the use of mass media, woman suffragists restructured their campaign to convince the general public that society needed women to clean up politics. In doing so, suffragists sacrificed their goals of sexual equality in favor of …

The Perception Of Black Male Students Of Black Faculty/Staff Involvement In Mentorship At A Predominantly White Institution, B. James Griffin Jr.

Masters Theses

This research study explored the perception African American men had of mentorship, its value to their education and the effects it had on their college success at a predominantly White institution. The study further focused on the impact mentorship had on the student when the mentor was of a different race versus the same race of the student. The research was guided by the following questions: (1) What is the value of mentorships related to attending a higher education institution, (2) What factors lead Black male students to seek mentorships, (3) What are the perceived differences between mentorship with cross-race …

Adaptive Significance Of Aberrant Chickadee Song In Illinois, Evan Andrew Glynn

Masters Theses

I studied the behavioral responses of Black-capped (Poecile atricapilus) and Carolina (P. carolinensis) chickadees to playback of Black-capped, Carolina, and aberrant chickadee songs throughout the state of Illinois. These two species are parapatrically distributed throughout the eastern United States, including Illinois. Some areas exist where the ranges of the two species overlap. Individuals in these contact zones often sing aberrant vocalizations. This study focused on the two parental vocalizations (i.e., Black-capped and Carolina song), and two of the most common aberrant vocalizations (the 'Greenville' and 'Vandalia' aberrant dialects), in an attempt to understand the adaptive significance of these aberrant songs. …

The Role Of Creg1 And Pitx1 As Master Regulators Of Liver Function, Anit Shah

Masters Theses

Development in mammals requires a complex array of positive and negative regulatory signals and responses. The liver is a major organ that has been studied extensively to understand underlying genetic processes responsible for specification, establishment and maintenance of tissue identity. Hepatoma and hepatoma variant cell lines have been used as a model to understand genetic networks responsible for liver function. Whole genome analysis of these cell types has identified candidate genes that might serve as master regulators of liver identity. In this study, the role of two candidate genes - cellular repressor of E1A stimulated gene (CREG1) and paired-liked homeodomain-1 …

Novel Bodipy Dyes For Dye-Sensitized Solar Cells, Hafsah Klfout

Masters Theses

Dyes-sensitized solar cells (DSCs) are of importance to efficient conversion of solar energy to electricity. The modern version of a DSC is a titanium dioxide nanoparticles-based electrochemical device, in which solar energy is absorbed by dye molecules and electrons from excited dye molecules are injected into the conduction band of titanium dioxide nanoparticle. The electrons are then transported through a network of interconnected TiO₂ particles to the fluorine- tin -oxide layer to the external circuit. In this process dye molecules are crucial to the device's energy conversion efficiency.

Boron-dipyrromethenes, known as BODIPY dyes, show strong absorption in the visible …

The Effects Of Industrial Biomass Gasification Ash As A Soil Amendment On The Earthworm Eisenia Fetida, Michael J. Blackowicz

Masters Theses

Soil application of solid residues from thermal conversion of biomass (i.e. combustion and pyrolysis) has become a topic of interest in recent years. However, there exists a gap in the literature with regard to soil application of gasification residues and their effects on soil health and soil macroorganisms. This study investigates the effects of three different ashes (hardwood oak/hickory, hardwood willow, corn stover), collected from industrial biomass gasification reactors (University of Minnesota Morris, Eastern Illinois University), as a soil amendment on the composting worm Eisenia fetida. Additionally, ash samples were analyzed for total polycyclic aromatic hydrocarbons (PAHs) and potentially toxic …

D-Galactose Decreases Mitoneet Levels In Liver Cancer Cells: Impact On Cellular Bioenergetics, Sudip Paudel

Masters Theses

Galactose is a simple sugar that at supraphysiological concentrations accelerates aging and age-related complications, which lead to impaired mitochondrial functions. MitoNEET is a small mitochondrial membrane protein with a molecular mass of 12.2 kDa that functions in diabetes, iron metabolism, regulation of oxidative phosphorylation (OXPHOS) and reactive oxygen species (ROS) homeostasis. MitoNEET knockdown increases cellular respiration rates and ROS levels similar to galactose treatment. Pioglitazone, an antidiabetic drug, binds to mitoNEET and ameliorates galactose toxicity. Cellular mitoNEET levels, exposure of cells to galactose medium, and pioglitazone treatment directly influence cellular respiration. To elucidate the role of mitoNEET in galactose induced …