Index Catalog // ScholarsArchive@OSU

Characterizing Optical Signatures of TiO₂ Amorphous Precursors

Creator:: Berry, Patrick
Abstract:: TiO₂ typically crystallizes into three polymorphs: brookite, rutile, and anatase. The phase selection problem in TiO₂ is the lack of understanding what conditions cause amorphous TiO₂ to crystallize into one of its three polymorphs during an annealing process. It has been recently shown that phase selection in TiO₂ is highly...
Resource Type:: Undergraduate Thesis

Molecular Dynamics on REX-GECO1 Reveal Structural Features Governing Fluorescence

Creator:: Rozanov, Nikita
Abstract:: Fluorescent proteins have emerged as an essential toolset for bioimaging, creating a demand for engineering proteins with new and improved fluorescent properties. In this thesis, I explore the atomistic structure of REX-GECO1, a newly engineered protein biosensor that has unique optical properties. Since this protein has no available crystal structure,...
Resource Type:: Undergraduate Thesis

Characterizing the accumulation of cellular senescence in the PS19 mouse model

Creator:: Valerio, Juno, Riordan, Ruben, Dimas-Munoz, Jovita, Ross, Grace, Zhen, Yu, Wang, Rong, and Perez, Viviana
Abstract:: Research poster for Summer Undergraduate Research Symposium 2019. Research was conducted with CURE funding in the Perez lab studying cellular senescence in the PS19 mouse model.
Resource Type:: Poster

pHrodo™ Green E. coli Bioparticles are a Viable Method for Quantifying Engulfment Activity in Anoplopoma fimbria (Sablefish) Phagocytes

Creator:: Mendoza, Anabel A.
Abstract:: Sablefish is a highly sought after seafood delicacy for which aquaculture of this species has recently been developed. By understanding the immunological functions in sablefish, our goal was to develop a mammalian fluorescent bioparticle assay that can viably analyze the efficiency of phagocytosis, an important function of the immune system....
Resource Type:: Poster

Evaluating Musculoskeletal Loading and Comfort During Nasal Spray Use

Creator:: Chan, Ashley, Kia, Kiana, Sisley, Jonathan, and Kim, Jay
Abstract:: The nasal spray market is growing as rates of use are increasing, however, there has been little research on the topical of how the mechanical properties of nasal sprays affect loading, comfort, and usability. To gather to make these comparisons, the data of 20 participants were gathered by measuring muscle...
Resource Type:: Poster

Water Insecurity in Asia

Creator:: Simmons, Jaclynn
Abstract:: Water security and what it is and how it is affecting the freshwater resources in Asia.
Resource Type:: Poster

Religion as a Common Sense Category

Creator:: Harrington, Scott T.
Abstract:: In the field of religious studies, it is common to separate meta theories about the concept of religion itself into two equally problematic categories that both make claims about the truth of religious doctrine. This is done by attempting to define religion by historically excluding non-Christian religious traditions from the...
Resource Type:: Research Paper

A Case Study of Solar Warming and Subsequent Mixing in the Arctic Upper Ocean for the 2011 Spring-Summer Transition

Creator:: Lee, Ara
Abstract:: Autonomous buoys were deployed in 2011 in the central Arctic: An Ice-Tethered Profiler (ITP) and Ice Mass Balance (IMB) buoys were deployed in the Makarov basin; a Polar Ocean Profiling System (POPS) and Ice Thickness (Ice-T) buoy were deployed on the Eurasian Basin. The two different sites were approximately 70km...
Resource Type:: Undergraduate Thesis

We Hear You Now

Creator:: Roe, Philip
Abstract:: An analysis on the work of Tim O'Brien's "The Things They Carried" and his ability to create powerful imagery and contextualize the unknown of war for the those who have never taken part. --Vietnam Experience Final Paper
Resource Type:: Research Paper

May I Interject: An Investigation into Gendered Oral Argument Patterns in Federal Appellant Courts

Creator:: Carsh, Austin, Ellertson, Megan, Fernández-Ortega, Rodrigo, Larsen, Leif, and Solberg, Rorie L.
Abstract:: Oral argument has always been an integral part of any appellate courts’ function. For most of the court’s history, both the advocates arguing before the Court and the judges presiding over the court were extremely similar; all being white males. However, the late 20th and 21st centuries have diversified both...
Resource Type:: Poster

Analysis of boscalid resistance of isolates of Botrytis cinerea

Creator:: Villanueva, Brenda
Abstract:: Succinate dehydrogenase (Sdh) inhibitor fungicides, such as boscalid, are effective for the management of gray mold caused by the fungal pathogen Botrytis cinerea. Unfortunately, resistance to boscalid was common among isolates of the pathogen from small fruits grown in Oregon. Boscalid-resistance is commonly associated with mutations in Sdh, especially in...
Resource Type:: Undergraduate Thesis

Biogas inhibition of fats, oils, and greases with varying ammonia levels

Creator:: Aranda, Ana A.
Abstract:: Biogas can be used to generate energy from a wide variety of sources. Wastewater treatment sludge is an effective source of waste to be used for generation of biogas to make energy which can be used to heat homes and run businesses. This would help decrease the use of fossil...
Resource Type:: Undergraduate Thesis

Current state of the organic and conventional strawberry industry in Oregon

Creator:: Howe, Shianne M.
Resource Type:: Presentation

Current State of the Organic and Conventional Strawberry Industry in Oregon

Creator:: Howe, Shianne M.
Abstract:: With over three billion pounds of berries grown nationally each year, strawberries are an important economic contributor to agriculture in the US (Grubinger, 2012). However the strawberry industry in Oregon has been in a period of transition over the past few years. Strawberry acreage, planted and harvested, as well as...
Resource Type:: Poster

Needs Assessment of the Strawberry Industry

Creator:: Howe, Shianne M.
Abstract:: Oregon is the number three producer of strawberries in the nation despite the fact that Oregon strawberry acreage dropped from 2,600 acres in 2005 to 2,000 acres in 2014 (Beeles, 2015; NASS, 2019, Losh, 2017). With over three billion pounds of berries grown nationally each year, strawberries are an important...
Resource Type:: Undergraduate Thesis

The Gender Wage Gap and Education

Creator:: Nordin, Bri
Abstract:: Does the wage gap exist in careers that require higher levels of educational attainment? Research indicates that, on average, women make around 80% of what men earn. This study aims to investigate the relationship between educational attainment and the magnitude of the wage gap. Due to the differences in gender...
Resource Type:: Research Paper

New discovery leads to a whole new meaning of “trash fish”

Creator:: Chione, Andrew
Abstract:: This paper is an assignment for my Ichthyology class at Oregon State University. I was tasked with creating a new fish species that is scientifically possible and telling a fictional story of its discovery.
Resource Type:: Research Paper

Associations Between Adolescent Trauma and Adult Facial Trustworthiness

Creator:: Ames, Ashley
Abstract:: Any interaction with another person requires some judgement of their characteristics from a short amount of time. Each day a person can interact with many individuals and quick judgments have to be made in each situation to decide how to act or react. This means a person can make hundreds...
Resource Type:: Poster

Fungal endophytes as source to combat bacterial infections

Creator:: Green, Jaimie R
Abstract:: Endophytes, foliage inhabiting fungi, are an unexplored source of fungal biodiversity and a potential resource for the production of bioactive natural products. In this research, leaf tissues from the species Arbutus menziesii, Rhododendron macrophyllum and the genus, Ilex and Salix were collected for the isolation of endophytic fungi. Fungal extracts...
Resource Type:: Presentation and Undergraduate Thesis

Ionic Strength and pH: A Look at Nanostar Stability

Creator:: Aldous, Tanner J. E.
Abstract:: Nanostars have many potential applications, particularly in biomedicine, such as drug delivery, detection assays, and even cancer treatment. Seeing how their plasmon changes in response to changes to the environment of the nanostars can give us an insight to the stability of the nanostars. Our current studies involve the effect...
Resource Type:: Poster

Riesz Transforms on a Sphere

Creator:: Tyma, Troy
Abstract:: Motivated by the Navier-Stokes equations, which are a set of unsolved equations related to fluid motion in R^3, we explored the incompressibility condition and the Neumann boundary problem. After exploring, we noticed that using iterated Riesz transforms of the boundary data could be used to get information about the velocity...
Resource Type:: Undergraduate Thesis

Use of Platelet Rich Plasma for the Treatment of Subclinical Endometritis in Beef Heifers

Creator:: Puttman, Elizabeth A.
Abstract:: Postpartum uterine inflammation (endometritis) is not uncommon in beef cattle, resulting in infertility and culling. Prolonged calving may contribute to the increased incidence of endometritis in heifers. Commonly used methods to treat endometritis in beef cattle include intrauterine antibiotics and/or hormone injections, which can result in meat residues. Platelet rich...
Resource Type:: Presentation and Undergraduate Thesis

Travelling Wave Analysis of Nonlinear Maxwell Models with Applications to Nonlinear Optics

Creator:: Langlie, Noah
Abstract:: In 1877 John Kerr described an experiment that demonstrated a quadratic change in refractive index in a plate glass placed in a strong external electric field. This results in a nonlinear relationship between the average electric polarization within the materials and the intensity of the applied electric field. This opened...
Resource Type:: Undergraduate Thesis

Fabrication and low-temperature measurement of quantum devices

Creator:: Nichols, Dublin M.
Abstract:: Since the advent of graphene, research on 2D materials has exploded. Countless experiments have uncovered novel properties that emerge when different layered crystals are cleaved down to only a few atomic layers in thickness. The most popular of these non-graphene 2D materials is MoS2, a semiconductor which has been of...
Resource Type:: Undergraduate Thesis

Bacterial seed endophytes of Douglas-fir (Pseudotsuga menziesii) and their potential to confer drought tolerance

Creator:: Hatwal, Shikhar
Abstract:: Bacterial endophytes have the potential to confer benefits to Douglas-fir ( Pseudotsuga menziesii ), for instance drought tolerance. Bacterial endophytes originating from seeds are especially important. This is because seed endophytes are more likely to be the first endophytes to get established within the young host plant. The goals of...
Resource Type:: Undergraduate Thesis

Detection of exciton polaritons in organic thin film TES-ADT

Creator:: Haas, David P.
Abstract:: Exciton polaritons are quasiparticles composed of a quantum superposition of matter and light states that arises from the coupling of a standing wave photon and an exciton. This research has two primary objectives: to design and fabricate a Fabry-Perot microcavity system in which to produce exciton polaritons; and to show...
Resource Type:: Undergraduate Thesis

Terahertz field enhancement in nanoantennas on gallium arsenide

Creator:: Brequigny, Victor
Abstract:: Terahertz (THz) spectroscopy is a great tool not only to study fundamental physical processes such as many-body Coulomb interaction but also to develop ultrafast electronic devices. More specifically, intense THz fields interacting with semiconductors have exhibited strong nonlinear effect involving extreme carrier dynamics. In this experiment, intense THz radiation was...
Resource Type:: Undergraduate Thesis

Phytochemical characterization of Fagonia indica and its effects on MCF-7 breast cancer cell line

Creator:: Kumbi, Yadano
Abstract:: Phytochemicals from the genus, Fagonia, have been attracting increasing attention due to their potential beneficial effects on human health, particularly, anti-cancer properties. Certain Fagonia species contain various types of phytochemicals such as saponins, alkaloids, cardiac glycosides, flavonoids, terpenoids, and tannins. In this study, we investigated the phytochemical composition of a...
Resource Type:: Undergraduate Thesis

Identity and drought tolerance effects of fungal seed endophytes in Coastal Douglas-fir (Pseudotsuga menziesii var. menziesii)

Creator:: Bergmann, Gillian E.
Resource Type:: Presentation

Deriving relationships between number of observed short gamma ray bursts and viewing angle

Creator:: Micallef, John T.
Abstract:: Gamma ray bursts are some of the brightest events in the entire observable universe. Since the late 1960’s, thousands of gamma ray bursts have been observed and they have been researched extensively. However, there are still many mysteries which remain unsolved. One such mystery is whether or not the viewing...
Resource Type:: Undergraduate Thesis

Class Standing and Success: Do Freshmen Have Lower Self-Efficacy & Goal Achievement for "Difficult" Goals?

Creator:: Carlson, Rebecca and Almuaybid, Ameer
Abstract:: Do freshmen achieve less of their personal and academic short-term goals in comparison to upperclassmen? Some may intuitively assume that due to age, or lack of experience, college freshmen would have lower perceived task-specific ability (self-efficacy) and actually achieve less (goal-completion ranging from 0% to 100%). Differences between various class-standing...
Resource Type:: Poster

Methods of Reproductive Control in Domestic and Free-Roaming Horses and the Behavioral Implications

Creator:: Negretti, Christina L.
Abstract:: The current American free-roaming horse (Equus caballus) population far exceeds the appropriate population limit set by the Bureau of Land Management (BLM) to preserve resources on public lands. Several techniques have been tested to assist in decreasing repopulation rates. The purpose of the present study was to analyze two contraceptive...
Resource Type:: Undergraduate Thesis

Embryonic stem cell research: invaluable and ethical

Creator:: Sentker, Jade O
Resource Type:: Research Paper

Multi-Grand, Multi-Canonical, Flat Histogram, Monte Carlo Simulations for the Square Well Fluid

Creator:: Trotter, Cade W.
Abstract:: Currently multi-canonical, and grand canonical Monte Carlo simulations exist, but do not always give all of the necessary information of the system. When using a 1-D (only changing in one variable) broad histogram Monte Carlo method a user would need to run a range of simulations in order to get...
Resource Type:: Undergraduate Thesis

Anti-Reflective Films: Spectroscopy and Ellipsometry of Porous Films

Creator:: Ramm, Joshua J.
Abstract:: The relationship between the index of refraction and the porosity of a material is that the index decreases with respect to the porosity. This property can be used to change the index of refraction of films which allows control of the reflection of the material. This is important because being...
Resource Type:: Undergraduate Thesis

Understanding change: surface manipulative-activities as a tool for addressing student difficulties in thermodynamics

Creator:: Siegel, Reese R.
Abstract:: Multivariable functions permeate physics, mathematics, and other sciences. Understanding how quantities in multivariable relationships change together – or co-vary – is important for studying physical systems. In this project, we asked junior-level physics majors to describe the covariation of quantities in a multivariable context given a 2D graph. We identified...
Resource Type:: Undergraduate Thesis

Beyond Scattering: Identifying the Boundaries of Light Control with a Genetic Wavefront Optimization Algorithm

Creator:: Weller, Jesse A.
Abstract:: The ability to focus light through strongly scattering materials is opening up exciting new avenues in many fields, such as optics, computer vision, biology, and medicine, which utilize light delivery and imaging techniques. Efficient, high resolution wavefront shaping and optimization methods are crucial to enabling this new capability. In this...
Resource Type:: Undergraduate Thesis

Exploiting Diffraction Orders from a Phase Limited SLM to Remove and Model Zernike Aberrations

Creator:: Goschie, Aaron J.
Abstract:: Using a plastic bottle, we explore the capabilities of a reflective phase-only Spatial Light Modulator (SLM) in removing wavefront aberrations using a Zernike polynomial phase mask, with the modulators phase depth limited to 0.8π radians. Wavefront aberrations, which can be modeled with Zernike polynomials, distort image transmission through various optical...
Resource Type:: Undergraduate Thesis

Plasmon Induced Transparency in Terahertz Metamaterials

Creator:: Meyers, Joseph
Abstract:: Plasmon induced transparency (PIT) describes a spectral response of coupled plasmonic resonators in that coupling between bright and dark modes leads to a destructive interference resulting in a narrow transparency window. This process has many applications in material characterization and advanced optical devices such as slow light devices or ultrafast...
Resource Type:: Undergraduate Thesis

Drunken Walking: A Novel Brownian Dynamics Simulation for the Mechanochemical Cycle of the Dynein Motor Protein

Creator:: Waczak, John L.
Abstract:: The dynein molecule is a peculiar motor protein recognized for its unique stepping behavior. Sometimes it steps forwards. Other times it steps backwards. It has even been observed to occasionally shuffle by beginning a step with the same domain many times in row. These motions make dynein an interesting object...
Resource Type:: Undergraduate Thesis

Teaching Gravitational Potential Energy: Student Interaction with Surface Manipulatives

Creator:: Kimbrough, Abigail E.
Abstract:: Past studies have shown that students struggle with main concepts of potential energy, such as reading graphs, understanding that potential energy can be negative, and, most pertinent to this research project, connecting potential energy to force. I designed an activity to help introductory physics students address these struggles. The activity...
Resource Type:: Undergraduate Thesis

Chiral Topological Defects in Nematic Liquid Crystals and Classical Field Theories

Creator:: Douglas, Brennan
Abstract:: A great variety of topologically protected defects exist in ordinary and exotic states of matter. Some of them are promising candidates for technological applications such as magnetic memory or quantum computers. Others possess some properties of elementary particles that could lead to potential applications in quantum fields. Nematic liquid crystals...
Resource Type:: Undergraduate Thesis

CMIP6 Abrupt CO2 Quadrupling Scenario: Analysis of Climate Model Output to Determine the Effect of Clouds

Creator:: Ericksen, Kristin M.
Abstract:: The largest source of uncertainty among climate models simulating the climate system response to increased atmospheric carbon dioxide concentrations is the cloud feedback, the amplification or dampening of the warming from the carbon dioxide forcing by clouds. Refining our knowledge of the cloud feedback is therefore essential to gaining a...
Resource Type:: Poster

Impact of lignin on efficiency of small-scale enzymatic hydrolysis of lignocellulosic biomass

Creator:: Potapchuk, Angelica
Abstract:: Energy production and consumption is a major environmental and economic concern in the world today. Biofuel produced from lignocellulosic biomass is being explored as an alternative energy source to petroleum. Lignocellulosic biomass is comprised of cellulose, hemicellulose, and lignin. To produce biofuels, lignocellulosic biomass must be broken down to expose...
Resource Type:: Presentation and Undergraduate Thesis

Vegetative effects of RNAi-suppression of the poplar homolog of LEAFY in the field

Creator:: Jacobson, Jeremy
Abstract:: Due to public and regulatory restrictions, genetic containment technology is critical for research and development of transgenic trees in forestry. A multi-year field trial demonstrated that the RNAi-LFY construct successfully induces sexual sterility in 6K10 poplar (Populus alba) without visible effects on vegetative development. However, its limited number of replicates...
Resource Type:: Undergraduate Thesis and Presentation

Effect of hydraulic retention time and buffer concentration on hybrid microbial electrolysis cell performance

Creator:: Camplair, Mora
Resource Type:: Presentation

Pilot study of operational parameters in microbial electrolysis cell with dark fermentation reaction

Creator:: Camplair, Mora
Abstract:: Biohydrogen production via dark fermentation (DF) and microbial electrolysis cells (MEC) demonstrate great potential for sustainable hydrogen generation. In this study, DF and MEC were coupled as a hybrid reactor and evaluated using brewery wastewater. The effect of hydraulic retention time (HRT) and buffer concentration on reactor performance were assessed...
Resource Type:: Undergraduate Thesis

Environmental DNA: testing assumptions with experimentation

Creator:: Cousins, Christopher D.
Abstract:: This study used a factorial mesocosm design to quantify American bullfrog (Lithobates castebeianus) eDNA to assess the relationship between body size, density, and eDNA shedding rates.
Resource Type:: Research Paper

Functional consequences of microRNA regulation by polycyclic aromatic hydrocarbons in 3D human bronchial epithelial cells

Creator:: Mans, Michael-Andres D.
Abstract:: Polycyclic aromatic hydrocarbons (PAHs) are a class of contaminants ubiquitous in the environment and result from the incomplete combustion of fossil fuels. Many PAHs have been identified as procarcinogenic, and are metabolized to form DNA adducts; however, other mechanisms also may contribute to toxicity and help explain differences in toxicity...
Resource Type:: Undergraduate Thesis

Neutron Capture Cross Sections of Cadmium Isotopes

Creator:: Gicking, Allison
Abstract:: The neutron capture cross sections of ¹⁰⁶Cd, ¹⁰⁸Cd, ¹¹⁰Cd, ¹¹²Cd, ¹¹⁴Cd and ¹¹⁶Cd were determined in the present project. Four different OSU TRIGA reactor facilities were used to produce redundancy in the results and to measure the thermal cross section and resonance integral separately. When the present values were compared...
Resource Type:: Undergraduate Thesis

Neutron Capture Cross Sections of Selenium Isotopes

Creator:: Dearmon, Howard D.
Abstract:: The thermal cross sections and resonance integrals for neutron capture by ⁷⁴,⁷⁸,⁸⁰,⁸²Se were measured using the same procedure and equipment for all of the isotopes. Uncertainty and absence of accurate previous values for several isotopes introduces a need of measuring these parameters using similar techniques. This was done using OSU’s...
Resource Type:: Undergraduate Thesis

A Study of Charging Behaviors in Organic Semiconductors using Optical Trapping

Creator:: Founds, Graham M.
Abstract:: We measure the charging and discharging of two organic materials, PCBM and ADT-TES-F. These materials are studied through the noncontact method of particle trapping known as Optical Tweezers, where an IR laser is used to constrain the motion of a coated or noncoated silica sphere while its positional data is...
Resource Type:: Undergraduate Thesis

Exploring the Optical and Electronic Properties of Xylindein, a Fungus-Derived Pigment, as a Sustainable Organic Semiconductor

Creator:: Quinn, Alexander
Abstract:: Xylindein is an organic pigment derived from Chlorociboria aeruginascens and C. aeruginosa fungi that has shown promise as an organic semiconductor. Preliminary estimates of charge carrier mobilities (CCMs) on the order of 0.1 cm2/Vs were calculated from early tests on xylindein thin films, and photocurrents were also observed under laser...
Resource Type:: Undergraduate Thesis

Quantifying Marine Microplastic Ingestion in Black Rockfish (Sebastes melanops) on the Oregon Coast

Creator:: Laundry, Jordan G.
Abstract:: 1. To determine whether plastics are being ingested by black rockfish at three sites along the Oregon coast 2. To determine if there is a significant difference in rates of plastic ingestion between marine reserve locations and Newport location. 3. To quantify the extent of plastic ingestion and to identify...
Resource Type:: Research Paper

Enhancing Protocols to Improve Consistency Across Nanotoxicology Studies

Creator:: Luker, Sabrina R.
Abstract:: In current nanotoxicology research, there is a lack of standardization in reporting of zebrafish exposure media and sonication practices. This lack of standardization in use and reporting methods has made reproducing nanoparticle (NP) toxicity results between labs a common issue. It is important to have a standardized way of reporting...
Resource Type:: Presentation

Toxicity and Mutagenicity of Polycyclic Aromatic Hydrocarbons in Contaminated Soils using Mammalian In Vitro Assay

Creator:: Luker, George W.
Abstract:: There exists a growing need to establish a better in vitro model for evaluating PAH toxicity and carcinogenicity and to improve assessments of risk to human health, especially to the complex mixtures that exist in the environment. Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants due to the incomplete combustion...
Resource Type:: Presentation

Enhancing Protocols to Improve Consistency Across Nanotoxicology Studies

Creator:: Luker, Sabrina R.
Abstract:: In current nanotoxicology research, there is a lack of standardization in reporting of zebrafish exposure media and sonication practices. This lack of standardization in use and reporting methods has made reproducing nanoparticle (NP) toxicity results between labs a common issue. It is important to have a standardized way of reporting...
Resource Type:: Undergraduate Thesis

Toxicity and Mutagenicity of Polycyclic Aromatic Hydrocarbons in Contaminated Soils using Mammalian In Vitro Assay

Creator:: Luker, George W.
Abstract:: There exists a growing need to establish a better in vitro model for evaluating PAH toxicity and carcinogenicity and to improve assessments of risk to human health, especially to the complex mixtures that exist in the environment. Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants due to the incomplete combustion...
Resource Type:: Undergraduate Thesis

Partial purification of endo-1,4-β-D-glucanase I of Trichoderma reesei and use in small-scale enzymatic hydrolysis of cellulose

Creator:: Pautsch, Lindsay
Abstract:: In order to reduce the cost of lignocellulosic ethanol production, a model was previously developed to predict the amount of fermentable sugar released based on parameters concerning both biomass and enzymes. To validate this model, enzymatic hydrolysis must be carried out using individual purified cellulase enzymes. Endo-1,4-β-D-glucanase I (EG I),...
Resource Type:: Undergraduate Thesis

Partial purification of endo-1,4-β-D-glucanase I of Trichoderma reesei and use in small-scale enzymatic hydrolysis of cellulose

Creator:: Pautsch, Lindsay
Abstract:: In order to reduce the cost of lignocellulosic ethanol production, a model was previously developed to predict the amount of fermentable sugar released based on parameters concerning both biomass and enzymes. To validate this model, enzymatic hydrolysis must be carried out using individual purified cellulase enzymes. Endo-1,4-β-D-glucanase I (EG I),...
Resource Type:: Presentation

Impacts of Tertiary Ligands in Catalysis in Thermostable Human Carbonic Anhydrase II by Site-directed Mutagenesis and Genetic Code Expansion

Creator:: Stevens, Danielle M.
Abstract:: Carbonic anhydrases are ubiquitous enzymes that catalyze the reverse hydration and dehydration of carbon dioxide and bicarbonate respectively. A variety of tumors in humans show overexpression of human carbonic anhydrase II (HCA II) leading to an acidic breakdown of carbon dioxide into bicarbonate. While a variety of drug inhibitors exist,...
Resource Type:: Research Paper

Characterizing the symbiotic interactions between Rhodococcus and plants

Creator:: Stevens, Danielle M.
Abstract:: Bacteria are critical to the health of eukaryotes and the ecosystems in which they persist. Some symbiotic interactions are mutualistic in which both microbe and host benefit from the partnership. Other interactions are parasitic, and the microbe typically benefits at a cost to the host. Rhodococcus is a genus of...
Resource Type:: Undergraduate Thesis

Biosynthetic Studies of the α-Amylase Inhibitor Trestatin in Streptomyces dimorphogenes

Creator:: Demessie, Ananiya A.
Abstract:: The prevalence of obesity and diabetes in the United States and globally has been rising in the last few decades and it continues to climb. One of the causes for this increase is the over consumption of sugars and/or carbohydrates. Among medications available to treat obesity and diabetes are the...
Resource Type:: Undergraduate Thesis and Presentation

Polarization Dependent Spectral Analysis Reveals Dipole Alignment and Intermolecular Coupling in Anthradithiophene Organic Semiconducting Crystals

Creator:: Lam, Andrew
Abstract:: Organic photovoltaics are being explored as the next generation material for semiconducting and optoelectronic devices but are limited by their stability and efficiency. One new candidate is crystallized Anthradithiophene (ADT), which is a promising photo-voltaic material due to its high quantum yield and adjustable side groups. The side derivatives TES-F,...
Resource Type:: Undergraduate Thesis

Biotic and Abiotic Factors Affecting the Presence of Beneficial Insects on Oregon Christmas Tree Farms

Creator:: Cain, Alyssa B.
Abstract:: Beneficial insects could provide valuable pest control services on Oregon Christmas tree farms, but a limited amount of data exist that quantifies the type and abundance of beneficial insects on farms. This study surveyed beneficial insects on two farms that differed in their management strategies as well as other abiotic...
Resource Type:: Presentation

Biotic and Abiotic Factors Affecting the Presence of Beneficial Insects on Oregon Christmas Tree Farms

Creator:: Cain, Alyssa B.
Abstract:: Beneficial insects could provide valuable pest control services on Oregon Christmas tree farms, but a limited amount of data exist that quantifies the type and abundance of beneficial insects on farms. This study surveyed beneficial insects on two farms that differed in their management strategies as well as other abiotic...
Resource Type:: Poster

Up-estuary extent and lithologic characteristics of tsunami deposits attributed to the 1700 Cascadia earthquake within Alsea Bay, OR

Creator:: Spruell, John T.
Abstract:: Cascadia’s 1700 earthquake generated a tsunami and widespread subsidence along Pacific Northwest coastline. The tsunami deposited sandy sediments in many Oregon coastal estuaries, such as Alsea Bay. Although the recurrence of subduction-generated megathrust earthquakes and tsunami events in this region are recorded in the stratigraphy, knowledge of the full inland...
Resource Type:: Undergraduate Thesis

Are Immigrants Stealing American Jobs?: A Study of Unauthorized Immigration and Unemployment in the Southwest United States

Creator:: Giza, Alexandra C.
Abstract:: This research analyzes the effects of unauthorized immigration on unemployment levels in the states of Texas and California in the United States. Data from the Department of Homeland Security is utilized to best estimate the size of unauthorized populations. This research finds that a one person increase in the unauthorized...
Resource Type:: Research Paper

Effects of estuary characteristics and tsunami waveforms on transported sand sheets

Creator:: Armstrong, Emma M.
Abstract:: The details of the 1700 Cascadia Subdction Zone earthquake and tsunami can be better constrained using data from tsunami sand sheets, provided knowledge of the waveform, estuary geometry and bed roughness controls on the deposition pattern of the sand sheet. In this study, we use the hydrodynamic and sediment transport...
Resource Type:: Undergraduate Thesis

Analyzing the Incorporation of Cover Crops on a Tropical Island: Puerto Rico

Creator:: Torres Remigio, Angel
Abstract:: Puerto Rico’s climate varies greatly even if it is categorized as a tropical climate. On some parts of the island, there are desert like conditions where rainfall averages 36 inches a year unlike the western side or the central part of the island where rainfall averages 200 inches.1 Heavy rains...
Resource Type:: Poster

Freezing a Softly Repulsive Fluid : Monte Carlo Methods and the Weeks-Chandler-Andersen Potential

Creator:: May, Christopher
Abstract:: The equation of state for a fluid described by the Weeks-Chandler-Andersen (WCA) potential was solved to determine at what pressures and temperatures the fluid will theoretically freeze. A Monte Carlo (MC) algorithm was used to sample a system of 256 spheres for a set of thermodynamic averages to locate and...
Resource Type:: Undergraduate Thesis

Optical Analysis of Titania : Band Gaps of Brookite, Rutile and Anatase

Creator:: Lance, Ryan A.
Abstract:: The optical transition in high-fraction polymorphs of titania (TiO2) were investigated to determine the band gap behavior of the most common polymorphs—brookite, rutile, and anatase—the values of which are varied in the literature. The direct optical band gaps of brookite, rutile, and anatase, were determined to be 3.37(7)eV, 3.41(11)eV and...
Resource Type:: Undergraduate Thesis

Systematically evaluating the developmental toxicity of nanomaterials using the zebrafish model

Creator:: Edwards, Sabrina R.
Abstract:: As engineered nanomaterials (ENM) become more common in consumer products, it is crucial to rapidly assess toxicity of unique ENM. Previous studies rarely focused on standardizing nanotoxicity testing, leading to inconsistent and irreproducible results. This study characterized a variety of ENM of different size, shape, core type, and surface charge...
Resource Type:: Poster, Undergraduate Thesis, and Presentation

Synchronized Cellular Mechanosensing due to External Periodic Driving

Creator:: Chase, Katelyn J.
Abstract:: The response of cells to periodic driving is important for many biological processes, particularly blood flow and heart functioning. Our research analyzes the collective shear stress response of fibroblast cells due to a periodic driving frequency. When cells experience shear stress, they release calcium into the cytosol. To quantify the...
Resource Type:: Undergraduate Thesis

Beating Modes in Protostellar Disks

Creator:: Varga, Attila V.
Abstract:: Computational simulations of disks are becoming an important tool to predict the the evolution of protostars and disks to better understand the formation of planets. Past research has shown that the evolution of disks and their protostar can be altered through the interaction between gravity and hydrodynamic instabilities. We perform...
Resource Type:: Undergraduate Thesis

Brewing in the Medieval Period - How Beer and Ale Developed into a Commercial Industry

Creator:: Abbott, Marshall
Abstract:: This article analyzes how this transition occurred and what significant developments took place that allowed beer and ale to become a tradable and profitable good on the European market. Specifically, it examines the development of brewing as a tripartite progression: (a) that beer and ale were brewed in the 3...
Resource Type:: Research Paper

Familiarity in Face Recognition : What Does Our Brain Tell us?

Creator:: Lien, Mei-Ching
Abstract:: Previous behavioral studies have suggested that the automaticity of face recognition depends on familiarity. We sought converging evidence for this claim using electrophysiological measures. In Experiment 1, participants first rated their familiarity with 6 male celebrities. They then performed dual tasks in which Task 1 required a tone/noise discrimination. For...
Resource Type:: Poster

Identifying genes that influence the ability of Rhodococcus to benefit plants

Creator:: Lederhos, Heidi
Abstract:: Symbioses are intimate interactions between two different organisms. In a pathogenic interaction, one organism benefits and the other is generally harmed; whereas in a mutualistic interaction, the members reciprocally benefit. Rhodococcus is a genus of Gram-positive bacteria that persist in a variety of terrestrial and aquatic ecosystems. Although better known...
Resource Type:: Poster

Repair of a Scanning Tunneling Microscope and Retesting for the Formation of Pyramidal Structures Formed on Sputtered Germanium (110)

Creator:: Betz, Hazel R.
Abstract:: Semiconducting materials are of immense importance due to their presence in almost all modern devices. It is possible that the surface physics of semiconductors could be used to control the nanoscale topography and properties of these materials, ultimately creating new options for device fabrication. This could result in profound implications...
Resource Type:: Undergraduate Thesis
Date Created:

Changes in coral reef symbiont density during acclimation and stress

Creator:: Ton, Hayden, Dziedzic, Katherine, and Meyer, Eli
Abstract:: Coral reefs have become extremely vulnerable to rising ocean temperatures, with mass bleaching events increasing in frequency and severity. If bleaching events persist annually, models predict that more than 90% of reef species will face long-term degradation. However, recent evidence has shown that corals may be able to thermally acclimate...
Resource Type:: Poster

Effects of four irrigation treatments on twenty perennial forage species

Creator:: Thalhofer, Lauren M.
Abstract:: Freshwater resources are becoming more and more scarce worldwide, and rights to water use is becoming more competitive between stakeholders. Irrigation for agricultural purposes accounts for a large portion of freshwater usage. Using drought tolerant plant species in irrigated pastures could become a necessity in order to reduce competition for...
Resource Type:: Presentation
Date Created:

Social Assistive Robotics May Facilitate Positive Interactions for AAC Device Users and Their Conversation Partner : A Focus Group Study

Creator:: Stone, Hannah E.
Abstract:: A focus group format was used to investigate and identify favorable and unfavorable communications between two strangers, an AAC (Augmentative/Alternative Communication) device user and their communication partner. The principal interest was in the feedback gained from an ALS (Lou Gehrig’s disease) support group at the Salem Hospital which included participants...
Resource Type:: Poster
Date Created:

Derivation of Halide Bond Lengths through Fourier Transform Infrared Spectroscopy

Creator:: Gonzales, Seth
Abstract:: The physical properties of hydrochloric acid and deuterium chloride were derived through the use of the harmonic oscillator and rigid rotor quantum mechanical models. By first obtaining angular momentum quantum values for HCl and DCl through Fourier Transform Infrared Spectroscopy, these two systems could be summed and processed with additional...
Resource Type:: Research Paper

Project BoxSand : Impact of Online Course Material and Mastering Physics Interactions on Exam Performance in a Flipped Classroom Environment

Creator:: Bigelow, Jake J.
Abstract:: A flipped classroom provides students with course content in the form of videos, readings, and/or simulations that they complete during the time traditionally used for homework assignments while in-class time is devoted to hands-on group learning activities. Project BoxSand is gathering quantitative data on how students in a flipped classroom,...
Resource Type:: Undergraduate Thesis

Ocean acidification is causing increased predation on Mytilus californianus by specialist and generalist crabs

Creator:: Toner, Miranda M.
Abstract:: Ocean acidification is negatively impacting organisms that use calcium carbonate to form their shells. Increasing OA conditions are putting a strain on these calcareous animals by weakening their shells, thus causing them to become more vulnerable to predation. Worsening shell integrity may lead to a decline in hard-shelled prey populations...
Resource Type:: Research Paper

Epifaunal density differences on coralline algae compared to fleshy algae in the Yachats, Oregon intertidal community

Creator:: Gani, Christopher D.
Abstract:: Ocean acidification has led to many issues regarding the decline of calcifying organisms, such as coralline algae. Acidified sea water inhibits precipitation of CaCO3 that affects the structure and growth of coralline algae. Therefore, non-calcifying algae may outcompete calcifying algae in the intertidal systems with future acidic ocean condition. Variety...
Resource Type:: Research Paper

Weighty Tomes : An Analysis of Weight-Related Content in Introductory Psychology Books

Creator:: Watkins, Patti Lou, Methratta, Alexandra, Cook, Abiagail, Teresi, Andie, and Gerber, Madison Rae
Abstract:: Weight bias has dramatically increased over the last 20 years and is as prevalent as bias based on race and gender. The media is a primary source of weight bias according to a review of weight-related content within newspapers, popular press books, television, and movies. Bias is perpetuated through messages...
Resource Type:: Presentation

A Simple Leapfrog Integration Scheme to Find Optimal Interplanetary Trajectories

Creator:: Kelley, Scott M.
Abstract:: The calculation of interplanetary trajectories is a numeric problem which requires a high degree of precision for the results to be accurate. A computer program was written for this project which uses leapfrog integration combined with Newton’s method of iterative root finding to find ideal interplanetary trajectories. Reasonable initial conditions...
Resource Type:: Undergraduate Thesis

Simulating dynein’s powerstroke using Brownian dynamics

Creator:: Capek, Elliott L.
Abstract:: Dynein is a motor protein which transports cargo along tracks inside the cell. Like related motor proteins kinesin and myosin, dynein uses cellular energy to take steps with its two foot domains. Unlike kinesin or myosin, dynein’s stepping pattern is highly varied: it can take steps between zero and 60nm...
Resource Type:: Undergraduate Thesis

Testing, Development, and First Results of a Method for Measurement of the Isotropy of the One-Way Speed of Light.

Creator:: Nowak, Gabriel
Abstract:: The standard model (SM) of particle physics describes many of the experimentally observed subatomic particle interactions. However, there are a few discrepancies with the SM namely: matter/antimatter asymmetry and dark energy. A current extension of the SM allows for small amounts of Lorentz Violation to fix these discrepancies. Lorentz Violating...
Resource Type:: Undergraduate Thesis

Simulating dynein’s powerstroke using Brownian dynamics

Creator:: Capek, Elliott
Abstract:: Dynein is a motor protein which transports cargo along tracks inside the cell. Like related motor proteins kinesin and myosin, dynein uses cellular energy to take steps with its two foot domains. Unlike kinesin or myosin, dynein’s stepping pattern is highly varied: it can take steps between zero and 60nm...
Resource Type:: Undergraduate Thesis

Modelling Gravitationally Coupled Modes of High Stellar Mass Protostellar Star-Disk Systems

Creator:: Ahmed, Aneeq
Abstract:: We computationally modeled protostellar star-disk systems with star to disk mass ratio of 10. Our computational models looked at the development of density perturbations in these systems for different geometries of the system. The ratio of the star’s height and radius (rₚ/rₑ) is varied between 0.1746 and 0.88095. We modeled...
Resource Type:: Undergraduate Thesis

Identifying gaps in competencies between graduates and entry- level Positions & improvement recommendations

Creator:: Martin, Ryley M.
Abstract:: Research of an outreach to industry alumni to identify weak points in our graduates competencies and attempting to close those gaps through various recommending various resources for the administration to offer.
Resource Type:: Poster

Urinary Lipid Biomarkers for Detecting Canine Transitional Cell Carcinoma Pilot Study

Creator:: Pope, George
Abstract:: Canine Transitional Cell Carcinoma (TCC) makes up 2% of all canine cancers and is the most common cancer of the bladder for dogs. Usually diagnosed in its later stages, TCC is difficult to treat, with low survival times. Current diagnosis involves invasive techniques, and mainstream screening tests are often ineffective....
Resource Type:: Undergraduate Thesis and Presentation

Effect of Flaxseed Supplementation with and without Rumen-Bypass Processing on Performance and Milk and Serum Fatty Acid Composition of Dairy Cows

Creator:: Wilson, Randi L.
Abstract:: Feeding cows flaxseed rich in polyunsaturated fatty acids has been shown to decrease the proportion of saturated fatty acids and increase the proportion of n-3 polyunsaturated fatty acids (PUFAs) in milk. Consuming products enriched in n-3 PUFAs have beneficial effects to human health; thus, feeding cows flaxseed could potentially increase...
Resource Type:: Undergraduate Thesis and Presentation

"The un-bee-lieveable need for consistent population surveying"

Creator:: Price, Briana E.
Abstract:: Lightning Talk
Resource Type:: Presentation

Honey Bees (Apis mellifera) and Agricultural Chemicals: Global to Micro Perspectives

Creator:: Bernert, Ann
Abstract:: Fungicide sensitivity of honey bee associated fungi Abstract - Honey bees are exposed to a wide range of pesticides while pollinating agricultural crops. These pesticides residues are found in beeswax, nectar and pollen in the hive. Some of the pesticides found are fungicides which are not generally considered harmful to...
Resource Type:: Undergraduate Thesis

Stratigraphic Correlation of Late Cretaceous Volcanic Rocks along the Eastern Flank of the Boulder Batholith, Southwestern Montana

Creator:: Kallio, Ian
Abstract:: The Boulder Batholith and Elkhorn Mountains Volcanics (EMV) formed concurrently during shortening between ~85-76 Ma near the end of Mesozoic Cordillera arc magmatism. Together they represent an exceptionally well-preserved and voluminous record of continental arc magmatism. We report field and analytical results from studies of the EMV and Boulder Batholith...
Resource Type:: Undergraduate Thesis

Study of Organic Semiconductors Using Time-Resolved Charge Measurements at the Microscale

Creator:: Wallace, Richard
Abstract:: Understanding charge transfer in organic semiconductors is important for developing devices like organic light emitting diodes and flexible electronics. Optical tweezers have been used in many disciplines for trapping, manipulating, and analyzing microscopic objects such as microspheres, micro-organisms, and other colloidal particles. Using optical tweezers, studies have measured the average...
Resource Type:: Undergraduate Thesis

Complex Index of Refraction of Multi-walled Carbon Nanotubes in Strong Terahertz Fields

Creator:: McCuen, Dalton R.
Abstract:: Carbon nanotubes are the subject of intense interest in virtually every field, from medicine to nano-scale electrical components. Multi-walled nanotubes exhibit a strong nonlinear response to high-field strength terahertz radiation. This research uses terahertz pulses with field strength exceeding 1 MV/cm generated by means of optical rectification utilizing a lithium...
Resource Type:: Undergraduate Thesis

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