Index Catalog // ScholarsArchive@OSU

Assessing Petal-cutting bees (Megachile sp.) usage of Clarkia amoena (Onagraceae) petals through the lens of iNaturalist and a Garden Experiment

Creator:: Mead, Mallory
Abstract:: Farewell-to-spring (Clarkia amoena) is native to the Pacific Northwest and commonly found in gardens, due to its aesthetic value and purported benefits to pollinators. Oregon and Washington are home to five subspecies of C. amoena, yet commercially available seed is limited to C. amoena ssp. lindleyi and C. amoena cultivars....
Resource Type:: Undergraduate Thesis

Predicting the Percentage: Relating the Refractive Index to Effective Medium Theory in Combination Dielectric Films

Creator:: Farmer, Skylar
Abstract:: Transparent conductive oxides (TCO) are at the forefront of technology with their uses in touch screen phones and televisions, solar cells and more. Titanium dioxide and tin dioxide are two TCOs that have been studied in depth on their own, so to further explore these TCOs, this project focuses on...
Resource Type:: Undergraduate Thesis

Checking for Noise Model Consistency Between the NANOGrav 12.5- and 15-Year Data Sets

Creator:: Ashby, Andrew
Abstract:: The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) is an international collaboration that seeks to use perturbations in the time of arrivals of pulsar signals to detect gravitational waves in the nanohertz range of frequencies. The 15-year data set will be released as of June 2023. It is a...
Resource Type:: Undergraduate Thesis

Gene expression analysis in feline injection-site sarcoma : differential expression of the ΔNp63 and TAp63 isoforms

Creator:: Dien, Thalia
Abstract:: Background Feline injection-site sarcoma (FISS) is a rare and aggressive tumor associated with vaccines, drug injections, and skin trauma in cats. The understanding of FISS remains limited, posing challenges in its diagnosis, treatment, and prevention. In this study, we analyzed the differential expression of miRNAs and their target genes in...
Resource Type:: Undergraduate Thesis

Aluminum Tolerance of Winter Wheat

Creator:: Sadler, Cameron
Abstract:: Wheat is an important part of a healthy and balanced diet, requiring six servings per day to maintain a recommended 2000 Calorie intake (McRae, 2017). Because of this more land than almost any other kind of cereal is set aside for the purposes of growing wheat. To keep up with...
Resource Type:: Undergraduate Thesis

Computational study of the structure of indium alloys at low temperatures using ab initio methods

Creator:: Shin, Hongsik (Jay)
Abstract:: Crystals are solid materials with periodic and symmetric molecular patterns. The structure of a crystalline solid determines its properties, making it essential to study its structures. From the principle of minimum energy, a crystal will choose a structure with the lowest free energy F = U – TS. At low...
Resource Type:: Undergraduate Thesis

Monitoring Onion Thrips Response to Insecticide Agri-Mek SC in the Treasure Valley of Eastern Oregon and Western Idaho

Creator:: Flores Elizondo, Dennet
Abstract:: Onion thrips (Thrips tabaci) are pests found in onion fields of the Treasure Valley, which is located in Eastern Oregon and Western Idaho. Thrips cause damage to this high value crop by feeding on the onion’s extracellular fluid, making photosynthesis more difficult to occur. The feeding from the thrips can...
Resource Type:: Undergraduate Thesis

Using the Langevin Equation to Verify a Single-Particle Brownian Motion Simulation

Creator:: Snyder, Brendan
Abstract:: Brownian motion is the movement of a particle in a fluid resulting from collisions with surrounding molecules. It has modern applications in simulating fluid dynamics and the motion of proteins in biophysics. Brownian motion simulations generally evolve the initial state by applying Newton’s second law to every particle. These simulations...
Resource Type:: Undergraduate Thesis

Time resolved terahertz spectroscopy of photocarrier dynamics in WSe2

Creator:: Johnson, Nathan
Abstract:: Semiconductors serve an integral role in our technologies today. However, with new advancements in ultra-fast electronics, we are approaching the fundamental speed limits of traditional silicon-based semiconductors. Silicon-based semiconductors typically exhibit photocarrier dynamics in nanosecond timescales. Transition metal dichalcogenides (TMDs) are 2D materials shown to exhibit photocarrier dynamics in picosecond...
Resource Type:: Undergraduate Thesis

Utilization of structure-activity-relationship for predicting chemical toxicity in primary human lung cells

Creator:: Galbreath, Amanda
Abstract:: There is a growing need to establish alternative approaches for assessing hazard from chemical exposure compared to the traditional method of animal testing. Approaches that relate chemical structure to biological activity are gaining acceptance in the field as in silico methods for characterizing and predicting chemical toxicity. In this study,...
Resource Type:: Undergraduate Thesis

Development of a diagnostic assay for Phytophthora ramorum lineage detection

Creator:: Roig-Paul, Mireia
Abstract:: Phytophthora ramorum is the causal agent of Sudden Oak Death (SOD), which is an economically and environmentally important disease causing up to 80% mortality of tanoaks in Pacific Northwest coastal forests (LeBoldus et al., 2022). There are currently four clonal lineages in the United States and Europe, named North America...
Resource Type:: Undergraduate Thesis

Developing a hemp dihaploid protocol

Creator:: Murphy, Sean K.
Abstract:: Cannabis production has gained popularity over the last 10 years. There is a growing demand for true-to-type grain, fiber, and resin crops. Breeding for homozygous trait development with traditional methods can take as long as 8 years. With dihaploid breeding, homozygosity can be achieved in 2 generations saving breeders time...
Resource Type:: Undergraduate Thesis

Computational study of the electrostatic interaction between kinesin-5/BimC and the microtubule

Creator:: Chen, Zishi
Resource Type:: Undergraduate Thesis

Modeling optical reflection and electric field intensity in organic semiconductor microcavities

Creator:: Munk, Rebecca
Abstract:: Organic semiconductors are a promising alternative to the traditional inorganic semiconductors, such as silicon. Organics are solution-processable, low-cost, sustainable, and have interesting optoelectronic properties. One such property is the formation of exciton-polaritons, quantum quasi-particles formed by an electron-hole pair in the semiconductor and a photon. This process can be induced...
Resource Type:: Undergraduate Thesis

Exploring the Growth Habits of Sweetpotatoes (Ipomoea batatas) in the Willamette Valley of Western Oregon

Creator:: Epps, Charlotte
Abstract:: Sweetpotatoes are a highly nutritious staple crop, playing an important role in global nutritional security. Although the majority of research in the United States (U.S.) focuses on the cultivation of the storage roots, both the leaves and roots are edible. Sweetpotatoes are indigenous to the Andes Region of South America;...
Resource Type:: Undergraduate Thesis

The effect of alternating current on the resistance and reactance of iron and steel wires

Creator:: Eckley, Winfield
Abstract:: During the past year the rapid increase in the cost of copper and aluminum has led operating companies to investigate the feasibility of using iron and steel conductors for transmission and distribution purposes where small blocks of power are to be served. This Thesis gives the results of tests on...
Resource Type:: Undergraduate Thesis

A comparison of the theoretical and practical components of the US and German higher-education systems; what we can learn from the German approach to better prepare our students for ever-changing technologies

Creator:: Brownell, Eugene Baars
Abstract:: The curriculum of technical degrees at higher education institutions in the United States needs to continuously adapt to ever changing technologies. One way to accomplish this is to adopt a more dynamic approach that separates the practical and theoretical components of the university education, and where the student concentrates on...
Resource Type:: Undergraduate Thesis

Ovarian protein hormones as biomarkers of fertility in dairy cows – Is it an acceptable model to predict infertility in dairy breeds?

Creator:: Lopez, Ruben
Abstract:: Female dairy cattle are particularly prone to infertility/subfertility with pregnancy rates ranging as low as 27% to a high 40%. On average it takes more than one breeding/insemination event for dairy cattle to become pregnant. This results in a loss of the number of calves a female would have per...
Resource Type:: Undergraduate Thesis

Anti-Mullerian Hormone (AMH) Levels Are Reduced by Age, But Do Not Correlate With Pregnancy In Timed-Mated Rhesus Monkey Females (Macaca mulatta)

Creator:: Roth, Maggie
Abstract:: Infertility is an issue affecting millions of women across the globe, yet the causes are not fully understood, and treatment options are often ineffective. The evaluation of reproductive hormones has been a common tool used by fertility clinics as a way to predict the ovarian response to treatment and gain...
Resource Type:: Undergraduate Thesis

Monitoring Resistance in Onion Thrips to Insecticides, Lannate® and Exirel®, in the Treasure Valley of Eastern Oregon and Southwestern Idaho

Creator:: Sanchez, Kevin
Abstract:: To evaluate and monitor insecticide resistance in onion thrips Thrips tabaci on onion (Allium cepa), we conducted a study using three field populations in the Treasure Valley of eastern Oregon and southwestern Idaho using the insecticides Lannate (methomyl) and Exirel (cyantraniliprole). To evaluate these two insecticides, biological assays were conducted...
Resource Type:: Undergraduate Thesis

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