Index Catalog // ScholarsArchive@OSU

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

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

Toxicity Screening of Polycyclic Aromatic Hydrocarbons (PAHs) in Primary Human Bronchial Epithelial Cells

Creator:: Amador, Samantha B.
Abstract:: Polycyclic aromatic hydrocarbons (PAHs) are a known class of chemicals that are linked to a multitude of adverse health outcomes. There are over 1,500 of these chemicals across various families and subgroups. 16 of these PAHs, known as parent PAHs, are identified by the EPA for focused risk assessment within...
Resource Type:: Undergraduate Thesis

Soil Fire Ecology: Assessing Wildfire Severity Impacts on Pacific Northwest Forest Soil Carbon

Creator:: Fleetwood, Shea
Abstract:: Pacific Northwest temperate rainforests are anticipated to experience increasingly frequent and severe wildfires in the foreseeable future due to climate change, increased fuel loads, and deforestation. Soil, underlying these forests, is the largest terrestrial carbon (“C”) reservoir. Fire disturbance influences soil C persistence, the timeframe and magnitude of which remain...
Resource Type:: Undergraduate Thesis

A Needs Assessment of Social Emotional Learning Integration in Pre-College STEM Education at OSU

Creator:: Rodriguez Cardoso, Metzin A.
Abstract:: STEM education is delivered to K12 audiences by Pre-college Programs across the nation, many of which serve underrepresented and underserved students as part of their core missions. While there is robust attention to STEM curriculum development and college connection events in such programs, few have social-cultural aspects of learning as...
Resource Type:: Undergraduate Thesis

A Comparison of Ammonia Inhibition on the Anaerobic Digestion of Organic Acids Between Digestate from Anaerobic Co- and Mono-Digestion Systems

Creator:: Ruiz-Orozco, Gloria
Abstract:: Anaerobic digestion is a common terminal step in wastewater treatment systems and produces valuable by-products such as biogas, a combination of carbon dioxide and methane. Biogas can be used to off-set energy costs, and along with the anaerobic co-digestion of fats, oils, and greases (FOG) has been found to increase...
Resource Type:: Undergraduate Thesis

Detection and Identification of Acetaminophen (Tylenol) Metabolites using Liquid Chromatography High Resolution Mass Spectrometry (LC-HRMS/MS) Analysis

Creator:: Sanchez, Karina M.
Abstract:: Acetaminophen (APAP) is a commonly used analgesic and antipyretic drug that can cause liver injury, liver necrosis, and liver failure. APAP-induced liver failure (AILF) is associated with depletion of glutathione and the increased formation of APAP protein adducts from the toxic NAPQI metabolite. There is a hypothesized detoxifying pathway where...
Resource Type:: Undergraduate Thesis

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

Predation enhances survival and growth of pathogenic and non-pathogenic isolates of Vibrio cholerae

Creator:: Solis-Ruiz, Jose M.
Abstract:: Vibrio cholerae a major health problem in developing countries because of its ability to cause the disease cholera in humans. As V. cholerae bacteria are common inhabitants of temperate marine and brackish water environments worldwide, they are subject to intense top-down pressure by amoebae, which can affect their survival and...
Resource Type:: Undergraduate Thesis and Presentation

Recycling Potential of Sequential Hydrothermal Liquefaction Aqueous Co-Product Using Chlorella vulgaris

Creator:: Wallach, William J.
Abstract:: Bio-oil from hydrothermal liquefaction (HTL) represents a promising fuel source due to large higher heating values and compatibility with current energy infrastructure. For bio-oil production to become commercially viable, novel methods of co-product recycling must be explored. The aims of this study were to culture Chlorella vulgaris, a common HTL...
Resource Type:: Undergraduate Thesis and Presentation

Case studies : Using the zebrafish to evaluate neurobehavioral phenotypes

Creator:: Garcia, Abraham, Truong, Lisa, Johnson, Eric, Tanguay, Robert L., and Knecht, Andrea
Abstract:: The use of zebrafish in behavioral neuroscience is rapidly growing. Zebrafish can be assessed for alterations in multiple behavioral endpoints, creating opportunities to use this powerful model to identify chemicals that alter behavioral phenotypes. To evaluate the utility of zebrafish for neurotoxicity research, we designed custom instrumentation to evaluate numerous...
Resource Type:: Undergraduate Thesis and Presentation

Genetic analysis of BYVD resistance and low temperature tolerance in winter x spring barley crosses

Creator:: Zitzewitz, Jarislav W. von
Abstract:: The development of winter 6-row malting barley varieties is an objective of the OSU program. The program's winter germplasm is quite susceptible to Barley Yellow Dwarf Virus (BYDV). The program recently released the spring 2-row variety Orca, which carries the Yd2 gene for BYDV resistance. The objective of this project...
Resource Type:: Undergraduate Thesis

Genetic diversity of Frankia in three different Oregon soils with co-occurring actinorhizal hosts

Creator:: Shaffar, Sarah J.
Abstract:: Little is known about Frankia, a gram-positive, nitrogen-fixing bacterium, because of the difficulty associated with isolating pure cultures. This nitrogen-fixing symbiosis involves Frankia and the roots of actinorhizal host plants belonging to eight plant families and 25 genera. These plants are important pioneer species traditionally found in nitrogen-poor soils and....
Resource Type:: Undergraduate Thesis

DNA mismatch repair and cancer : Identifying phenotypic consequences of hMLHI mutations

Creator:: Nice, Benjamin T.
Resource Type:: Undergraduate Thesis

Indole-3-carbinol and related compound effects on biochemical parameters with respect to trout tumorigenesis

Creator:: Hall, Kelly P.
Abstract:: Indole-3-carbinol (13C), a metabolite of glucobrassicin, is found in cruciferous vegetables. It is able to act as an inhibitor or promoter of carcinogenesis depending on the species, the carcinogen and when it is given in relation to the carcinogen. This is probably due to the fact that it reacts in...
Resource Type:: Undergraduate Thesis

Fate of ¹⁵N-labelled atrazine in a wetland mesocosm, Fate of [superscript 15] N-labelled atrazine in a wetland mesocosm

Creator:: Corliss, Dorian
Resource Type:: Undergraduate Thesis

Evaluation of popcorn cultivars as resistant rotation crops to Columbia root-knot nematode : A systems approach

Creator:: Cardwell, Derek
Abstract:: This study examined the management situation for the Columbiaroot-knot nematode (Meloidogyne chitwoodi) in potato, using an approach with systems thinking and interactive meetings. The focus of current research for control of this nematode was evaluated. Control practices include crop rotation, and this study also evaluated popcorn cultivars for their potential...
Resource Type:: Undergraduate Thesis

DNA mismatch repair and 0[superscript 6]-methylguanine toxicity : Testing the futile repair cycle hypothesis

Creator:: Brodeur, Timothy J.
Abstract:: Cell lines deficient in certain genes of the DNA mismatch repair (MMR) system show a marked resistance to the cell killing or apoptotic effects of DNA alkylating agents. The molecular mechanism for this resistance is not yet understood, but is currently of great interest because of the recent use of...
Resource Type:: Undergraduate Thesis

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