By emulating natural disturbances such as wildfire, managers hope to maintain biodiversity in managed forests. Leaving residual (live) trees in harvested areas is key to this strategy. However, the effectiveness of this approach is unknown. I surveyed songbirds in 176 stands in the Rocky Mountains of southeastern British Columbia, Canada,...
The FOCUS (Forest, Organisms, Creeks yoU Study) field trip program was developed to provide elementary students in Benton County, Oregon with a hands-on, environmental education experience at Beazell Memorial Forest. Students participated in activities dedicated to specific habitats and organisms found at Beazell that built upon their learning at school....
The micronutrient zinc (Zn) plays a key role in the animal and plant kingdoms. Zndeficient soils impact plant production and can cause yield reductions of 40% or more. Zn is also important for both human and plant development as a cofactor for over 200 enzymes. Zn-deficiency symptoms in plants include...
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Kari van Zee
The micronutrient zinc (Zn) plays a key role in the animal and plant kingdoms
Two forest management objectives being debated in the context of federally managed landscapes in the US Pacific Northwest involve a perceived trade-off between fire restoration and C sequestration. The former strategy would reduce fuel (and therefore C) that has accumulated through a century of fire suppression and exclusion that has...
The use of electronic cigarettes (often referred to as vapes or e-cigs) has grown rapidly in the past decade. While these devices may not deliver the same level of carcinogens and toxicants as combustible cigarettes, they can deliver nicotine (a known developmental toxicant) as efficiently. Previous work suggests that, during...
Weight-based stigmatization (WBS) exists in healthcare and can be categorized as direct, indirect, or structural. WBS is harmful to individual’s health and contributes to worse healthcare engagement, including reduced care satisfaction, patient-centered communication (PCC), and utilization of services. Little is known about young adults’ experiences of WBS in healthcare. Young...
After a 40-year absence from Oregon’s landscape, expanding gray wolf (Canis lupus) populations are reestablishing elements of interspecific competition with sympatric large carnivores, like cougars (Puma concolor). This presents new challenges for management of large carnivores and their ungulate prey populations (e.g., elk, Cervus canadensis nelsoni; mule deer, Odocoileus hemionus)...
Southeast Alaska is located on the traditional territory of the Lingít, Haida, and Tsimshian People. It is comprised of the largest temperate rainforest in the world, with subregions receiving over 500 cm of rain annually. Climate change is predicted to alter the region's timing, type, and magnitude of precipitation and...
Metabolic syndrome (MetS) and abdominal obesity (AbOb) increase the risk of
developing cardiovascular disease and diabetes. Energy restriction (ER), highprotein
(PRO) intake and high-intensity interval training (HIT) can independently
improve MetS and AbOb. However, ER reduces metabolically active lean body
mass (LBM) in addition to body fat (BF). Purpose: To...
Belowground carbon (C) storage and quality of soil organic matter (SOM) in
forest soils have implications for sustainable forest management and C sequestration,
but how these pools change in response to management is poorly understood. I
investigated whether fertilization and competing vegetation control, applied alone or
in combination early in...
Quantifying and modeling processes involved in the global carbon cycle is important to evaluate the temporal and spatial variability of these processes and understand the effect of this variability on future response to changing climate and land use patterns. Biomass accumulation and Net Primary Productivity (NPP) are large components of...
Drinking water access is a global concern. While drinking water is widely available in much of the U.S., there are still vulnerable communities that lack access, which signifies the presence of inequity in drinking water access distributions. In response, this research sought to explore solutions and develop reconnaissance-level plans to...
PRC2 (Polycomb Repressive Complex 2) mediated gene silencing plays an important role in cell differentiation, stem cell plasticity, and tumor suppression. In fungi, it is also involved in pathogenicity. The catalytic subunit, KMT6, trimethylates lysine 27 on histone h3 (H3K27me3) at loci targeted for silencing. In animals, PRC1 and PRC2...
Background:
There are over four billion YouTube views per day with “music” the most searched topic. Among US internet users, 8.3 million YouTube users are under 18 years old. Incorporation of substance use imagery in YouTube videos has a considerable potential influence on young viewing audience behavior. This study identifies...
Background: Body Mass Index (BMI) is used as a quick and inexpensive tool to measure populations at risk for a number of metabolic and chronic conditions. In part due to its simplicity, BMI has been criticized for its inaccurate prediction concerning health outcomes. Due to the diversity in the United...
YouTube is a free video watching and uploading site that allows endorsing and
sharing of videos. Youth and adolescents as top viewers of YouTube may be exposed to
images and messages on tobacco, marijuana and alcohol use behaviors.
The research project entailed deriving a list of songs from the 2014...
In the United States, rates of youth vaping are alarmingly high. In 2018, the U.S. Surgeon General declared youth vaping as an epidemic (Centers for Disease Control and Prevention [CDC], 2022b). However, LGBTQ+ youth are disproportionately affected. In 2021, current e-cigarette use among high schoolers was 16% with heterosexual students...
The lower Willamette River, located between river mile 4.0
and 26.5, is the most seriously polluted section of the Willamette
River Basin.
Low dissolved oxygen concentrations of 2.0 to 3.0 mg/1 are
observed annually in this section of the river due to the pollutional
loads discharged into it. Waste discharges...
Fowl sperm are believed to be immotile prior to ejaculation. The concentration of
potassium found in deferent duct fluid is approximately 8 times higher than that found
in blood plasma, which is 5 mM in Gallus domesticus. The effect of ionic potassium
on fowl sperm motion was tested in a...
Industries such as science, technology, engineering and mathematics (STEM), continue to employ fewer women compared to men. These professions that are traditionally considered more masculine sustain gender-imbalanced work forces and are also unattractive to women at an academic level. This thesis explores the hypothesis that performance can be a powerful...
There is a strong campaign underway to promote increased physical
activity among the U.S. population. The U.S. Surgeon General and the U.S.
Dietary Guidelines have presented physical activity recommendations in terms
of the amount of time accumulated in physical activity and/or in terms of
energy expenditure over the course of...
Rates of electronic cigarettes (or “e-cigarettes”) use among youth are so high that the Surgeon General declared them to be of “epidemic proportions” (A Report of the Surgeon General, 2012). If these rates go unchanged, e-cigarettes will likely be responsible for the creation of a new generation of combustible cigarette...
Histones, as part of nucleosomes, are responsible for DNA packaging in chromosomes. They also affect DNA expression by a multitude of post-translational modifications, especially prevalent on the amino terminus of histones. Co-activator protein complexes “write”, “read”, or “erase” histone modifications, and in balance determine which sections of DNA are free...
In the first experiment the minimum dietary toxic levels of vitamin A were determined in pregnant rabbits over three parities. The treatments consisted of basal diet plus 10,000, 30,000, 60,000, and 90,000 IU/Kg added vitamin A. The basal diet was formulated to be free of vitamin A and beta-carotene; rice...
Aging is a major risk factor for the deterioration of biochemical pathways that lead to many chronic neurodegenerative disorders (i.e. Parkinson’s and Alzheimer's Disease). Cellular senescence is a hallmark of aging, a condition characterized by stable growth arrest resulting in a cell that no longer divides, but is metabolically active....
Silicic caldera-forming eruptions are some of the largest and most destructive volcanic eruptions known, and present significant local and global hazards. The underlying processes within crustal magma plumbing systems that lead to the accumulation and eruption of large volumes of evolved magma remain enigmatic, yet there is broad consensus that...
Purpose: Many programs are available to engage people in health-promoting behaviors or behavior change, but most target specific behavior outcomes (e.g., weight loss, smoking cessation) rather than wellness. This study aimed to assess the effectiveness of a tracking-based health challenge focused on overall wellness, with or without peer support.
Methods:...
At This Point, an undergraduate-focused science podcast, works to expand the accessibility of science by exploring topics that, at this point, may seem too complex to understand. This thesis project describes the process of creating At This Point and demonstrates how the podcast fulfills the criteria of effective science communication....
Coarse woody debris (CWD, comprised of snags and downed logs) is an important component of the structure and function of forest ecosystems, one which both influences the availability of fuel for wildfires and can be a result of wildfires. We studied snag persistence, and changes in mass of CWD in...
The following text is a consolidated version of the Cakrasaṃvara Samādhi, along with the Guru Maṇḍala, Sūryārgha, Pañcagavya, Guru Pādārgha, Kāybhaḥ Pūjā, Rahasya Pūjā, Kalaśa Pūjā, Vāruṇī Pūjā, Bali Pūjā, Kīgaḥ Tine, and a Pātra Jñāna. The Cakrasaṃvara Samādhi, as has been discussed above, is the primary pūjā and sādhanā...
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Stuart Sarbacker
The following text is a consolidated version of the Cakrasaṃvara Samādhi, along
This work is concerned with determining whether nicotine has a role in promoting oxidative damage in human tissue, particularly in lung tissue. This follows from recent reports of a novel lung disease found in some E-cigarette users, characterized by oxidative damage and elevated levels of neutrophils (termed “vaping disease”). It...
The Andrews Forest Long-Term Ecological Research (LTER) site has a long-term partnership with the University of Oregon Environmental Leadership Program (ELP), providing service-learning opportunities for undergraduate students to facilitate field trips for middle school students to the Andrews LTER site. Undergraduate students develop field trip lessons based on Andrews Forest...
The Polycomb Repressive Complex 2 (PRC2) catalyzes genome transcription repression through the methylation of lysine residue 27 in the amino terminal region of histone 3 (H3K27me1/2/3) [2], [7]. PRC2 is made up of three highly conserved core subunits: Kmt6, Eed, and Suz12. Accurate distribution of PRC2 is essential for proper...
The STEM Research Center at Oregon State University was invited by Guerilla Science and Pratt Institute to evaluate the professional development experiences for two cohorts of science and art professionals. Each professional development experience consisted of a three-day workshop and field experience in August and September 2019. We used workshop...
This research examines women's magazine editors' perspectives of the relationship between editorial and advertising content in women's magazines. It specifically investigates how this relationship affects both general editorial content and more specifically, social topic stories. Mainstream women's beauty/fashion magazine editors—including editors-in-chief—were queried as to the nature of these relationships. Interviews...
Otoferlin is a protein that is essential in the process of hearing. Mutations in otoferlin are associated with profound recessive deafness. The long-term goal of the Johnson lab is to understand how otoferlin contributes to hearing and why certain mutations result in deafness. This project sought to characterize the difference...
Bacteria are abundant in marine environments. They play important roles in nutrient cycling and form symbiotic interactions with eukaryotes. However, the vast majority of bacterial taxa are difficult to maintain in laboratory cultures, meaning that most microbiological research of the past century has focused on a small subset of bacteria....
With a national policy on catch shares in progress in the United States and
increasing use of transferable fishing rights in fisheries worldwide, it is
important to understand how the markets created by these programs
function in the real world. This paper presents information collected from
interviews with Florida spiny...
All of the data was collected at the FIGMENT art festival in New York City on June 23 and 24, 2018. The data was collected through: 1) paper survey for attendees to Guerilla Science activities, 2) short interviews (entry and exit) for attendees to Guerilla Science activities, and 3) short...
Creative projects at the interface of science and art can be appealing to both science-interested and art-interested audiences. They therefore present a unique opportunity to connect with cultural and learning identities of a wide range of people, and to preach beyond the already-interested and science-engaged “choir” that make up a...
Windthrow has been studied extensively as a cause of mortality and as a landscape
disturbance agent in temperate forests throughout the United States. The effects of
windthrow mortality on stand species composition and structure, forest regeneration and
seral development have been well described at the site (e.g. single gap) and...
Novel mucosal vaccines (LL-M2e, LL-HAe, SG-HAe) were constructed from live, non-pathogenic Lactococcus lactis or Streptococcus gordonii that express conserved regions of HA or M2 antigens from avian influenza virus (AIV) A. All three vaccines evoked antigen-specific serum immunoglobulin G (IgG) responses in vaccinated chickens. The addition of the adjuvant cholera...
The central purposes of this study were to review the
historical sources of David Kolb's formulation of experiential
learning theory, and to determine the effect and
application of Kolb's theory and Learning Style Inventory
as reflected in the literature between 1971 and 1990.
It was found that Kolb based his...
Bruno Latour’s Facing Gaia provokes us to embrace our Earthboundedness to approach the problematic political ecologies of the Anthropocene. Latour’s call for the Earthbound is to re-trace networks of society, institutions, and meaning and to challenge, as enemy, those that would continue to behave as if we lived on more...
Patients with end-stage renal disease undergoing hemodialysis have a high incidence of oxidative stress-related diseases. This study evaluated oxidative stress and inflammatory markers in patients undergoing hemodialysis before and during vitamin E supplementation. Blood samples were obtained before and after dialysis during two separate dialysis sessions to establish baseline measurements....
The Leeuwin Current in the Indian Ocean off Western Australia differs from the other major eastern boundary currents, e.g., California Current, since it flows rapidly poleward against the prevailing equatorward wind. The first large-scale study of the Leeuwin Current was conducted between North West Cape (22°S) and the south-western corner...
Environmental education programs seek to foster an appreciation for the natural world while introducing students to scientific thinking. Citizen science engages non-scientists in the systematic collection and analysis of data. The Betts Forest Landscape Ecology Lab combines both goals by inviting teachers in Corvallis, Oregon, and surrounding areas to participate...
Enduracidin is an antibiotic produced by Streptomyces fungicidicus that is effective against Gram-positive bacteria. Previous work identified seventy-eight mutations in an S. fungicidicus strain that produces a significantly higher level of enduracidin than the wild type strain, ATCC 21013. Eleven mutations were analyzed individually to identify those that may contribute...
Plant pathogenic Rhodococcus species are persistent pathogens able to cause severe growth deformities on a large range of hosts. The most well studied species, R. fascians is predicted by current models to synthesize a mixture of cytokinins that act to directly perturb the hosts' hormone balances, which results in abnormal...
Advancements in molecular biology and computer science have enabled researchers the ability to investigate the transcriptome – the quantification of an organism’s RNA transcripts in response to its environment on a system wide scale. The collective chapters of this thesis utilize high-throughput RNA sequencing, which produces hundreds of millions of...
The Pentatricopeptide Repeat (PPR) gene family produces RNA-binding proteins that target organellar transcripts. The PPR family is expanded in land plants, with nearly 450 genes identified in Arabidopsis thaliana. In plants with a Cytoplasmic Male Sterility (CMS) phenotype, members of the PPR family can act as a RESTORER OF FERTILITY...
Nanoparticles (NPs), particles defined by their size in a single dimension (1-100 nm), are being increasingly incorporated into commercial and industrial products due to their high surface area to volume ratio that gives them unique properties, such as optical tunability and higher reactivity than their bulk counterparts. NPs can be...
Many female undergraduate students engage in disordered eating, an umbrella term for sub clinical behaviors such as food restriction, binge eating, over exercising, and general preoccupation with food, weight, and body. Depending on the type of behavior and the length of time engaged with the behavior, disordered eating behaviors can...
Anecdotal evidence suggests that “learning in the field” has distinctive benefits to undergraduate education, but direct evidence about these benefits and effective practices in field-based science education is limited. The Undergraduate Field Experiences Research Network (UFERN) aims to address this gap as well as the opportunity for broadening participation in...
Rice is an important crop that feeds almost half the world population. As climate change models predict floods, drought and extreme temperatures in rice production areas, the need to better understand the genetic basis of adaptation and tolerance to abiotic and biotic stresses is vital to sustain our food supply....
Implementation climate is the most proximal organizational predictor of implementation success. First-level supervisors are in a pivotal position to influence implementation climate, as they directly oversee frontline staff who deliver evidence-based interventions (EBIs). First-level supervisors who exhibit strong leadership and utilize best practices in supervision may be able to establish...
The Center for Research on Lifelong STEM Learning was invited by the Oregon State University Extension Service 4-H Youth Development and the Portland Metro STEM Partnership to evaluate Year 2 of the STEM Beyond School (SBS) project. The STEM Beyond School project seeks to improve underserved youth’s access to and...
In the United States, children from underserved racial/ethnic backgrounds encounter greater environmental risk both in terms of the physical environment (e.g., housing quality, access to resources like health services and jobs, and exposure to environmental toxins) and the social environment (e.g., social support, neighborhood crime, racism, and discrimination), due to...
The main research goal for this study was to describe how investment into the Hubs has influenced local STEM communities; that is, how STEM Hubs have begun to create opportunities for partnerships, collaboration, connected programing, improved program development or delivery, or improved communication within and outside the STEM teaching and...
The main research goal for this study was to describe how investment into the Hubs has influenced local STEM communities; that is, how STEM Hubs have begun to create opportunities for partnerships, collaboration, connected programing, improved program development or delivery, or improved communication within and outside the STEM teaching and...
This report serves the formative evaluation of ARC-Learn. The goal of this document is to support the use of evidence to inform programmatic changes and improvements for year two of the program, during which time Cohort One will complete its second year and Cohort Two will complete its first year...
About one third of Americans have metabolic syndrome, which is characterized by five risk factors related to blood pressure and triglyceride levels and could lead to diabetes and heart disease if left untreated. Watermelon has been shown to exhibit cardioprotective effects due to its high phytochemical content and may act...
The case study, Implications of Energy Density on Weight Loss, examined the relationship between the consumption of energy dense foods such as whole fruits, whole vegetables and fiber with weight loss. The case study examined four participants from the LITEN Up study, which focused on the effects of a diet...
Contemporary spiritual tourism impacts many stakeholders including environmental ecosystems, tourists, tourist operators, and community members. Increasingly, in the era of the Anthropocene, there is a need for ethical guidance to inform spiritual tourism so as to mitigate social injustice and environmental degradation. This research project investigates the potential for the...
Published October 1960. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published October 1960. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Influenza A and Respiratory Syncytial Virus (RSV) are both enveloped, negative strand
RNA viruses which infect the respiratory mucosa of animals and humans. Despite
decades of research and development of antivirals and vaccines, both of these viruses
continue to be a major health concern throughout the world. The focus of...
Tibetan Buddhism has offered two distinct, seemingly dichotomous perspectives about motherhood as it relates to traversing the spiritual path. In the first, mothering is the antithesis to spiritual development and realization, as it tethers a practitioner to the mundane duties of saṃsāra, the cycle of rebirth and suffering, propelling her...
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Stuart R. Sarbacker
Tibetan Buddhism has offered two distinct, seemingly dichotomous
This study Is a rhetorical analysis of ten documents of Joseph
Smith, Jr's. early revelations spanning the period of 1829 to 1831
to determine the extent to which he used demagogic rhetoric in pursuit
of his goals. A definition of demagoguery is provided and is
applied in an analysis of...
This thesis analyzes contributing factors to Zoom Fatigue and the issues surrounding “attentional dissonance,” or a feeling of tension or rupture between actual and virtual self-perception. The research examines current literature on Zoom Fatigue, and uses the sociological theory of Dramaturgical Analysis, developed by Erving Goffman, to further assess the...
The primary objective of this study was to develop methods for
the selection of temperature sensitive division (TSD) mutants of
Chlamydomonas reinhardtii. Such methods were developed and four
temperature sensitive (TS) mutants were isolated and partially
characterized.
Wild type (WT) cells of the plus mating type were synchronized
by a...
The indiscriminate release of fecal bacteria to the environment
can present a public health hazard when pathogenic species gain access
to drinking and recreational water sources. The extent of bacterial
contamination of surface and ground waters associated with animal
production units and waste application areas seems largely dependent
on the...
The effect of ultra-high pressure on the thermal emf of a
chromelialumel thermocouple is investigated using an indirect
method which does not require a direct knowledge of the temperature
of the pressurized junction. The unknown temperature is written
parametrically as a function of a directly measured quantity, the
electrical power...
The purpose of this paper is to evaluate the extent to which ecological
principles were used in four documents of differing scope and intent, that address
management of forest resources and riparian zones in three National Forests of the
Pacific Northwest. We use the phrase "ecological principles" in a very...
A model was developed for analysis of the soil water balance of
individual reforestation sites in western Oregon. The numerical
procedure for this model was programmed in compiled BASIC language and
calculations for an entire season are made in about 180 seconds on an
IBM AT microcomputer.
The processes that...
The literature relating to fascioliasis in experimental hosts,
and the clawed jird (Meriones unguiculatus) as an experimental host
was reviewed.
Four experiments were conducted using experimental hosts for
Fasciola hepatica. The first two experiments were done using Swiss
mice, B. P. laboratory albino strain; the third and fourth experiments
involved...
Oomycetes are an important group of organisms with a variety of ecological roles similar to fungi. Although many are well-studied plant pathogens known for their devastating effects on agricultural systems, most are little-studied saprobes and parasites of plants and animals in nearly every ecosystem on earth. The advent of affordable...
Genetic counseling, a healthcare profession centered on communicating genetic information to patients and helping them understand it, has been rapidly evolving with the development of genetic sequencing and editing technology over the past decades. Consequently, future and current genetic counselors must address societal and ethical implications, as well as historical...
Christian communities vary widely in their degrees of acceptability or apprehensiveness toward newly developing technologies, ultimately aiming to help individuals optimally grow in their relationships to God and with others. Technologies viewed as conducive to accomplishing these goals are more likely to be accepted by Christian communities. Technologies viewed as...
Children with developmental disabilities (DD), particularly autism spectrum disorder (ASD), may use complementary health approaches (CHA), including some modalities that can be unsafe, inefficacious, and/or costly. Still, the prevalence of CHA use among US children with DD is not known and their reasons for use are not well understood. By...
Few remote health monitoring (RHM) studies have included Mexican-origin Latinos, and even fewer have explored RHM acceptance and utility, reasons for RHM uptake success or failure, or how cultural values influence RHM use among this population. The primary purpose of this study was to determine the remote health monitoring (RHM)...
Previous research on academic success in biology has focused on the influence of prerequisite knowledge and cognitive ability as measured by course grades or GPA. More recently, the field has considered the influence of non-cognitive factors such as grit, defined as passion and perseverance for long term goals. Both grit...
The goals of this work are to a) understand community perspectives related to public engagement with science and the Luquillo Long Term Ecological Research (LUQ-LTER) program, b) enhance existing relationships within these communities, and c) illuminate opportunities for establishing new relationships between the LUQ-LTER program and its surrounding community. We...
The Center for Research on Lifelong STEM Learning was invited by the Oregon State University Extension Service 4-H Youth Development and the Portland Metro STEM Partnership to evaluate Year 1 of the STEM Beyond School (SBS) project. The STEM Beyond School project seeks to improve underserved youth’s access to and...
This study examines how three measures of child health: overall health status, access to health insurance and dental checkup status, predict the likelihood of a child experiencing higher number of absences in children eligible to attend Head Start, and how that association is influenced by the presence of a depressed...
Ferlins are a family of calcium-sensitive proteins involved in fusion and fission membrane trafficking events. There are six ferlin members: dysferlin, otoferlin, myoferlin, Fer1L4, Fer1L5, and Fer1L6. Previous research shows the first three ferlins play a pathophysiological role in humans, while the other three remain uncharacterized. Fer1L6 is one of...
The ¹⁴CO₂ composition of plant and soil respiration can be used to determine the residence time of photosynthetically fixed carbon before it is released back to the atmosphere. To estimate the residence time of actively cycled carbon in a temperate forest, we employed two approaches for estimating the Δ¹⁴CO₂ of...
Full Text:
Observations of 14CO2 in ecosystem respiration from a
The ¹⁴CO₂ composition of plant and soil respiration can be used to determine the residence time of photosynthetically fixed carbon before it is released back to the atmosphere. To estimate the residence time of actively cycled carbon in a temperate forest, we employed two approaches for estimating the Δ¹⁴CO₂ of...
Full Text:
ecosystem respiration from a temperate deciduous forest in
Northern Wisconsin
Claire L. Phillips1, Karis
The Educational Policy Improvement Center (EPIC) and the Center for Research on Lifelong STEM Learning at Oregon State University (OSU) are collaborating on a yearlong capacity-building research project in order to better understand the common and unique features and strengths of Oregon’s STEM Hubs. The project is intended to examine...
This qualitative study explored the gendered professional experiences of male elementary school counselors. The participants or co-researchers were twelve men of varied ethnic and racial backgrounds between 25 and 60 years old. They lived and worked in five US states in urban, suburban and rural settings. They provided school counseling...
The isotopic compositions of interstitial waters collected from Hydrate
Ridge during Ocean Drilling Program Leg 204 were measured to
evaluate the fluid evolution of this accretionary prism. At shallow
depths, the dissolved Cl- concentrations and δD and δ¹⁸O values of the
interstitial water reflect changes in the salinity and the...