Differential investment in offspring has been reported for many mammals, often in the context of the Trivers–
Willard model of male-biased investment, but evidence of differential investment in pronghorns (Antilocapra
americana) is largely lacking. We assessed the causes and consequences of different birth masses of littermate
fawns in a pronghorn...
Pantoea vagans C9-1 (C9-1) is a biological control agent sprayed onto apple and pear trees during bloom for suppression of fire blight, a devastating bacterial disease caused by Erwinia amylovora. Prior bioinformatics studies of C9-1 focused on predicted phenotypes associated with the three native megaplasmids, pPag1, pPag2, and pPag3, and...
The purpose of this study was to determine if adding a specialized
instructional section on death and dying to ongoing curriculum
would affect attitudes of student nurses toward death and dying.
Subjects were 30 first-year nursing students enrolled in the Associate
Degree Nursing Program at Linn-Benton Community College, Albany,
Oregon....
The purpose of this two phased study was to determine the challenges to
implementing food safety and hazard analysis and critical control point
(HACCP) in school foodservice and the adherence to food safety
procedures in 15 schools. In phase one, food safety and HACCP
procedures were studied utilizing a focus...
Fisheries managers often use models of population density to evaluate the status of stream-living fishes, but many of these models have low predictive performance for abundance and density. These models could incorporate several factors that can limit population density, particularly the effect of body size, envisioned by the theory of...
The anthropogenic introduction of nutrients to water bodies has been shown to alter the structure and function of natural aquatic ecosystems, yet national EPA lake and reservoir nutrient criteria remain too broad for effective regional water quality management. This study uses a reference site approach to propose numeric nutrient criteria...
Individual quota (IQ) management systems in commercial marine fisheries are highly diverse, differing in the security, durability and exclusivity of the harvesting privilege and the transferability of quota units. This diversity in the degree of harvest rights may influence the effectiveness of IQ fisheries to meet management objectives. We conducted...
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,†, Olaf P Jensen3,†,
Jason S Link4,†, Steven J D Martell5,†, Ana M Parma6,† & Anthony D M Smith7
Data in the form of counts or proportions often exhibit more
variability than that predicted by a Poisson or binomial
distribution. Many different models have been proposed to account
for extra-Poisson or extra-binomial variation. A simple model
includes a single heterogeneity factor (dispersion parameter) in the
variance. Other models that...
Sage grouse are a species of concern because their abundance, distribution, and productivity have declined during the past century. Sage grouse productivity has been linked to specific habitat components including particular forbs and native bunchgrasses. Studies on the effects of fire were conducted in Southeastern Oregon in mountain big sagebrush...
Falls are a common problem among older adults, including those who are relatively healthy and living independently. Exercise has been recommended as an intervention to reduce falls by slowing and/or reversing age-related declines in balance, strength, and mobility. However, it remains unclear which types or combinations of programs are most...
Mental health services are vital during this time where mental health issues in college students have been increasing in prevalence and in severity around the world. However, mental health care is not always accessible to all. This project explores the needs of students at Oregon State University who identify as...
The objective of this study was to evaluate the influence of cow age on grazing distribution relative to mountain riparian areas. In each of two years, sixty cow-calf pairs were stratified by age into the following treatments: 1) thirty first calf heifers (442 kg, body condition score (BCS)=4.5), and 2)...
The overarching premise of this dissertation is to understand how different college and university physical activity education policies affect college and university students. Fundamentally, some American colleges and universities require their students to complete a physical activity education requirement whereas others do not. Given the different policy arrangements of college...
This dataset was created for the purpose of collecting and cataloguing sources that mentioned aspects of cultural diversity or workforce diversity within natural resource professions. The exploratory questions that prompted the collection of sources in this dataset were:
- Is diversity discussed in scholarly sources within natural resources?
- If...
Academic library faculty require a supportive atmosphere in order to successfully engage in research and publication. At Oregon State University, the Library Faculty Association (LFA) provides avenues for peer criticism of manuscripts and presentations and for the discussion of professional issues. A survey of LFA members on their level of...
Ecological resources available to freshwater fish shift spatially, temporally and across life stages. To better understand how spatial-temporal availability of resources influence fish, I examined the phenologies of hatching and emergence of Coho Salmon (Oncorhynchus kisutch) in streams with contrasting and strongly defined seasonal thermal variability. The study streams included...
My investigations of the natural products of marine algae have resulted in
the discovery of several new secondary metabolites. Bioassay-guided
fractionation led to the isolation of these new compounds and spectroscopic
analysis was utilized in their structural characterization.
Two new and potent antimitotic metabolites, curacins B and C, were
isolated...
Natural products (secondary metabolites) are small organic molecules derived
from plants, microbes, and marine organisms that have served as a diverse source of
useful compounds pharmaceuticals. New biologically active natural products are critical
as anti-infective and cancer drug leads. Cyanobacteria, or blue-green algae, produce
diverse cytotoxic metabolites that represent potential...
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OF ABBREVIATIONS
Full Term Abbreviation
Oregon State University OSU
Methanol MeOH or M
Ethyl
Published February 1986. 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
This paper examines the influence of species, method, and area on automated
species-area curve created from a systematically sampled data set. Because this is a new
approach to species-area curves, three tests were run to evaluate the performance of the
data sets and accumulation technique. The tests involved 1) range...
The chemical stability of folic acid in 25 percent dextrose,
3.5 percent amino acids and multivitamin solution was investigated.
Solutions of 2.5, 5.0, 7.5 and 1.0 mg/liter of folic acid admixed
in the study solution were prepared. Solutions were stored
in light-room temperature, light-refrigeration, dark-room temperature,
or dark-refrigeration. Samples were...
Marine algae have been recognized as a rich resource of new
and unusual organic molecules with diverse biological properties.
The current need to develop new antifungal, anticancer, antibiotic
and antiviral drugs has led to an intense research effort into the
discovery, isolation and structure determination of potential
medicinal agents from...
Published March 1974. 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
Riparian forests provide a myriad of ecosystem functions for adjacent streams and rivers, and due to these linkages, changes in riparian forest conditions can have direct implications for stream ecosystems. Resource managers in the coast redwood forests (Sequoia sempervirens) of northern California (USA) are actively thinning second-growth stands to accelerate...
Hereditary variation is a vital component in the development of new and improved cultivars of landscape plants. Sources of hereditary variation include naturally occurring variation, recombination due to controlled crosses, artificial mutagenesis, and genetic modification via biotechnology. Here I explore all methods with the exception of genetic modification via biotechnology....
This dissertation is informally divided into three major sections. In the first section (Chapter 2) I use data from field mapping, isotopic geochronology, whole rock geochemistry and trace element concentrations in zircons to examine the petrology, geochemistry and ages of the Haquira East porphyry copper deposit of southern Peru. In...
Circular dichroism (CD) spectra were obtained for bacteriophage T4 lysozyme and three of its mutants in the presence and absence of colloidal silica nanoparticles. Mutant lysozymes were produced by substitution of the isoleucine at position 3 with tryptophan, cysteine and leucine. Each substitution resulted in an altered structural stability, quantified...
Collective migration in animal groups is often guided by distributed leader agents that influence their peers by modulating their motion behaviors. Distributed leadership is a promising navigation strategy for artificial swarms, but designing the leaders’ controllers is difficult due to the swarm’s collective emergent behaviors. The presented research formulates a...
Native freshwater fish biodiversily is imperiled in Oregon with 36 species
or sub-species listed by the State of Oregon as sensitive, threatened, or endangered, and
9 species or sub-species listed as endangered or threatened under the federal
Endangered Species Act. Understanding and managing biodiversity is critical to its
conservation. Using...
Ms. Miles is Missing—the beginning of a novel—is the story of a woman who, in her early thirties comes to realize that the life she is living is not the life she wants. She yearns for her lost childhood, and tries to come to terms with her mother’s death. Martha...
Institutionalized oppression is a large multifaceted system that is regularly unrecognized and misunderstood. Marilyn Frye’s birdcage analogy of oppression (1983) demonstrates why this complex system is often invisible, yet always immobilizing. In this analogy, Frye relates the various manifestations of oppressions to the wires of a birdcage, demonstrating that it...
This study focused on composition teachers in elementary and
secondary schools who researched their own teaching practices. Specifically, it
examined political implications of their work within the larger context of the
education hierarchy. Central to this examination were teacher-researcher (t-r)
perceptions of and interactions with other members of the education...
Published 1957. 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
This thesis is a comparative study of the two processes of currency change that occurred in Ecuador in 2000 and in France in 2002. Although the background of these two countries and the motivations behind each currency change varied, Ecuador and France have experienced many similar outcomes. Each of the...
When Biosand filters cannot be constructed with crushed quarry rock due to resource limitations, a suitable alternative filter media is needed. In this research, two crushed quarry rock alternatives were examined. Three bench-scale Biosand filters with crushed rock, beach sand, and heat-treated beach sand media were simultaneously dosed with Willamette...
Published September 1995. 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
There are three avenues of education to prepare students for board
examination leading to licensure as a registered nurse: diploma certificate,
associate degree, and baccalaureate degree. The baccalaureate
nursing programs are challenged to prepare students for acute care nursing,
community health nursing and leadership in nursing. Baccalaureate
nursing educators believe...
The purpose of this study was to investigate the need for an
academic transition program at the beginning of the high school
experience for 90 to 100 critical - need ninth grade students at
North Thurston High School in Lacey, Washington. Opinions of ninth
and twelfth grade high school students...
The purpose of this study is to investigate the role of women in the
Japanese workplace. Data obtained from in-depth interviews and
questionnaires, shows that the Japanese workplace is in a state of
change moving toward a higher level of opportunity for female workers.
While similar to the circumstances experienced...
Human beings are condemned to freedom, according to Jean-Paul Sartre's Being and Nothingness. Every individual creates his or her own identity according to choice. Because we choose ourselves, each individual is also completely responsible for his or her actions. This responsibility causes anguish that leads human beings to avoid their...
The dynamic philosophy of education as applied to the undergraduate Civil Engineering program has been influenced by such factors
as the introduction of new theories, the demands
and needs of our society and the personnel responsible for teaching.
These changes
are reflected in the curriculum as witnessed
by a historical...