Using qualitative methodology and a case study format, this study examines from the inside-out the organizational impact of significant change in leadership at a mature community college during the initial period of that change. The study describes and characterizes the nature of change in the organization during the periods of...
In competitive swimming a spread in time of only 0.10,
and 0.16 seconds constituted the difference between
finishing second and seventh, and first and eighth,
respectively, in the women's 50 yard freestyle at the 1993
NCAA Division III National Swimming & Diving Championships.
Based on data collected over a period...
The purpose of this annotated bibliography is to guide middle school and high school students into critical thinking about environmental issues. Through keen observation of their bioregion and through an integration of interdisciplinary literature which focuses on Oregon writers, students will be challenged to think, write, and discuss current issues...
In twentieth century America, women continue the age-old struggle for recognition
as whole, intelligent individuals, not just an "other," less hearty, less deserving
or less capable being than man. Sarah Grimke spoke of the inequalities over 150 years
ago during the abolitionist movement when she compiled her major arguments into...
Community colleges are experiencing a decline in state allocated funding. Traditionally, college administrators look for ways to cut expenditures and raise tuition and fees to make up for the shortfall. Using available land resources to generate a revenue stream may provide revenue for community colleges.
The purpose of this study...
John Keats, as a principal figure in the Romantic
movement in Europe, reacted against the philosophy of the
Enlightenment. His poetry and letters are testament to his
distrust of, and resistance to, an ever increasingly
clinical and "reasonable" society. Keats's poetic thought--imaginative,
speculative, dialectic--is the antithesis of an
Enlightenment philosophy...
Very little empirical research has been conducted on
Asian Americans as a whole in relation to their consumer
behavior, specifically their clothing behavior. A review of
literature demonstrated that Asian Americans have been
studied from different psychographic and sociological
aspects. However, the apparel shopping behavior of this
market has received...
The classroom practices discussed in this thesis come slowly and at a "slant" to feminism through critical reading of texts, a practice that I call a (re)presentation of the silent women in texts. Given our patriarchal western culture, making meaning, and especially making sense, of the role and representations of...
A controversy regarding literacy lies at the heart of debates over the
current state of American education. In response to the debate, this study
reviews and analyzes the literacy theories of E.D. Hirsch, Jr., Walter Ong,
Sylvia Scribner and Michael Cole, Shirley Brice Heath, and Paulo Freire. The
author presents...
Presenting and synthesizing several paradigms for the teaching of literature in American colleges, I investigate how definitions of reading, readers, texts, interpretations, and knowledge affect student acts of reading and writing. In addition, I draw upon specific examples of text-based, reader-based, and social-cultural based models for the teaching of reading...
Populations of organisms are influenced by both top-down (predator driven) and bottom-up (environment or resource driven) effects. Seabird research has largely focused on bottom-up factors influencing reproduction, with little emphasis on top-down. Our goal was to better understand top-down impacts on colonial nesting seabirds over a range of spatio-temporal scales....
This interpretive study sought to understand how six GED graduates who
dropped out of high school came to be enrolled at a rural community college,
and what factors they perceived promoted or impeded their academic
persistence and success. Specifically the study focused on student
backgrounds, reasons for dropping out of...
Giant reed (Arundo donax L.) is a candidate to provide feedstock for the Portland General Electric power plant in Boardman, Oregon. Giant reed is a fast perennial grass, producing 23-27 metric tons ha⁻¹ of biomass and has the ability to adapt to diverse environments making it a good candidate for...
The present study examined the influence of the
demographic variables of age, gender, major in college, and
level of education or class standing on individuals' stage
of moral development. Trevino's interactionist model,
combined with the basic principles of cognitive moral
development, provided the theoretical basis for this study.
One-hundred and...
The purpose of the present study was to test the selfconcept
and store image congruency theory with an elderly
population. The self-concept and store image congruency
theory predicts that individuals patronize stores that they
perceive as having an image similar to their own self-concept
(Martineau, 1958). The present study specifically...
Little empirical research has been conducted on self-gifts
as a phenomenon of consumer behavior. A review of
literature demonstrated that the phenomenon of self-gifts has
been studied from the conceptual aspect, such as self-gift
functions. Yet, our knowledge of self-gifts still remains
limited because many of the determinants of self-gifts...
The end of the Cold War brought about changes within international political relations that resulted in expanded interest in global civil society. Such developments, like globalization and democratization, have encouraged the growth of social and political organizations. Political scientists have found that these inter-governmental and non-governmental organizations have a significant...
Two specific goals were addressed for this dissertation. First to investigate and identify the mechanistic profile of ketoconazole (KT)-induced hepatotoxicity by utilizing in vivo and in vitro approaches determining the mechanism of action for the hepatotoxicity incurred. To date, there has not been a mechanistic determination of the hepatotoxicity associated...
Rubus seed characteristics; seed coat morphology, anatomy, germination requirements and dormancy were studied in order to define protocols for breaking seed dormancy. Morphological analysis of the seed coat (testa) using scanning electron microscopy (SEM) included 56 seed accessions of 10 subgenera preserved in the collections of the US Department of...
Through examination of empirical evidence on individuals with Asperger’s Syndrome and related Pervasive Developmental Disorders, the author attempts to provide an overview of the social deficiencies associated with these disorders. Points of primary concern are the social deficiencies in developing competence in experience-sharing and demonstrating empathy, especially in how they...
Three types of experiments were designed to further characterize
the tryptophan decarboxylating enzyme of Reed and Crecelius
(1967).
1) Light inhibition studies were made with etiolated pea seedlings
to determine the in vitro response of the tryptophan decarboxylating
enzyme. Assays of indoleacetic acid oxidase (IAA oxidase)
and guaiacol-active pea seedling...
The rate of the C¹⁴0₂ release from glucose, specifically labeled
with C¹⁴ at 1, 2, 3+4, and positions, was used to study the relative
participation of pathways of glucose catabolism in red beet slices.
Evidence was obtained which indicated that in mature red beets glucose
was catabolized mainly via glycolysis-tricarboxylic...
Several aspects of the potent inhibition of bovine plasma amine
oxidase (PAO) by hydrazines were investigated by kinetic and preparative
means. The inhibition was classified as pseudo-irreversible
by the method of Ackerman and Potter (Proc. Soc. Exptl. Biol. Med.
72, 1 (1949), and was found to exhibit Zone B kinetic...
Recent studies have demonstrated that perturbations of
intracellular thiol and calcium homeostasis may be important events
in the early development of cell injury by toxic chemicals.
Incubation of isolated rat hepatocytes in a calcium free
medium, severely depleted intracellular Ca²⁺ levels and resulted in
the loss of both cytosolic and...
Three highly purified forms of cytochrome P-450 (P-450a, P-450b, P-450c) from Aroclor 1254-induced rat hepatic microsomes catalyzed the monooxygenation of 1-(2- chloroethyl)-3-(trans-4-methylcyclohexyl)-1-nitrosourea (MeCCNU) and 1-(2-chloroethyl)-3-(cyclohexyl)-1-nitrosourea (CCNU) in the presence of purified NADPH cytochrome P-450 reductase, NADPH and oxygen. Cytochrome P -450- dependent monooxygenation of CCNU gave six alicyclic hydroxylation products...
Certain 2- chioroethyl nitrosoureas have been demonstrated
to be highly specific inactivators of chymotrypsin
in vitro and glutathione reductase, both in vivo and in
isolated rat hepatocytes. The inactivation of glutathione
reductase in isolated hepatocytes resulted in an increased
sensitivity toward an adriamycin induced oxidative
challenge.
Prolonged incubation of 1-(2-chloroethyl)-3-([1-¹⁴...
An aspect of the metabolism of monoalkylhydrazines has been
investigated using both intact rats and rat liver microsomal enzyme
preparations.
Intact rats respired propane and n-butane on administration of 0.3-0.5 mmoles of isopropyl- and n-butylhydrazine, respectively.
Based upon dose administered, a five to ten percent
yield of hydrocarbon was obtained....
Glutathione, a ubiquitous intracellular tripeptide, protects cells by reacting with electrophiles and radicals that can damage cellular macromolecules. However, glutathione conjugation is now recognized as one mechanism by which drugs and xenobiotics can also be converted to reactive intermediates having toxic consequences to cells. The halogenated alkane 1,2-dichloroethane forms S-(2-chloroethyl)...
Protein disulfide isomerase (PDI), a member of the thioredoxin superfamily, contains two domains with significant sequence homology to the active sites in thioredoxin. PDI facilitates the folding of nascent proteins in the endoplasmic reticulum (ER), binds hormones and Ca²⁺, catalyzes the glutathione dependent reduction of dehydroascorbate, serves as a major...
Some kinetics of the oxygen requirement of amine oxidases
have been investigated using bovine plasma monoamine oxidase (PAO)
and pea seedling diamine oxidase (DAO). A system is described for
studying enzyme reactions under controlled oxygen tension and in an
O₂-free N₂ atmosphere.
O₂ Km values were determined at two different...
Lipid peroxidation is believed to be an important
process in the development of cellular injury. In
addition to the degradation of biological membranes,
increasing evidence indicates that lipid peroxidation can
alter the structure and function of DMA.
The present study examines the peroxidation of
nuclear membranes and the capacity of...
Partial purification of diamine oxidase from pea seedlings,
Pisum sativum, was accomplished by homogenization of 8-10 day
etiolated epicotyl tissue, followed by ammonium sulfate fractionation
and DEAE Sephadex column chromatography. The preparation thus
obtained was purified 50 fold.
Some properties of this enzyme were investigated. A radio-tracer method was adapted...
The presence in rat liver microsomes of an enzyme system
which demethylates N-methylhydrazines and azo compounds to formaldehyde
has been reported. Some of the compounds found to be
substrates were monomethylhydrazine, N-isopropyl-α-(2-methylhydrazino)-
p-toluamide and the azo derivative of the latter hydrazine. This
enzyme can be classified as a mixed function...
In order to determine the total number of cytochrome P-450 isozymes
present in a given species following various treatments, mature
male rats (Sprague-Dawley) were injected intraperitoneally with the
classic mixed-function oxidase inducers phenobarbital (PB), pregnenolone-
16a-carbonitrile (PCN), 3-methylcholanthrene (3-MC), or the appropriate
control vehicle.
Hepatic microsomes were solubilized and P-450...
Seedling root fluorescence (SRF) has been used as a test in the USA since 1941 to discriminate Italian ryegrass (Lolium multiflorum Lam.) from perennial ryegrass (L. perenne L.). Generally, roots of Italian ryegrass fluorescece when exposed to ultraviolet light, while roots of perennial ryegrass do not. Presence of fluorescent seedlings...
The objective of this study was to determine the internal consistency
rating for the Film Test for Understanding Behavior (FUB)
and the three subscales within the test. An estimation formula which
contrasts sums of squares generated from an analysis of variance
was used to compute the internal consistency reliability coefficients...
In an attempt to study the times in the lifecycle of
Bdellovibrio bacteriovorus at which various genes are
transcribed, the patterns of messenger ribonucleic acid
(mRNA) and ribosomal ribonucleic acid (rRNA) syntheses
were examined using two different types of hybridization
systems. The hybridization system using membrane bound
deoxyribonucleic acid (DNA)...
Although the public schools have spent billions of dollars on computer
technology, only a few teachers are integrating them into their teaching. The
purpose of this study was to determine barriers to the integration of computers into
teaching and potential teaching strategies to encourage integration. Teachers (N=122) from 14 elementary...
The purpose of the present study was to investigate the moderating role of hedonic shopping value in shopping experience satisfaction in the context of clothing shopping. Hedonic shopping value is an emotional and hedonic appreciation of shopping. According to the existing literature, consumers' hedonic shopping value is associated with several...
Competition for soil water resources between newly planted Douglas-fir seedlings and aggressive early-seral plants, such as Senecio sylvaticus [L.] (Woodland groundsel, Senecio), can create drought conditions that impact tree seedling physiology, growth and likelihood of mortality. However, the specific impact of Senecio on soil moisture dynamics and inducement of water...
A series of studies was performed to more clearly evaluate gonadal function in llamas. Luteinizing hormone (LH) and progesterone (P₄) concentrations were compared following natural or hormone-induced ovulation. Luteal regression was evaluated following administration of the prostaglandin F₂α analog cloprostenol. The interaction of age, season and castration on testosterone (T)...
Red raspberry, Rubus idaeus L., is a valuable crop for the U.S. Pacific Northwest and clonal propagation is required to produce disease-free plants and for germplasm preservation. One challenge of red raspberry micropropagation is the wide variation in growth response among the cultivars. The studies described in this dissertation were...
The West Eugene Wetlands, Eugene, Oregon, which provide habitat for number of endemic and endangered plant species, are currently threatened by a Reed canarygrass (Phalaris arundinacea L.) invasion. This study addresses the hypothesis that Phalaris spread can be explained in part by using watershed-scale landuse patterns as surrogates of the...
Through a joint effort by the Swiss Federal
Institute for Reactor Research and Oregon State
University, the fuels modeling code SPECKLE is being
developed to model sphere-pac mixed carbide nuclear fuel.
Major parameters, such as fission gas release, fuel
restructuring phenomena, and the temperature and porosity
distributions in the fuel...
Globally intermittent turbulence is characterized by sudden switching from significant turbulence to weak turbulence and back on time scales ranging from seconds to tens of minutes as opposed to microscale intermittency, which is due to organization of small scale gradients by individual eddies on scales as small as the Kolmogorov...
Asthma prevalence in children under age 18 has risen steadily in the U.S. since the mid-1970s. Most researchers attribute this increase to air pollutants, socioeconomic status or urban residence. This study examined asthma prevalence in Lane County, Oregon, using children's asthma hospital discharges (1990-1995), and data from 10 of 16...
The Roosevelt elk (Cervus elephus roosevelti) is a
National Forest management indicator species on the westside
of the Cascade mountains, Western Oregon. A Habitat
Effectiveness model is used by State and Federal agencies to
evaluate elk habitat in the region. Concerns about the
model's lack of differentiation between winter and...
The effect of lifting date and root-pruning treatments on
water potential, root regeneration, and shoot growth of six-month-old
and three-year-old Douglas-fir seedlings bare-root transplanted
into a growth chamber, and sawdust bed, respectively, was studied.
Root growth in six-month-old and three-year-old seedlings was
highest in February and August respectively. Survival was...
The northern Los Angeles basin is influenced by two structural styles: the west-trending compressional Transverse Ranges to the north, and the strike-slip Peninsular Ranges to the south. The interaction of these two structural styles has resulted in a complex fold fault belt at the northern margin of the Los Angeles...
Full Text:
northern Los Angeles Basin, California
AN ABSTRACT OF THE THESIS OF
Cheryl Hummon for the degree of
Researchers have investigated the behavioral and demographic characteristics of fashion innovators, opinion leaders, and innovative communicators in samples drawn from
populations residing outside of Oregon. Therefore, the
purpose of the present study was to examine differences
between innovative communicators and non-innovative
communicators in a sample of Oregon women in their...
The goal of the study was to collect data on the ecology and
reproduction of Sophora leachiana in order to help explain the rarity
and restricted range of this species. There are 13 known populations
of S. leachiana, occurring in a 29 by 6.4 km area in the Siskiyou
Mountains...
Marine Protected Areas (MPAs) can be considered as one of powerful conservation tools of fishery resource management in the literature. However, due to continuing environmental awareness and mismanagement, the Philippine government has decentralized the power of legislation and management of its MPAs since the early 2000. This encouraged participation of...
Interviewing eighteen older parents (aged 65 and older) with two or more children for this project established support for the emotional experience of intergenerational ambivalence. Seventy-five parent-child relationships were discussed. Two major themes arose over what healthy, independently living parents feel ambivalent about in their relationships with their midlife children....
Biodiversity has become an important focus of ecological and wildlife research.
However, the social aspects of biodiversity policy and regulations, specifically the public's
perspectives and values about biodiversity, have not been adequately considered. This study
examines the range of opinion about biodiversity of six groups that are potentially affected by...
Forest stands were studied to determine if old-growth
forest structure could be mimicked in younger stands via
overstory manipulation. Cover and species composition of
understory plants were systematically sampled in sixteen
thinned second-growth stands and sixteen adjacent unthinned
second-growth Douglas fir (Pseudotsuga menziesii (Mirabel)
Franco.) stands. The stands were thinned...
Stevia (Stevia rebaudiana) is a perennial herbaceous plant native to Paraguay and used traditionally by the native Guarani peoples for centuries to sweeten medicinal teas. Stevia has only been commercially cultivated over the past 50 years and cultural practice information suitable for implementation by growers is limited. Currently stevia’s commercial...
Bacterial contamination is one of the most important problems
both in plant tissue culture research and commercial laboratories. Early
detection of contaminants saves time, effort, and money. Strawberry
runner explants were screened for contaminants during June to August,
1994 and 1995. Most contaminants found were bacterial rather than
fungal. Bacterial...
Depression has been one of the most prevalent psychological disorders. Its relationship with life events is reviewed in light of factors influencing the relationship such as self-esteem, attributional styles, and cognitive complexity. The mechanism of depression and its links with personality disorders are looked at in relation to anxiety. The...
Improved recovery of cryopreserved meristems and calli from in
vitro currant (Ribes aureum Pursh and R. ciliatum Humb. & Bonpl.) plants
was obtained by two-hour pretreatment with sucrose, proline, abscisic
acid-responsive protein (RABP), and bovine serum albumin (BSA)
solutions. Meristems and calli cold-acclimatized for one week were
immersed in pretreatment...
In-vitro plants in slow-growth storage must be routinely evaluated for repropagation
and assessment of viability. It is often difficult to determine plant health by visual
assessment due to variation in growth patterns and plant structure among genera. In
order to evaluate cold-stored germplasm, laboratories need more effective approaches for
viability...
Roots of greenhouse-grown peppermint (Mentha piperita L.) and spearmint (Mentha spicata L.)
plants and in vitro-grown shoot cultures were inoculated with Verticillium dahliae conidial suspensions to
study symptom development, detection, and elimination of the V. dahliae. There were significant
differences in the symptom expression of control and infected shoot cultures...
Genetic stability of micropropagated and cold-stored Fragaria x anannasa cultivar
'Pocahontas' was evaluated by Random Amplified Polymorphic DNA (RAPD) assay.
Plantlets grown for eight months on M & S medium with 5 μM and 15 μM N6-
benzyladenine (BA) were analyzed. No evidence of mutations was seen in over 200...
Two studies used DNA markers to assess their usefulness in germplasm identification and evaluation of genetic stability in four cryopreserved Rubus accessions that were stored for over 10 years in liquid nitrogen. In the first study, 12 robust Simple Sequence Repeat (SSR) markers were developed from two microsatellite-enriched libraries of...
Alternating temperature (22°C / -1°C) pretreatments were effective for
increasing cold hardiness and recovery of cryopreserved meristems. Combining low
temperature pretreatment with abscisic acid (ABA) or sucrose treatments reduced the
time required for optimal cold hardiness of meristems. Desiccation tolerance was
directly correlated with increased cold hardiness and recovery of...
The availability of new pear rootstocks could be increased by development of an efficient micropropagation system. Many P. calleryana, P. betulifolia and P. communis rootstocks are resistant to many pear diseases and are graft compatible with leading cultivars. Explains of three potentially useful rootstock selections P. calleryana Decne 'OPR 157',...
Corylus avellana L. is a global commodity and a valuable crop for the U.S. Pacific Northwest. A tremendous amount of work has been put into the development of healthy disease free, high yielding and tasty hazelnuts for the in-shell and confectionary markets. Clonal propagation is required to provide nursery trees...
:_____________________________________________________________________
Barbara M. Reed
Corylus avellana L. is a global commodity and a valuable crop for the U.S
Forest carnivores such as the fisher have frequently been the target of conservation concern due to their association with older forests and assumed sensitivity to landscape-level habitat alteration. Although the fisher has been extirpated from most of its former range in the western U.S., it is still found throughout much...
A micropropagation system was developed for hazelnut cultivars and
rootstocks. Culture establishment was affected by explant source, explant collecting
season, and type of explant. The highest frequency of culture initiation and lowest
tissue oxidation and contamination were obtained from internodes with single axillary
buds from grafted greenhouse-grown plants early in...
Hazelnut is one of the most important nuts in worldwide production and the European hazelnut (Corylus avellana L.) is the most economically important of the 11 recognized hazelnut species. Development of new cultivars is continuous, with emphasis on better nut quality, high yield and disease resistance. Hazelnuts are highly heterozygous,...
Most reserves fail to capture the habitat heterogeneity necessary to maintain viable populations of wide-ranging species. Methods to determine defensible dimensions of reserves and reserve networks are needed. The primary goal of this study was to develop such methods for lowland tropical forests by examining habitat- and spatial-use patterns of...
Oxidative stress that occurs during cryopreservation may be reduced by the addition of antioxidants. Vitamin E (Vit E), Vitamin C (Vit C), glutathione (GSH), lipoic acid (LA), glycine betaine (GB) and polyvinylpyrrolidone (PVP) were applied at four steps of the PVS2 vitrification protocol (pretreatment, loading, rinsing, and regrowth). Shoot tips...
Relatively little is known about wintering bird communities in lowlands of the Pacific Northwest, yet, the condition of winter habitats potentially can pose a major constraint on bird populations. I initiated a study to determine: (1) Which avian species use lowland riparian and wetland habitats in the Willamette Valley during...
Interest is expanding for the potential role of estuaries, particularly seagrass and salt marsh habitats, to sequester carbon, mitigate ocean acidification, and support abundant fisheries. The important functions of estuaries are part of a broader set of ecosystem services, or benefits to humans, which are regulated by ocean and watershed...
Communication cannot be successful without the
cooperative listening response of an auditor. Auditors must
feel empowered to act as agents of change or their decisions
and actions cannot be influenced by the discourse. Their
every response depends upon their ability to perceive
themselves as potential mediators of change.
A review...
One answer to the problem of missing observations in two-way
classification experiments is to insert estimates of missing observations
into deficient cells. Once missing observations have been estimated,
the experimenter may proceed with his analysis using the
familiar normal equations which apply to complete data. This paper
discusses generally the...
Cyprinid herpesvirus 3 (CyHV-3), commonly known as koi herpesvirus (KHV), is a member of the Alloherpesviridae and is a deadly pathogen for koi and common carp, Cyprinus carpio. It causes severe gill necrosis and nephritis, dermal ulceration and hemorrhage, and mass mortality of up to 100% of affected fish. Fish...
Increased sales of surimi seafood, with the majority as crabstick in the United States indicates that surimi based products are becoming more popular. With growing popularity, there is increased competition for market share. Under these circumstances, some companies may be willing to sacrifice product quality in order to facilitate manufacture...
Generalization is a fundamental mathematical practice across all disciplines and content areas (Amit & Klass, 2005; Lannin, 2005; Pierce, 1902; Vygotsky, 1986; Ellis, Lockwood, Tillema & Moore, 2017). While a considerable amount of research has been conducted on students' generalizing activity in algebraic contexts (Amit & Klass 2005; Becker &...
Clay mineral genesis was studied in soils representative of several
different geomorphic surfaces in western Oregon, ranging in age from
Pliocene-early Pleistocene to late Pleistocene. Soil solution studies,
clay mineralogy, and soil raicromorphology were employed to provide
evidence of clay mineral synthesis and interpret soil genesis.
Soils at each study...
Suspensory apparatus breakdown and hyperextension of the metacarpophalangeal and metatarsophalangeal (fetlock) joints is a common condition in the llama and has been observed in llamas of all ages. Llama breeders refer to the condition as "down in the pasterns" or "down in the fetlocks." The condition can result in debilitating...
The importance of active-entry drift at a community-scale
was evaluated by testing whether the placement of wood
in streams affected the abundance of Baetis spp. mayflies in
drift. Baetis were chosen because they use drift as a
behavioral strategy and are important in salmonid diets. The
density of woody debris...
The objective of this study was to ascertain the magnitude and
distribution of rainfall over coastal waters of the northwestern United
States and to compare values with those at nearby land stations.
Precipitation was measured with gauges at Totem, rainfall amounts
were assessed from weather reports at lightships off the...