A wilderness area, as administered by the U. S. Forest Service, is a tract of undeveloped land over 100,000 acres in size with no roads or provision for motorized transportation. Commercial timber cutting, hotels, stores, and similar developments are prohibited. While there are some exceptions for private holdings and administrative...
A wilderness area, as administered by the U. S. Forest Service, is a tract of undeveloped land over 100,000 acres in size with no roads or provision for motorized transportation. Commercial timber cutting, hotels, stores, and similar developments are prohibited. While there are some exceptions for private holdings and administrative...
A wilderness area, as administered by the U. S. Forest Service, is a tract of undeveloped land over 100,000 acres in size with no roads or provision for motorized transportation. Commercial timber cutting, hotels, stores, and similar developments are prohibited. While there are some exceptions for private holdings and administrative...
A wilderness area, as administered by the U. S. Forest Service, is a tract of undeveloped land over 100,000 acres in size with no roads or provision for motorized transportation. Commercial timber cutting, hotels, stores, and similar developments are prohibited. While there are some exceptions for private holdings and administrative...
This book is an environmental primer for the people of the Willamette Valley. It sets forth basic principles showing how men's actions cause future consequences in the environment.
L. C. Dunn (1893-1974) spent most of his scientific career conducting research in
developmental genetics as a member of the Zoology Department at Columbia
University in the City of New York. He had an accomplished scientific career
researching mutations in mice, which earned him respect from other geneticists and
scientists....
The purpose of this study was to understand how instruction in an introductory nonmajor astronomy course at Oregon State University affects how non-science majors view science and the scientific process. The study used research-based methods to design a reform-based lecture/lab course and implement it for students. Two top-level questions were...
:
_____________________________________________________________________
Lawrence B. Flick
The purpose of this study was to understand how instruction in an
Ascorbic acid, or vitamin C, is well known as a co-factor for proline-hydroxylase and as an anti-oxidant. However, it is also capable of forming covalent bonds, particularly in the role of a nucleophile, henceforth termed 'ascorbylation'.
The ascorbylation of electrophiles can occur under physiological conditions. Furthermore, there are a number...
Characteristics of minke whale (Balaenoptera acutorostrata) habitat at the head of the Laurentian Channel in the St. Lawrence Estuary, Canada were identified by quantifying environmental and temporal habitat variables and comparing them to the presence or absence of minke whales during the summer of 1996. Identification photographs of minke whales...
At Site-300, Lawrence Livermore National Laboratory (LLNL), CA,
trichloroethene (TCE) is present along with tetraalkoxysilanes such as tetrabutoxysilane
(TBOS) and tetrakis(2-ethylbutoxy) silane (TKEBS), as subsurface contaminants.
Intrinsic transformation of TCE to cis-dichloroethene (c-DCE) was observed in the
groundwater at locations co-contaminated with TBOS or TKEBS. Attenuation of TBOS
and TKEBS...
Monitoring reproductive success, prey species composition, and colony size of marine birds has been proposed as a method of assessing changes in marine systems that are otherwise difficult to sample (Cairns 1987). I measured inter-annual and intra-seasonal variability in reproductive parameters, taxonomic composition of the diet, and adult body condition...
Habitat use and reproductive success by Merriam's wild turkey
(Meleagris gallopavo merriami) were studied in Wasco County, Oregon,
during 1981-82. This low density turkey population selectively used
forested cover types characterized by a variety of structural
features, species, and age classes. They avoided monotypic forested
cover types, used non-forested cover...
Dataparallel C is a SIMD style data-parallel programming language for MIMD computers. Dataparallel Chas been implemented on both shared memory (Sequent) and distributed memory (Intel and nCUBE) computers. Here we analyze the strengths and weaknesses of Dataparallel C by comparing the performance of compiled Dataparallel C programs with the performance...
The type section of the Mascall Formation, which is located in
the John Day Valley, is interpreted to represent a sequence of
paleosols. These fossil soils were formed on a floodplain during the
middle Miocene. The measured thickness of this section is 1340 feet,
and although the top of the...
Recent state and national standards have increased the interest in engineering at the K-12 level. Science standards, in particular, have begun to make the case for including engineering throughout the K-12 scope of study. Despite the increased attention to engineering, the characteristics and uniqueness of the field of engineering are...
Open Source Software (OSS) communities are homogenous and their lack of diversity is of concern to many within this field. This problem is becoming more pronounced as it is the practice of many technology companies to use OSS participation as a factor in the hiring process, disadvantaging those who are...
Karl Jordan (1861-1959) was an extraordinarily productive entomologist who influenced the development of systematics, entomology, and naturalists' theoretical framework as well as their practice. He has been a figure in existing accounts of the naturalist tradition between 1890 and 1940 that have defended the relative contribution of naturalists to the...
The mechanisms by which the activities of phospholipase C-β (PLC-β) enzymes are negatively regulated have not been well defined. We used cardiac-derived ratmyoblast H9c2 cells to investigate possible modes of regulation of PLC-β3 enzymes,the only endogenous β isoform abundantly found in these cells. The PLC-β3population in these cells was detected...
An investigation was undertaken to determine the role that temperature might play in limiting the distribution of the mountain beaver, Aplodontia rufa. A field study was carried on from August, 1965, through August, 1966, in the coast mountains of Benton County, Oregon, and consisted of measuring the annual temperature cycle...
A high performance liquid chromatography (HPLC)
procedure using a LiChrosorb-NH₂ column and a eluant
buffer of 75:25 (v/v) of acetonitrile:0.05 M KH₂P0₄, pH
5.95, was developed for the successful separation and
determination of ascorbic and erythorbic acids in selected
food samples.
Application of the method, which is sensitive, rapid
and...
St. Lawrence Island, Alaska is home to two Formerly Used Defense Sites (FUDS) under remediation by the U.S. Army Corps of Engineers since 1985. After more than two decades the local residents continue to be concerned about inadequate site characterization and cleanup. During the summer of 2005, I collected ethnographic...
Feeding rainbow trout 0.3-0.4 mg dieldrinlkg/d for 9-12 weeks stimulated the biliary excretion of a subsequent dose of [¹⁴C]dieldrin by 500% and [³H]7,12- dimethylbenz[a]anthracene (DMBA) by 240%. In vitro work demonstrated that this interaction occurred without induction of the cytochrome P450 system, or other hepatocellular proteins involved in metabolism. The...
Controversy regarding moral development research has given rise to a proliferation of theories competing for acceptance. For all these researchers, the work of Lawrence Kohlberg is the pivot point for comparisons, contrasts, and discussions. Still, no theories to date adequately describe and document a theoretically complete conception of moral judgment...
Quaternary Ammonium Compounds, Qams, are an important class of
chemicals which present interesting challenges to analysts. This thesis
reports results of investigations on uses of ion-pairing techniques for
separations and detection of Qams. Special apparatus for post-column
solvent extraction of liquid chromatographic eluates was developed as
part of this work....
A unique mass-flow control system for the carrier gas
in gas chromatography is described and evaluated. Carrier
gas flow is controlled by a flow sensor, feedback electronics,
a flow-control valve and a microcomputer. The
flow-rate is monitored by a mass-flow meter by this system
and the flow is adjusted in...
Integration methods for enzymatic reactions were applied to
transducer response vs. time curves which exhibit maxima, minima or
inflections. The difference between the integral of the time
dependent response and the initial response, often zero, is related
to the initial enzyme activity or substrate concentration. Fluorescence response curves which exhibit...
The Lawrence Memorial Grassland Preserve, located in
Wasco County, Oregon, exhibits a wide variety of soil mounds and
patterned ground features. The size, shape, and distribution of
several elements of this peculiar landscape were analyzed with a
detailed map, field observations, and statistical procedures.
Common soil mound shapes are circular,...
Dataparallel C has been designed for various kinds of architectures and was developed jointly at University of New Hampshire and Oregon State University.
This project dealt with porting the libraries to the nCUBE 2 system and helping a user compile his programs on nCUBE 2 directly from a Sun workstation...
A compartmental model of the immune system is simulated.
Chapter I discusses the importance of such a
model, reviews past immune system models, and summaries
the immunological theory the model is based upon. In
Chapter II, the compartmental representation of the immune
system is developed from immunological and physiological
theory....
A microscopic study was conducted on specific gravity wafers taken from standard tensile strength specimens of young growth Douglas-fir. Samples were studied to determine the effect of variables such as percent summerwood, fiber length and fibril angle on tensile strength of Douglas-fir. The sample specimens were picked so effects of...
This paper is a study of various linear Metal-Oxide-
Semiconductor integrated circuit configurations with the
goal of improving their operation. The operation of MOS
devices is covered including their use as load devices
to replace diffused resistors. The advantages and disadvantages
of the resulting circuits as well as possible
physical...
Studying human’s ability to estimate temporal durations could lead to a greater
understanding of our cognitive abilities as well as the processes that underlie temporal
estimation. It has been shown through previous research that time and number may be
interconnected cognitively and that the magnitude of one may alter the...
Reform in science education has often emphasized task-based learning as an instructional method to improve student understanding and retention of concepts, and to promote the development of reasoning and problem-solving. Yet studies assessing student knowledge at the beginning and end of a task-based class show mixed results. Students in task-based...
On a daily basis, employees in the service industry manage their emotional and physical displays, both to their coworkers and customers. Whether this management is for personal gain or organizational requirement, these attempts to manage other’s impressions can have important personal effects. Specifically, when managing emotional displays to customers, there...
Few studies analyze the relationship between ecological knowledge and public preferences for natural resource management options. The Central Cascades Adaptive Management Area (CCAMA) and McKenzie watershed of western Oregon provides an opportunity to examine the relationship. This research project employs a mixed model approach to explore public knowledge of forest...
Provides information about complexity of watersheds. Outlines ways to form partnerships, to develop strategies for enhancing watershed resources, and to implement enhancement projects.
Full Text:
likely to end up
somewhere else.
—Lawrence J. Peters
hroughout the United States, citizens are
A cultivar comparison study was conducted to identify similarities
and differences in cane characteristics between 2 primocane fruiting
red raspberry cultivars and to determine if the differences and
similarities can help determine cultural practices that may improve
productivity. The comparison of the cultivars 'Amity1 and 'August
Red' showed a difference...
Clostridium perfringens is the causative agent of gas gangrene and the 3rd most common cause of type A food borne disease in the United States. Critical to the pathogenicity of C. perfringens is the ability of this bacterium to produce highly resistant, metabolically dormant spores that can resume metabolic function...
Commercially bottled, vitamin C-fortified, cranberry
juice cocktail and cranberry-apple (cranapple) juice
drinks were stored at 5°C under simulated home-use
conditions. Ascorbic acid (AA) and dehydroascorbic acid
(DHA) levels were evaluated over a period of seven days by
high performance liquid chromatography (HPLC). Total
vitamin C content was also determined by...
Biliary excretion of taurocholate in thermally acclimated rainbow trout was stimulated at higher environmental temperature (18 vs. 14 or 10° C)e Acute 4° C shifts in body temperature produced more pronounced changes in biliary excretion. Thermally modulated biliary excretion was negatively correlated with plasma half live of taurocholate. Absorption of...
Temperature influences the incidence of chemically induced cancer in fish,
with warmer temperatures being associated with higher cancer incidence. The
mechanisms of temperature-modulated chemical carcinogenesis in fish, however,
have not been described in detail. Therefore, one primary objective of this study
was increased understanding of how temperature-modulated genotoxicity of 7,12-...
Chlordecone belongs to the class of persistent organochlorine pesticides that are remarkably resistant to environmental degradation. Even though their use was banned in the United States in 1978, these compounds can still be detected in both humans and wildlife throughout the world. Previous work has shown that the pretreatment of...
Overtly non-toxic doses of organochlorine (OC) insecticides perturb lipid homeostasis
in mice and rats. To increase understanding of how chlordecone (CD), an OC
insecticide, modulates cholesterol (CH) homeostasis, we determined the effect of CD
pretreatment on the tissue and hepatic subcellular distribution of exogenous [¹⁴C]CH. Corn oil alone or CD...
A cruise of the R/V Yaquina off Oregon during June and July of
1968 provided data for a study of the relationships of hydrographic
and chemical parameters to estimates of biological activity. The
emphasis was on carbon and nitrogen reservoirs. Phytoplankton pigments,
nitrogen and C/N ratio were used along with...
A simplified autoradiographic method for estimating species-specific
phytoplankton production rates in mixed natural communities
was evaluated in the laboratory and employed in the field. Laboratory
experiments were designed to test the reliability and variability of
the simplified method. Assays of ¹⁴C uptake by liquid scintillation
spectrometry were used to evaluate...
Effects of diet on food energy utilization by grass
carp fed aquatic plants or formulated diets with varied
lipid sources and levels are presented in three
manuscripts. Significant effects of diet on food
consumption, digestion, growth and muscle fatty acid (FA)
composition of fingerling diploid grass carp fed aquatic
macrophytes...
Previous studies have shown that rainbow trout exposed to dieldrin via diet for 9 to 12 weeks increased biliary excretion of a subsequent dose of [¹⁴C]dieldrin by 500%. This was not explained by induction of the cytochrome P-450 (CYP) system involved in oxidative metabolism of these compounds. We hypothesized that...
The purpose of this study was to investigate the knowledge base and instructional
practices of two highly qualified experienced secondary mathematics teachers within
the context of their classrooms during a unit in a geometry class. Data collected from
interviews, classroom observations, pre and post-observation questionnaires, and
detailed analyses of several...
Factors that influenced the uptake, storage, and elimination of dietary quinoline by rainbow trout (Salmo gairdneri) were studied to obtain an understanding of the mechanisms affecting the bioaccumulation of dietary contaminants in teleosts. Rainbow trout readily absorbed ¹⁴C-quinoline from pelleted food (1% ration at 138 ug quinoline/g food) and most...
Rocks south of the Main Mantle Thrust (MMT) in Swat,
Pakistan consist predominantly of Precambrian to Paleozoic
granitic gneisses and metasedimentary rocks that represent
the deformed and metamorphosed northern margin of the Indian
subcontinent. In the Karakar Pass area the rocks are divisible into three lithologic units: the Swat granite...
In this paper we investigate how hospitals can create a more inclusive climate in their organizations that can foster an environment where all employees and, in turn, patients feel welcome. We ask the question of whether it is leaders or employees that have the agency to create this climate that...
Vibrio marinus MP-1 (ATCC 15381) deaminated nine of seventeen
amino acids tested with L-glutamine being deaminated to the greatest
and L-serine to the second greatest extent in one hour. The optimum
pH for the L-serine deamination was 8.4.
The response of washed cells to temperature on the deamination
of L-serine...
Polycyclic aromatic hydrocarbons (PAHs) are significant pollutants in aquatic environments. Many are carcinogenic and lead to DNA fragmentation and adduct formation in marine and freshwater organisms. Previous research demonstrates that rainbow trout (Oncorhynchus mykiss) compensate to long-term PAH dietary exposures and reduce the DNA damage.
The aim of this study...
A simple atmosphere and ocean model of relevance to El Nino
and Southern Oscillation (ENSO) is discussed. Both the
atmosphere and ocean models are two layer, three
dimensional, linear and baroclinic, and generally follow
the Oregon State University coupled general circulation
model. However, the parameterization differs considerably
from previous work...
During the years between 1930 and 1950 a number of attempts
were made to introduce techniques and ideas from cytology,
ecology, and genetics into the field of taxonomy. Advocates of
this "experimental taxonomy" believed that cytological, ecological,
and genetic techniques would provide a rigorous, objective
methodology to replace the traditional...
Large-volume (20-liter) bioassays were carried out in order to
assess the effects of major nutrients and micro-nutrients on
natural phytoplankton populations in water collected from a site
close to the mouth of Yaquina Bay, Oregon. Seven long-term
experiments were conducted during the years 1975-1976. A stripping
technique employing activated carbon...
A method for measuring food carbon assimilation in the copepod
Calanus finmarchicus was developed, using the diatom Ditylum
brightwelli as food. The amount of particulate food carbon ingested
was determined as the difference between CHN analyzer analyses for
particulate food carbon of pre- and post-grazed food suspensions.
The fraction of...
Numerical simulation of the January and July global
climate with the OSU two-level atmospheric general circulation
model has generated time series of the global
distribution of selected climatic variables. Analyses of
these data for the kinetic energy and available potential
energy based on 31-day time mean statistics have been
made...
The dynamical nature of atmospheric disturbances in
the Southern Hemisphere simulated by a two-level general
circulation (GCM) model is studied. Time series of the
dependent variables and diabatic heating components from
10 Southern Hemisphere winters (JJA) and summers (DJF)
simulated by the Oregon State University two-level GCM are
used. The...
This research focused on the use of classical and modern two-dimensional spectral estimation techniques for enhancing inverse synthetic aperture radar (ISAR) imagery. 2-D Classical spectral estimation methods and 2-D modern parametric and non-parametric spectral estimation methods are applied to simulated and real data sets in order to achieve both range...
Global increases in ultraviolet-B radiation (UVBR:290-
320 nm) resulting from decreases in stratospheric ozone
concentration have the potential to alter marine primary
production and affect global climate and marine trophic
dynamics. Effects of UVBR on phytoplankton carbon fixation
were determined from open ocean exposure studies conducted
off the coast of...
Purpose of the Study: This study was undertaken as a result of interest in the
introduction of guide groups into the operation of secondary
schools. Particularly when viewed from the historical perspective
of the times in which it was initiated, the guide group concept
offers an opportunity to examine the...
A chemostatic system was developed for the long term studies
of population dynamics of chain forming diatoms. Vessel volume
rather than flow rate was varied in these systems to obtain different
growth rates at steady state in systems with an equal capacity to
produce.
Population level responses to high dilution...
The main contributions of this thesis are the development and
application of four computationally efficient solutions for
least-squares-based (LS-based) minimum variance spectral estimation
(MVSE). They are: (1) fast computational solution for the 1-D
covariance LS-based MVSE, (2) fast computational solution for the
1-D modified covariance LS-based MVSE, (3) fast computational...
During the past 30 years, numerous studies have focused on the toxicities of polycyclic aromatic hydrocarbons (PAH). Laboratory and field studies have helped elucidate the detrimental effects of these chemicals on growth, reproduction and immune response. Polycyclic aromatic hydrocarbons are in the priority list of chemicals to be studied by...
Two Oregon reservoirs contaminated by different mercury
sources were compared for mercury distribution in sediment and
bioaccumulation by fish. The average mercury concentration in
the sediment of Cottage Grove reservoir (0.67 ± 0.05 μg/g dry
wt) was higher than for Dorena Reservoir (0.12 ± 0.01 μg/g dry
wt). Sediment mercury...
Liver X receptor (LXR), farnesoid X receptor (FXR) and peroxisome proliferator-activated receptor (PPAR) are adopted orphan nuclear receptors that function as lipid sensors. These receptors respond to cellular lipid levels and regulate the expression of target gene. Previously, it was demonstrated that low doses of chlordecone (CD) pretreatment disturbed exogenous...
Rats exposed to one or two doses of 60 mg mirex/kg
by gavage exhibited hypertrophied livers and various
degrees of hepatobiliary dysfunction. Although single
dosed animals demonstrated elevated whole liver bile flow
after 96 hours, the single dose was insufficient to
significantly inhibit whole liver hepatobiliary
performance as measured by...
Persistent organochlorines (OCs) bioaccumulate in aquatic biota and potentially impair reproduction via endocrine disruption. The present research evaluated estrogenic effects of the OCs, chlordecone (CD) and o,p'-DDT/DDE, and the antiestrogenicity of 3,4,5,3',4',5'-hexachlorobiphenyl (345-HCB) in juvenile rainbow trout, utilizing vitellogenesis as a biomarker. Vitellogenesis, estrogen regulated hepatic production of the yolk...