Chlorella is a genus of unicellular, enkaryotic green algae. Chlorella-like algae
are found as endocellular symbionts within a number of animal species. Two chloroplast
genes were sequenced from the exsymbiotic strain Chlorella N la, originally isolated
from Paramecium bursaria. The genes for the large subunit of ribulose-1,5-bisphosphate
carboxylase/oxygenase (rbcL) and...
Between Oregon State University and DHBW Ravensberg, Global Formula Racing produces two Formula style vehicles every year for competition. This thesis has served as a pre-development project in the ergonomics and driver interface of the team's vehicles. This project will determine the position of the seat back, steering wheel, and...
A physical model study was performed to examine the forces and response of 1:6 scale wood-frame coastal residential structures subjected to storm surge and waves. An on-grade and an elevated specimen were tested and exposed to regular waves with varying water depths and wave heights to simulate Hurricane Sandy’s conditions....
As a way to improve safety and economics, one area of research and commercialization of new nuclear power plants has focused on the development of small modular reactors (SMRs). NuScale Power has developed a 50 MWe natural convection cooling SMR coupled with a regenerative Rankine cycle. Current estimates place the...
The purpose of this thesis is to increase the positional accuracy of Global Position System (GPS) modules using an artificial intelligence algorithm. Three basic and identical GPS modules were setup in an equilateral triangle formation with side lengths of one meter. The triangle was placed in four separate locations where...
Like other species interactions in ecological systems, host-pathogen interactions are influenced by environmental factors, landscape characteristics and the broader community context. My thesis explores the potential influences of food-web interactions (Chapter 2), climate change (Chapter 3), landscape structure and host movement patterns (Chapter 4), and the combined influences of local...
Knowledge of stand structure, stand dynamics, and production ecology of species mixtures lags well behind that of single-species, even-aged stands. Two mixed-species spacing trials in central Oregon allowed investigation of mixed-species dynamics in a controlled experimental setting. The first site, Pringle Butte, is a mixture of ponderosa pine (Pinus ponderosa...
The synthesis of isoindazoles bearing α-ketoester and α-hydroxyester groups via the coarctate cyclization of ester terminated azo-ene-yne precursors is described. Whereas previous studies on isoindazole formation have shown the reaction to proceed through a kinetic coarctate pathway, functionalization of the terminal acetylene with a methyl ester sufficiently stabilizes the carbene...
Capacity reduction programs in the form of buybacks or decommissioning programs have had relatively widespread application in fisheries in the US, Europe and Australia. A common criticism of such programs is that they remove the least efficient vessels first, resulting in an increase in average efficiency of the remaining fleet....
Aircraft-based in situ measurements of cirrus cloud ice water content (IWC) are
important for cloud microphysical/radiative modeling and satellite validation studies, yet
the measurements have proven challenging due, in part, to the large dynamic range of
IWC values present in cirrus clouds. To date, three instruments designed for the
measurement...
Excess fat intake can increase lipid oxidation and expression of mitochondrial proteins, indicating remodeling of the mitochondrial proteome. Yet intermediates of lipid oxidation also accumulate, indicating a relative insufficiency to completely oxidize lipids. We investigated remodeling of the mitochondrial proteome to determine mechanisms of changes in lipid oxidation following high-fat...
Chordomas are uncommon neoplasms arising from notochord remnants, most commonly
occurring in the axial skeleton. Extraskeletal soft tissue chordomas are rare primary tumors, and
primary intestinal chordomas have not been reported. Herein we report 24 cases of spontaneous
primary intestinal chordomas in zebrafish, as well as 9 spontaneous vertebral chordomas....
Chordomas are uncommon neoplasms arising from notochord remnants, most commonly
occurring in the axial skeleton. Extraskeletal soft tissue chordomas are rare primary tumors, and
primary intestinal chordomas have not been reported. Herein we report 24 cases of spontaneous
primary intestinal chordomas in zebrafish, as well as 9 spontaneous vertebral chordomas....
Chordomas are uncommon neoplasms arising from notochord remnants, most commonly
occurring in the axial skeleton. Extraskeletal soft tissue chordomas are rare primary tumors, and
primary intestinal chordomas have not been reported. Herein we report 24 cases of spontaneous
primary intestinal chordomas in zebrafish, as well as 9 spontaneous vertebral chordomas....
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Laboratory Zebrafish (Danio rerio)
Timothy K Cooper, Katrina N. Murray, Sean Spagnoli, and Jan M
Sustaining forest resources requires a better understanding of forest ecosystem processes, and how management decisions and climate change may affect these processes in the future. While plot and inventory data provide our most detailed information on forest carbon, energy, and water cycling, applying this understanding to broader spatial and temporal...
Chordomas are uncommon neoplasms arising from notochord remnants, most commonly
occurring in the axial skeleton. Extraskeletal soft tissue chordomas are rare primary tumors, and
primary intestinal chordomas have not been reported. Herein we report 24 cases of spontaneous
primary intestinal chordomas in zebrafish, as well as 9 spontaneous vertebral chordomas....
Reproductive and endocrine disruption is commonly reported in aquatic species exposed to complex contaminant mixtures. We previously reported that Atlantic killifish (Fundulus heteroclitus) from the chronically contaminated Newark Bay, NJ, exhibit multiple endocrine disrupting effects, including inhibition of vitellogenesis (yolk protein synthesis) in females and false negative vitellogenin biomarker responses...
Given image data of a fluid flow, the flow field, < u, v >, governing the evolution of the system can be estimated using a variational approach to optical flow. Assuming that the flow field governing the advection is the symplectic gradient of a stream function or the gradient of...
The solid solutions of InGa₁₋ₓFeₓCuO₄, InFeCu₁₋ₓMgₓO₄, and InGa₁₋ₓFeₓCu₁₋ₓMgₓO₄ were
synthesized and characterized through the use of X – ray and neutron diffraction, and DC –
magnetism measurements. All compositions of InGa₁₋ₓFeₓCuO₄ are single phase and crystallize
in the R3m space group, but a transformation to the spinel InFeMgO₄ structure was...
The design of a projectile delivery system often plays a critical role in the durability and breakage patterns associated with spent projectile points. This paper presents the results of an experimental project designed to examine projectile point durability and breakage patterns between three different hafting methods. Specifically, we compare two...
Subsampling and subsequent imputation of tree heights can improve the predictive performance of stand volume estimation but may also introduce biases. Using coastal Douglas-fir data from southwest Oregon, USA, the predictive performance of several height imputation strategies for estimating stand volume was evaluated. A subsample of 1-15 trees was randomly...
This dataset is designed to capture landscape changes brought on by a severe tree mortality episode in California's southern Sierra Nevada range, by mapping multiple land cover types in a continuous way at annual time-steps throughout the mortality event. By mapping multiple land cover types we can see not only...
These high resolution (5x5-meter pixel) categorical models of land cover were created by training random forest classification models on
RapidEye (Planet Labs Inc.) satellite spectral data for each year and then predicting those models across the landscape. Training data were created by visually interpreting random plots over high resolution NAIP...
The Queen Charlotte fault (QCF) is a dextral transform system located offshore of southeastern Alaska and western Canada, accommodating ∼4.4 cm/yr of relative motion between the Pacific and North American plates. Oblique convergence along the fault increases southward, and how this convergence is accommodated is still debated. Using seismic reflection...
Where a legacy of aggressive wildland fire suppression has left forests in need of fuel reduction, allowing wildland fire to burn may provide fuel treatment benefits, thereby reducing suppression costs from subsequent fires. The least-cost-plus-net-value-change model of wildland fire economics includes benefits of wildfire in a framework for evaluating suppression...
The Queen Charlotte Fault (QCF) is a major strike-slip fault that forms the boundary between the Pacific and North American plates from 51° to 58° N. Near 53.2° N, the angle of oblique convergence predicted by the Mid-Ocean Ridge VELocity (MORVEL) interplate pole of rotation decreases from >15° in the...
Background: Medication complexity is a large determinant of adherence. Few studies have explored the relationship between cognitive impairment and medication complexity.
Objective: To evaluate whether cognitive impairment is associated with medication complexity for prescription and over-the-counter (OTC) medications.
Methods: In this cross-sectional analysis, we studied the association between cognitive impairment...
Assessing the ecological importance of clouds has substantial implications for our basic understanding of ecosystems
and for predicting how they will respond to a changing climate. This study was conducted in a coastal Bishop pine
forest ecosystem that experiences regular cycles of stratus cloud cover and inundation in summer. Our...
We report here that (4R,9Z)-hexadec-9-en-4-olide [(R)-desmolactone] is a sex
attractant or sex pheromone for multiple species and subspecies in the cerambycid
genus Desmocerus. This compound was previously identified as a female-produced
sex attractant pheromone of Desmocerus californicus californicus.
Headspace volatiles from female Desmocerus aureipennis aureipennis contained
(R)-desmolactone, and the antennae...
We report here that (4R,9Z)-hexadec-9-en-4-olide [(R)-desmolactone] is a sex
attractant or sex pheromone for multiple species and subspecies in the cerambycid
genus Desmocerus. This compound was previously identified as a female-produced
sex attractant pheromone of Desmocerus californicus californicus.
Headspace volatiles from female Desmocerus aureipennis aureipennis contained
(R)-desmolactone, and the antennae...
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(Cerambycidae:
Lepturinae)
Ray, A. M., Arnold, R. A., Swift, I., Schapker, P. A., McCann, S., Marshall, C. J
Freshwater ecosystems in the mid- to
upper-latitudes of the northern hemisphere are particularly
vulnerable to the impact of climate change as
slight changes in air temperature can alter the form,
timing, and magnitude of precipitation and consequent
influence of snowmelt on streamflow dynamics. Here,
we examine the effects of hydro-climate,...
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controls
on Plecoptera diversity and distribution in northern
freshwater ecosystems
Laura M. Kruitbos
Freshwater ecosystems in the mid- to
upper-latitudes of the northern hemisphere are particularly
vulnerable to the impact of climate change as
slight changes in air temperature can alter the form,
timing, and magnitude of precipitation and consequent
influence of snowmelt on streamflow dynamics. Here,
we examine the effects of hydro-climate,...
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hydrochemical controls on Plecoptera
diversity and distribution in northern freshwater ecosystems
Laura M
We report here that (4R,9Z)-hexadec-9-en-4-olide [(R)-desmolactone] is a sex attractant or sex pheromone for multiple species and subspecies in the cerambycid genus Desmocerus. This compound was previously identified as a female-produced sex attractant pheromone of Desmocerus californicus californicus. Headspace volatiles from female Desmocerus aureipennis aureipennis contained (R)-desmolactone, and the antennae...
Mediterranean-climate regions (med-regions) are global hotspots of endemism 40 facing mounting environmental threats associated with human-related activities, including the ecological impacts associated with non-native species introductions. We review freshwater fish introductions across med-regions to evaluate the influences of non-native fishes on the biogeography of taxonomic and functional diversity. Our synthesis...
Freshwater ecosystems in the mid- to
upper-latitudes of the northern hemisphere are particularly
vulnerable to the impact of climate change as
slight changes in air temperature can alter the form,
timing, and magnitude of precipitation and consequent
influence of snowmelt on streamflow dynamics. Here,
we examine the effects of hydro-climate,...
The 2010 Deepwater Horizon oil release posed the challenges of two types of spill: a familiar spill characterized by buoyant oil, fouling and killing organisms at the sea surface and eventually grounding on and damaging sensitive shoreline habitats, and a novel deepwater spill involving many unknowns. The subsurface retention of...
Grass carp Ctenopharyngodon idella are sometimes used as a biological tool for managing aquatic vegetation in reservoirs. Sterile, triploid fish were stocked in Devils Lake, Oregon, during 1986, 1987, and 1993 to control aquatic vegetation. We present a case study for using multiple measures on the same fish to determine...
In the North Atlantic, cold, relatively salty water sinks in the icy Labrador and Greenland seas, forming North Atlantic Deep Water (NADW). This circulates through the global ocean, driving ocean overturning and global heat transport and, thus, impacting global climate. As one of the most climatically sensitive regions on Earth,...
The state of the California Current System (CCS)
since spring 2011 has evolved in response to dissipation
of La Niña through spring and summer, resurgence of
cooler La Niña conditions in fall and winter, and finally
a transition towards ENSO-neutral conditions in spring
2012. The resurgence of La Niña was...
This report reviews the state of the California Current System (CCS) between winter 2012 and spring 2013, and includes observations from Washington State to Baja California. During 2012, large-scale climate modes indicated the CCS remained in a cool, productive phase present since 2007. The upwelling season was delayed north of...
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97365
JEFF HARDING, JOHN FIELD,
KEITH SAKUMA, SEAN HAYES,
NATHAN MANTUA
Fisheries Ecology Division
This report reviews the state of the California Current System (CCS) between winter 2012 and spring 2013, and includes observations from Washington State to Baja California. During 2012, large-scale climate modes indicated the CCS remained in a cool, productive phase present since 2007. The upwelling season was delayed north of...
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. Copepod data are based on samples
collected with a 0.5 m diameter ring net of 202 µm
mesh, hauled from
This report reviews the state of the California Current System (CCS) between winter 2012 and spring 2013, and includes observations from Washington State to Baja California. During 2012, large-scale climate modes indicated the CCS remained in a cool, productive phase present since 2007. The upwelling season was delayed north of...