Wild-caught juvenile Steller sea lions Eumetopias jubatus (n = 21) were maintained in temporary captivity for up to 12 wk to investigate health, disease, nutrition and behavior. We assessed the effects of captivity on post-release dive behavior and movement of each animal using externally mounted satellite data recorders. Based on...
Genetic code expansion is a technology that allows for site-specific incorporation of noncanonical amino acids into recombinant proteins at amber stop codons using engineered translational machinery. The technology allows for expanded study into proteins, derived from the integration of novel chemical functions found in noncanonical amino acids, such as fluorescence,...
Boreal and temperate biomes host nearly half of the earth’s forested ecosystems. The temperate rainforests of the Pacific coast of North America constitute nearly half of all temperate rainforests on earth. Along the northern extent of this region, the perhumid and sub-polar rainforests of southeast and southcentral Alaska are among...
In nanoscale materials, the Coulombic interaction between electrons are stronger than in bulk materials. These stronger interactions, caused by confinement and reduced dielectric screening, have interesting consequences for light-matter interactions. In carbon nanotubes (CNTs), strong interactions can enhance the impact ionization process, and thus assist photocurrent generation in CNTs. Conversely,...
Metamorphosed volcanogenic rocks of the Permian and Triassic Seven Devils Group are exposed in the northern part of the Heavens Gate 7.5 minute quadrangle, western Idaho. These rocks originated in a volcanic arc at a destructive plate margin. In the north, rocks that probably belong to the Lower Permian Hunsaker...
Metamorphosed volcanogenic rocks of the Permian and Triassic Seven Devils Group are exposed in the northern part of the Heavens Gate 7.5 minute quadrangle, western Idaho. These rocks originated in a volcanic arc at a destructive plate margin. In the north, rocks that probably belong to the Lower Permian Hunsaker...
Metamorphosed volcanogenic rocks of the Permian and Triassic Seven Devils Group are exposed in the northern part of the Heavens Gate 7.5 minute quadrangle, western Idaho. These rocks originated in a volcanic arc at a destructive plate margin. In the north, rocks that probably belong to the Lower Permian Hunsaker...
Metamorphosed volcanogenic rocks of the Permian and Triassic Seven Devils Group are exposed in the northern part of the Heavens Gate 7.5 minute quadrangle, western Idaho. These rocks originated in a volcanic arc at a destructive plate margin. In the north, rocks that probably belong to the Lower Permian Hunsaker...
Memory is essential to everyday life. As we age, deficits in memory become apparent. The toll of age-related cognitive impairment can be devastating to families and costly to society. The NMDA receptor is a molecule in the brain that is instrumental in the formation of memories. The receptor is particularly...
This study models the household demand for vehicle miles traveled with a focus on the effects from bicycle ridership and transit ridership. Through the use of data from the Oregon Household Activity Survey collected on behalf of the Oregon Department of Transportation, evidence is found that households participating in bicycle...
NADPH-cytochrome P-450 reductase, an important enzyme in the
cytochrome P-450-dependent microsomal monooxygenase system, was
purified from insecticide-resistant (R) and -susceptible (S) house
flies (Musca domestica, L.) and from the black blow fly (Phormia
regina, Weigen). Proteolytic degradation to a P-450 - inactive form
of the reductase was reduced during the...
A forward-chaining logic programming system (FORLOG) has been developed at Oregon State University. This system coupled with an assumption-based truth maintenance system (ATMS), provides an alternative to the logic programming paradigm of backward-chaining with Horn clauses. To compare FORLOG to this paradigm, we define a subset of FORLOG, called mini-FORLOG,...
Determination of the source and fate of natural (higher plant lipids, marine
lipids, etc.) and anthropogenically (e.g., petroleum, coal emissions) derived
hydrocarbons and oxygenated compounds in the environment was accomplished
using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS)
to characterize or identify molecular biomarkers to be utilized as tracers....
As part of a study to determine the history and potential for conflict in international freshwater
basins, an estimate was made of the location of arable and irrigable land in the world.
Knowledge about the world's arable and irrigable land was desired since this information could
be an indicator of...
Microscale fluid processes are an increasingly important subgroup of fluid mechanics. Applications for heat transfer and micro-electro-mechanical devices use flows on the scale of less than one hundred microns. This study is part of a larger work in which a multiphase, high shear environment is studied in a microchannel that...
As ornamental container nurseries face diminishing water allocations, many are looking to automated irrigation solutions to increase their water application efficiency. This thesis presents the findings of a study conducted at a commercial container nursery to determine 1) whether a capacitance or load cell sensor was better suited for monitoring...
Proper nitrogen (N) management and variety selection are important for profitable hard red winter (HRW) wheat production in the dryland growing regions of northeastern Oregon. In these dryland systems, N management for grain yield and grain protein concentration (GPC) is challenging due to climatic and year-to-year variation in production environments....
Metamorphosed volcanogenic rocks of the Permian and Triassic Seven Devils Group are exposed in the northern part of the Heavens Gate 7.5 minute quadrangle, western Idaho. These rocks originated in a volcanic arc at a destructive plate margin. In the north, rocks that probably belong to the Lower Permian Hunsaker...
At the start of the 21st century much of the focus of aircraft design has been turned to unmanned aerial vehicles (UAVs) which generally operate at much lower speeds in higher risk areas than manned aircraft. One subset of UAVs are Micro Air Vehicles (MAVs) which usually are no larger...
This research seeks to understand the influences of perception on land use around
the Mount Hood area of Oregon and evaluate how it has evolved over the past 4,000
years. The study addresses three specific questions:
1) How has the study area evolved over time into the modern landscape?
2)...
Vessel traffic places the sensitive environmental, natural, and cultural resources of Washington’s outer coast at risk of oil or hazardous materials spills. In 1995, International Maritime Organization established the Area to be Avoided off the Washington Coast (ATBA) to reduce this risk. Annual estimates of vessel compliance with the ATBA...
The Oregon State University Mars MM5 was used in a comprehensive high-resolution study of northern polar summertime circulations. Three simulations (Ls = 120, Ls = 135, and Ls = 150) characterize the changing circulation. The atmosphere is dry, and model dynamics are hydrostatic. A modified TES thermal inertia map provides...
Modeling of slope flow circulations in idealized axisymmetric craters is used to understand (1) the large surface pressure amplitude observed in Gale Crater by the Rover Environmental Monitoring Station and (2) the shallow convective boundary layer (CBL) suggested by Curiosity imagery. Air temperatures vary within craters with greater amplitudes than...
Full Text:
1Daniel Tyler, Jr and 1Jeffrey R. Barnes
1College of Earth Ocean and Atmospheric Science, Oregon State
Modeling of slope flow circulations in idealized axisymmetric craters is used to understand (1) the large surface pressure amplitude observed in Gale Crater by the Rover Environmental Monitoring Station and (2) the shallow convective boundary layer (CBL) suggested by Curiosity imagery. Air temperatures vary within craters with greater amplitudes than...
Full Text:
and the depth
of the convective boundary layer
Daniel Tyler Jr.1 and Jeffrey R. Barnes1
1College of
Modeling of slope flow circulations in idealized axisymmetric craters is used to understand (1) the large surface pressure amplitude observed in Gale Crater by the Rover Environmental Monitoring Station and (2) the shallow convective boundary layer (CBL) suggested by Curiosity imagery. Air temperatures vary within craters with greater amplitudes than...
For a key season in the annual water cycle (L[subscript s]~120°) a mesoscale model is used to study atmospheric water vapor and water ice clouds in the northern polar region of Mars. Model results at high-resolution (15 km) allow the examination of various mesoscale aspects of the circulation in this...
Clostridium difficile is the causative agent of the majority of antibiotic associated diarrheas. C.
difficile spores are recognized as the morphotype of transmission, infection and persistence.
However, there is a lack of knowledge on how C. difficile spores interact with the host’s
epithelial surfaces. In this context, we have characterized...
Clostridium perfringens type A is the causative agent of a variety of histotoxic and enteric diseases. The ability of C. perfringens spores to germinate in vivo might be due to the presence of nutrient germinants in the host tissue and blood. In the current study, we investigated the ability of...
Carbon nanotube (CNT) photodiodes have potential to convert light into electrical current with high efficiency. However, previous experiments have revealed photocurrent quantum yield (PCQY) well below 100%. In this work, we show that axial electric field increases the PCQY of CNT photodiodes. In optimal conditions our data suggest PCQY >...
Cascade, Chinook, and Centennial hops are used extensively throughout the brewing industry either individually or in various combinations to add hoppy aroma to beer. This high use of hops, particularly via late- or dry-hopping, creates a need to better understand the chemical contribution of these hop varieties during dry-hopping beer...
PN junctions in nanoscale materials are of interest for a range of technologies including photodetectors, solar cells, and light-emitting diodes. However, Schottky barriers at the interface between metal contacts and the nanomaterial are often unavoidable. The effect of metal-semiconductor interfaces on the behavior of nanoscale diodes must be understood, both...
We study photocurrent generation in individual suspended carbon nanotube pn junctions using spectrally-resolved scanning photocurrent microscopy. Spatial maps of the photocurrent allow us to determine the length of the pn junction intrinsic region, as well as the role of the n-type Schottky barrier. We show that reverse-bias operation eliminates complications...
An abandoned cinnabar mining and roasting site is in the major sub-basin of the
watershed for Cottage Grove Reservoir, Oregon. Average surface sediment total
mercury concentration in the river draining this sub-basin (0.61±0.52 μg /g) was
about ten-fold higher than three smaller tributaries to the reservoir. Total mercury in reservoir...
The “product” travel cost model (PTC) improves supply and substitution specification in travel cost
models (TCM), eliminating common biases in estimating welfare effects of qualitative changes at specific
sites. Angling sites and participation are modeled as a system of product supplies and demands; changes
in angling quality at specific sites...
Acetylene is a slow-binding inhibitor of the Ni- and Fe-containing dimeric hydrogenase isolated
from Azotobacter vinelandii. Acetylene was released from hydrogenase during the recovery from inhibition.
This indicates that no transformation of acetylene to another compound occurred as a result of the interaction
with hydrogenase. However, the release of C2H2...
Nitrobacter hamburgensis X14 is a facultative lithoautotroph that conserves energy from the
oxidation of nitrite (NO
2 ) and fixes carbon dioxide (CO2) as its sole source of carbon. The
availability of the N. hamburgensis X14 genome sequence initiated a re-examination of its
mixotrophic and organotrophic potential, as genes encoding...
In late May of 2008, the NASA/JPL Phoenix spacecraft will touch down near its targeted landing site on Mars (68.2°N, 126.6°W). Entry, descent, and landing (EDL) occurs in the late afternoon (~1630 hours local solar time (LST)) during late northern spring (Ls ~ 78°). Using a mesoscale and a large-eddy...
The environmental fate of conifer resins and their natural product compounds as mixtures is of importance for source, alteration, and transport studies. The compound compositions of resins of the common Callitris species (Cupressaceae) based on gas chromatography-mass spectrometry have not been reported. Results show that diterpenoids were the most abundant...
Fin whales (Balaenoptera physalus) have a global distribution, but the population inhabiting the Gulf of California (GoC) is thought to be geographically and genetically isolated. However, their distribution and movements are poorly known. The goal of this study was to describe fin whale movements for the first time from 11...
Two-photon, planar laser-induced fluorescence (PLIF) of carbon-monoxide (CO) and two-dimensional thermometry employing two-color, hydroxyl radical (OH) PLIF are used to characterize atmospheric-pressure inverse diffusion flames. These flames are important tools to aid the understanding of secondary reaction zones that may form in gas turbine engines when film-cooling air reacts with...
The protein palmitoylation cycle has been shown to be important for protein signaling and synaptic plasticity. Data from our lab showed a change in the palmitoylation status of certain proteins with age. A greater percentage of the NMDA receptor subunits GluN2A and GluN2B, along with Fyn and PSD95 proteins, were...
The NMDA receptor is an important component of spatial working and reference memory. The receptor is a heterotetramer composed of a family of related subunits. The GluN2B subunit of the NMDA receptor appears to be essential for some forms of memory and is particularly vulnerable to change with age in...
Mortality and injuries caused by ship strikes in U.S. waters are a cause of concern for the endangered population of blue
whales (Balaenoptera musculus) occupying the eastern North Pacific. We sought to determine which areas along the U.S.
West Coast are most important to blue whales and whether those areas...
Mortality and injuries caused by ship strikes in U.S. waters are a cause of concern for the endangered population of blue
whales (Balaenoptera musculus) occupying the eastern North Pacific. We sought to determine which areas along the U.S.
West Coast are most important to blue whales and whether those areas...
Full Text:
Ladd M. Irvine1*, Bruce R. Mate1, Martha H. Winsor1, Daniel M. Palacios2,3¤, Steven J. Bograd3,
Daniel
Mortality and injuries caused by ship strikes in U.S. waters are a cause of concern for the endangered population of blue whales (Balaenoptera musculus) occupying the eastern North Pacific. We sought to determine which areas along the U.S. West Coast are most important to blue whales and whether those areas...
During the past several years, grape acreages have increased significantly in Washington and Oregon (17 percent and 23 percent, respectively, from 1999 to 2002). Unfortunately, herbicide drift can pose a major threat to the growth
and success of commercial grape production adjacent to areas of small grain, hay, grass seed,...
The idea that climatically modulated erosion may impact orogenic processes has challenged geoscientists for decades. Although modeling studies and physical calculations have provided a solid theoretical basis supporting this interaction, to date, field-based work has produced inconclusive results. The central-western Alborz Mountains in the northern sectors of the Arabia-Eurasia collision...
The GluN1 subunit of the NMDA receptor shows age-related changes in its
expression pattern, some of which correlate with spatial memory performance in mice.
Aged C57BL/6 mice show an age-related increase in mRNA expression of GluN1
subunit splice variants that lack the N terminal splice cassette, GluN1ₒₓₓ (GluN1-a). This
increase...
The Samoan Passage experiment was designed to determine the northward transport of abyssal water through the Samoan Passage (l0°S, 170°W). This topographic constriction forms the major connection for deep (>4000 m) interbasin flow between hemispheres in the Pacific (Figure 1). This report presents current meter data from the six subsurface...
1. Rearing environments can shape offspring phenotype across taxa, yet little is known about how brood size influences hypothalamic-pituitary axis functioning, whether its expression trades off with growth, and the degree to which these -relationships vary between species.
2. We evaluated how brood size influenced nestling physiological (glucocorticoids) and somatic...
Suspended metallic carbon nanotubes (m-CNTs) exhibit a remarkably large transport gap that can exceed 100 meV. Both experiment and theory suggest that strong electron-electron interactions play a crucial role in generating this electronic structure. To further understand this strongly-interacting system, we have performed electronic measurements of suspended m-CNTs with known...
Here, we describe and demonstrate a geographic information systems-based lithic morphometric research (GLiMR) software approach. GLiMR accurately and rapidly handles a sequence of ArcGIS procedures to extract geometric morphometric data from 2D and 3D scan files of lithic artifacts. GLiMR generates three main types of geometric properties: shape data, topographic...
Here, we describe and demonstrate a geographic information systems-based lithic morphometric research (GLiMR) software approach. GLiMR accurately and rapidly handles a sequence of ArcGIS procedures to extract geometric morphometric data from 2D and 3D scan files of lithic artifacts. GLiMR generates three main types of geometric properties: shape data, topographic...
Here, we describe and demonstrate a geographic information systems-based lithic morphometric research (GLiMR) software approach. GLiMR accurately and rapidly handles a sequence of ArcGIS procedures to extract geometric morphometric data from 2D and 3D scan files of lithic artifacts. GLiMR generates three main types of geometric properties: shape data, topographic...
A field campaign, the Slope Experiment near La Fouly (SELF-2010), was conducted to monitor the evening transition of slope flows on clear-sky days from July to September 2010 in a narrow valley of the Swiss Alps. A steep west-facing slope with inclinations ranging from 25° to 45° was instrumented from...
Full Text:
Flow during the evening transition over steep Alpine slopes
Daniel F. Nadeau,a,b* Eric R. Pardyjak,c
A field campaign, the Slope Experiment near La Fouly (SELF-2010), was conducted to monitor the evening transition of slope flows on clear-sky days from July to September 2010 in a narrow valley of the Swiss Alps. A steep west-facing slope with inclinations ranging from 25° to 45° was instrumented from...
Full Text:
slopes 1
Flow during the evening transition over steep alpine slopes
Daniel F. Nadeaua,b∗, Eric R
The impact of herbivores on primary producers in differing oceanographic
regimes is a matter of intense ecological interest due to ongoing changes in their abundance,
that of their predators, and anthropomorphic alteration of nutrient cycles and climatic
patterns. Interactions between productivity and herbivory in marine habitats have been
studied on...
Full Text:
Archives M084-014-A2
Luis R. Vinueza, Bruce A. menge, Diego Ruiz, and Daniel M. Palacios. 2014
The impact of herbivores on primary producers in differing oceanographic
regimes is a matter of intense ecological interest due to ongoing changes in their abundance,
that of their predators, and anthropomorphic alteration of nutrient cycles and climatic
patterns. Interactions between productivity and herbivory in marine habitats have been
studied on...
Full Text:
Archives M084-014-A1
Luis R. Vinueza, Bruce A. menge, Diego Ruiz, and Daniel M. Palacios. 2014
The impact of herbivores on primary producers in differing oceanographic
regimes is a matter of intense ecological interest due to ongoing changes in their abundance,
that of their predators, and anthropomorphic alteration of nutrient cycles and climatic
patterns. Interactions between productivity and herbivory in marine habitats have been
studied on...
Full Text:
Galápagos intertidal meta-ecosystem
LUIS R. VINUEZA,1,2 BRUCE A. MENGE,2,7 DIEGO RUIZ,3,4 AND DANIEL M
Despite its very low oral bioavailability and rapid elimination, multiple reports of unexpectedly high bisphenol A (BPA) concentrations in the serum of pregnant mothers or cord blood have raised questions about BPA exposures during pregnancy. Thirty healthy pregnant women recruited to the study were evaluated for total BPA exposure over...
Despite its very low oral bioavailability and rapid elimination, multiple reports of unexpectedly high bisphenol A (BPA) concentrations in the serum of pregnant mothers or cord blood have raised questions about BPA exposures during pregnancy. Thirty healthy pregnant women recruited to the study were evaluated for total BPA exposure over...
Despite its very low oral bioavailability and rapid elimination, multiple reports of unexpectedly high bisphenol A (BPA) concentrations in the serum of pregnant mothers or cord blood have raised questions about BPA exposures during pregnancy. Thirty healthy pregnant women recruited to the study were evaluated for total BPA exposure over...
Despite its very low oral bioavailability and rapid elimination, multiple reports of unexpectedly high bisphenol A (BPA) concentrations in the serum of pregnant mothers or cord blood have raised questions about BPA exposures during pregnancy. Thirty healthy pregnant women recruited to the study were evaluated for total BPA exposure over...
Despite its very low oral bioavailability and rapid elimination, multiple reports of unexpectedly high bisphenol A (BPA) concentrations in the serum of pregnant mothers or cord blood have raised questions about BPA exposures during pregnancy. Thirty healthy pregnant women recruited to the study were evaluated for total BPA exposure over...
Despite its very low oral bioavailability and rapid elimination, multiple reports of unexpectedly high bisphenol A (BPA) concentrations in the serum of pregnant mothers or cord blood have raised questions about BPA exposures during pregnancy. Thirty healthy pregnant women recruited to the study were evaluated for total BPA exposure over...
Large-scale poisoning events are common to scavenging bird species that forage communally,
many of which are in decline. To reduce the threat of poisoning and compensate for other persistent threats,
management, including supplemental feeding, is ongoing for many reintroduced and endangered vulture
populations. Through a longitudinal study of lead exposure...
Large-scale poisoning events are common to scavenging bird species that forage communally,
many of which are in decline. To reduce the threat of poisoning and compensate for other persistent threats,
management, including supplemental feeding, is ongoing for many reintroduced and endangered vulture
populations. Through a longitudinal study of lead exposure...
Full Text:
Reintroduction
TERRA R. KELLY,∗ JESSE GRANTHAM,† DANIEL GEORGE,‡ *** ALACIA WELCH,‡
JOSEPH BRANDT,† L. JOSEPH
Recent work has suggested that plants differ in their relative
reliance on structural avoidance of embolism versus maintenance
of the xylem water column through dynamic traits such
as capacitance, but we still know little about how and why
species differ along this continuum. It is even less clear how
or...
Full Text:
, D. R. (2014), The
dynamic pipeline: hydraulic capacitance and xylem hydraulic safety in four tall