Neurofilament proteins are intermediate filaments found in the neuronal cytoskeleton. Phosphorylation of these proteins is considered important for the assembly and stability of the filaments. Accurate molecular weights have been difficult to measure, largely because the high degree of phosphorylation results in M[subscript r]'S that are significantly greater than dictated...
Hop cell wall material (CWM) extracted from hop leaves (hamulus lupulus) was
purified and characterized. The total sugar content, uronic acid content and
monosaccharide composition of the CWM were determined. Galacturonic acid is the
major component in the CWM. A mixture of unsaturated oligogalacturonides were
released from purified hop CWM...
Resonance Electron Capture Mass Spectrometry (REC-MS) is a sensitive
experimental technique for the study of gas-phase compounds with positive electron
affinity. This technique was used to study a class of compounds known as
baloetbylenes containing chlorine and bromine substitutions. Haloetbylenes are an
important class of compounds because ethylene is the...
The purpose of this study was to develop a marine bioassay
procedure using eggs and larvae of Pollicipes polymerus, a stalked
barnacle common on the west coast of North America.
A series of experiments were run to determine optimal culture
conditions for the eggs, to see if they could be...
Many climatic factors influence grape berry composition including nutrient status, water availability, biotic stress, sun exposure and temperature. Previous research examined the effects of many factors listed above and much progress has been made. It is often difficult, however, to separate effects that typically confound each other, such as sun...
Wines were made from Pinot Noir and White Riesling grapes
which had received field application rates of 2 and 4 lb./acre of the
experimental bird repellent Mesurol (methiocarb or 3, 5 dimethyl-
4(methylthio)phenylmethylcarbamate). In addition, Pinot Noir must
and press juice and White Riesling press juice were fortified with
15...
The unfolding of human retinoid X receptor α in the presence of the denaturant guanidine HCl was studied using stopped-flow absorbance spectroscopy. The protein's four native cysteine residues were mutated to obtain four single-cysteine mutants, each with the other three cysteine residues mutated to alanine. The thiols of these hRXRα...
The rhenium (V) complex Tp'ReO₂ (Tp' = hydrido-tris-(3,5-
dimethylpyrazolyl)borate), generated in situ from PPh₃ reduction of
Tp'Re0₃, reacts with small ring heterocycles such as epoxides and
episulf ides. The strained trans-cyclooctene ring provides an unusual
thermodynamic bias against direct atom transfer, but trans-cyclooctene
oxide still produces substantial amounts of trans-cyclooctene....
Traditional readings of George Bernard Shaw's texts suggest that he is not a pure
Marxist socialist because of the spiritual and nationalist aspects of his vision. This thesis
attempts to confront Shaw's politics in order to demonstrate that he indeed offers a viable
socialist program. Overlaying his socialism with Louis...
Soybeans were grown in hydroponic solutions and in perlite to
devise procedures to measure plant mineral accumulation and
solution depletion over time. Electron emission spectrometry and
micro-Kjeldahl-autoanalyzer analytic techniques were used to
monitor mineral content of individual plants and their corresponding
solutions. An automated computer assisted system of converting
raw...
A simultaneous direct spectrophotometric method for the determination
of barium and strontium using Sulfonazo III has been developed
making use of the chelons EGTA and CDTA at controlled pH
values.
An absorbance study of the barium and strontium complexes of
Sulfonazo III revealed that there is no pH sensitivity of...
A systematic study of the elution of magnesium and calcium from
Dowex 50 X 8 resin using α-hydroxyisobutyric acid (α-HIBA) at
various pH values and concentrations, indicated that the difference in
the equilibrium distribution coefficients of these two elements was
large enough for a good separation. This fact was applied...
A dual -pH simultaneous direct spectrophotometric method for
the determination of calcium and magnesium using Arsenazo III has
been developed.
An absorption spectra study was made of Arsenazo III and its
magnesium, calcium, strontium, and barium complexes at various
pH values. This study showed that total calcium and magnesium
can...
Fermentation of the grape must into wine is one of the most important steps in winemaking. Selected yeast strains of Saccharomyces cerevisiae have been used for many years to ensure complete and even fermentations. The formation of volatile compounds also occurs during fermentation and will influence the sensory perception of...
The effect of soil water suction and soil temperature on rates
of transpiration, photosynthesis, respiration and nitrogen fixation of
soybean (Glycine max. Merrill, var. Chippewa 64) seedlings was
studied. A special apparatus was developed in which the soil water
suction of several cells with soybeans growing in them could be...
Elite milers, Sir Roger Bannister and Joseph Falcon, have stated that the
consumption of carbonated beverages hinders the performance of aerobic
events. Oxygen transport is purportedly impaired by the consumption of
carbonated beverages. The research on carbonated beverages has been
limited to the effects on the digestive system, gastric emptying,...
In the year 2007, the worldwide energy consumption accumulated to a total of 16.5 billion MWh. While the resources of conventional energy production cause environmental damage, renewable energy sources like solar or wind power offer a solution to substitute for coal or nuclear generated power. Countries like Denmark and Spain...
Each chapter in this expository paper considers a mathematical model of an aspect of animal behavior, and how it affects the patterns of movement across and within a landscape. These models are all directly or indirectly related to questions in either Behavioral Ecology or Landscape Ecology, or both. I first...
Potato Virus Y (PVY) is an enduring problem for potato production worldwide. Potato varieties that resist the “ordinary” strain PVYO were developed by breeders, but in recent years, recombinant strains of PVY have been able to circumvent this strain-specific resistance and evade growers and seed certification officials by causing fewer...
In recent decades, watershed managers have increasingly turned to collaborative models of governance for water resource planning in the Western United States. By involving a wide array of stakeholders in decision-making, these place-based partnerships promise many benefits: better understanding of local needs, increased public support, and reduced conflict. Yet, many...
Remote sensing techniques have been applied extensively in geospatial investigations, but their use in measuring soil physical attributes has been far less explored. Soil particle size distributions (PSD) are indispensable in modeling pedological and hydrological processes as well as biodiversity. However, estimation of PSD via gravimetric measurement methods, the standard...
Small, private forestland owners own about 12% of Oregon’s forestland and have the unique ability to implement innovative forest management activities. In southwest Oregon, extreme ecological variability occurs over small spatial scales and requires fine-scale silvicultural treatments that match the precise ecological setting and management objectives of the forests in...
This study examines the interactions between the scientific communities of the
Lawrence Berkeley Laboratory (LBL) and the Stanford Linear Accelerator Center
(SLAC) in the discovery of the tau lepton by physicist Martin Perl between 1973-
1977. Perl became interested in searching for heavy leptons through positron-electron
collision experiments using the...
Sunflower (Helianthus annuus L., cv. NK894) seedlings, grown hydroponically, were exposed to ozone concentrations of 0.0, 0.1, 0.2, and 0.3 ppm at 60% RH, or 0.0
and 0.3 ppm at 30% and 90% RH, for 6 h/d, for four consecutive days, at ages 15 to 18 days from seeding. Plant...
Studies to evaluate resistance in snap beans, Phaseolus vulgaris L. to adult western spotted cucumber beetles, Diabrotica u. undecimpunctata Mann. were conducted in greenhouse cages, field cages, field plots, and in temperature controlled cabinet in the laboratory. Results showed that there were differences in susceptibility to adult feeding injury between...
A field experiment under irrigation was conducted at the
Hyslop Agronomy Farm, near Corvallis, Oregon, during the 1967
growing season to evaluate the effect of barley row spacing, nitrogen
rate and placement, and weed competition in the year of seeding upon
birdsfoot trefoil (Lotus corniculatus L.) seedling establishment.
The effect...
The temperature-dependent development of pupae and adults of strawberry root weevil (SRW) Otiorhynchus ovatus (L.) was studied in strawberry (Fragaria x ananassa Duch. var. 'Totem'). The development of pupae and adults was investigated at constant temperatures from 3-33°C at 3°C intervals. Major emphasis was on the development of a weighted...
The effects of L-ascorbic acid, thiamine HC1, or L-cysteine on
acetaldehyde blood levels and disposition were investigated in acetaldehyde-
treated rats. Rats were treated with ascorbic acid (2
mmoles/kg), thiamine (0.24 mmole/kg), or cysteine (2 mmoles/kg) one
hour before the administration of acetaldehyde (6 mmoles/kg). The
results show that each...
Oregon sweet corn growers face high fertilizer, fuel
and weed control costs; soil compaction, erosion, organic
matter and nutrient depletion; and difficult equipment
operations in muddy fields. An alternative production
system might ease some of these problems.
Testing was begun to evaluate a living-mulch
cropping system for sweet corn (Zea...
Proanthocyanidins (PACs) containing A-type linkages, like those found in cranberry, have been implicated as beneficial phenolic compounds in human health, but much research is still required to better understand their activity fully. One major impediment to progress has been the existence of effective analytical methods for A-type PAC quantification. This...
On a global scale, potato (Solanum tuberosum L.) plays an important role in tackling the threat of food insecurity due to its high yield and broad global acceptance. However, pathogens threaten potato production, causing direct yield loss and rendering potatoes tubers unmarketable. Breeding new cultivars that carry multiple resistances is...
Potato (Solanum tuberosum L.) is one of the most productive and nutritious food crops. Due to its adaptability to cool climates, production in Sri Lanka has been restricted to erosion-prone highlands. Vast potential exists for expansion of potato cultivation in the lowlands while production areas in the highlands are limited...
Triphenylmethyl dye cyanides have been known to be sensitive to ultraviolet radiation since early in this century. Under appropriate conditions, exposure to uv leads to heteropolar fission of the C-CN bond (photoionization) and intense coloration due to dye formation. Thin homogeneous films of hexahydroxyethyl pararosaniline cyanide in a nylon matrix...
Southeast Alaska is located on the traditional territory of the Lingít, Haida, and Tsimshian People. It is comprised of the largest temperate rainforest in the world, with subregions receiving over 500 cm of rain annually. Climate change is predicted to alter the region's timing, type, and magnitude of precipitation and...
A fruit color descriptive study was conducted on 'Max' and 'Sensation' Red Bartlett, 'Columbia' and 'Gebhard' Red Anjou, 'Rogue Red', 'Rosired', 'Red Clapp' and 'Cascade' red pear varieties. A parallel comparative study was done to test differences between related red strains. 'Max' was compared with 'Sensation' in three different growing...
Initial
establishment
of
legume
forage
crops
is
of
prime
importance
in
determining
future
forage
and
seed
production.
The
objective
of
this
study
was
to
determine
the
influence
of
herbicides,
phosphorus
fertilization,
and
seedbed
preparation
on
the
establishment
of
alfalfa
and
birdsfoot
trefoil.
Experiments
were
designed
to
study
the
influence
of...
Volunteer winter wheat (Triticum aestivum 'Daws')
severely suppressed growth of fall-planted alfalfa
(Medicago sativa (L.) 'Vernal') seedlings. Wheat
competition began soon after alfalfa emerged and continued
until the first forage harvest the following May. Alfalfa
yield at the first cutting was reduced by 1% for each day
volunteer wheat was...
Recent developments in the field of clinical echocardiography allow the ultrasonographer to objectively quantify both regional and global myocardial function. Regional deformation (Strain) and deformation rate (Strain Rate) are novel indices of ventricular function that can be estimated non-invasively by ultrasonographic interrogation of the heart. Deformation Imaging (DI)represents a family...
Hand-defoliation was evaluated for its ability to
simulate herbivory by cinnabar moth larvae, Tyria
jacobaeae (L.) (Arctiidae) on the weed tansy ragwort,
Senecio jacobaea L. (Asteraceae). The evaluation was done
on a field population of flowering ragwort, for three
different timings (early, middle, and late season) of
damage.
In the...
Scouringrushes (Equisetum hyemale L.; E. xferrissii Clute; E. laevigatum L.) are ancient perennial seedless vascular plants historically associated with wetlands, low-lying roadsides or field margins with more plant available water. There has been little research conducted on scouringrush species in the context of agricultural production because traditional farming practices confined...
California brome and blue wildrye are important native grass species in the Pacific Northwest. However, both species have been reported to have low emergence under less than favorable field conditions. Seed coating is used to improve emergence and stand establishment of various crops. Three studies were carried out to determine...
Extensive research has been devoted to evaluating potential
genotype-environment interactions. However, plant breeders are still in
need of a simple way to describe how genotypes respond to different
locations and years. In an environmentally diverse state like Oregon,
significant genotype-environment interactions do occur The resulting lack
of association between actual...
Ranchers and resource managers have become concerned about the
role and spread of Cardaria draba (L.) Desv. (whitetop) in the sagebrush
steppe of Northeastern Oregon. This area is an important natural resource
for livestock production and big game winter range.
An area near Keating, Oregon was selected to study the...
Both Leperisinus oregonus and L. californicus are bark beetle
species which emerge from Fraxinus latifolia brood logs as sexually
immature adults and disperse to living ash. Occasional field observations suggest that, for overwintering and maturation feeding, L.
oregonus enter trunks and branches, whereas L.; californicus enter twig
crotches, buds and...
Nine experiments were conducted during 1964 and 1965 to study
the methods of reproduction and mode of spread of sago pondweed
(Potamogeton pectinatus) in irrigation systems.
Frequent treatments of sago pondweed foliage with aromatic
solvent greatly reduced the number of tubers in the substratum of
an irrigation canal. However, complete...
The easy picking characteristic, expressed as low pod detachment force (PDF),
offers a way to decrease pod damage in bush green beans mechanically harvested for
processing and fresh market, and makes hand picking easier and faster. This study was
undertaken to examine inheritance in a cross of two green bean...
Visual selection for grain yield may be a limiting factor in
identifying superior yielding genotypes in a breeding program. This
investigation was conducted (1) to compare the effectiveness of
visual selection for grain yield by three selector groups representing different levels of plant breeding experience, and (2) to
examine the...
Four winter and four spring barley cultivars along with their F₁
hybrids were grown on the Hyslop Agronomy Farm near Corvallis, Oregon,
a high rainfall site (over 1000 mm annually) located in the Willamette
Valley. The experiment consisted of four replications. Ten seeds of
each F₁ and parents were seeded...
Field studies were conducted in 1998 and 1999, to evaluate glyphosate and glufosinate for control of redroot pigweed, common lambsquarters, hairy nightshade, and barnyardgrass in herbicide-resistant sugarbeets. Treatments that included two or three applications of glyphosate, regardless of rate, or glyphosate applied once in combination with BAS 656 07 H...
In a series of greenhouse experiments, isolates representing serotypically
distinct subpopulations of Rhizobium leguminosarum bv. trifolii recovered from root
nodules of field-grown subclover Trifolium subterraneum cv. "Nangeela"), were
evaluated for their symbiotic effectiveness potential, their effect on regrowth
potential of subclover, and for their competitive abilities to form nodules. Isolates...
Three Oregon snap beans were tested for photoperiodic
response on the basis of their overall flowering
patterns. Oregon 1604 and Oregon 4848 showed the same
cumulative flowering curves and percent pod set under
both 11 hour SD and 16 hour LD photoperiods. Under SD,
Oregon 2065 produced a similar flowering...
In recent years, there has been renewed interest in black raspberry (Rubus occidentalis L.) breeding. This has been spurred by an increase in black raspberry consumption due to studies that have shown them to be particularly high in anthocyanin content indicating high levels of antioxidants. Present cultivars are ill adapted...
In the last 30 years, birdsfoot trefoil (Lotus corniculatus L. )
has been recognized as a great potential source of forage. Since the
1930's, many studies have been reported in relation to birdsfoot
trefoil characteristics, including some directly related with the
association between seed yield and its components.
The purpose...
Perennial ryegrass (Lolium perenne L.) is a widely grown cool season, bunch type, short lived perennial grass that is native to Europe, Asia, and North Africa, but has been adapted globally. Perennial ryegrass is quick to establish, has a long growing season, and produces high seed yield and forage or...
Wheat (Triticum aestivum L.) is one of the most important crops in the world supplying about 18.8 percent of the world's caloric energy supply and 20 percent of the world's protein. In the Pacific Northwest (PNW), over one million hectares of wheat are grown every year. Wheat production is typically...
Limited information is available on the effects of applied spring nitrogen (N) and cultivar on winter canola (Brassica napus L.) production in high-rainfall environments. The objectives of this investigation were: (i) to determine the effects of spring N and winter canola cultivars on seed and oil production characteristics, and (ii)...
Hop tissue (Humulus lupulus L.) was grown in vitro in
callus, suspension, and protoplast cultures. Medium
components were evaluated for optimal callus growth.
Solid Murashige and Skoog (MS) medium with picloram at 1.5
uM, 6-benzylaminopurine (BAP) at 10 uM, 1 g/1 casein
hydrolysate, and 100 mg/1 citric acid induced white,...
The diamondback moth (Plutella xylostella L.) is a major
pest of crucifer crops worldwide. It is a particularly
important problem in Southeast Asia where climatic
conditions favor a short generation time and rapid
proliferation. In countries such as Thailand, the
diamondback moth has apparently become resistant to all
classes of...
To remain competitive in the international marketplace,
soft white wheat cultivars grown in the Pacific Northwest
must have consistent and predictable flour properties
including kernel texture. As a consequence, there is a need
to develop wheat cultivars for specific end uses. Wheat
cultivars with very soft kernels are used largely...
Thirty-three genotypes of red fescue were selected on the
basis of diverse origin, anthesis date, and type of spreading from a
space-planted introduction nursery.
Open-pollinated, single-cross, and top-cross progeny
nurseries were established into a randomized block with four replications,
20, 9, 8 entries, respectively, with nine plants per entry
on...
Three experiments whose objectives were to investigate cover
crop kill by winter freeze, weed suppression by 'Micah' barley and
other spring cereals, and allelopathic potential of cereal covers
were conducted at the Vegetable Research Farm and in the greenhouse
and growth chamber facilities at OSU in 1989/90. Kill by winter...
Nitrogen management recommendations for yellow mustard (Sinapis alba L.) production in the high rainfall environment of Oregon's Willamette Valley (WV) are not available. The objectives of this investigation were: (i) to determine the effect of applied nitrogen (N) on seed yield and yield components in yellow mustard, and (ii) to...
Small broomrape, a holoparasitic weed, is a relatively new weed introduction in the Pacific Northwest that has contaminated a limited number of red clover fields in Oregon. Greenhouse and field studies were conducted to evaluate small broomrape response to common crop and weed species in the Pacific Northwest. Host species...
Spike morphology characteristics and the free-threshing habit of wheat have been extensively investigated because of their evolutionary significance and practical importance. Several genetic systems that govern these traits have been reported. Some studies suggest polygenic inheritance while others have identified major genes. This study was conducted to identify and locate...
The chlamydospore is a survival spore produced by 35 of the 75 described species of Phytophthora. Phytophthora ramorum Werres, de Cock & Man in't Veld, the causal agent of Sudden Oak Death (SOD), produces abundant chlamydospores in artificial culture and plant tissue. The chlamydospore is likely the most important survival...
Pharmacokinetics (PK) is the study of the transit of drug into, within and removal from the body to reveal how the body acts on a drug when it is taken. There are four major areas in PK: absorption, distribution, metabolism and elimination. Pharmacokinetics research can be separated into two areas:...
Photosynthetic energy allocation strategies were investigated in the marine diatom, Thalassiosira pseudonana, grown under a wide range of light limitation. Steady-state, continuous cultures were established at three light-limited growth rates. Simultaneous measurements of photosynthetic activity were made that targeted different points in photosynthetic energy flow from gross to net photosynthesis....
The quest to achieve reliable communication has always existed. Error Correcting codes have made communication systems even more reliable under high signal to noise ratios. A new class of codes called Turbo codes have proved to be more effective compared to the other classes of codes and achieve performance close...
In this paper, I present the design of Mira 2, a small-scale, liquid bipropellant rocket engine, with a specific focus on its oxidizer-centered pintle injector. Building upon the valuable lessons and insights gained from the empirical testing of its predecessor, Mira 1, the Mira 2 engine incorporates several improvements and...
The environment has been exposed to a number of hazardous chlorinated
organic compounds. These compounds may be anaerobically biotransformed by
sequential reductive dechlorination reactions in which the chlorine atoms are
replaced with hydrogen atoms. Because reductive dechlorination processes may
occur very slowly in the environment and chlorine position affects the...
With the development of new selective herbicides and the frequent
change in commercial wheat cultivars, information is needed as to the
possible interaction between cultivars and herbicides. The responses
of five genotypically diverse wheat cultivars (Bezostaya, Daws, Maris
Hobbit, Stephens and Yamhill) to diuron [3-(3,4-dichloropheny1)-1,1-
dimethylurea], diclofop methyl 2-[4-(2,4-dichlorophenoxy)phenoxy]
propanoate...
The response of cultivars of winter wheat to foliar applications of urea was examined for grain protein content, yield, and kernel hardness. The objectives of this study were to measure the effect of urea on these three traits in diverse environments and to explain how potential responses could occur by...