This study was undertaken to ascertain some of the physiological
effects of the herbicide atrazine on Douglas-fir seedlings.
Photosynthetic and respirational rates were measured on seedlings
grown in a controlled environment chamber. Height and dry weight
increases, shoot/root ratios and percent total nitrogen were obtained
from treated and control seedlings...
Individuals with Down syndrome (DS) have less atherosclerosis than others with and without mental retardation (MR). Why individuals with DS do not develop atherosclerosis similarly to others is not known. The insulin resistance syndrome (IRS), a common neuroendocrine disorder underlying cardiovascular disease, has not been investigated in adults with DS...
A photographic band-ratioing technique was investigated.
The data source consisted of 70 mm Landsat Multispectral Scanner
(MSS) negatives. The process would require combining registered
positive and negative transparencies to achieve a ratio
modulation in the resulting print. This would also require
compensation for atmospheric effects on the original negatives by...
This research details the adoption, implementation, and outcomes
of Project C. 0. R. E. (Careers Oriented Relevant Education)
in District #19 junior high schools in Springfield, Oregon. Information
was gathered from teachers, students, and parents associated
with each District #19 junior high school via questionnaires, interviews,
and by field observations....
A possible form of a theory of exploitation of fish populations was examined. The exploitation theory was derived from a theory of community dynamics that represents the interactions between populations in a biological community with complex interrelated systems of isoclines on phase planes. The isocline systems are deduced, with a...
E+A galaxies represent an important niche in galaxy evolution as a subset of post-starburst galaxies. Set apart from other post-starburst galaxies by their rapid quenching of star formation, E+As are thought to have started their formation outside a galaxy cluster's center and have fallen inward due to gravity; the star...
The effects of discharged sewage on physico-chemical conditions
and the distribution and abundance of marine benthic animals were
studied in Shilshole Bay, a part of Puget Sound, off Seattle,
Washington. For over 50 years prior to 1965, when this study was
initiated, 87,300 pounds (32,400 pounds BOD) per day of...
Dredged spoil plumes are monitored during nine hopper dredge
disposal events in 186 foot water depths offshore near Coos Bay,
Oregon. Position and solids volume concentration characteristics of
the plumes are established.
Computer simulations of the monitored events are executed using
the WES modified version of the Koh-Chang instantaneous disposal...
These studies are concerned with the forced motion of a two-degree-of-freedom system consisting of a "flexible beam" supported
by pendulum type hangers.
Using an asymptotic method, an approximate solution to the
nonlinear equations of motion was found. The solution takes the form
of a series in powers of the amplitude...
Sixteen populations of guppies (Poecilia reticulata) were established
in laboratory aquariums. Eight populations were exposed to
dieldrin at a mean concentration of 0.525 ppb in the water and 2.11
ppm in the food, tubificid worms. Eight populations received control
water and food. All populations were fed three grams of tubificid...
I studied spring food habits, focusing on cambium-feeding, of black bears (Ui-gus americanus) in the Central Coast Ranges of Oregon (1987-90) by comparing an area with high levels of timber damage caused by bears (north area) with an adjacent area of low levels of bear damage (south area). I also...
Levels of ⁶⁵Zn in water, sediments, plants, and animals in
Alder Slough, a small ecosystem in the Columbia River Estuary,
were determined periodically during a one year period. Concentrations
of total Zn in organisms were also measured to permit
computation of specific activities (μCi⁶⁵Zn/g total Zn). Temporal
fluctuations in the...
Since the development of the activated sludge process in 1913
many attempts have been made to improve it. One approach has been
to increase the oxygen available to the bio-mass. This study combined the use of elevated pressure and high-shear mixing to increase
the oxygen transfer.
The conventional method of...
Statistical data from breeding experiments suggested that a
reciprocal chromosomal translocation had spontaneously occurred in
a line of S. C. White Leghorn fowl. Approximately 50% of the
embryos from matings between suspected translocation heterozygotes
and normal birds died early during incubation. In an effort
to obtain cytological proof of this...
This study was designed to measure the results on public
school teachers of training in three teaching systems. The results
of the study were intended to provide evidence that might be used
for designing a single system which would bring together the most
effective aspects of each of the systems...
An inelastic scattering experiment was done in which 17-MeV
protons from the Oregon State University cyclotron were scattered
from ¹⁴N
and ¹⁵N gas targets. Angular distributions are shown for
the ground, 6.32-, 7.56-, 8.31-, and 8.57 -MeV states and the 5.3- and
7.2-MeV unresolved doublets of ¹⁵N, and for the...
Since 2003, 39 small earthquakes have been detected offshore central Oregon in the nominally locked part of the Cascadia subduction zone, where very little seis- mic activity has been recorded in spite of a paleo-seismic record of great subduction events. Although the regional earthquake bulletin reports depths of 29 and...
Chromosome complements of ten species of shorebirds, order
Charadriiformes, were analyzed and compared. Mitotic chromosomes
from the pigeon guillemot (Cepphus columba), Heermann's gull (Larus
heermanni), the California gull (L. californicus), the western gull
(L. occidentalis), the American avocet (Recurvirostra americana),
the western willet (Catoptrophorus semipalmatus), Wilson's snipe
(Capella gallinago), the...
The problem of this thesis is the existence of an anomalous manorial landscape in northern Fauquier County, Virginia. The county is about 45 miles southwest of Washington, D. C. The thesis seeks to develop a hypothesis to explain the existence of this landscape so different from surrounding areas in a...
Nine small Mesozoic plutons in TJmatilla County, northeast Oregon, crop out within an area of 58 sq km in the Blue Mountains. The plutons are divided into an earlier series of probable Permian-Triassic age and a later intrusive series of probable Late Jurassic to Middle Cretaceous age. The earlier rocks...
Nine small Mesozoic plutons in TJmatilla County, northeast Oregon, crop out within an area of 58 sq km in the Blue Mountains. The plutons are divided into an earlier series of probable Permian-Triassic age and a later intrusive series of probable Late Jurassic to Middle Cretaceous age. The earlier rocks...
Nine small Mesozoic plutons in TJmatilla County, northeast Oregon, crop out within an area of 58 sq km in the Blue Mountains. The plutons are divided into an earlier series of probable Permian-Triassic age and a later intrusive series of probable Late Jurassic to Middle Cretaceous age. The earlier rocks...
Nine small Mesozoic plutons in TJmatilla County, northeast Oregon, crop out within an area of 58 sq km in the Blue Mountains. The plutons are divided into an earlier series of probable Permian-Triassic age and a later intrusive series of probable Late Jurassic to Middle Cretaceous age. The earlier rocks...
The purpose of the research was to computerize mathematical
procedures for the analysis of range vegetation and environmental
data. The specific objectives were as follows:
1. to develop and apply computer techniques to the classification
of vegetation in order to provide a phytosociological
framework within which to investigate the ecology...
This study attempted to develop a profile of values held by
Oregon's full-time professional staff members as a group. It also
tried to ascertain if there are differences in the values and perceptions
held by sub-groups within the community college staff.
The main questions to be answered were:
1. Are...
Between 1970 and 1974, data were collected on the distribution and biology of the spotted owl (Strix occidentalis) in Oregon. One-hundred and sixteen pairs and seven single birds were located. Spotted owls occurred throughout the mountains of western Oregon and on the east slope of the Cascade Range at least...
Euphausia pacifica lives for a period of approximately one year,
disappearing from the catches at a size of about 22-24 mm. Spawning,
which occurs mainly inshore, extends from June through December
but generally is most prominent in the autumn months.
Average growth is calculated to be approximately 2.0 mm per...
Published April 1971. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog