The spermiogenesis of Mytilus edulis (a marine mussel) has
been studied, employing techniques of light and electron microscopy
and cytochemical preparations. The observations trace the development
of the acrosomal complex, the nucleus, the mitochondrial
middle-piece, and the flagellum.
In early spermatids numerous membrane-bounded proacrosomal
vesicles arise from several Golgi complexes...
Rhabdocoels of the genus Paravortex are parasites of marine
molluscs. The bent-nosed clams, Macoma nasuta(Conrad, 1837) of
Yaquina Bay, Lincoln County, Oregon are commonly infected with a new
species of Paravortex. The morphology of the adult worm has been
described and it has been compared to the other three species...
Recent investigations indicate that several latent viruses of
apples exist in common commercial apple stocks, but these viruses
and their relationships are incompletely understood. This thesis
describes investigations of crab apples as indicators of latent viruses
of apples.
Eighty-eight varieties and species of crab apples were tested
as indicators of...
The mound-building harvester ant, Pogonmyrmex owyheei Cole,
(formerly included in the species occidentals) is widely distributed
on the semi-arid rangeland east of the Cascade mountains in Oregon.
Because of its seed foraging and vegetation clearing habits, this ant
has been considered as a possible competitor with livestock and
wildlife for...
The impact of the electronic computer on the teaching
of mathematics, science, and engineering has created
the need for a relatively low cost instructional digital
computer. SPEDTAC (stored Program Educational Digital
Transistorized Automatic Computer) was designed specifically
to fulfill this need.
The prototype described is a serial, solid state,
single...
Tissue obtained by punch biopsy from the antebrachial organ of
Lemur catta has been studied with the electron microscope. This study
describes the fine structure of the interstitial cells found between
apocrine sweat glands in the antebrachial organ. These large polygonal
cells are of three types: light cells, dark cells,...
This report is one of a series issued in cooperation with the ANC-17 Panel on Plastics for Aircraft of the Departments of the Air Force, Navy, and Commerce. Information reviewed and reaffirmed 1960. Original report issued September 1955.
Fall Creek Reservoir is a unit of the comprehensive plan of the U. S. Army Corps of Engineers for flood control and multiple use of the water resources of the upper Willamette Basin. The reservoir is located on Big Fall Creek, nineteen miles southeast of Eugene in Lane County...Undesirable fish...
This paper describes a study of two-phase gas-liquid vertical
annular climbing film flow. Using a high speed Fastax movie camera,
motion was slowed sufficiently to facilitate detailed analysis of the
climbing film structure, based on single frame projections. The
dynamic characteristics of the liquid film could likewise be obtained,
though...
In freshwater the crayfish, Pacifasticus leniusculus, maintains
sodium balance by absorbing sodium against a large concentration
gradient. The site of uptake is the gills. The rate of uptake is
regulated and can be increased by depleting the animals of sodium
Neither the mechanism of sodium transport or the regulatory mechanism...
This thesis discusses the design of an approximate matched
filter capable of detecting a 30 MHz, 0.45 microsecond pulsed carrier
in white noise. The theoretical background, which the matched filter
is based upon, is presented. The matched filter described herein is
composed of an open-end lumped-parameter delay line and a...
The exponential family of probability distributions is obtained
from σ-finite measures on the real line. We choose the parameter
space to be one-dimensional and the exponent to be linear. Relationships
between the measure, its spectrum, and the parameter space
are examined, moments of the exponential family are studied, and
the...
An evaluation of the meteorological usefulness of a maser RF
amplifier on an AN/MPS-34 X-band weather radar indicates that there
are both advantages and disadvantages to its use. The problems
associated with the maser used in this study included tuning problems,
loss of gain through loss of liquid helium and...
"The purpose of this report is to discuss the general status of the Dungeness crab fishery in Oregon, to present the information available concerning the opening date of the 1964 season, and to inform the commission as to the merits of some regulation changes being considered by the staff." (p.1)...
"The first year of the project was devoted to developing laboratory spawning and larval rearing techniques for Pacific Coast clams and oysters. The objectives of the past year were to: (1) refine these spawning and rearing techniques to achieve higher larval survival to the adult form and (2) initiate growth...
Seven cases of post-cold-frontal squall lines moving
through the Willamette Valley of Northwest Oregon were
investigated by the various techniques of meso-analysis.
Time cross sections were converted to space cross
sections by using the movement of the radar echo of the
squall lines. The observations in time were converted to...
All possible single crosses from three different maturity
groups of 27 selected parental genotypes of tall fescue were established
in a randomized block experiment to be evaluated in 1962 for
five agronomic characters: height, width and maturity per plant;
self -seed yield per plant; and forage yield per plant. For...
The thesis was an investigation into the mechanism of precipitation
from solid solution in an Aluminum-0.7% Magnesium-0.6%
Silicon alloy containing iron impurities. Laue x-ray diffraction patterns
were obtained from solution heat treated and aged single crystal
specimens in various crystallographic orientations. Precipitation
related streaking was detected on some of the...
A technique is presented for obtaining high resolution root locus plots and Bode diagrams. This is done by translating the origin of coordinates to the area of interest by an appropriate change of variable. The method is applicable to hand calculations or use of a potential analog computer. Examples include...
This report is one of a series issued in cooperation with the ANC-17 Panel on Plastics for Aircraft of the Departments of the Air Force, Navy, and Commerce. Information reviewed and reaffirmed 1960. Original report issued October 1955.
Growth and replacement patterns of four successionally important
species occurring on Douglas fir clear-cuts were investigated
from September 1964 to June 1967. The study was carried out
on the Marys Peak watershed located near Corvallis, Oregon.
Species used in the study include Holcus lanatus, Senecio
jacobaea, Lotus crassifolius var. subglaber,...
As indicated by the title, this thesis generalizes the Main Inertia
Theorem of Ostrowski and Schneider [8]. The first three results
concern the formation of a polynomial function f(A, A*, H) so that
the existence of an hermitian H for which f(A, A*, H) is positive
definite is a necessary...
Published December 1967. Reprinted August 1979. 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
The effect of competition on the brood survival of the Douglas fir
beetle Dendroctonus pseudotsugae Hopkins, in down or windthrown
Douglas-fir Pseudotsuga menziesii (Mirb.) Franco was studied in the
field and the laboratory. The investigation of the role of competition
in the population dynamics of the beetle had four objectives:...
Permeability, effects of age, and water table fluctuations were
studied for nine drainfields in five soil types ranging from well to
poorly drained. Three sites were in Willamette, one in Woodburn,
two in Amity, two in Concord, and one in Dayton soils. Before
permeability of drainfields could be evaluated, methods...
The purpose of this study was to determine the proanthocyanidin
content of bananas at the green, the ripe,
and the overripe stages. Three bananas from each of three
hands at each stage of ripeness, making a total of 27
bananas, were freeze-dried. The ground tissue was dispersed
in methanol and...
A summary of the first. year's results in a program of current measuring techniques employing the electromagnetic method is presented. The data was taken on hydrographic survey cruises ranging to 165 miles offshore from Oregon. The measurements in this first phase consist solely of those taken by the method of...
Objectives of this investigation were two-fold: (l) to determine
crested wheatgrass production on selected range sites and (2)
to evaluate present and potential production on public and private
lands in the study area. Field studies were carried out in 1953 and
1964 near Jordan Valley, Malheur County, Oregon, on the...
Growth chamber and field experiments were conducted to investigate
the effects of different temperature levels and durations on
floral induction and vegetative growth in orchardgrass. Propagules
of two clones, XLI-8 (clone R) and MID-5 (clone 0), from the synthetic
variety Pennlate, were used in all experiments.
Clone R plants were...
A fluorescent dye, 1-dimethylaminonaphthalene-5-sulfonyl
chloride (dansyl chloride), was covalently bonded to polylysine. The
dansyl tagged polylysine was complexed to DNA by gradient dialysis.
The polarization and intensity of fluorescence of the dansyl and the
turbidity of the complex were measured as a function of salt concentration
for a variety of...
A qualitative evaluation was made of the adherence between
borosilicate glass and the ceramics, steatite and alumina. Three
basic adherence studies were performed.
(1) A comparison between the x-ray diffraction patterns of
the ceramic and the fused glass-ceramic powder mixture was made
to determine if any new compounds were formed...
This report covers a 3-year period. It includes a growth survey of gaper clams to establish normal growth patterns, a summary of a transplantation of softshell clams into Siuslaw Bay, and the results of crab tagging to determine movement/migration patterns. This report also has research on personal-use fisheries for razor...
The Tenmile Lakes Project for partial control of warm-water fish was initiated in August of 1964, One qualified fishery biologist and one conservation aide were assigned to do the work. The reduction in assigned personnel was due to lack of funds. Although this was to be a joint project with...
Waste water lagoons have been used as a satisfactory means of
treating domestic and certain industrial wastes in many parts of the
country. Many of the parameters that govern the applicability of this
type of treatment process are climatic in nature, and critical evaluation
of local climatic conditions, as well...
A mechanism is a constrained kinematic chain composed of
gears, links, cams, or the like. Mechanisms are the building blocks
of all machines, and, as such, their evaluation is of considerable
importance to the mechanical designer. Because the mathematical
analyses of systems with four or more moving members has been...
A numerical model was developed which predicts the dynamic
response of a single mooring line and a buoy of forty feet diameter
to sinusoidal waves, wind and current in all deep waters. All forces
and reactions were considered to be in one plane.
The basic equations for the mooring line...
The effects of mechanical damage, insect infestation and
storage conditions on seed viability of spring wheat were studied by
three known tests, laboratory germination, greenhouse growth, and
tetrazolium staining, so that the relationship of these tests could be
discerned to facilitate seed testing work.
Mechanical damage was induced by threshing,...
A design for an agricultural airplane is developed and evaluated,
A biplane configuration was adopted since it provides better maneuverability
and stall characteristics than a monoplane of comparable
size and design simplicity. The airplane, powered by a 600-horse-power
Pratt Whitney radial engine, was sized to carry a useful
load of...
This paper presents a theoretical study of real-time bandwidth
compression systems using the Hilbert transform and associated analytic
signal concept. An analytic signal is defined as
u(t) = s(t) + [superscript ¯]js(t) , where [superscript ¯]s(t) is the Hilbert transform of the signal
s(t). A complete discussion of the properties...
The 4s³P₁ state of argon decays radiatively by a resonance
transition to the 3p⁶¹S₀ ground state; the wavelength of this radiation
is 1067A. By direct observation of the decay of the 1067A radiation
from excited argon gas, a value of 0.93±0.06 x 10⁻⁵ seconds
has been obtained for the natural...