Three Oregon soil types (Chehalis silt loam (CSL), an alluvial
soil from the Willamette Valley; Ayre sandy loam (ASL), a volcanic
pumice soil from the Central high desert; and Klamath fine sandy
loam (KFSL), a basaltic mineral soil from the Klamath Basin) were
collected adjacent to fields which had been...
A procedure is described for the optimization of a previously
described continuous analysis adaptation of the Pearl-Benson or
nitroso method for estimation of spent sulfite liquor (SSL) or ligno-sulfonates.
The optimized procedure has a response time of 6.5 minutes. In order to monitor samples whose SSL concentration is
between 0...
This study investigated several physiological aspects of the
water economy of the Sage Sparrow, Amphispiza belli nevadensis,as
they relate to the ability of this species to inhabit xeric desert environments.
When maintained in captivity on a dry diet without
drinking water, Sage Sparrows gradually lost weight and died. During the...
This paper develops an equation, from an heuristic set of assumptions,
which describes the axial current, leakage current, resultant
electric field, and resultant earth potential occurring when
a pipeline buried within a resistive earth is subjected to a distributed,
primary, axial, electrostatic field produced from a high-voltage, direct-current (HVDC) power...
Previous work has shown that diuron (3-(3, 4- dichlorophenyl)-1,
1-dimethylurea) is less toxic to fall-planted wheat than to wheat
planted in the spring. Diuron has been a significant factor in increasing
yields of winter wheat grown in Oregon's Willamette Valley.
The influence of several selected environmental factors on diuron
toxicity...
The individual stocks of sockeye salmon that make up the
annual spawning migration to the Bristol Bay region of Western
Alaska are produced in the lakes and streams of ten major river
systems, which discharge into the bay over a shoreline distance of
120 miles. The hypothesis adopted in this...
Maturation rates of monogerm sugar beet seed grown in Western
Oregon were measured quantitatively to determine attainment of maximum
seed development and germination. Seed was collected at various
intervals after anthesis from two hybrid varieties representing the
extremes in resistance (hard bolting) and susceptibility (easy bolting)
to seedstalk development. The...
The fungus Phoma menthae Strasser causes black lesions and
cankers on stems and rhizomes of Mentha piperita L. The purpose
of this thesis was to: 1) study the production of polygalacturonase
(PG) and macerating enzymes (ME) by P. menthae in vivo and in
vitro, 2) study the effects of phenolic...
Purpose of the Study
The purpose of this study was to measure, by the analysis of
statistical and subjective data, the effects of work experience programs
on disadvantaged ninth grade students.
The study involved one major hypothesis: the introduction of
work experience, as part of the ninth grade curriculum, for...
This investigation was designed to study articulation between
Oregon secondary mathematics programs and college mathematics at
Oregon State University. Three main facets of the problem were
studied:
1. The relationship of several factors to the CEEB Level I
Mathematics Achievement Test score.
2. The feasibility of a discriminant function as...
The concentrations of iodophor necessary to reduce the activity
of several metabolic enzyme systems 50 percent was used as the
basic approach in attempts to elucidate the mechanism of germicidal
action of iodine. For comparisons, a chlorine-releasing germicide
(Trichlorocide) and a quaternary ammonium compound were also
tested. It was found...
The purpose of this thesis is to construct several stochastic
process models for combined statistical dynamic prediction of the
500-millibar pressure surface for the northern hemisphere. To
achieve this, a random forcing function is added to the spectral form
of the nondivergent vorticity equation. Three models, one linear and
two...
A mathematical model simulating mass transport of chemicals
in saturated porous medium is given in four parts. Included in the
development is the physical phenomenon of adsorption of molecules
of chemicals on the surrounding walls of the porous medium. The
four main areas of study are:
(1) Simple one dimensional...
The effect of a time harmonic electric source ring placed
axially symmetric between the walls of a double conical structure of
finite slant height is investigated. The bases of the conical structures
are spherical caps of radii equal to the slant height.
The Green's function for ideally conducting walls is...