The work in this thesis involves the development of specimen preparation techniques for the observation with an electron microscope of alpha
particle tracks in cellulose nitrate plastic.
Both direct observation
using thin films and replica production techniques were investigated.
Direct observation of the alpha tracks was accomplished by cutting
thin...
A method of treating resonance captures for few energy group
calculations is developed using the Narrow Resonance-Infinite
Absorber approximation to the resonance integral. The application
of this method is not restricted to this approximation, however,
as other approximations to the resonance integral could also be
used.
The approach presented defines...
Lithia-silica compositions between lithium disilicate and pure
silica were explored theoretically and experimentally, with special
emphasis on structural miscibility. Diffusion couples of vitreous
materials were prepared and annealed. Best success in preparation
was achieved by using electron-bombardment heating in vacuum to
melt the less refractory glass and let it solidify...
Seven sites of uniform topography and soil were selected within
a self perpetuating ponderosa pine forest found on the eastern
flank of the central Oregon Cascades. These plots were located along
a vegetational gradient caused mainly by an orographic rain shadow.
Data gathered included density, frequency, and cover for all...
Spectral analysis was used to investigate semidaily mean sea
levels and atmospheric pressures at San Francisco, California,
Coos Bay, Oregon, and Tofino, British Columbia, in the frequency
band 0 to 0.5 cpd. Cross spectral analysis of semidaily mean sea
levels and atmospheric pressures at the three stations show that the...
In order to examine some possible tyrosyl interactions, poly-tyrosyl lysozyme and poly-O-methyltyrosyl lysozyme were prepared and their solubilities were compared. Both derivatives exhibited
similar pH dependent solubilities, showing a minimum solubility at
about pH 8. Their solubilities varied with temperature, having a
positive enthalpy of solution. The effect of a...
The entire human population is chronically exposed to various
contaminants, including lead and chlorinated hydrocarbon pesticides.
Studies were undertaken to assess the effects of chronic exposure to
lead on the toxicities of two such pesticides, lindane and dieldrin.
Mice were given lead as the acetate in drinking water, at levels...