Eighty-one microbial species isolated from seafoods and other marine sources were examined to determine the extent of interactions among these species. Spot-plates, cross-plates, and concurrent growth experiments at 7, 15, 20, and 30 C indicated that Lactobacillus species were capable of inhibiting other microorganisms. Lactobacillus species isolated from oysters and...
Population development of the symphylan, Scutigerella immaculata
(Newport), was studied in laboratory cultures. Also symphylan
injury to greenhouse plants was investigated. Plastic polyethylene
containers partly filled with damp ground hemlock bark were used to
culture symphylan in the laboratory. Fresh lettuce food was supplied
to the cultures weekly.
Factors which...
In this thesis a system analysis compares power development
plans for the 1980 decade in the Mekong countries i.e. Laos, Thailand
Cambodia, and South Vietnam. Given the decision to invest in power
development, an economic evaluation is made of complete system
developments rather than just hydro or thermal plants. The...
An experiment was conducted during the period November 1967
to November 1968 at Oregon State University (OSU) and the Umatilla
Branch Experiment Station (BES) at Hermiston, two trials at each
location, to answer several questions: (1) could comparable rations
for swine be formulated by a computer on a least-cost basis;...
A combination of genetical and biochemical methods were
utilized in investigating house fly resistance to naphthalene. The
inheritance of resistance was determined by crossing a naphthalene
resistant strain of Musca domestica L. with a susceptible mutant
marker strain. Biochemical comparisons were made on substrains
isolated from the progeny of these...
The object of the present study was to investigate the stimulatory
or inhibitory effects of barium, boron, bromine, cadmium,
chromium, cobalt, copper, fluorine, iodine, iron, manganese,
molybdenum, nickel, rubidium, selenium, strontium, vanadium, and
zinc upon in vitro rumen microbial activity as measured by the amount
of cellulose digested. Washed suspensions...
Herbicides were tested for the selective control of bentgrass in
Kentucky bluegrass turf under three levels of competition. Best control
in zero competition was obtained with a winter treatment of
bromacil at two pounds per acre. Under circumferential and direct
competition, best control was obtained with a summer and fall...
A study of the effect of mixing on the oxygen uptake rate of
estuarine bottom deposits is presented. The method of study involved
the mixing of samples of bottom deposits with the overlying water to
result in concentrations of suspended matter in the same order as
observed in the estuary....
The cabbage flea beetle, Phyllotreta cruciferae (Coleoptera:
Chrysomelidae) was introduced into the United States from Europe
during the 1920's and 1930's. It was described as a new species,
P. columbiana, native to North America by F. H. Chittenden in 1927.
This synonymic situation was discovered in 1953 after P. cruciferae...
The purpose of this study was designed to answer
1. What are the beliefs and attitudes that Oregon home economics
teachers hold about various new trends?
2. Are Oregon home economics teachers willing to support the
various new trends?
3. Are Oregon home economics teachers willing to further prepare
themselves...
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 three-phase squirrel-cage induction motor is rugged, compact,
inexpensive, can be totally enclosed and requires little maintenance.
Its use as a variable speed drive has been limited, however, by the
state-of-the art of control components.
The advent and continuing development of the silicon controlled
rectifier and associated solid-state components has...
The black crappie was evaluated as a pond fish in four experimental
ponds in the Willamette Valley. Two ponds were stocked with
largemouth bass, bluegill sunfish, and black crappie (1:9:3), and
two ponds with largemouth bass and black crappie (1:3).
Total biomass was greatest in the three-species ponds (80 kg/...
The purpose of this study was to explore the housing expenditures
and factors in, housing selection and satisfaction of single
adults. The population tested was guests and members of two single
Catholic adult clubs in Portland, Oregon. Questionnaires designed
for collecting the data for the study were mailed to the...
The integumental histology of Taricha granulosa (Skilton) has
been investigated with special attention being given to the seasonal
variations associated with terrestrial and aquatic habitats.
The epidermis consists of a stratified squamous epithelium,
four to seven cell layers thick, with one to two layers being cornified.
The dermis is composed...
During the summer of 1967 a fertilizer survey was conducted
to determine the nutrient status of peppermint fields, the nutrient
concentration of plant tissue and the oil content of peppermint in
Oregon.
Plant and soil samples and the field's fertilizer history
were collected from cooperators in
Oregon's peppermint growing
areas...
The use of petroleum oil prevented, to varying degrees: the
transmission of three stylet-borne viruses in three different crops.
The use of oils resulted in a marked improvement in the number of
lily bulbs harvested from treated plots as compared to the number of
lily bulbs harvested from untreated plots....
At the time of this study 19 states have entered into agreements, one state agreement is pending and one state has submitted its proposal for entering into an agreement with the Atomic Energy Commission for the purpose of assuming regulatory authority over (1) byproduct, (2) source and (3) special nuclear...