The food consumption and growth of Pacific oyster larvae were studied in three experiments making use of a constant flow apparatus. The apparatus maintained a continuous flow of various densities of
algae through test chambers containing different numbers of larvae in a factorial design. Three additional experiments were conducted in...
This was a two part study to develop self-instructional material to meet the needs of students and teachers in an individualized clothing construction program.
First, two self-instructional kits were prepared, called Skills of Sewing Kits (SoS Kits), to teach stay-stitching and a lapped zipper application. Each kit contained guidelines for...
The bark beetle Dendroctonus ponderosae Hopkins (Coleoptera:
Scolytidae) has caused severe mortality in recent decades to young
stands of ponderosa pine in the western United States. Insect parasites
and predators, believed to be of importance in the population
dynamics of the beetle, were the subject of the thesis research, conducted...
The biomass and the composition of 15 stands of red alder (Alnus rubra Bong.) on river bottom sites in western Oregon was measured during August and early September, 1969. These stands ranged in age from two to 64 years. Biomass was found to vary from 134 k/ha (kilograms per hectare)...
The purpose of this study was to determine if infection levels of dwarf mistletoe on ponderosa pine could be detected with color aerial photography. The photography was taken in early September using Kodak Ektachrome Infrared Aero and Ektachrome Aero films at scales of 1/4000, 1/2000, and 1/1000. Ground truth consisted...
This study attempts to show that competitive advantage alone does not determine the directions of trade in kraft liner. Trade depends on comparative advantage and especially on familiarity with foreign demand. Implications from international trade theories guided this study of trade in kraft liner. Future demand in the E.E.C. for...
The acoustic signals produced by the Dungeness crab (Cancer
magister) were investigated. The signals were examined for duration times and frequency content. The signals were converted from analog to digital form, and the autocorrelation functions and the power density spectrums were determined.
The signals produced by Dungeness and Japanese red...
A decreasing rate of flow was observed (after sufficient air and particulate matter were removed from the wood and water) under steady-state conditions for green western hemlock sapwood. The decrease is theorized to be due to viscoelastic behavior of pit membranes. An unsteady-state procedure for determining longitudinal liquid permeability of...
Bigleaf maple chips were pulped by the kraft, Magnetite, neutral sulfite semichemical, and refiner groundwood processes. Pulp from each process was refined in a Valley Beater and the handsheet properties of the refined pulp were compared to similar pulps made from other wood species. For the kraft process a different...
A study of the effects of stabilized and unstabilized kraft mill effluents on the production of chinook salmon (Oncorhynchus tshawytscha) in six laboratory streams was conducted at the Pacific Cooperative Water Pollution Laboratories, Oregon State University-from May through August, 1969. Similar salmon biomasses were stocked in each stream. Changes in...