Populations of breeding birds and forest composition and structure were examined in preconimercially thinned and unthinned ponderosa pine (Pinus ponderosa Laws.) stands in east-central Washington. Stands were composed of predominantly ponderosa pine with a multi-aged structure made up of small even-aged clumps. Thinning reduced the
density and foliage volume of...
Rhodococcus fascians is a Gram-positive, pleiomorphic actinomycete that causes leafy gall formation in a wide range of plant hosts. This particular phytopathogen has been a focus of research at the Oregon State University Plant Clinic, a diagnostic laboratory. Phylogeny of R. fascians isolates obtained from Plant Clinic submissions was determined...
Dutch elm disease (DED) is a disease of elm trees caused by three species of Ascomycota fungi: Ophiostoma ulmi, Ophiostoma novo-ulmi, and Ophiostoma himal-ulmi. There are also two subspecies of O. novo-ulmi: subsp. americana and subsp. novo-ulmi. The pathogen is spread by bark beetles, which inhabit and traverse different elms....
This thesis is a study of the effects of social media and the influence it has over people and their wellbeing. The study within the thesis manipulates the social media habits of Oregon State students, and looks at the changes in their wellbeing. Throughout the background research the evidence supports...
Recent years have been marked with increasing rates of corporate scandals, environmental disasters, and unfair labor practices, drawing attention to the importance of corporate social responsibility (CSR). Despite increasing efforts in CSR, past research has shown increased levels of mistrust and skepticism from consumers towards business. Furthermore, the very issues...
The use of data extracted from particle image velocimetry (PIV) along with vector and tensor visualization techniques provides a valuable tool for understanding a complex flow field. By studying a simple geometric structure such as a cylinder under a simple transient waveform, fundamental mechanisms of wake development under solitary wave...
The purpose of this study was to identify the factors that influence
the use and understanding of unit pricing. Furthermore, a
comparison between a city with a mandated unit pricing program
(Seattle, Washington) and a city with a voluntary unit pricing program
(Portland, Oregon) was made. The intent was to...
Several experiments were conducted to investigate the effect of
dietary factors such as amino acids, B vitamins, butylated hydroxyanisole
(BHA) and phenobarbital on pyrrolizidine alkaloid toxicosis
in rats and horses. The influence of St. John's wort, bracken,
comfrey, and alfalfa on tansy ragwort toxicity was also examined.
Effects of dietary...
The performance of a multiple stage crosscurrent tower packed
with Pall rings was characterized with and without a recycle loop on
the gas stream. The column used 12 baffles. The absorption system
studied was the transfer of oxygen from an oxygen-enriched air stream
into a water stream which is a...
