Virus contamination in a potato breeding program can seriously
disrupt the variety development process. Experiments were conducted
from 1989 through 1993 to: evaluate the extent to which Potato
Leafroll Virus (PLRV) and Potato Virus Y (PVY) can invade a breeding
program, determine viral spread within hills and within individual
tubers,...
Twenty-three bottom-trawl fish assemblages were identified from the relative biomass of
33 dominant species that occurred in the National Marine Fisheries Services' triennial
trawl surveys over the continental shelf and upper slope off California, Oregon, and
Washington from 1977 to 1992. The assemblages accounted for about 70% of the total...
There is a widespread problem with looting and vandalism of cultural resources in the Pacific Northwest. To combat this problem law enforcement must have the assistance of the archaeological community. To be able to assist law enforcement, archaeologists and cultural resource specialists must have the proper training in cultural resource...
A methodology for improving quality and reducing life cycle
costs of mechanical systems is described. The principal concept is
that a system can be designed, in the conceptual stages, to be easier to
diagnose for failures. To perform this, functional decomposition and
form to function mapping are utilized both as...
The immune system has been identified as a very sensitive target for the toxic effects of 2,3,7,S-tetrachlorodibenzo-p-dioxin (TCDD). Exposure to TCDD has been shown to disrupt the generation of both cell-mediated and humoral T cell-dependent immunity in laboratory animals; however, the mechanism remains unknown. In this dissertation, the hypothesis is...
The purpose of this document is to summarize the best scientific information presently available for bull trout (Salvelimus confluentus) throughout Oregon and to review their historical and current status. What started out as a relatively simple exercise to review and update the status report by Ratliff and Howell (1992) based...
Although the Escherichia coli host has almost all of the enzymes necessary to
synthesize nucleotides needed for bacteriophage T4 DNA replication, phage genes
expressed early in infection encode enzymes for de novo DNA precursor biosynthesis
and salvage from degraded host DNA. Eight early enzymes and two host enzymes
comprise the...