Crater Lake, originally barren of fish, was stocked on an
irregular basis from 1888 through 1941 with several species of
salmonids. Two species occur in the lake today--kokanee salmon
(Oncorhynchus nerka) and rainbow trout (Salmo gairdneri). This
study was initiated in the summer of 1986 to evaluate the ecology of...
Rats given morphine-codeine combinations exhibited significantly
increased hotplate reaction times compared with rats given
an analgesic dose of one agent alone. Genera, species, sex, protein
binding and metabolism were studied as possible implicating factors
for the increased reaction times. Both male and female rats exhibited
increased reaction time, and showed...
The effects of L-ascorbic acid, thiamine HC1, or L-cysteine on
acetaldehyde blood levels and disposition were investigated in acetaldehyde-
treated rats. Rats were treated with ascorbic acid (2
mmoles/kg), thiamine (0.24 mmole/kg), or cysteine (2 mmoles/kg) one
hour before the administration of acetaldehyde (6 mmoles/kg). The
results show that each...
Each conference hosted by a NACURH, Inc. affiliated school publishes a conference wrap-up report detailing the conference hosting process and the conference itself. As a resource, these reports are intended for future conference staffs, to share the lessons learned by the last conference staff. They contain pointers to and evaluations...
Thinning of young Douglas-fir forests has the potential to enhance structural diversity and improve habitat for wildlife. I examined the effects of thinning and thinning intensity on abundance and demographic characteristics of forest-floor small mammals in the Coast Range of Oregon 5 and 6 years after thinning had occurred. Thinning...
The complex, dynamic nature of microbial communities in both natural and engineered environments complicates the work of scientists and engineers who wish to channel microbial interactions for societal good. The successful management of these communities towards engineering goals is dependent on developing predictive linkages between community structure and functional outputs....
A digital phase locked loop (DPLL) and a statistical time-to-digital converter (STDC) were previously fabricated in a 0.35µm, 3.3V SOI CMOS process. This work summarizes these designs and characterizes the measured performance. Simulations supplement the measurements where applicable.
The DPLL was found to reach a locked state under a limited...
An aspect of the genetic structure of coastal Oregon steelhead was
explored and found to gradually change in a north to south pattern for the
allelic frequencies of several enzymes. Isocitrate dehydrogenase and
superoxide dehydrogenase were the clearest examples of this pattern of
variation. This pattern was most evident in...
Heterostylum robustum (Osten Sacken) is the principal parasite
of the alkali bee, Nomia melanderi Ckll., one of the most efficient
pollinators of alfalfa in the western United States.
The purpose of the study was to determine the incidence of
parasitism and to investigate the biology of H. robustum.
The fly...