An analysis of the velocity and the shape of large gas bubbles
rising through tubes filled with viscous liquids is presented. Four
tubes, with diameters ranging from 0. 446 inches to 3. 97 inches, and
three liquids, with viscosities ranging from one to 200 centipoise,
were used in the study....
Recent conflicts in America concerning the environment (the harvesting of old growth timber in the Pacific Northwest, or the proposed opening of public lands in southern Utah to mining interests, for instance) have precipitated a personal examination of "historical others" (Jensen 64), individuals that possess very different sensibilities from a...
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...
Coreplication experiments have revealed that replication of
turnip yellow mosaic virus (TYMV) RNA in turnip protoplasts is cis-preferential.
Genomes encoding mutant p141 or p66, proteins
essential for virus replication, were inefficiently rescued by a
helper genome. One model for the cis-preferential replication of
TYMV is that p66 and p141 form...
The distribution of barite (BaSO₄) in marine sediments has long been studied as a proxy for paleoproductivity. While pure barite is known to be a stable mineral in oxic sediments, it is also known that variations in the Sr/Ba ratio influence its solubility and liability during early diagenesis. To extract...
This study investigated the opinions of bicyclists/pedestrians
regarding how safe from a bicycle traffic injury they felt while on
campus. Most earlier studies had been concerned with the taxonomy
of bicycle/pedestrian accidents. Because of the paucity of
research on attitudes of bicyclists and pedestrians, this research
was undertaken.
The survey...
Carter Lake, a freshwater, coastal dune-margin lake,
was sampled at the beginning and end of the summer of 1986
to determine the sediment characteristics and benthic
macroinvertebrate abundance, biomass, variety, and
diversity. The distributions of major benthic habitats were
estimated by snorkeling in June and July, 1986. Water
temperature and...
Meadowfoam (Limnanthes R. Br. spp.), a source of C₂₀
and C₂₂ fatty acids, is a new industrial oilseed crop
adapted to the Willamette Valley of Oregon. Increased oil
yield per land area may increase the rate of meadowfoam
commercialization. Using two half-sib L. floccosa x L.
alba lines, 85-765 and...
This research focused on features of a genetically
isolated population of cutthroat trout (Oncorhynchus clarki)
in the Triangle Lake basin of coastal Oregon. A falls at
the outlet of Triangle Lake has blocked upstream migration
of trout and anadromous salmonids into the basin. Cutthroat
trout were found throughout the six...
Inconsistent seed yields of meadowfoam (Limnanthes alba Benth.) interfere with profitable production of this new oilseed crop. Significant correlation of field grown meadowfoam seed yields with years having temperatures above 24°C in mid-May at Corvallis, OR., led to the hypothesis that ambient temperature during reproductive development affects meadowfoam seed yields....