Quaking aspen (Populus tremuloides) is one of a few iconic trees that symbolize the spirit of the West. Though sparsely distributed throughout Oregon, aspen is an important species, providing a long history of benefits to both people and wildlife. “Quakies,” as many call aspen, are well liked by ranchers, hunters,...
An instrument was constructed to measure molecular fluorescence (FL) or chemiluminescence (CL) and absorbance (ABS) simultaneously. The lower, middle, and upper portions of the test solution are probed to obtain ABS, FL, and CL data. Optical fibers are used extensively. The ABS and FL or CL spectra are acquired in...
Quaking aspen (Populus tremuloides) is one of a few iconic trees that symbolize the spirit of the West. Though sparsely distributed throughout Oregon, aspen is an important species, providing a long history of benefits to both people and wildlife. “Quakies,” as many call aspen, are well liked by ranchers, hunters,...
The role of the high density lipoprotein (HDL) molecule is currently an area of great interest within the scientific community. Previously, mouse and human studies have demonstrated an inverse association between HDL cholesterol (HDL-C) levels and cardiovascular disease. Recent clinical trials, which increased HDL-C, have failed to reduce the number...
Genetic factors such as decreased genetic
diversity and increased homozygosity can have detrimental
effects on rare species, and may ultimately limit potential
adaptation and exacerbate population declines. The Gulf
and Atlantic Coastal Plain physiographic region has the
second highest level of endemism in the continental USA,
but habitat fragmentation and...
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At the intersection of higher education and politics, there is demand for an easily understood measure of student success. Graduation rate is the current measure of choice, but the definition of graduation rate excludes many categories of students and types of success particularly applicable to community colleges. The purpose of...
Premise of research. We sought to determine the role of flowering in recovery of understory herbs from a major disturbance and to determine the effects of plant and environmental factors on flowering patterns.
Methodology. We counted flowering and nonflowering shoots in permanent plots eight to 10 times over a 30-year period for...
In order to observe laser phase noise, this noise must be converted to
amplitude noise, which can be achieved using either an interferometer or an
absorption resonance in an atomic/molecular vapor or gas. When phase noise is
converted to amplitude noise, it is manifested as a heterodyne signal in the...