Uranium is naturally radioactive and commonly found in water, soil, and rock. It can occur in elevated concentrations due to the presence of ore bearing bodies and be concentrated through human activities. This research focuses on uranium uptake for Capsicum annuum for three growing conditions. These include a set of...
Full Text:
Conditions
by
Jenelle E. Parson
A THESIS
Submitted to
Oregon State University
University
Hummingbirds are among the smallest birds in the world, only 3 to
4 inches long and about 1⁄10 ounce. They may be small, but these beautiful birds are easy to see and fun to watch.
Hummingbirds feed on nectar and small insects. They get most of their water from nectar.
Did you know that the American kestrel is the smallest falcon in
North America and the second smallest falcon in the world? The average
length of the American kestrel is 9 to 12 inches, about the size of a robin.
Composition scholars who have written about trauma have typically focused on creating classrooms that are conducive to healing and learning. In doing this work, however, they have considered neither how PTSD nor other people’s responses to it can impact one’s perceived rhetoricity in the college classroom. In other words, they...
Engineered capillary barriers typically consist of two layers of granular materials designed so that the contrast in sediment hydrologic properties and sloping interface retains infiltrating water in the upper layer. We report here on the results of two bench-top capillary barrier experiments, and associated modeling. These experiments were conducted to...
Biosphere models predict the transport of radionuclides in the environment with an end goal of assessing the possible risk to humans. Little data exists to support these mathematical biosphere models. The objectives of this work were to verify foliar uptake in biosphere models using experimental data, compare existing biosphere models...
The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) times periodic signals from pulsars as a method of detecting gravitational waves. NANOGrav detects waves emitted in the nanohertz frequency range, a range lower than those previously explored by other organizations. This allows for the study of rarely observed sources such...
The usefulness of preplant nitrogen (N) in establishing
alfalfa in colder production areas has not been
well characterized. This study was conducted to determine
the effect of preplant N and soil temperature on
yield, percent N derived from biological nitrogen fixation
(PBNF), and shoot N concentration in alfalfa (Medicago
sativa...
Understanding the transport and retention of radionuclides in the environment is important for protecting freshwater supplies and minimizing impact to biologic systems. Technetium-99 (Tc⁹⁹) is a radionuclide of interest due to its long half-life (2.13 x 10⁵ years) and toxicity. In the form of pertechnetate (TcO₄⁻), Tc is expected to...
Waterborne fecal contamination poses serious risks to human health and can disrupt aquatic ecosystems. Molecular marker methods are widely used to identify and, in some cases, quantify the sources of contamination and guide management decisions regarding water resource protection. However, methods to detect some likely sources of fecal contamination such...