Index Catalog // ScholarsArchive@OSU

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

Creator:: Dossa, Ekw'e Lokossou, 1960-
Abstract:: Two native shrub species (Piliostigma reticulatum and Guiera senegalensis) are prominent vegetation components in farmers’ fields in Senegal. However, their role in nutrient cycling and ecosystem function has largely been overlooked. A study including both laboratory and field experiments was conducted to evaluate potential biophysical interactions of the two shrub...
Resource Type:: Dissertation
Full Text:: . Shrubs differed in their ability to modify soil properties. G. senegalensis had higher soil C and N

Spatial and Temporal Variability of Heavy Metals (Lead, Copper, and Zinc) in Stormwater, Moss, and Street Dust in Portland, OR

Creator:: Bauer, Sophia O. A.
Abstract:: Lead (Pb), copper (Cu), and zinc (Zn) are known to have detrimental effects on aquatic and terrestrial ecosystems, and to human health both in rural and urban areas. Heavy metal contamination enters stormwater by atmospheric deposition and by the collection of surface particles during overland flow. Stormwater runoff in urban...
Resource Type:: Masters Thesis

Groundwater arsenic concentrations and cancer incidence rates : a regional comparison in Oregon

Creator:: Fleming, Harmony S.
Abstract:: Arsenic contamination of groundwater is a global issue with national and local implications. Chronic exposure to arsenic in drinking water has been linked to both carcinogenic and non-carcinogenic health outcomes. The primary exposure route of inorganic arsenic is ingestion from drinking water due to natural contamination in groundwater from dissolution...
Resource Type:: Masters Thesis
Full Text:: secondary data have produced some unexpected results. Using the arsenic Quintile 1 (0 - 0.9 μg/L) as a

Estimating a juniper biomass supply from private rangelands : the impact of distance and biotic factors on costs

Creator:: McCaulou, Jeff C.
Abstract:: Central Oregon has attracted attention as a potential location for a biomass industry based on a locally fixed source of western juniper (Juniperus occidentalis Hook) feedstock. This study identifies a supply of juniper from private lands to determine how much of the available juniper is economically supplied at alternative prices...
Resource Type:: Masters Thesis
Full Text:: land outputs through function g(t,l). In Binkley’s model (1981), timber revenue enters into to the

Size and surface area dependent toxicity of silver nanoparticles in zebrafish embryos (Danio rerio)

Creator:: Tuttle, George R.
Abstract:: Many studies addressing the toxicity of silver nanomaterials have found that smaller sized silver nanoparticles are usually more toxic to organisms and in cell culture than particles of larger sizes yet it is not entirely clear why. We investigated the size dependent toxicity of silver nanoparticles by measuring the response...
Resource Type:: Masters Thesis
Full Text:: , detergent, a towel, a toy teddy bear and two humidifiers at concentrations ranging from 1.4 μg/g to 270

Maximizing urban property values through open space conservation

Creator:: Oakley, Winston
Abstract:: This study investigates the share of open space that maximizes total private property values in urban areas. Open space poses a number of trade-offs to city managers. On the one hand, previous studies have shown that certain kinds of open space can increase property values, which tends to increase tax...
Resource Type:: Masters Thesis
Full Text:: 5.G Implied value of the elasticity of housing demand with respect to open space .....48 5.H

From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling

Creator:: Forsberg, Norman D.
Abstract:: Environmental toxicologists and public health officials are responsible for assisting in the identification, management, and mitigation of public health hazards. As a result, there is a continued need for robust analytical tools that can aid in the rapid quantification and characterization of chemical exposure. In the first research phase, we...
Resource Type:: Dissertation
Full Text:: student committee for their support and encouragement– Jennifer Field, Jeffrey Jenkins, Susan Carozza

New Configurations of Silicone Passive Sampling Devices: Quantifying Feline and Firefighter Chemical Exposures

Creator:: Poutasse, Carolyn M.
Abstract:: Silicone wristbands are passive sampling devices (PSD) that sequester bioavailable organic chemicals in the environment. In environmental health studies, silicone wristbands are easy to wear and can provide personal exposure data about complex chemical mixtures. This dissertation includes an overview of PSD technology, a literature review of current wristband research...
Resource Type:: Dissertation
Full Text:: to know that I am worthy of success. To my committee members, Dr. Staci Simonich, Dr. Jeffrey

Geochemical Fingerprinting of Metals from Non-Ferrous Smelting Emissions within Lake Sediments

Creator:: Rutila, Elizabeth C.
Abstract:: The research presented in this thesis seeks to further our understanding of the geochemical signatures that can be used to trace and quantify non-ferrous smelting emission inputs into the environment. Strong evidence suggests that emissions from the non-ferrous smelter in Trail, BC are the primary source of metals deposited from...
Resource Type:: Masters Thesis
Full Text:: ................................................................................ 105 Appendix G. Geochemistry of endmember ore concentrates

Opening Pandora’s Box: Machine learning applications for chemical forensics and non-target chemical analyses

Creator:: Davila-Santiago, Emmanuel
Abstract:: Water bodies act as chemical data loggers that contain tens of thousands of molecules that represent the sum of the biological, chemical, and physical processes occurring within a watershed. We hypothesize that unique chemical signatures present within a water sample can be informative of upstream processes. By extracting non-polar organic...
Resource Type:: Masters Thesis
Full Text:: Dr. Stephen Good, Dr. Claudia Maier, Dr. Jeffrey Jenkins and Dr. Lewis Semprini, my committee

ScholarsArchive@OSU

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

Spatial and Temporal Variability of Heavy Metals (Lead, Copper, and Zinc) in Stormwater, Moss, and Street Dust in Portland, OR

Groundwater arsenic concentrations and cancer incidence rates : a regional comparison in Oregon

Estimating a juniper biomass supply from private rangelands : the impact of distance and biotic factors on costs

Size and surface area dependent toxicity of silver nanoparticles in zebrafish embryos (Danio rerio)

Maximizing urban property values through open space conservation

From pesticide degradation products to legacy toxicants and emerging contaminants : novel analytical methods, approaches, and modeling

New Configurations of Silicone Passive Sampling Devices: Quantifying Feline and Firefighter Chemical Exposures

Geochemical Fingerprinting of Metals from Non-Ferrous Smelting Emissions within Lake Sediments

Opening Pandora’s Box: Machine learning applications for chemical forensics and non-target chemical analyses

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