Index Catalog // ScholarsArchive@OSU

Extreme Precipitation Appears a Key Driver of Mercury Transport from the Watershed to Cottage Grove Reservoir, Oregon

Creator:: Curtis, Lawrence R., Morgans, Donna L., Thoms, Bryn, and Villenueve, Daniel
Abstract:: An abandoned cinnabar mining and roasting site is in the major sub-basin of the watershed for Cottage Grove Reservoir, Oregon. Average surface sediment total mercury concentration in the river draining this sub-basin (0.61±0.52 μg /g) was about ten-fold higher than three smaller tributaries to the reservoir. Total mercury in reservoir...
Resource Type:: Article
Full Text:: surface sediment total 43 mercury concentration in the river draining this sub-basin (0.61±0.52 µg /g

Semi-volatile organic compounds and developing organisms : accumulation in California mountain tadpoles in the field and fish embryo exposures in the laboratory

Creator:: Stanley, Kerri A.
Abstract:: The atmospheric transport and deposition of semi-volatile organic compounds (SOCs), including current and historic use pesticides, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), to mountain ecosystems may result in the exposure of tadpoles to these SOCs. This exposure has been implicated in amphibian population declines in California. Tadpoles encounter...
Resource Type:: Dissertation
Full Text:: µg/L, corresponding to tissue EC50s of 367 ng/g and 4552 ng/g wet weight, respectively. However

Evaluating the Dietary Toxicity of Per- and Polyfluoroalkyl Substances and Development of a High Throughput Non-Invasive Zebrafish Cortisol Assay

Creator:: Leong, Connor A.
Abstract:: Per- and polyfluoroalkyl substances (PFAS) are contaminants of concern because they do not readily degrade in the environment. Some in vivo studies report that PFAS alter neurological development and are carcinogenic. Perfluorohexanesulfonamide (FHxSA) and 6:2 fluorotelomer sulfonate (6:2 FTS) are two PFASs, which are often detected in drinking water sources....
Resource Type:: Masters Thesis
Full Text:: analytically verified contaminated feed, containing 1 ng/g or 100 ng/g of FHxSA or 6:2 FTS from 17-60 days

A Multi-Tiered Approach Using Daphnia magna to Assess Chlorpyrifos Risk to Aquatic Receptors

Creator:: Maggio, Stephanie A.
Abstract:: Chlorpyrifos (CPF) is a widely used broad-spectrum organophosphate insecticide. Following exposures, CPF and its more toxic oxon metabolite (CPFO) elicit neurotoxic effects by inhibiting the activity of the acetylcholinesterase enzyme (AChE), resulting in altered fitness and death at high doses. Following exposure, organisms bioactivate CPF to CPFO through the Cytochrome...
Resource Type:: Dissertation
Full Text:: lethal concentration (LC50) of 0.76 μg/L for CPF and 0.32 μg/L for CPFO, suggesting that CPFO is 2.4

Antioxidant enzyme response in rainbow trout (Oncorhynchus mykiss) after subchronic exposure to an environmentally-relevant polycyclic aromatic hydrocarbon mixture

Creator:: Norby, Tyler S.
Abstract:: Polycyclic aromatic hydrocarbons (PAHs) are significant pollutants in aquatic environments. Many are carcinogenic and lead to DNA fragmentation and adduct formation in marine and freshwater organisms. Previous research demonstrates that rainbow trout (Oncorhynchus mykiss) compensate to long-term PAH dietary exposures and reduce the DNA damage. The aim of this study...
Resource Type:: Masters Thesis
Full Text:: was 20 g. At days 7, 14, 28 and 42 enough fish were sacrificed from each of the four treatment

Predation by zooplankton on Batrachochytrium dendrobatidis: Biological control of the deadly amphibian chytrid fungus?

Creator:: Buck, Julia C., Truong, Lisa, and Blaustein, Andrew R.
Abstract:: Batrachochytrium dendrobatidis (hereafter Batrachochytrium), a fungal pathogen of amphibians, causes the disease chytridiomycosis which is responsible for unprecedented population declines and extinctions globally. Host defenses against chytridiomycosis include cutaneous symbiotic bacteria and anti-microbial peptides, and proposed treatment measures include use of fungicides and bioaugmentation. Efforts to eradicate the fungus from...
Resource Type:: Article
Full Text:: , Robertson H, Lock B, Raxworthy CJ, Frost DR, Lacy RC, Alford RA, Campbell JA, Parra-Olea G, Bolanos F

Ligand selective regulation of cell growth by the Ah receptor through activation of TGF-beta signaling, Ligand selective regulation of cell growth by the Ah receptor through activation of TGFβ signaling

Creator:: Koch, Daniel C.
Abstract:: The Aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor and member of the basic helix-loop-helix Per/ARNT/Sim (bHLH/PAS) family of chemosensors and developmental regulators. As a member of the PAS domain family of transcription factors responsive to exogenous signals, the AhR exerts influence on many processes relating to cellular fate....
Resource Type:: Dissertation
Full Text:: States of America 99(15): 9990-9995. Barretina, J., G. Caponigro, N. Stransky, K. Venkatesan, A. A

Investigations into the mechanism of 2,3,7,8-tetrachlorodibenzo-p-dioxin-induced immune suppression: effects on dendritic cell phenotype and function

Creator:: Vorderstrasse, Beth A.
Abstract:: T cell-dependent immune responses are highly sensitive to suppression by exposure to the environmental contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), yet direct effects of TCDD on T cells have been difficult to demonstrate. Because the activation of naive T cells is initiated by dendritic cells (DC), the studies presented in this dissertation were...
Resource Type:: Dissertation
Full Text:: from a polymorphism in the ligand binding domain of the receptor (Ema et at., 1994). Although data

The influence of aryl hydrocarbon receptor activation on T cell fate

Creator:: Funatake, Castle J.
Abstract:: 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and related compounds are well-recognized for their immunosuppressive activity, which is mediated through an intracellular receptor and transcription factor, aryl hydrocarbon receptor (AhR). Laboratory animals exposed to TCDD are less resistant to infection and have severely impaired humoral and cell-mediated immune responses. This dissertation addressed the hypothesis that...
Resource Type:: Dissertation
Full Text:: value in the range of 109M (Ema et al. 1994). Sources of HA H PCB were produced extensively in the US

Assessing the toxicity of nanoplastics using the primary human bronchial epithelial model

Creator:: Germano, Francesca
Abstract:: Emerging data showing the presence of atmospheric microplastics (MPs) has recently raised awareness surrounding the potential of human nanoplastics (NPs) exposure. Due to factors such as weathering, UV exposure, and other biodegradation processes, plastic pollution in the environment breaks down over time into micro (<5 micrometers) and nanoscale (<1000nm) particles....
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Extreme Precipitation Appears a Key Driver of Mercury Transport from the Watershed to Cottage Grove Reservoir, Oregon

Semi-volatile organic compounds and developing organisms : accumulation in California mountain tadpoles in the field and fish embryo exposures in the laboratory

Evaluating the Dietary Toxicity of Per- and Polyfluoroalkyl Substances and Development of a High Throughput Non-Invasive Zebrafish Cortisol Assay

A Multi-Tiered Approach Using Daphnia magna to Assess Chlorpyrifos Risk to Aquatic Receptors

Antioxidant enzyme response in rainbow trout (Oncorhynchus mykiss) after subchronic exposure to an environmentally-relevant polycyclic aromatic hydrocarbon mixture

Predation by zooplankton on Batrachochytrium dendrobatidis: Biological control of the deadly amphibian chytrid fungus?

Ligand selective regulation of cell growth by the Ah receptor through activation of TGF-beta signaling, Ligand selective regulation of cell growth by the Ah receptor through activation of TGFβ signaling

Investigations into the mechanism of 2,3,7,8-tetrachlorodibenzo-p-dioxin-induced immune suppression: effects on dendritic cell phenotype and function

The influence of aryl hydrocarbon receptor activation on T cell fate

Assessing the toxicity of nanoplastics using the primary human bronchial epithelial model

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search