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Articles 1 - 7 of 7
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Uptake Of Gold Nanoparticles In An Algae - Daphnid Food Chain, Matthew Osborne-Koch
Uptake Of Gold Nanoparticles In An Algae - Daphnid Food Chain, Matthew Osborne-Koch
All Theses
Nanoparticle entry into the environment can result in deleterious effects to exposed organisms, disruption of ecological processes, and accumulation within the wood web. Gold nanoparticles (AuNPs), which are classified as zero-valent metals, are of significant interest due to their use in a variety of applications including electrical, biomedical, catalytic, magnetic, and optical technology. The wide range of uses for AuNPs can be attributed to a combination of the unique physical properties of the element gold (i.e. density, conductivity, stability, etc.) and the diversity of sizes, shapes, and surface compositions that can be achieved through manipulation of AuNP synthesis. While previous …
The Effects Of Pulsed Exposures Of Suspended Clay On The Survival, Growth, And Reproduction Of Daphnia Magna, Sarah Robinson
The Effects Of Pulsed Exposures Of Suspended Clay On The Survival, Growth, And Reproduction Of Daphnia Magna, Sarah Robinson
All Theses
Suspended sediments are a natural component of aquatic ecosystems but anthropogenic activity such as land development can result in significant increases, especially following rain events due to surface erosion. Continuous exposures of suspended clay and silt have been shown to effect growth and reproduction of Cladocera, leading to a decrease in population growth rate. The mechanism of clay toxicity in these filter-feeding organisms is clogging of the gut tract resulting in decreased food uptake and assimilation. When placed in clean water, daphnids can purge clay from their gut and recover. In many surface waters, aquatic organisms experience episodic exposures of …
Analysis Of Mercury And Lead In Birds Of Prey From Gold-Mining Areas Of The Peruvian Amazon, Peggy Shrum
Analysis Of Mercury And Lead In Birds Of Prey From Gold-Mining Areas Of The Peruvian Amazon, Peggy Shrum
All Theses
This study was conducted to determine levels of lead and mercury in the raptors of the South-eastern Peruvian Amazon. The study took place within the Los Amigos Conservation Concession in Madre de Dios, Peru. Eighty-six raptors from among sixteen species were captured with Bal-Chatri traps. From each individual, feather samples were obtained for mercury analysis and blood was taken for lead analysis. Each raptor was then released without incident or injury.
Mercury amalgamation for gold extraction is widely used by small-scale, transient mining operations, which are numerous along the rivers and creeks in the tropical forests and other locations in …
Risk Assessment Of Bird Aircraft Strike Hazard For Grassland Birds At The Mcentire Air National Guard Station, Eastover, South Carolina, Marla Hamilton
Risk Assessment Of Bird Aircraft Strike Hazard For Grassland Birds At The Mcentire Air National Guard Station, Eastover, South Carolina, Marla Hamilton
All Theses
ABSTRACT
There are strict regulations surrounding vegetation management at military airfields for the purpose of reducing Bird Aircraft Strike Hazards (B.A.S.H.). At military installations vegetation heights are set between 17 to 38 cm to discourage the use of animal species such as flocking birds, soarers (e.g. raptors), large wading birds (e.g. herons), and waterfowl that create hazards to flying aircraft. Within designated clear zones, managers have typically promoted the growth of non - non-native grasses without much consideration for how these plantings might impact B.A.S.H. potential, bird occupancy, or avian conservation. Grasslands and grassland associated avifauna are among the 'highest …
Roost Selection By Rafinesque's Big-Eared Bats, Corynorhinus Rafinesquii, In Congaree National Park - A Multiscale Approach, Jessica Lucas
Roost Selection By Rafinesque's Big-Eared Bats, Corynorhinus Rafinesquii, In Congaree National Park - A Multiscale Approach, Jessica Lucas
All Theses
Little is known about natural roost selection of Rafinesque's big-eared bats, Corynorhinus rafinesquii , throughout their range. The objectives of this study were to determine roost use and selection of big-eared bats in the Upper Coastal Plain of South Carolina at multiple spatial scales and test whether roost use and selection differed between maternity colonies and solitary individuals. The study was conducted May-August 2006 and 2007 in Congaree National Park which contains extensive areas of old-growth bottomland forest. Roost trees were located via tree searches and radio-telemetry and I used univariate tests and multiple logistic regression to compare tree, stand, …
Water Quality Guidelines And Water Quantity Analysis With Application To Construction Of A Pilot-Scale Wetland Treatment System, Minh Phung Pham
Water Quality Guidelines And Water Quantity Analysis With Application To Construction Of A Pilot-Scale Wetland Treatment System, Minh Phung Pham
All Theses
A searchable database consisting of compiled water reuse guidelines was created as a screening tool for decision-analysis for potential beneficial reuse in 1) irrigation, 2) livestock watering, 3) aquaculture, and 4) drinking (potable) water. Data compiled from literature for the four water reuses (FWR) yielded guideline values for over 50 water quality parameters, including concentrations of inorganic and organic constituents as well as general water chemistry parameters. These water quality guidelines can be used to identify constituents of concern in water, to determine levels to which constituents must be treated for water reuse applications, and to assess the suitability of …
Testing The Individual Effective Dose Hypothesis, Hung Vu
Testing The Individual Effective Dose Hypothesis, Hung Vu
All Theses
The assumption of the individual effective dose is the basis for the probit method used for analyzing dose or concentration – response data. According to this assumption, each individual has a uniquely innate tolerance expressed as the individual effective dose (IED) or the smallest dose that is sufficient to kill it. An alternative to IED, stochasticity suggests that individuals do not have uniquely innate tolerance; deaths result from random processes occurring among similar individuals. While the probit method has been used extensively in toxicology the underlying assumption has not been tested rigorously. The goal of this study was to test …