Enhancing the Ecological Risk Assessment Process (2008)
Virginia H. Dale, Gregory R. Biddinger, Michael C. Newman, James T. Oris, Glenn W. Suter, Timothy Thompson, ...
EDITOR'S NOTE: This is 1 of 4 papers from the US Environmental Protection Agency Science Advisory Board's Ecological Processes and Effects Committee workshop on the current and future practice of...
Development of Techniques for the Evaluation of Toxicant Impacts to Multispecies Systems (2006)
Landis, Wayne G., Matthews, Robin A., Matthews, Geoffrey B.
In this research program, new methods of data analysis were applied to the analysis of multispecies toxicity tests using three complex toxicants. The water soluble traction of the turbine fuels...
Sellens, Laura J. (Laura Jean), Landis, Wayne G.
Caption title.
Evaluation of Graphite for Environmental Toxicity Using the Standard Aquatic Microcosm (2003)
Landis, Wayne G., Chester, Nancy A., Haley, Mark V., Johnson, Dennis W., Tauber, Renee M.
The impact of a graphite dust on an aquatic ecosystem model, the Standard Aquatic microcosm (SAM), was investigated. Graphite dust produced effects that resembled eutrophication in that a diversity...
Landis, Wayne G., Chester, Nancy A., Haley, Mark V., Johnson, Dennis W.
The impact of brass dust on a model aquatic ecosystem, the Standard Aquatic Microcosm (SAM), was investigated. Brass dust had dramatic effects on the interaction of trophic levels, community...
Toxicity of Brass Particulate to Daphnia magna. (2002)
Johnson,Dennis W., Haley,Mark V., Hart,Gayle S., Muse,William T., Landis,Wayne G.
The aquatic toxicity of a brass particulate was examined. Acute, 48-hour bioassays were performed using the water flea, Daphnia magna. Tests were conducted with uniform suspensions of uncoated brass...
Aquatic Toxicity of Pinacolyl Alcohol. (2002)
Haley,Mark V., Johnson,Dennis W., Muse,William T., Landis,Wayne G.
The aquatic toxicity of a secondary alcohol, 3,3-Dimlethyl-2-butanol Pinacolyl Alcohol (PA), was determined. Acute tests were conducted on Pimephales promelas, 48 hr EC50 = 443.1 mg PA/1, and Daphnia...
The Population Dynamics of the Spotted Turtle, Clemmys guttata, on Carroll Island. (1998)
Landis,Wayne G., Johnson,Dennis W., Infiesto,Bernardita, Lamb,Martha C., Haley,Mark V.
The population dynamics and structure of the spotted turtle, Clemmys guttata, were studies from 1970 until 1982. Carroll Island was the site of chemical testing from post WW II until 1971. Special...
Haley, Mark V., Landis, Wayne G.
The term DFPase describes an enzyme capable of hydrolyzing an organofluoromonophosphate. Partially purified preparations of DFPase were subjected to flatbed thin-layer isoelectric focusing (IEF) in...
Activity of Organophosphate Acid Anhydrase in Rangia cuneata. (1998)
Chester, Nancy A., Landis, Wayne G.
Enzymes capable of hydrolyzing diisopropyl fluorophosphate (DFP) and related acetylcholinesterase inhibitors, have been reported in the tissues of many animals and have recently been renamed as...
Mipafox as a Substrate for Rangia-DFPase. (1998)
Chester, Nancy A., Anderson, Robert S., Landis, Wayne G.
The effect of mipafox (N,N'-diisopropylphosphordiamidofluoridate) on the DFPase activity of clam digestive gland was investigated. An increasing trend in hydrolysis rates resulted where mipafox...
The Acute, Aquatic Toxicity of Selected Mineral Particles. (1998)
Johnson, Dennis W., Landis, Wayne G.
Graphite fibers, nickel-graphite fibers, polycrystalline iron whiskers, and graphite Mirco-260 (M-260) were tested to determine their toxicities to Daphnia magna. The graphite fibers and...
The Acute Toxicity of Isopropylamine and 2-Methylcyclohexanol. (1998)
Haley, Mark V., Landis, Wayne G.
The toxicity of isopropylamine (IPA) and 2-methylcyclohexanol (2-MCH) was determined. Acute 48-hr bioassays were performed using the water flea, Daphnia magna. Ninety-six hour, growth inhibition...
Toxicity of Jet A (Aviation Fuel) Selected Aquatic Organisms. (1998)
Haley, Mark V., Landis, Wayne G.
JP8 (jet propulsion) is an aviation fuel being considered for replacement of diesel fuel used in the generation of smoke on the battlefield. JP8 is projected to be more economical and also be used as...
Landis, Wayne G., Matthews, Robin A.
The program has evaluated the toxicity of two complex mixtures, the water soluble fractions (WSF) of the commercial turbine fuel Jet-A and the military fuel JP-4 using single species toxicity tests...
Landis, Wayne G., Matthews, Robin A.
A common assumption in environmental toxicology is that after the initial impact, ecosystems recover to resemble the control state. This assumption may be based more on our inability to observe an...
Landis, Wayne G., Matthews, Robin A., Matthews, Geoffrey B.
We have developed and confirmed experimentally the Community Conditioning Hypothesis. The hypothesis states that impacts to ecological structures are persistent, the variables containing information...
Vita.
The factors maintaining the cytoplasmically inherited killer trait in populations of Paramecium tetraurelia and Paramecium biaurelia were examined using, in part, computer simulation. Frequency of...
The factors maintaining the cytoplasmically inherited killer trait in populations of Paramecium tetraurelia and Paramecium biaurelia were examined using, in part, computer simulation. Frequency of...