Browsing by Author "Seward, J. R."

Showing items 1-7 of 7

Cronin, M.T.D.; Manga, N.; Seward, J.R.; Sinks, G.D.; Schultz, T.W. Parametrization of Electrophilicity for the Prediction of the Toxicity of Aromatic Compounds. Chem. Res. Toxicol. 2001, 14, 11, 1498–1505.

Published: Villu Ruusmann (2012-05-23)

Abstract: The aim of this study was to determine which descriptor best parametrized the electrophilicity of aromatic compounds with regard to their acute toxicity. To achieve this, toxicity data for 203 substituted aromatic compounds containing a nitro- or cyano group were evaluated in the 40-h Tetrahymena pyriformis population growth impairment assay. Quantitative ...

Regression
Seward, J.R.; Cronin, M.T.D.; Schultz, T.W. Structure-Toxicity Analyses of Tetrahymena Pyriformis Exposed to Pyridines - An Examination Into Extension of Surface-Response Domains. SAR QSAR Environ. Res. 2001, 11, 5, 489–512.

Published: Villu Ruusmann (2012-05-23)

Abstract: A selection of mechanistically diverse substituted pyridines were tested in the Tetrahymena pyriformis population growth impairment assay. The response-surface approach was used to derive multiple-regression type structure-toxicity relationships between T. pyriformis population growth impairment toxicity data (log(IGC(-1)(50)) and the 1-octanol/water partition ...

Regression
Seward, J.R.; Cronin, M.T.D.; Schultz, T.W. The effect of precision of molecular orbital descriptors on toxicity modeling of selected pyridines. SAR QSAR Environ. Res. 2002, 13, 2, 325–340.

Published: Villu Ruusmann (2012-05-23)

Abstract: The response-surface approach to QSARs attempts to model toxic potency of diverse groups of chemicals while avoiding problems associated with the identification of the mechanism of toxic action or specific chemical class often associated with other approaches. However, while hydrophobicity-dependent, simple regression QSARs derived for congeneric series of ...

Dataset
Seward, J.R.; Hamblen, E.L.; Schultz, T.W. Regression comparisons of Tetrahymena pyriformis and Poecilia reticulata toxicity. Chemosphere 2002, 47, 1, 93–101.

Published: Villu Ruusmann (2012-05-23)

Abstract: The toxicity data of chemicals common to both the Poecilia reticulata mortality assay and the Tetrahymena pyriformis growth impairment assay were evaluated. Two chemicals were not toxic at saturation in the T. pyriformis assay. In addition, due to abiotic transformation, a third chemical was removed from further consideration. Each chemical was a priori assigned ...

EcoTox Dataset
Seward, J.R.; Schultz, T.W. QSAR Analyses of the Toxicity of Aliphatic Carboxylic Acids and Salts to Tetrahymena Pyriformis. SAR QSAR Environ. Res. 1999, 10, 6, 557–568.

Published: Villu Ruusmann (2012-05-23)

Abstract: Carboxylic acids have been conspicuously absent from the quantitative structure activity relationship (QSAR) literature. This study investigated the aquatic toxicity (log(IGC50(-1)) of selected mono- and di-carboxylic acids and their sodium, or disodium salts, tested in the Tetrahymena population growth assay. The relationship between log(IGC50(-1)) and ...

Regression
Seward, J.R.; Sinks, G.D.; Schultz, T.W. Population Growth Kinetics of Tetrahymena pyriformis Exposed to Selected Pyridines. Eur. J. Protistol. 2000, 36, 2, 139–149.

Published: Villu Ruusmann (2012-05-23)

Abstract: Alterations in growth kinetics of populations of the freshwater ciliate Tetrahymena pyriformis due to exposure to six specific pyridines were investigated. Selected pyridines varied in mode of toxic action and hydrophobicity (quantified by the logarithm of the 1-octanol-water partition coefficient, log Kow). Three pyridines containing lower hydrophobicity (log ...

Dataset
Seward, J.R.; Sinks, G.D.; Schultz, T.W. Reproducibility of toxicity across mode of toxic action in the Tetrahymena population growth impairment assay. Aquat. Toxicol. 2001, 53, 1, 33–47.

Published: Villu Ruusmann (2012-05-23)

Abstract: Toxicity data collected in a laboratory setting are the primary source of potency information used for regulatory, modeling, or risk assessment purposes. However, the relative reproducibility of such toxicity data is rarely discussed. This study investigated the reproducibility of growth impairment data for the freshwater ciliate Tetrahymena pyriformis exposed ...

Dataset

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