Results 221 to 230 of about 95,173 (266)

Determination of concetration-time-mortality relationships versus LC50s according to OECD guideline 403

Experimental Pathology, 1989
The effect of decreasing the number of animals on the accuracy of estimated concentration-time-mortality relationships and the LC50 values derived from these was investigated by means of simulation methods. Studies of NH3, Cl2, H2S, and COCl2 were made using 5 rats per sex per group.
Arts, J.H.E., Zwart, A., Schoen, E.D., Klokman-Houweling, J.M.   +3 more
openaire   +3 more sources

Predicting relative metal toxicity with ion characteristics: Caenorhabditis elegans LC50

Aquatic Toxicology, 1997
Abstract Quantitative Structure Activity Relationships (QSAR) predict relative toxicity of a family of chemicals from fundamental and surrogate molecular qualities. Most QSARs are developed for organic toxicants, with inorganic toxicants (metals) being under-represented.
Christopher P. Tatara, Michael C. Newman, John T. McCloskey, Phillip L. Williams   +3 more
openaire   +1 more source

LC50 Value of Paraquat (24%) in Drosophila Melanogaster Larvae

BIOINFOLET - A Quarterly Journal of Life Sciences
AbstractThe objective of present investigation was to determine the Lethal Concentration 50 (LC50) of commercially available paraquat. a herbicide, at 24 % dilution with second instar larvae of Drosophila melanogaster. For this purpose the second instar larvae, were exposed to different concentrations of paraquat (20, 22, 24, 26 and 28 µl/ml ...
Girima Nagda, Chhavi Bhalothia
openaire   +1 more source

Comparison of LC50 Results from Commonly Used Computer Programs

1998
Using 50 data sets, this paper compares LC50s computed by several, commonly used computer programs. Programs evaluated include: Stephan, TOXSTAT®, ToxCalc™, U.S. Environmental Protection Agency (PROBIT and TSK), and this author's SAS® program. Numeric comparisons are made of both the LC50 estimate and its 95% confidence limits.
openaire   +1 more source

LC50

2008
Laura T. Miller, Lionel Stange, Charles MacVean, Jorge R. Rey, J. H. Frank, R. F. Mizell, John B. Heppner, John B. Heppner, John L. Capinera, Dorothy Feir, Christian Borgemeister, George Hangay, R. Wills Flowers, John B. Heppner, Klaus Jaffe, Chris H. Dietrich, Stéphanie Boucher, John B. Heppner, Whitney Cranshaw, Whitney Cranshaw, John B. Heppner, Spencer T. Behmer, Fred Punzo, Drion Boucias, Severiano F. Gayubo, Peter E. Kima, Yousif Aldryhim, John L. Capinera, Diane M. Calabrese, John B. Heppner, James L. Nation, Dan M. Harman, John B. Heppner, Qiao Wang, Marc A. A. Pollet, Scott E. Brooks, John B. Heppner, Norman C. Leppla, Douglas E. Norris, John B. Heppner   +39 more
openaire   +2 more sources

Standard error of lc50 and sample size in fish bioassays

Water Research, 1972
Abstract The relationship between the relative error and sample size in fish bioassays was investigated empirically and theoretically. It was shown that if the mean concentration tested is near the estimated lc 50 and the same sample size is used at each test level, the dependence of relative error on sample size is predictable.
openaire   +1 more source

96 h LC50, behavioural alterations and histopathological effects due to wastewater toxicity in a freshwater fish Channa punctatus

Environmental science and pollution research international, 2015
Rajbir Kaur, A. Dua
semanticscholar   +1 more source

Incorporating variability in point estimates in risk assessment: Bridging the gap between LC50 and population endpoints

Environmental Toxicology and Chemistry, 2015
J. Stark, R. Vargas, J. Banks
semanticscholar   +1 more source

Introduction of moribund category to OECD fish acute test and its effect on suffering and LC50 values

Environmental Toxicology and Chemistry, 2012
H. Rufli
semanticscholar   +1 more source

Comments on "Calculating the LC50 Value"

Journal of Fire Sciences, 1990
Sara M. Debanne, Douglas Y. Rowland
openaire   +1 more source