Results 221 to 230 of about 101,793 (284)

Acute exposure to boron in Nile tilapia (Oreochromis niloticus): Median-lethal concentration (LC50), blood parameters, DNA fragmentation of blood and sperm cells.

Chemosphere, 2018
Recently, Boron (B) contamination of aquatic ecosystem has received considerable critical attention due to its toxic effects at high concentrations on plants as well as animals.
Ü. Acar, B. Inanan, F. Zemheri, O. S. Kesbiç, S. Yılmaz   +4 more
semanticscholar   +1 more source

LC50 baseline levels of amitraz, coumaphos, fluvalinate and flumethrin in populations of Varroa destructor from Buenos Aires Province, Argentina

Journal of Apicultural Research, 2008
Sérgio Ruffinengo, Liesel B Gende, Norma H Sardella   +2 more
exaly   +2 more sources

Thiamethoxam toxicity on the stingless bee Friesiomelitta varia: LC50, survival time, and enzymatic biomarkers assessment.

Chemosphere
Bees play a crucial role as pollinating insects in both natural and cultivated areas. However, the use of pesticides, such as thiamethoxam, has been identified as a contributing factor compromising bee health. The current risk assessment primarily relies
Fernanda Carolaine de Souza, Lucas Miotelo, Geovana Maloni, Igor Vinicius Ramos Otero, Roberta CornéLio Ferreira Nocelli, O. Malaspina   +5 more
semanticscholar   +1 more source

Estimating Short-Term LC50 Values

Fire Technology, 1976
The authors discuss correlations of LC50 data and suggest that one possible use of them may be in the design of toxicity test procedures.
Carlos J. Hilado, Arthur Furst
openaire   +1 more source

Correlation between LC50 for Adult Fish and Fish Embryos

Bulletin of Experimental Biology and Medicine, 2017
Testing for substance toxicity for living organisms is an important step in the development and adaptation of new drugs for various purposes. Analysis of the dependences between toxicological parameters of chemical substances for various test objects and physicochemical properties of these agents is a promising trend. Partition coefficient logP (logKow)
K V, Zolotarev, K V, Nakhod, A N, Mikhailov, M V, Mikhailova   +3 more
openaire   +2 more sources

A QSAR model for predicting toxicity (LC50) to rainbow trout

Water Research, 2002
A fragment constant method for prediction of toxicity (LC50) to rainbow trout was developed based on the experimental LC50 values of 258 chemicals obtained from the literature. The dataset was randomly divided into a training set and a validation set for purposes of model development and validation.
S, Tao, Xiaohuan, Xi, Fuliu, Xu, Richard, Dawson   +3 more
openaire   +2 more sources

Estimators for the LC50

1988
Dit rapport geeft een kritisch overzicht van statistische methoden voor het schatten van de LC50. Met name wordt aandacht besteed aan de bruikbaarheid van deze methoden bij het type gegevens dat bij toxiciteitstoetsen vaak voorkomt.
Hoekstra, JA
openaire   +3 more sources

LC50 (Median Lethal Concentration)

exaly   +2 more sources

Chlorosilane Acute Inhalation Toxicity and Development of an LC50 Prediction Model

Inhalation Toxicology, 2006
The acute inhalation toxicity of 10 chlorosilanes was investigated in Fischer 344 rats using a 1-h whole-body vapor inhalation exposure and a 14-day recovery period. The median lethal concentration (LC50(1)) for each material was calculated from the nominal exposure concentrations and mortality.
Paul A, Jean, Robert H, Gallavan, Gary B, Kolesar, Waheed H, Siddiqui, Jon A, Oxley, Robert G, Meeks   +5 more
openaire   +2 more sources

Methods for Calculating an LC50

1977
A variety of graphical and computational methods can be used to derive a median lethal concentration (LC50) from concentration-mortality data produced by an acute mortality test. In the selection of a method, practical considerations should receive as much attention as the usual theoretical and statistical considerations.
openaire   +1 more source