median lethal concentration


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median lethal concentration

The average concentration of a chemical or mixture in air as a gas, vapour, mist, fume or dust capable of killing 1/2 of the test animals exposed by inhalation under specific conditions. Median lethal concentration (LC50) is often expressed in ppm or mg/m3.
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Were checked cell growth, by optical density (620 nm), the pH variation, the emergence of spores and crystals, by microscopy, the quantification of spores, by plating on nutrient agar and [LC.sub.50] (median lethal concentration), through bioassays using dilutions of the final culture in Aedes aegypti.
Both percentage of mortality and the median lethal concentration ([LC.sub.50]) were higher in the laboratory than in greenhouse conditions.
The median lethal concentration ([LC.sub.50]) values of spotted babylon, B.
Based on median lethal concentration (LC50) values, all the strains of S.
Further, 420 animals (total length 8.3 [+ or -] 0.88cm; weight 3.96 [+ or -] 1.25g; n=30) were distributed in 14 experimental units (100L capacity each), with 30 fish per unit for median lethal concentration assays of hydrogen peroxide.
The aim of the test was to determine the median lethal concentration (LC50) which was estimated by the probit transformed concentration - response curves (USEPA, 2002).
The median lethal concentration ([LC.sub.50]) estimated to kill 50% of the tested population and 95% confidence intervals (CI) were calculated based on methods by Robertson & Priesler (1992).
Determination of the median lethal concentration ([LC.sub.50]) of mycoinsecticides for the control of Ceratitis capitata (Diptera: Tephritidae)