Effect concentration definition

Effect concentration or "EC50" means the toxicant concentration that causes equilibrium loss, immobilization, mortality, or other debilitating effects in 50 percent of the exposed organisms during a specific time of observation.
Sample 1Sample 2Sample 3

Examples of Effect concentration in a sentence

  • It is a straight-line measure, not measured over the curve of the body (www.fishbase.org) Figure 1: Description of the different lengths used Chemical: a substance or a mixture ECx: (Effect concentration for x% effect) is the concentration that causes an x% of an effect on test organisms within a given exposure period when compared with a control.

  • The law does not provide for any exceptions.Where a child under ten years of age is adopted and where he can express his or her opinion, he/she must be heard out in court and the court must take his/her wishes into account when adopting the decision if this does not contravene to the interests of the child.

  • The use of target organ concentrations substantially shifted the magnitude of dose- response parameters and the relative toxicity ranking of chemicals studied.Keywords PBPK model, Danio rerio, Zebrafish embryo, Bayesian, Development, Effect concentration, Valproic acid, Internal concentration, Toxicity.

  • SQGs = Sediment Quality Guidelines, TEC = Threshold Effect concentration, and PEC = Probable Effect Concentration (MacDonald et al., 2000).

  • Effect concentration data in terrestrial plants to estimate direct effects to riparian vegetation.

  • Ophthalmological evaluation reviewed with two experts confirmed the presence of chorioretinal lacunae (Figure 1-o).

  • Considering only tests performed in an OECD 202 acute test design, European Commission (2005) and Spain (2017b) identified Daphnia magna as the most sensitive species with a 48-hours Effect concentration (EC50) of 0.1 µg/L.

  • It is a straight-line17 measure, not measured over the curve of the body (www.fishbase.org) 181920 212223 ECx: (Effect concentration for x% effect) is the concentration that causes an x% of an effect on test24 organisms within a given exposure period when compared with a control.

  • This field contains the same drop-down menu as the unit field in the ‘Phys-Chem’ part of the GUI with 16 different units (dimensionless, °C, g/cm³ at 20°C, hPa at 20°C, vol/vol, g/L, g/mol, Pa, bar, atm, torr, mm Hg, psi, kg/cm², mg/L and µg/L).~ Effect concentration.

  • This field contains the same drop-down menu as the unit field in the ‘Phys-Chem’ part of the GUI with 16 different units (dimensionless, °C, g/cm³ at 20°C, hPa at 20°C, vol/vol, g/L, g/mol, Pa, bar, atm, torr, mm Hg, psi, kg/cm², mg/L and µg/L).∼ Effect concentration.

Related to Effect concentration

  • Net concentration means the difference between the concentration of a given substance in a sample taken of the discharge and the concentration of the same substances in a sample taken at the intake which supplies water to the given process. For the purpose of this definition, samples that are taken to determine the net concentration shall always be 24-hour composite samples made up of at least six increments taken at regular intervals throughout the plant day.

  • Baseline concentration means that ambient concentration level that exists in the baseline area at the time of the applicable minor source baseline date. A baseline concentration is deter- mined for each pollutant for which a minor source baseline date is estab- lished and shall include:

  • Background concentration means such concentration of that substance as is present in:

  • Concentration means the weight of any given material present in a unit volume of liquid. Unless otherwise indicated in this permit, concentration values shall be expressed in milligrams per liter (mg/l).

  • Residual disinfectant concentration means the concentration of disinfectant measured in mg/L in a representative sample of water.

  • Bondable stranded costs rate order means one or more

  • Materials of Environmental Concern any gasoline or petroleum (including crude oil or any fraction thereof) or petroleum products or any hazardous or toxic substances, materials or wastes, defined or regulated as such in or under any Environmental Law, including asbestos, polychlorinated biphenyls and urea-formaldehyde insulation.