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.
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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:

  • Alcohol concentration means the number of grams of alcohol per:

  • median concentration means that half of the homes in a county are expected to be below this value and half to be above it. All houses contain some radon, and a few houses will contain much more than the median concentration. The only way to accurately assess long-term exposure to radon in a specific house is through long-term testing (sampling the indoor air for a year or more). The EPA recommends that all homes be tested for radon. Columbia University's "Radon Project" website offers help to homeowners in assessing the cost vs. benefit of testing a specific house for radon or modifying it for radon reduction (see http://www.stat.columbia.edu/~radon/).

  • Derived air concentration (DAC) means the concentration of a given radionuclide in air which, if breathed by the reference man for a working year of 2,000 hours under conditions of light work, results in an intake of one ALI. For purposes of these regulations, the condition of light work is an inhalation rate of 1.2 cubic meters of air per hour for 2,000 hours in a year. DAC values are given in Part 4, Appendix 4B, Table 4B1, Column 3.

  • Excess Concentration means the sum of the following amounts, without duplication:

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

  • Critical Test Concentration or "(CTC)" means the specified effluent dilution at which the Permittee is to conduct a single-concentration Aquatic Toxicity Test.

  • In-stream Waste Concentration or "(IWC)" means the concentration of a discharge in the receiving water after mixing has occurred in the allocated zone of influence.

  • iron ore concentrates means products (whether in pellet or other form) resulting from secondary processing but does not include metallised agglomerates;

  • 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.

  • Cannabinoid concentrate means a substance obtained by separating cannabinoids from marijuana by:

  • Daily Concentration means the concentration of a substance as measured in a daily composite sample, or, arithmetic average of all grab sample results defining a grab sample average.

  • Obligor Concentration Limit At any time, in relation to the aggregate Unpaid Balance of Receivables owed by any single Obligor and its Affiliated obligors (if any):

  • Excess Concentration Amount means, as of any date of determination on which any one or more of the Concentration Limitations are exceeded, an amount (calculated by the Servicer and without duplication) equal to the Dollar Equivalent of the portion of the Adjusted Principal Balance of each Eligible Collateral Loan that causes such Concentration Limitation to be exceeded.

  • Cannabis concentrate means cannabis that has undergone a process to concentrate one or more active cannabinoids, thereby increasing the product’s potency. Resin from granular trichomes from a cannabis plant is a concentrate for purposes of this division. A cannabis concentrate is not considered food, as defined by Section 109935 of the Health and Safety Code, or a drug, as defined by Section 109925 of the Health and Safety Code.

  • Marijuana concentrate means any type of marijuana product consisting wholly or in part of

  • Maximum Concentration Level Assessment means the Maximum Concentration Level Assessment for the purposes of a Basic Comprehensive Certificate of Approval, described in the Basic Comprehensive User Guide, prepared by a Toxicologist using currently available toxicological information, that demonstrates that the concentration at any Point of Impingement for a Compound of Concern that does not have a Ministry Point of Impingement Limit is not likely to cause an adverse effect as defined by the EPA. The concentration at Point of Impingement for a Compound of Concern must be calculated in accordance with O. Reg. 419/05.

  • Medical marijuana concentrate means a specific subset of Medical Marijuana that was produced by extracting cannabinoids from Medical Marijuana. Categories of Medical Marijuana Concentrate include Water-Based Medical Marijuana Concentrate, Food-Based Medical Marijuana Concentrate and Solvent-Based Medical Marijuana Concentrate.

  • Bondable stranded costs rate order means one or more

  • Cannabis processing facility means a person that:

  • 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.

  • Loop Concentrator/Multiplexer or "LCM" is the Network Element that does one or more of the following: aggregates lower bit rate or bandwidth signals to higher bit rate or bandwidth signals (multiplexing); disaggregates higher bit rate or bandwidth signals to lower bit rate or bandwidth signals (demultiplexing); aggregates a specified number of signals or channels to fewer channels (concentrating); performs signal conversion, including encoding of signals (e.g., analog to digital and digital to analog signal conversion); or in some instances performs electrical to optical (E/O) conversion. LCM includes DLC, and D4 channel banks and may be located in Remote Terminals or Central Offices.

  • Concentration Accounts has the meaning ascribed to it in Annex C.

  • concentrates means flavoring ingredients and, depending on the product, sweeteners used to prepare syrups or finished beverages;