No observed effect concentration definition

No observed effect concentration or "NOEC" means the highest tested concentration (expressed as a per cent by volume) of an effluent or a toxicant that causes no statistically significant observed effects on a test organism during a specified exposure period.

No observed effect concentration. (“NOEC”) means the highest tested concentration of an effluent or toxicant at which no adverse effects are observed on the aquatic test organisms at a specific time of observation.

No observed effect concentration or “NOEC” means the highest test concentration at which there is no statistically significant reduction in survival, growth, or reproduction/fecundity as compared to the laboratory control or reference sample.

Examples of No observed effect concentration in a sentence

• No observed effect concentration (28 d) 0,00128 mg/l, Mysidopsis bahia (OPP 72-4 (EPA-Guideline), Flow through.)The statement of the toxic effect relates to the analytically determined concentration.

• No observed effect concentration (28 d) 0.00128 mg/l, Mysidopsis bahia (OPP 72-4 (EPA-Guideline), Flow through.)The statement of the toxic effect relates to the analytically determined concentration.

• No observed effect concentration (28 d) 0,013 mg/l, Oncorhynchus mykiss (Flow through.) The statement of the toxic effect relates to the analytically determined concentration.

• No observed effect concentration (NOEC) means the highest tested concentration of an effluent or a toxicant at which no adverse effects are observed on the aquatic test organisms at a specific time of observation and determined using hypothesis testing.

• No observed effect concentration (24 h) > 10 mg/l (growth rate), Desmodesmus subspicatus (OECD Guideline 201)The product has not been tested.

More Definitions of No observed effect concentration

No observed effect concentration or "NOEC" means the highest concentration of a chemical evaluated in an aquatic toxicity test that does not cause a statistically significant difference in effects compared with controls.

No observed effect concentration. (“NOEC”) means the highest tested concentration of an effluent

No observed effect concentration. (NOEC), means the highest per cent concentration of a discharge or water sample, in dilution water, which causes no observable adverse effect in a chronic toxicity test. For example, an NOEC of 100 per cent indicates that an undiluted discharge or water sample causes no observable adverse effect to the organisms in a chronic toxicity test. "Test of Significant Toxicity" (TST) means the alternative statistical method for analyzing and interpreting valid whole effluent toxicity test data as described in the EPA publications, National Pollutant Discharge Elimination System Test of Significant Toxicity Implementation Document, EPA 833-R-10-003 (June 2010), and National Pollutant Discharge Elimination System Test of Significant Toxicity Technical Document, EPA 833-R-10-004 (June 2010).

No observed effect concentration means the highest concentration of an effluent tested, which does not exhibit a toxic effect.

No observed effect concentration or "NOEC" means the highest tested concentration (expressed as a per cent by volume) of an effluent or a toxicant

No observed effect concentration. (NOEC), means the highest [per cent]percent concentration of a discharge or water sample, in dilution water, which causes no observable adverse effect in a chronic toxicity test. For example, [an]a NOEC of [100 per cent]one hundred percent indicates that an undiluted discharge or water sample causes no observable adverse effect to the organisms in a chronic toxicity test.

No observed effect concentration. (“NOEC”) means the highest concentration of an effluent or toxicant to which organisms are exposed in a life cycle or partial life-cycle test, that causes no observable adverse effects on the test organisms.