NOEC definition

NOEC means no observed effect concentration. The NOEC is the highest concentration of toxicant (e.g., effluent) to which organisms are exposed in a chronic toxicity test [full life-cycle or partial life-cycle (short term) test], that causes no observable adverse effects on the test organisms (i.e., the highest concentration of effluent in which the values for the observed responses are not statistically significantly different from the controls).

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NOEC means No Observed Effect Concentration.

NOEC means the highest tested concentration of a toxic substance, wastewater effluent or other aqueous mixture at which no adverse effects are observed on the aquatic test organ- isms at a specific time of observation. The NOEC is determined using hypothesis testing.

Examples of NOEC in a sentence

Fantail ▇▇▇▇▇▇ larval growth did not exhibit any effects with a NOEC of 2,400 µS/cm and a LOEC >2,400 µS/cm (Figure 25).
Regarding the large uncertainties that are associ- ated with the NOEC (cf.
As described in the laboratory audit directives to the San ▇▇▇▇ Creek Water Quality Laboratory from the State Water Board dated August 07, 2014, and from USEPA dated December 24, 2013, the Percent Minimum Significant Difference (PMSD) criteria only apply to compliance reporting for the no-observed-effect-concentration (NOEC) and the sublethal statistical endpoints of the NOEC, and therefore are not used to interpret TST results.
In chronic fish studies mortality appeared and growth decreased (effect value in one study: no observed effect concentration (NOEC) 5.25 mg/L).
The lowest reliable chronic NOEC for TBT was identified to be 0.06 µg Sn l-1, corresponding to ca.

More Definitions of NOEC

NOEC means the highest tested concentration of a toxic substance, wastewater effluent or other aqueous mixture at

NOEC means the “no observed effect concentration”.

NOEC means the "no observed effect concentration" which is the highest concentration of effluent in a toxicity test shown to have no statistically significant adverse effects when compared to an appro- priate control.

NOEC means no observed effect concentration. The NOEC is the highest concentration of toxicant (e.g., effluent) to which organisms are exposed in a

NOEC means ‘no observed effect concentration’. It is the highest concentration at which no effect on test organisms is observed over a

NOEC means ‘ no observed effect concentration’. It is the highest concentration at which no effect on test organisms is observed over a relatively long period in a chronic aquatic toxicity test.

NOEC. ’ means no observable