no observable effect

no observable effect

Environment adjective Referring to a lack of observable changes associated with a potentially dangerous or toxic chemical. See Bounty hunter provision, No significant risk, Proposition 65.
References in periodicals archive ?
2002) was termed a no observable effect level (NOEL) by the National Research Council (NRC 2005).
An addition of a eutectic modifier had no observable effect on the X-ray rating.
Even the fact that the Rota overturned over 90% of the appeals made to it from the United States has had no observable effect.
04 mg/kg/day), might be considered a no observable effect level (NOEL) from this experiment.
There was no observable effect of estradiol on the dorsal fin notch in these experiments.