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NOECs abbr.
abbr., earth.sc.	non-observation effective concentrations
NOEC abbr.
abbr., O&G	for discharges, the critical dilution must be equal or less than the NOEC; no observed effect concentration (the greatest effluent dilution which does not result in lethality that is statistically different from the control 0% effluent at the 95% confidence level (MichaelBurov); no observed effect concentration [the greatest effluent dilution which does not result in lethality that is statistically different from the control 0% effluent at the 95% confidence level (MichaelBurov)
abbr., O&G, sakh.	no observed effect concentration The greatest effluent dilution which does not result in lethality that is statistically different from the control (0% effluent) at the 95% confidence level. For discharges, the critical dilution must be equal or less than the NOEC.
abbr., oil	no observed effect concentration