LOEC lowest observed effects

SPY sulfapyridine, SDZ sulfadiazine, SMX sulfamethoxazole, SMZ sulfamethazine, SCP sulfachloropyridazine, STZ sulfathiazole, SCT sulfacetamide, AcSMX N -acetylsulfamethoxazole, AcSDM N -acetylsulfadimethoxine, AcSDZ N -acetylsulfadiazine, EC50 Median effective concentration (mg/L), LC50 Median lethal concentration (mg/L), NOEC No-observed-effect concentration (mg/L) LOEC lowest-observed-effect concentration (mg/L), h hours, min minutes, d days... 

ISWMP Integrated Solid Waste Management Plans LOEC Lowest observed effect concentration L/S liquid to solid ratio... 

LOEC — Lowest observed effects concentration determined by statistical hypothesis testing methods. 

Note TOC = total organic carbon (% of dry weight), NOEC = no observed effect concentration, LOEC = lowest observed effect concentration, ND = not determined due to insufficient mortality, BDL = below detection limit. NOEC and LOEC are reported as measured sum concentrations of parent and transformation products at experiment initiation. Effects were significant reductions in survival. 

The LOEC (lowest observed effect concentration), or threshold level of observed effects, is the lowest test concentration at which a substance is observed to have a statistically significant and unequivocal effect on the test species. The NOEC (no observed effect concentration) is the highest tested concentration below the LOEC where the stated effect was not observed. A chronic toxicity test may include more than one generation of the test organism. 

LOEC lowest observed effect concentration. The lowest experimentally determined concentration of a test substance at which adverse effects can be observed... 

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