TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
effect concentration [1 record]
Record 1 - internal organization data 2004-02-16
Record 1, English
Record 1, Subject field(s)
- Environmental Studies and Analyses
- Toxicology
Record 1, Main entry term, English
- effect concentration
1, record 1, English, effect%20concentration
correct
Record 1, Abbreviations, English
- EC 1, record 1, English, EC
correct
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 OBS
EC; effect concentration: This [toxicological value] is generally followed by a number, which indicates the percentage of a population which experience the effect. 2, record 1, English, - effect%20concentration
Record number: 1, Textual support number: 2 OBS
Typical levels are EC 10, EC 25, EC 50, EC 75, EC 100. NOEC: No observable effect concentration; LOEC: Lowest observable effect concentration. 3, record 1, English, - effect%20concentration
Record number: 1, Textual support number: 1 CONT
Developing Hormosira banksii embryos, used as bioassays in toxicity studies, identified ammonium as a toxicant in secondary treated sewage effluent discharged at Boags Rocks, Victoria, Australia. Ammonium did not affect fertilization but had a significant effect on germination at 48 h and cell division at 72 h with most damage occurring in the first 48 h. Ammonium showed a similar effect as whole effluent (when expressed as mg N l-1 ammonium), sampled in June, September and November 1997, on developing H. banksii embryos. This similarity is further confirmed with comparable EC50 (concentration causing an effect on 50% of the population tested) and LOEC (lowest observable effect concentration) values. Mean EC50 values for the ammonium bioassays were 3.19 mg N l-1 for germination and 6.14 mg N l-1 for cell division. 4, record 1, English, - effect%20concentration
Record number: 1, Textual support number: 1 PHR
Effect concentration low (ECL), median effect concentration (EC50), lowest observable effect concentration (LOEC), no-observed-effect concentration (NOEC), threshold effect concentration (TEC). 5, record 1, English, - effect%20concentration
Record 1, French
Record 1, Domaine(s)
- Études et analyses environnementales
- Toxicologie
Record 1, Main entry term, French
- concentration effective
1, record 1, French, concentration%20effective
correct, feminine noun
Record 1, Abbreviations, French
- CE 1, record 1, French, CE
correct, feminine noun
Record 1, Synonyms, French
- concentration entraînant un effet 2, record 1, French, concentration%20entra%C3%AEnant%20un%20effet
feminine noun
- concentration produisant un effet 3, record 1, French, concentration%20produisant%20un%20effet
feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Concentration entraînant un effet à long terme. 2, record 1, French, - concentration%20effective
Record number: 1, Textual support number: 2 CONT
Concentration minimale produisant un effet. 3, record 1, French, - concentration%20effective
Record number: 1, Textual support number: 3 CONT
Évaluation du rapport dose (concentration)-réponse (effet). L'objectif est de déterminer la concentration en dessous de laquelle la substance ne devrait pas avoir d'effets indésirables sur la composante de l'environnement considérée. Cette concentration est dénommée concentration prévue sans effet (PNEC). Toutefois, il se peut que dans certains cas il ne soit pas possible d'établir une PNEC et il faut alors effectuer une estimation qualitative de la relation dose (concentration)-réponse (effet). Pour calculer la PNEC, on peut appliquer un facteur d'évaluation aux valeurs provenant des essais effectués sur les organismes, par exemple à la DL50 (dose létale médiane), à la CL50 (concentration létale médiane), à la CE50 (concentration effective médiane), à la CI50 (concentration provoquant cinquante pour cent d'inhibition d'un paramètre donné, par exemple la croissance), au NOEL(C) (dose (concentration) sans effet observé), au LOEL(C) (dose (concentration) entraînant l'effet observé le plus faible) ou d'autres méthodes appropriées. 4, record 1, French, - concentration%20effective
Record 1, Spanish
Record 1, Textual support, Spanish
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