BCFs, bioconcentration factors

BCF = bioconcentration factor, 270 L/kg for alpha-, beta-endosulfan, and endosulfan sulfate WCR = water consumption rate, set at 2 L/day... 

ATSDR Agency for Toxic Substances and Disease Registry BCF bioconcentration factor... 

BCF = bioconcentration factor MATC = maximum acceptable toxicant concentration. Lower value in each MATC pair indicates highest concentration tested producing no measurable effect on growth, survival, reproduction, and metabolic upset during chronic exposure higher value indicates lowest concentration tested producing a measurable effect. 

BCF = bioconcentration factor HpCDD = heptachlorodibenzo-p-dioxin HxCDD = hexachlorodibenzo-p-dioxin OCDD = octachlorodibenzo-p-dioxin PeCDD = pentachlorodibenzo-p-dioxin TCDD = tetrachlorodibenzo-p-dioxin... 

In contrast to log BCF- (bioconcentration factor) log Kow correlations (Meylan et al., 1999), no falloff in log Koc values appears to be observed for highly hydrophobic chemicals, and no biphasic QSARs based on log Kow appear to have been published. This suggests that equilibrium, or at least quasi-equilibrium, is generally achieved within the timescale of the determination of Koc. In addition,... 

BCF Bioconcentration factor on a wet weight basis. BCFl Bioconcentration factor on a lipid basis. 

The evaluation of the results from the environmental fate leads to a predicted environmental concentration (PEC) of the pesticide representing the exposure level. The accumulation in the food chain of fish is expressed as BAF ( bioaccumulation factor in aquatic environment), that of mammals and birds as BCF (bioconcentration factor in terrestrial environment). Accumulation increases the exposure. The NOAEL (no observed adverse effect level) represents the hazard level. It is the result... 

---