Female Harlan Sprague-Dawley rats were exposed for 13 weeks to toxicologically equivalent doses of four different HAHs based on the toxic equivalency factor of each chemical: TCDD (100 ng/kg/day), 2,3,4,7,8-pentachlorodibenzofuran (PeCDF; 200 ng/kg/day), 3,3′,4,4′,5-pentachlorobiphenyl (PCB126; 1,000 ng/kg/day), or 2,2′,4,4′,5,5′-hexachlorobiphenyl (PCB153; 1,000 μg/kg/day).
Currently, risk assessment of DLCs is based on the toxic equivalency factor (TEF) approach (Safe 1990 , 1994 endorsed by the World Health Organization (WHO) (Van den Berg et al. 1998, 2006).
Morphine equivalents (ME) were calculated for each prescription based on the Canadian Guideline for Safe and Effective Use of Opioids for Chronic Non-Cancer Pain morphine equivalency table (National Opioid Use Guideline Group NOUGGG) [ 2011].
A lightfastness equivalency for each paint or ink was assigned based on the sample's similarity to fading curves for BWS1 3.
Toxic equivalency factors (TEFs) were calculated using the 2006 TEF values [45] and based on the concentrations of the 5 dioxin-like PCB congeners that were analyzed in this study.
A recent study comparing citrate 30% and heparin reported no differences in catheter flow problems and thrombosis, however there was a significant reduction in catheter related bacteremia for the citrate arm [ 12]. Conclusions regarding superiority, or even equivalency, of heparin and citrate for catheter patency can not be made based on the available evidence.
We developed consumption levels based on the tolerable daily intake (TDI) of the World Health Organization (WHO 1998), which assesses dioxin health risks via a toxicity equivalency (TEQ) approach that characterizes dioxins and DLCs as 17 2,3,7,8-substituted 2,3,7,8-substitutedenzodioxins (polychlorinatedchlorinatedibenzodioxinss (PCDDs), and the 12 non- ortho and mono- ortho polychlorinated
Exposure and response data in this effort are based on the most commonly used metric in such studies: serum lipid concentration of TCDD TEQs as estimated using the WHO toxic equivalency factors (TEFs) (van den Berg et al. 1998, 2006).
The new method is based on the establishment of damage contour lines which are used to determine the sea-state parameters that ensure simultaneous compliance with damage equivalency criterions at different locations within the offshore wind turbine.
