A high degree of oral bioavailability was preferred because low bioavailability is generally associated with more variable exposures.
In large-scale field studies, in which the bees are placed near treated crops to forage the bees may have lower and more variable pesticide exposure than in studies where bees are fed with an artificial feed, with pesticide added at "field realistic" levels and this may explain why the former studies often find less damaging effects.
However, because exposures to coarse particles are more variable than exposures to smaller particles within cities (Wilson and Suh 1997), our results for PNC2.5 10, which were based on data from a single monitoring site, should be interpreted with caution.
This will provide more variable estimates of exposure and potentially allow for more accurate and precise estimates of the cardiovascular risks of outdoor-generated PM2.5.
ICCs decreased slightly at 14 months of age, perhaps indicating more variable sources of exposure during diet transition to more solid foods and to a more active and exploratory lifestyle, including mouthing of toys and objects.
As rural areas tend to have generally higher and more variable levels of arsenic exposure, it is possible that arsenic exposure may be associated with more aggressive disease and earlier death producing a bias for the overall association between arsenic exposure and bladder cancer toward the null.
Tmax and Tlag were significantly more variable than the two exposure parameters; Cmax, mean residence time and total area under the curve (AUC=4039.7±583.8 ng/mL×h) which had a coefficient of variation of <20%.
Because of lower and more variable temperatures at high latitudes, intermittent exposure may constitute a larger fraction of the total exposure in the south than in the north.
Therefore exposures of the airway epithelium are more variable and can be much higher than exposures of viable cells of the skin or the gastro-intestinal tract at similar concentrations in the ambient environment.
However, the overall impression is that algae are more variable in their sensitivity to AS exposure compared to fish and invertebrates.
