Thus, assuming that the drinking-water supply is the only significant source of exposure to perchlorate or other inhibitors of the thyroidal uptake of iodide, a perchlorate concentration of 180-220 ppb (and possibly much higher) should be of no health concern in iodine-sufficient populations.
Despite significant inhibition of thyroidal radioiodine uptake in the 0.
A downward trend in TSH is the reverse of what is expected when iodide uptake is blocked or iodine nutrition is insufficient (41).
The cytotoxicity of [beta]-lg nanoparticles in Caco-2 cells were determined by measuring the cell survival ratio using flow cytometry prior to cellular uptake study (Figure 3).
The in vitro or in vivo cellular uptake of nanoparticles was investigated by the use of fluorescent-based method (Win and Feng, 2005).
It is believed that the cellular uptake of nanoparticles was affected by various morphological- and physicochemical properties of nanoparticles, such as their size and surface charge (Mansouri et al.
Uptake ratio of calcium content (compared to soil).
Uptake ratio of sodium and potassium content (compared to soil).
Uptake ratio of total cation content (compared to soil).
The extent to which this happens depends on the relation between the exposure index that is used and the "true exposure," which in this context is the relation between the mean chloroform concentration of the water zone in which a mother resides and her average uptake of chloroform, respectively.
A number of studies have measured an individual's uptake of DBPs from various activities, using biologic markers such as breath samples, blood plasma samples, and urinary excretion rates (Nieuwenhuijsen et al.
Uptake of chloroform was simulated based on information in the published literature about frequency and duration of each activity, amount of water ingested, and measured increases in blood chloroform concentrations.