For hourly ozone, the model underestimated concentrations somewhat, with MNB of −25.3% and normalized mean error of 29%.
Model predictions were generally consistent with measured concentrations, especially for PCBs 153 and 180, but overestimated concentrations of PCB-118 and underestimated concentrations of PCB-138.
Laboratory #1 typically overestimated concentrations of uBPA and BPA-G, whereas Laboratory #4, which was not validated for BPA-G, typically underestimated concentrations of this compound.
There was a good correlation between ADMS-modeled levels and monitoring data, suggesting that the modeled values were valid estimates of Cd exposure from the smelter; however, we found that the model underestimated concentrations.
Consistent with the findings in protein-spiked QC samples, the peptide-level calibration resulted in substantially underestimated concentrations in all time-course samples; moreover, for the same set of plasma samples, quantification independently by the two SP resulted in two substantially different sets of concentration time curves.
Some of the differences between the studies may be attributed to the tendency of ASPEN to underestimate concentrations when compared with ambient monitors (U.S. EPA 1996a).
The possibility for underestimating concentrations of some cytokines should be considered, and errors should be estimated by assessing each cytokine recovery in the medium of choice.
Because satellite-based values appear to underestimate concentrations measured by ground-based monitors, it is possible that the proportion of populations living above WHO targets could be higher.
Growth of Carnobacterium is inhibited by acetate, and both MRS and Rogosa agar media significantly underestimate concentrations in food (Leblanc et al., 1997; Sakala et al., 2002; Hammes & Hertel, 2003; Susiluoto et al., 2003; Chenoll et al., 2007).
We were unable to obtain a valid HYSPLIT simulation for June 4th GMT, the first day when the fire became an open flame wildfire, underestimating concentrations on June 4th and the night of June 3rd.
