More modest correlations (r = 0.2 0.4) were observed between PM2.5 and SO4, Ca, Cu, Fe, Pb, S, Ti, and V. Table 4 provides a summary of the basic meta-analytic results for alternative single-day lags of pollutant concentrations.
The first technique is called the phase angle method, which consists of applying a sinusoidal ac in the frequency range of 0.1 0.5 Hz to a rotating disk electrode (rde) and measuring the phase lag of the resulting concentration overpotential changes at a given rotational speed.
There were no statistically significant crude associations of FEV1 or FVC with annual or lag 0 concentrations of NO2 or PM10 estimated for addresses geocoded using the building-matching method (p-values > 0.16) (model 0; see Supplemental Material, Table S5).
Bell examined a larger number of communities and utilized same-day (lag 0) PM2.5 concentrations versus the mean of lags 0 and 1 in our study.
Experiments performed according to experimental plans, showed statistically significant influence of Polyox® WSR N60K and sodium chloride concentration on lag time, and concentration of polymer, sodium chloride, mannitol and type of superdisintegrant on Q.
Although our main analysis focused on moving averages, we also assessed the impact of lagged ambient concentrations ranging from 1 to 7 days to confirm our findings.
We also examined restricted distributed lag models (Pope and Schwartz 1996; Schwartz 2000) to evaluate PM effects as a cubic function of lagged daily concentrations within the 7-day averaging period.
Ethnic concentration The lag of proportion of the population of a specific ethnic group to the total population size in a specific region (EC lk. Refer to Section 3.1.2) Note: *These variables are based on the first wave data.
With EC concentrations an immediate (lag of 0 5 hr) borderline decrease of T-wave amplitude could be seen.
As also observed at the optimal pH, the Av1 titration curve at pH 9.5 is not fully hyperbolic and has a "lag" at low concentrations of Av2 (CR < ∼1).
