Sentence examples for pollutant over time from inspiring English sources

Continuous sampling allows a researcher to measure concentrations of a pollutant over time and provides the flexibility to categorize data into time periods of interest.

Assuming immediate and 100% absorption through all routes for a single-compartment linear model, the change in the amount of pollutant over time in the compartment can be expressed as follows: where P t is the amount of pollutant in the compartment, and k is the first-order biologic elimination constant, calculated by 0.693/ T1/2 (T1/2 is the biologic half-life) (Schoenwald 2001).

Though most of such compounds are non-toxic to humans, accumulation of such micro-pollutants over time in a closed loop system may be a problem.

However, there are countervailing influences, including significantly (presumably) lower per-vehicle emissions of multiple pollutants over time.

In addition, there was significant correlation between adjusted FEV1 and FEV1/FVC ratio and averaged air pollutants over time (table E in appendix 3 on bmj.com).

The maps are on different scales due to the large differences in concentrations of both pollutants over time, therefore not directly comparable.

These types of methods may also be valuable in understanding why changes are observed in the magnitude of risks associated with individual pollutants over time.

An important but often overlooked aspect of most toxicological studies aimed at identifying health risks is the fact that assessment of the effects of a single compound can be misleading since individuals are typically exposed to multiple pollutants over time.

6 19 20 21 In addition, despite there being a correlation between adjusted FEV1 and air pollutants over time (table E in appendix 3 on bmj.com), we could not further confirm the correlation of annual rate of decline in FEV1 and change of outdoor air quality because we recruited only two communities.

The researchers used airport visibility measurements (for PM2.5 only) and data from state-run air pollution monitors (for all other pollutants) to estimate pollutant levels over time for the zip code centroids of participants' work sites and residences.

CO is a reliable surrogate for fine particles and is easier to measure over time than other pollutants, according to Smith.