Sentence examples for important contamination from inspiring English sources
The intake of food, especially animal fat and fish, is the most important contamination pathway for humans.
The other important contamination route is through excessive application of agrochemicals that are retained in the unsaturated zone and reach groundwater through irrigation return flow.
Indeed, land application of sewage sludge as well as soil and water contamination from landfills are believed to be the most important contamination pathways for nAg.
The Turda Chemical Plant founded in 1911 and closed more that 15 years ago generated an important contamination of soil with Hg from chlor-alkali electrolysis, but also with other metals such as Cu and Zn.
Although concentration of metals in tailings are too low to be today economically attractive for recovery purpose, some hazardous/priority hazardous metals exhibit an extremely severe enrichment (Ef increases in the order Cd < Pb < Cu < As) compared to the continental crust and can be important contamination sources for soil and sediment.
The maximal amount of total RNA per tube was limited to 4 5 µg because previous experiments showed important contamination levels when using 10 µg.
It is worthy of note that we did not include the well publicized and important groundwater contamination which occurred in Woburn, Massachusetts (where contaminants seeped into the groundwater supply from several industrial sources), due to this latter criterion.
Given that qualification of what is "emerging" is relative, what was emerging as an important environmental contamination issue a decade or two ago, might no longer be qualified as an emerging contaminant.
More important, the contamination we detected in this material is of a type that we would not have expected from samples excavated and processed in Scandinavia, as the allele present in the negative controls is rare in this area (but note that the allele frequencies in the contaminated samples are similar to those known in parts of Asia, where much of the plastic ware and gloves had been produced).
Because both conditions involve dietary interventions that have some subtle but very important differences, contamination and treatment fidelity will be closely monitored.
Heavy metals from natural and anthropogenic sources accumulate in soil and plants and as a consequence represent important environmental contamination problems.
