Sentences with phrase «lower background concentrations»

Not exact matches

In order to evaluate the assessment of the low emission zone, the scientists determined the reduction of tailpipe emissions of black carbon and ultrafine particles at a street - site by taking into account the concentrations measured in the urban background.

Low background atmospheric concentrations, together with well - known and often distinct isotopic characteristics (variants of lead with different atomic weights) of industrial sources make lead an ideal tracer of industrial pollution.

BACKGROUND OR LOW - LEVEL noise in the home, work or school often disrupts people's concentration.

However, pregnant women have very low concentrations of pertussis antibodies to transfer to their newborn at the time of delivery; maternal immunization with the Tdap vaccine could help prevent infant pertussis, according to background information in the article.

Early transient hypoglycemia is defined as occurring within the first three hours of life and it involves a single low glucose concentration followed by a second value above a cutoff, according to the study background.

At the moment, concentrations of plutonium in waters off Fukushima are so low that background radiation from nuclear weapons testing more than 50 years ago makes the signal undetectable with our instruments.

Keep in mind that small amounts really count, particularly in regions with low natural background concentrations (as already mentioned).