Sentence examples for levels the substance from inspiring English sources

At low levels the substance damages the sense of smell, so vast numbers of people could be exposed to dangerous levels of the gas without realising it.

Munro et al. (1996) proposed that if exposures were below this level, the substance could be evaluated using fewer toxicological testing data because the most toxic fifth percentile of other similar chemicals did not show health effects at exposures 100-fold higher.

15 All recorded medications were coded into the corresponding Anatomical Therapeutic Chemical (ATC) codes at the ATC 5th level (ie, the substance level) whenever possible, otherwise into the 2nd 4th levels as appropriate, in accordance with the WHO ATC index.

That discovery eventually led to the development of the P.S.A. test; high levels of the substance can point to the presence of prostate cancer at an early stage.

Mercury levels there have for decades been linked to industrial pollution but recent research from Nasa has suggested that declining levels of sea ice in the region could be helping to push up levels of the substance.

As many as 700,000 New Jersey residents are drinking water that is contaminated with dangerously high levels of arsenic, according to a coalition of environmentalists that is trying to force the state to tighten acceptable levels of the substance, a known carcinogen.

Products from other large dairy firms showed lower levels of the substance.

A 2008 study found that a serving of dark meat from turkey elevated levels of the substance in subjects' blood.

Endorphins first gained notoriety in exercise back in the 1980s when researchers discovered increased blood levels of the substance after prolonged workouts.

League officials say that players using stimulants on game days can still be caught on tests the day after because lower levels of the substance will still be considered a positive test.

America has been adding fluoride to its public water supplies for decades, based on overwhelming evidence that even low levels of the substance can significantly reduce tooth decay, with no major side effects.