Sentence examples for at concentrations from inspiring English sources

"We have detected methane at concentrations of 10 parts per billion," says Formisano.

Advanta says testing for biotech material at concentrations of less than 1percentt is technically difficult and expensive.

The material includes thorium, polonium, radium and one product that is much more familiar, radon, but at concentrations hundreds of times higher than in a bad basement.

Recent studies suggest that, even at concentrations meeting current federal standards, the chemical may be associated with birth defects, low birth weights and menstrual problems.

And one study of the canine snout found that it is able to detect scents at concentrations as low as five hundred parts per trillion.

He said that laboratory testing of the discharges found the bacteria, fecal coliform, at concentrations 250 times higher than allowed under state water quality standards.

Reduced lung function growth is also linked to NO2 at concentrations currently measured (or observed) in cities of Europe and North America.

Formaldehyde acts as disinfectant at concentrations as low as 0.1%.

At concentrations < 27 µM, the CI indicated an antagonistic interaction.

N2O strongly decreased adhesions at concentrations of 5% or greater.

Nanomaterials at concentrations 0.0025 mM were used for AFM analysis.