Sentence examples for What concentrations from inspiring English sources

But exactly what foods contain BMAA — or what concentrations could cause problems — has not been thoroughly investigated.

"We may expose a child to a single dose of a drug, and then do a series of blood samples to determine what concentrations are achieved in blood or urine," said Dr. Jeffrey Blumer, chief of the division of pediatric pharmacology at Rainbow Babies and Children's in Cleveland.

Andrew Haines, the chief executive of Britain's Civil Aviation Authority said late Wednesday that periodic ash clouds were likely to disrupt air traffic in the area "for the foreseeable future" as it was still not yet known what concentrations of ash in the atmosphere were safe to fly through.

The E.P.A. is conducting a national study on the drinking water risks associated with hydrofracking, but assessing these risks has been made more difficult by companies' unwillingness to publicly disclose which chemicals and in what concentrations they are used, according to internal e-mails and draft notes of the study plan.

The first step in controlling contaminants is to know as precisely and accurately as possible where they are and at what concentrations they exist.

While such efforts may advance environmental quality, a more fundamental issue is whether adequate consideration has been given to the broader issue of what concentrations of animals means for the rural environment.

Let the Bush administration restudy what concentration of arsenic is acceptable in drinking water.

Rohr listed several of the issues that his further research will seek to resolve, including how long any immunity lasts; whether tadpoles can aquire immunity; what concentration of release of the antigen could confer immunity; and whether such a release could harm any other organisms.

However, we still have no idea about what concentration of nanoparticles causes injury in macrophages.

That will tell me essentially what concentration I started with that would give me that ratio of positive compartments to negative compartments," he says.

Along with the other caveats, she said, without knowing the total amount of oil flowing into the Gulf it's impossible to estimate how much oil might reach the Atlantic, and in what concentration.