They found high concentrations of small and middle sized drops regardless if larger drops were present.

They also found high concentrations in pomegranate oil and juice.

I had often found concentrations of blues at that spot.

At Wooster, which had the higher levels, tests found concentrations of 11 parts per trillion.

We also found lower concentrations in smokers although this did not reach significance.

Spectrum telescopes had not even found concentrations of ship's metals in the space where they have vanished.

Wherever you find concentrations of foxes in urban areas, the hedgehog population drops dramatically.

A recent study found higher urinary concentrations in young children than in adults under typical exposure scenarios.

Where do you find concentrations of bright, flickering lights?

Nor is he able to find dangerous concentrations in water samples.