Hydrogen is found at concentrations of 61 to 63 percent in pipes connected to the reactor 1 containment vessel.

Institutions were determined to have a special focus with concentrations of at least 80 percent of undergraduate and graduate degrees.

A concentration of 0.10 percent is the legal limit in most states.

"A concentration of around 30 percent is about all you need."

Such 'radiogenic' helium is trapped within natural gas in concentrations of up to seven percent by volume.

Solvent based coatings contain solvents at concentrations of approximately 70 to 75 percent by volume (1).

Currently, everywhere in the country it is illegal to drive with a blood-alcohol concentration of 0.10 percent or higher.

He recommended a concentration of 25 to 50 percent.

When the gas has been diluted in air to a concentration of 5 to 15 percent a spark or an open flame will ignite it.

A concentration of 0.05 percent of ergot is enough to produce symptoms of poisoning.