Scientists sometimes debate whether specific activities release measurable levels of endorphins.

For the participants who had a measurable level of Truvada in their blood, the efficacy increased to an astonishing 92 percent.

There are measurable levels of chemical pollutants and little is known about their effects.

Sobriety is the condition of not having any measurable levels, or effects from mood-altering drugs.

The study did not show measurable systemic levels or hematopoietic side effects, suggesting potential for use in humans.

In the thimerosal-free control group, only one baby had even a measurable level of mercury.

The output, which is the remaining signal after the fundamental has been suppressed, is amplified to a measurable level.

It is such measurable levels of activity over a given time period however which provide a means of support and comparison.