Sentence examples for activity has occurred from inspiring English sources

The proteases of the contact system circulate in the blood as zymogens, and after contact activation have been initiated and enzyme activity has occurred, the enzymes quickly form complexes with their inhibitors, making it very difficult to measure free contact enzymes in plasma (Additional file 1: Figure S1).

"We still don't quite understand the Oct. 31 date, since substantial activity has occurred since," Mr. Koutoulas asks.

Volcanic activity has occurred within the Moon, but the results are mostly quite different from those on Earth.

The acceleration in activity has occurred over the last six months, with smaller lenders jumping into the fray, said Melissa Cohn, the chief executive of the Manhattan Mortgage Company, a large mortgage broker.

The abundance of volcanic rocks of Archean age is indicative of the continuing role of intense volcanic degassing, but since early in the Proterozoic Eon (2.5 billion to 541 million years ago) much less volcanic activity has occurred.

As a result, these data indicate that volcanic activity has occurred on at least two separate occasions in this region.

The highest tree density (1,358 trees ha-1) was found in CJ73, where no thinning activity had occurred.

With environmental sampling, officials close to the agency said, it would not be hard to determine whether nuclear activity had occurred there.

The department said 23 of the 2,123 reports detailed "critical" incidents, where life or serious injury was at risk, or serious violence, sexual assault or criminal activity had occurred.

Through early 1990, a total of at least 21 periods of eruptive activity had occurred.

Greywackes are poorly sorted mixtures of clay, mica and quartz that may be derived from the decomposition of pyroclastic debris; the presence of this debris suggests that some explosive volcanic activity had occurred in the area earlier.