The chemical problems were interesting, but the biological tests were all negative, and there were more urgent jobs to be done.

Kilham's lab was compromised by a terrorist attack during a tricky biological test.

There are biological and chemical tests, too.

It was three days before the biological tests showed that it would be safe to leave the ship.

For example, the "Southern blot" is named for the inventor of this key molecular biological test.

There's a wide range of possible explanations, however, and doctors are generally able to pinpoint your problem through biological and psychological tests.

However, the general scientific community surmise that the Viking's biological tests remain inconclusive.

No differences between the groups were found, however, in biological tests.

The previous Viking landers conducted biological tests, which failed to detect any unambiguous evidence of life.

He took a prominent part in a number of biological tests regarding space flight projects.