"I tried to grow the virus under very good laboratory conditions in 1951 and it was not possible," he said.

These have half lives ranging from a fraction of a second to a few days, so they are only observed under laboratory conditions.

For this reason most negotiation studies are done under laboratory conditions, and focus only on some aspects.

I did not want him on their side even temporarily and under laboratory conditions.

Under laboratory conditions, female ticks have been kept alive for more than two years.

"But you could ultimately use them to develop a new tooth in laboratory conditions."

"Not if you had time to study them under laboratory conditions."

Put magic under laboratory conditions and it would not respond.

The researchers say more studies are needed under controlled laboratory conditions to test their hypothesis.

"Pakistan carried out the test in cold laboratory conditions, and it was very successful."