liberation of gas

He thinks the bright flash seen in the images is from the liberation of gas from liquid, not from a popped bubble.

A Plinian eruption, the explosion caused the liberation of gas, pumice and ash that reached as far as Corvo.

Lactic acid is produced actively without liberation of gas from glucose, fructose, mannose, sucrose, maltose, trehalose, raffinose, inulin, mannitol, sorbitol, and alpha-methylglucoside.

The outlet itself was a gaping hole of over 2 feet across; but by the time its covering had been carefully varnished over all leakage was sufficiently prevented, the one drawback to this method being the fact that the liberation of gas now admitted of no regulation.