Xenon

Due to the higher density of xenon compared to air, the speed of sound is slower than in air. This means that when inhaled, it will produce a lower voice pitch [8].

Xenon has been shown to have antiapoptotic activity by inhibiting the apoptotic activation of caspase-3 [6].

Xe(g) is a potent growth inhibitor for Escherichia coli, Saccharomyces cerevisiae, and Tetrahymena thermophila at low pressure [7].