infusion of two structural analogues of alphaxalone ( 3 alpha-hydroxy-5 alpha pregnane-11,20 dione ) during pressurisation of rats with helium and oxygen gas mixtures ( total pressure 80-100 ata ; inspired oxygen partial pressure 0.5 ata ) ameliorated the severe tremors associated with the high pressure neurological syndrome without any shift in tremor frequency ( 11-14 hz ) .
C0018880
helium
C0019537
high pressure