{TAIL ~ The rapid solvent exchange process} is followed by {HEAD ~ depressurization}, optionally with a gas exchange 
{ TAIL ~ The rapid solvent exchange process } is followed by { HEAD ~ depressurization } , optionally with a gas exchange
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH