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