{TAIL ~ An apparatus} is disclosed that allows for separating and collecting {HEAD ~ a fraction} of a sample 
{ TAIL ~ An apparatus } is disclosed that allows for separating and collecting { HEAD ~ a fraction } of a sample
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH