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