The concentrate is separated by {HEAD ~ centrifugation} into a cell concentrate and {TAIL ~ a clarified broth} containing the aroma and flavor materials 
into
The concentrate is separated by { HEAD ~ centrifugation } into a cell concentrate and { TAIL ~ a clarified broth } containing the aroma and flavor materials
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH