The extractable material is removed by first dissolving it in {TAIL ~ a liquid} which is not a solvent for {HEAD ~ the matrix forming material} to form a solution 
The extractable material is removed by first dissolving it in { TAIL ~ a liquid } which is not a solvent for { HEAD ~ the matrix forming material } to form a solution
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH