{HEAD ~ The activated membrane} can be made of {TAIL ~ a polysulfone/polyacrolein mixture} or a polysulfone microporous membrane treated with a polyacrolein solution 
made of
{ HEAD ~ The activated membrane } can be made of { TAIL ~ a polysulfone / polyacrolein mixture } or a polysulfone microporous membrane treated with a polyacrolein solution
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH