They are semipermeable and useful in the separation of {HEAD ~ different chemical species} by osmosis, dialysis, electrodialysis and {TAIL ~ reverse osmosis} 
by
They are semipermeable and useful in the separation of { HEAD ~ different chemical species } by osmosis , dialysis , electrodialysis and { TAIL ~ reverse osmosis }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL