If desired, the DMSO or ethanol can be washed out of the system, leaving {TAIL ~ an aqueous gel} containing {HEAD ~ the small drug particles} 
If desired , the DMSO or ethanol can be washed out of the system , leaving { TAIL ~ an aqueous gel } containing { HEAD ~ the small drug particles }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD