slowly dropping a monomer into {HEAD ~ the water} and dissolving the same to introduce {TAIL ~ the monomer} into the micells 
slowly dropping a monomer into { HEAD ~ the water } and dissolving the same to introduce { TAIL ~ the monomer } into the micells
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH