{TAIL ~ The carbodiimide} can promote the formation of {HEAD ~ crosslinks} between carboxylate and amine groups of the polyelectrolytes 
{ TAIL ~ The carbodiimide } can promote the formation of { HEAD ~ crosslinks } between carboxylate and amine groups of the polyelectrolytes
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH