{HEAD ~ The additive} is {TAIL ~ either an ionic additive} or an amine additive which forms an ionic ammonium type salt in the acidic precursor solution 
is
{ HEAD ~ The additive } is { TAIL ~ either an ionic additive } or an amine additive which forms an ionic ammonium type salt in the acidic precursor solution
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH