{HEAD ~ An increase} in zinc from about 23% to about 28 30% results in {TAIL ~ markedly higher electrical conductivity} 
results in
{ HEAD ~ An increase } in zinc from about 23 % to about 28 30 % results in { TAIL ~ markedly higher electrical conductivity }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL