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