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