Tests have been effected with manganese hydroxide Mg2 and {HEAD ~ other divalent metal ion hydroxides} such as iron, cobalt, nickel, {TAIL ~ copper} and zinc are believed to be suitable 
such as
Tests have been effected with manganese hydroxide Mg2 and { HEAD ~ other divalent metal ion hydroxides } such as iron , cobalt , nickel , { TAIL ~ copper } and zinc are believed to be suitable
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH