{HEAD ~ Cobalt oxide} and hydroxide of various oxidation states is {TAIL ~ the preferred material} for encapsulation 
is
{ HEAD ~ Cobalt oxide } and hydroxide of various oxidation states is { TAIL ~ the preferred material } for encapsulation
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH