{TAIL ~ These oxides} can either be coupled to the zeolite by being directly deposited on {HEAD ~ the zeolite} or mechanically mixed with the zeolite 
{ TAIL ~ These oxides } can either be coupled to the zeolite by being directly deposited on { HEAD ~ the zeolite } or mechanically mixed with the zeolite
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH