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