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