It may further be used as {HEAD ~ a support material} in chromatographic materials or {TAIL ~ catalytically active materials} 
It may further be used as { HEAD ~ a support material } in chromatographic materials or { TAIL ~ catalytically active materials }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL