The devices comprise a body formed of {HEAD ~ a polymeric backbone} having {TAIL ~ a repeating unit} of a hydrocarbon radical and symmetrical dioxycarbon unit with a multiplicity of organic groups bonded thereto 
The devices comprise a body formed of { HEAD ~ a polymeric backbone } having { TAIL ~ a repeating unit } of a hydrocarbon radical and symmetrical dioxycarbon unit with a multiplicity of organic groups bonded thereto
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH