{HEAD ~ a hydrogen sensitive dye} disposed in or placed on {TAIL ~ said container}, said hydrogen sensitive dye outputting a detectable signal in response to a presence or absence of said molecular hydrogen 
placed on
{ HEAD ~ a hydrogen sensitive dye } disposed in or placed on { TAIL ~ said container } , said hydrogen sensitive dye outputting a detectable signal in response to a presence or absence of said molecular hydrogen
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH