Since {TAIL ~ the presence} of H2 in {HEAD ~ the formate synthesis} acts as a diluent, diffusing out the H2 is not necessary 
Since { TAIL ~ the presence } of H2 in { HEAD ~ the formate synthesis } acts as a diluent , diffusing out the H2 is not necessary
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH