The method 8 wherein said reducing {HEAD ~ agent} is selected from {TAIL ~ the group} consisting of activated carbon, graphite powders, charcoal powders, ash powders, oil, paraffin, tar, pitch, and mixtures thereof 
is selected from
The method 8 wherein said reducing { HEAD ~ agent } is selected from { TAIL ~ the group } consisting of activated carbon , graphite powders , charcoal powders , ash powders , oil , paraffin , tar , pitch , and mixtures thereof
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH OTH OTH