{TAIL ~ The bismuth} may be present in {HEAD ~ the cathode} 23, 24 in various forms such as Bi4 , BiO2 , Bi metal, Bi3+, and various transient Bi2+ and Bi+ species, depending on the electrode potential 
{ TAIL ~ The bismuth } may be present in { HEAD ~ the cathode } 23 , 24 in various forms such as Bi4 , BiO2 , Bi metal , Bi3 + , and various transient Bi2 + and Bi+ species , depending on the electrode potential
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH