The oligodynamic metal used in accordance with the invention is typically {HEAD ~ a heavy metal} such as copper, silver, {TAIL ~ gold} or their alloys including intermetallic compounds thereof 
such as
The oligodynamic metal used in accordance with the invention is typically { HEAD ~ a heavy metal } such as copper , silver , { TAIL ~ gold } or their alloys including intermetallic compounds thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH