Magnetite particles 1, wherein {HEAD ~ the specific surface area} of {TAIL ~ the magnetite particles} by the BET method is given by the equation 
of
Magnetite particles 1 , wherein { HEAD ~ the specific surface area } of { TAIL ~ the magnetite particles } by the BET method is given by the equation
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH