Definition: A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN.
Sonazoid [ DD-723,NC100100 ] contrast media containing monodisperse magnetic particles; the particles consist of small crystals of iron oxide, gamma-ferric oxide (gamma-Fe2O) & magnetite (Fe3O4), coating a polymer carrier matrix