Barium

Barium (Barium, from Greek barys heavy) – chemical element II of group of periodic system of elements of D. I. Mendeleyev, atomic number 56, chemical designation of Wa, atomic mass 137,34; treats microelements and is a part of all fabrics and bodies; insoluble sulfate salt of barium thanks to high ability to absorption of x-ray emission is used at radiological methods of a research of a digestive tract as a contrast agent; soluble salts of barium are toxic.

 
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The 74-year-old resident of Australia James Harrison became blood donor about 1000 times. It has a rare blood group which antibodies help to survive the newborn with a severe form of anemia. Thus, the Australian saved about two million children.