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1. Helium product
1.1 A brief history of helium
Helium makes up almost a quarter of the mass of matter in the Universe. However, it was not discovered until 1868, in the Sun's chromosphere, simultaneously and independently, by two Americans: J.N. Lockyer and P.J. Jansen. The name helium comes from the Greek word "helios", meaning "sun". Some helium-related values are listed in table 1 .
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Helium product
Helium purification
