Zinc and yttrium
نویسندگان
چکیده
Dwarf galaxies are small systems with relatively simple histories. This makes them interesting objects to study a “simple” chemical evolution history. Boötes I belongs to the faintest subclass of dwarf galaxies: ultra-faint dwarf spheroidals, which have very low surface brightness and are dark
منابع مشابه
Preparation of yttrium metal by reduction of yttrium trifluoride with calcium
The preparation of yttrium metal by the reduction of yttrium trifluoride with calcium is described. Alternate methods employing the formation of a low melting Y-Zn or Y-Mg intermediate alloy are evaluated and data on chemical and microscopic purity of the resulting metal are presented.
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