rare earth oxides. he isolated two new oxides, which eventually led to the identification and naming of the elements holmium and thulium. thulium is named after thule, scandinavia. despite being very rare and expensive, thulium has several commercial uses. notably, it is used as a dopant for garnets...
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praseodymium and neodymium . praseodymium salts are yellow-green in solution, leading to the naming of the compound from the greek word prasinos, meaning green, and the previously chosen root didymos, meaning twin. like many of the rare earth elements , praseodymium is used primarily in small amounts...
نويسنده , issue information : روزنامه با شماره پیاپی سال pages : from page : to page : abstract : infectious coryza is a well-recognized and commonly encountered upper respiratory tract disease of chickens that is caused by the bacterium haemophilus paragallinarum. the occurrence of recent outbreaks...
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