Pesquisa sobre: METALS, RARE EARTH 
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Descritor Inglês:   Metals, Rare Earth 
Descritor Espanhol:   Metales de Tierras Raras 
Descritor Português:   Metais Terras Raras 
Sinônimos Inglês:   Earth Metals, Rare
Rare Earth Metals  
Categoria:   D01.268.558
Definição Inglês:   A group of elements that include SCANDIUM; YTTRIUM; and the LANTHANOID SERIES ELEMENTS. Historically, the rare earth metals got their name from the fact that they were never found in their pure elemental form, but as an oxide. In addition they were very difficult to purify. They are not truly rare and comprise about 25% of the metals in the earth's crust. 
Nota de Indexação Inglês:   GEN: prefer specifics
Nota Histórica Inglês:   76; was NON MESH before 1976 
Qualificadores Permitidos Inglês:  
AD administration & dosage AE adverse effects
AG agonists AN analysis
AI antagonists & inhibitors BL blood
CF cerebrospinal fluid CS chemical synthesis
CH chemistry CL classification
EC economics HI history
IM immunology IP isolation & purification
ME metabolism PK pharmacokinetics
PD pharmacology PO poisoning
RE radiation effects ST standards
SD supply & distribution TU therapeutic use
TO toxicity UR urine
Número do Registro:   8850 
Identificador Único:   D008674 

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