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Indústria de pedras preciosas: um estudo dos fatores competitivos em empresas de Soledade - RS
(Universidade Federal de Santa MariaBRAdministraçãoUFSMPrograma de Pós-Graduação em Administração, 2005-04-25)
To remain competitive, companies are supposed to know the internal and external factors that
are present in their sector and global reality, obtaining information that allow them to
formulate strategies in order to stay ...
El rugoso carrusel metálico del dólar y el oro
(América EconomíaCL, 2019)
En el caso de los metales preciosos (oro, plata, platino y similares), el mercado es distinto y su precio solo se compone por la oferta y demanda de los bancos centrales (europeos, americanos y asiáticos), además de las ...
Simultaneous determination of Au(III) and Cu(II) with 1-phenyl-1,2-propanedione-2-oximethiosemicarbazone (PPDOT) on solid phase
(2007)
A new method for the simultaneous determination of copper and gold was developed by derivative spectrophotometry using a previous preconcentration on solid phase. The method is based on the formation of Cu(II)-PPDOT and ...
Análise econômica do mercado de pedras preciosas na região do Médio Alto Uruguai do estado do Rio Grande do Sul
(Universidade Federal de Santa MariaBrasilAgronomiaUFSMPrograma de Pós-Graduação em Extensão RuralCentro de Ciências Rurais, 2018-06-22)
Brazil is one of the highlights in mineral production, possessing in its territory a great quantity and variety of
precious stones, being one of the traditional sectors of the Brazilian economy and that receives ...
Phase Relations, Precious Elements Distribution, and Activities in the Cu-Fe-Pb-As System Saturated with Carbon at 1473 K (1200 C)
(The Minerals, Metals & Materials Society and ASM International, 2015-04)
In order to develop a new pyrometallurgical process for the elimination of detrimental arsenic
and the recovery of precious elements, such as, silver, gold, and platinum from arsenic-rich
copper-lead scraps, the phase ...
Modern hot springs in the southern volcanic Cordillera of Peru and their relationship to Neogene epithermal precious-metal deposits
(ElsevierNL, 2001-09)
Modern hot springs associated with surface precipitates and acid alteration exist in several areas of the Southern Volcanic Cordillera of Peru. The hot springs are related to continental geothermal systems, which formed ...