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Mostrando ítems 21-30 de 373
Dissolução redutiva de minério de ferro por Acidithiobacillus ferrooxidans para a recuperação de metais de interesse econômicoReductive dissolution of iron ore by Acidithiobacillus ferrooxidans for the recovery of metals of economic interestDisolución reductiva de mineral de hierro por Acidithiobacillus ferrooxidans para la recuperación de metales de interés económico
(Universidade Estadual Paulista (Unesp), 2016)
Modelagem computacional dos defeitos substitucionais na hidroxiapatita
(Pós-Graduação em Física, 2017)
A new fabrication process of pedestal waveguides based on metal dielectric composites of Yb3+ /Er3+ codoped PbO-GeO2 thin films with gold nanoparticles
(Elsevier B.V., 2018-12-01)
This work reports the signal enhancement of Yb3+/Er3+ codoped PbO-GeO2 pedestal waveguides due to gold nanoparticles deposited over the core layer. The pedestal structure was obtained by conventional photolithography and ...
Metallogenetic Systems Associated With Granitoid Magmatism In The Amazonian Craton: An Overview Of The Present Level Of Understanding And Exploration Significance
(PERGAMON-ELSEVIER SCIENCE LTDOXFORD, 2016)
Polímero de coordinación de europio: síntesis y caracterización
(Universidad Autónoma Metropolitana (México). Unidad Azcapotzalco. División de Ciencias Básicas e Ingeniería., 2018)
Los polímeros de coordinación, también conocidos como redes metal orgánicas, son materiales sólidos constituidos por un centro metálico (ácido de Lewis) y un ligante orgánico (base de Lewis). Entre los metales que se ...
Bioreductive Dissolution as a Pretreatment for Recalcitrant Rare-Earth Phosphate Minerals Associated with Lateritic Ores
(Facultad de Ingeniería y Tecnología, 2019)
Recent research has demonstrated the applicability of a biotechnological approach for extracting base metals using acidophilic bacteria that catalyze the reductive dissolution of ferric iron oxides from oxidized ores, using ...
Optical spectroscopy of In-based fluoride glasses doped with Er3+ and Yb3+ ions
(Soc Brasileira Quimica, 1998-07-01)
Optical spectroscopy in the 400-1700nm wavelength range was performed on rare earth doped heavy metal fluoride (HMF) glasses. In the present work In-based fluoride glasses with a fixed 2 mol % YbF3 concentration and an ...
Enrichment method for trace amounts of rare earth elements using chemofiltration and XRF determination
(Springer Verlag Berlín, 2000-10)
A preconcentration method for subsequent determination of rare earth elements (REE) by X-ray fluorescence (XRF) spectrometry was developed. The method is based on using (o-[3,6-disulfo-2-hydroxy-l-naphthylazo]-benzenearsonic ...
Dissolução redutiva de minério de ferro por Acidithiobacillus ferrooxidans para a recuperação de metais de interesse econômico
(Universidade Estadual Paulista (UNESP), 2016)