rare earth
Uptake and Effects of Six Rare Earth Elements (REEs) on Selected Native and Crop Species Growing in Contaminated Soils.
... Rare earth elements (REEs) have become increasingly important metals used in modern technology. Processes including mining, oil refining, discarding of obsolete equipment con- taining REEs, and the use of ...
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Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
... of rare earth ...the rare earth oxides cause a decrease on the amount of Co and Mn atoms segrega- tion at grain boundary during sintering, leading to formation of higher amount of non-active ...
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Rare earth elements, U and Th in tunnel dusts of São Paulo city, Brazil
... Rare Earth Elements (REEs) are a group of metals comprised by the fourteen lanthanide elements, plus yttrium and scandium. They have similar physicochemical properties and are often found to- gether in the ...
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Use of rare earth oxides as tracers to identify sediment source areas for agricultural hillslopes
... Analysis of runoff and sediment transport characteristics for different cultivation types for three events monitored at Loddington during the rare earth oxide tracing experiment using GLM analysis indicates ...
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Rare Earth Elements and Geochemical Partitioning of Zn and Pb in Sediments of an Urban River
... on Rare Earth Elements (REEs) and geochemical partitioning of Zn and Pb in sediments of 19 sampling sites of Nomi River in order to examine the mobility ...
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Pump-probe technique for excited state absorption and stimulated emission measurements in rare earth ion doped solid materials.
... IN RARE EARTH ION DOPED SOLID MATERIALS. Rare earth ion doped solid state materials are the most important active media of near-infrared and visible lasers and other photonic ...the ...
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LIQUID PHASE SYNTHESIS METHODOLOGIES FOR THE OBTAINMENT OF RARE EARTH-BASED INORGANIC NANOMATERIALS.
... LIQUID PHASE SYNTHESIS METHODOLOGIES FOR THE OBTAINMENT OF RARE EARTH-BASED INORGANIC NANOMATERIALS. Liquid phase synthesis techniques are commonly preferred for the preparation of nanosized inorganic ...
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Recovery and separation of rare Earth elements using salmon milt.
... Rare earth elements (REEs) have been used in various advanced materials, including catalysts, alloys, magnets, optics, and lasers, for more than a decade ...other rare metals ...
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Photoluminescence studies in rare earth ions coordinated by a carbazolic derivative.
... Para o complexo de Gd 3+ , as curvas de intensidade de emissão do ligante em função do tempo foram ajustadas a decaimentos biexponenciais, indicando que o Gd 3+ pode estar [r] ...
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Contribuition to the study of an alternative methodology for the obtention of rare earth oxysufides.
... Entre 790 – 950 o C ocorre a decomposição térmica numa etapa rápida de perda de massa não apresentando ao término do evento nenhum pata- mar indicativo da formação de um intermediário te[r] ...
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Infrared and Raman spectroscopic characterization of the carbonate mineral huanghoite – And in comparison with selected rare earth carbonates
... Multiple bands are observed in the OH stretching region for bastnasite and parisite indicating the presence of water and OH units in their mineral structure.. Vibrational spectroscopy en[r] ...
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Synthesis, characterization and thermal behavior of rare earth amidosulfonates.
... Os amidossulfonatos de lantanídeos foram preparados através da reação direta entre uma suspensão aquosa dos hidroxicarbonatos e o ácido amidossulfônico, sob aquecimento e agitação cons[r] ...
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Rev. Esc. Minas vol.69 número1
... Rare earth metal (REM) reserves have been discovered in 34 countries – from these, 15 in Asia and Australasia, 10 in Africa, six in Europe and three in America (Chen ...Most rare earth metals ...
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Mat. Res. vol.15 número4
... On-line ultrasonic velocity measurement as a function of temperature determines the T c in perovskites. T c that is observed with a decrease in the ionic radii of the rare earth elements decreases as ...
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Brazil. J. Polit. Econ. vol.37 número3
... control rare earth exports marks a turning point in the international supply of these raw materials, as well as in the division of labor be- tween China and more advanced countries in renewable energy, ...
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J. Braz. Chem. Soc. vol.28 número12
... the rare earth complexes, neutral ligands such as heteroaromatic and phosphine oxide ligands have been not only used for this purpose, but have been shown that they may also play an essential role in the ...
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Surface-plasmon-enhanced frequency upconversion in Pr(3+) doped tellurium-oxide glasses containing silver nanoparticles
... In conclusion, we remark that a comparison between the optical absorption spectra and the luminescence results illus- trates the larger sensitivity of the UC process to changes in the environment of the rare ...
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Mat. Res. vol.20 número5
... Magnetite was doped with rare earth ions (europium) to produce core-shell materials with both magnetic and luminescent properties, i.e., a magnetic Fe 3 O 4 oxide core and a SiO 2 :phe[r] ...
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Quím. Nova vol.26 número6
... be absorbed by E b ). However they are commonly treated as adjustable parameters, for which the input data are the experimentally observed energies of the baricenters of the J manifolds. The great advantage of this ...
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J. Braz. Chem. Soc. vol.28 número10
... All solutions were prepared using deionized water purified by a Milli-Q system (Millipore, Bedford, MA, USA). A Mars 6 microwave oven (Cem, Matthews, NC, USA) was applied for decomposing the flower herb tea samples. A ...
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