Ytterbium
Mostrando 13-17 de 17 artigos, teses e dissertações.
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13. "Investigação de Lasers de fluoreto dopados com Túlio e bombeados por diodo-Laser" / INVESTIGATION OF DIODE-LASER PUMPED THULIUM-DOPED FLUORIDE LASERS
Lasers sintonizáveis ao redor de 2,3 μm são interessantes para várias áreas, como detecção de gases, sensoriamento remoto e aplicações médicas. O túlio é o principal sistema entre os lasers de terras-raras com essa emissão e pode ser bombeado diretamente ou por meio de um sensibilizador como o itérbio. Neste trabalho, apresenta-se a obtenç
Publicado em: 2006
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14. "Avaliação de diferentes marcadores para a determinação da digestibilidade e taxa de passagem do alimento em suínos" / Use of different markers for determining apparent digestibility and rate of passage in swine
The aim of this work was (1) to evaluate the use of chromic oxide, lanthanum and ytterbium as indigestible markers for the measurement of apparent digestibility in finishing pigs, (2) to determine the rate of passage of feed and (3) to compare two analytical techniques (ICP-OES and ED-XRF). In the digestibility assay, 12 finishing gilts was used. The treatme
Publicado em: 2002
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15. Thermal effects on light emission in Yb3+-sensitized rare-earth doped optical glasses
The temperature effect upon infrared-to-visible frequency upconversion fluorescence emission in off-resonance infrared excited Yb3+-sensitized rare-earth doped optical glasses is theoretically and experimentally investigated. We have examined samples of Er3+/Yb3+-codoped Ga2S3:La2O3 chalcogenide glasses and germanosilicate optical fibers, and Ga2O3:La2O3 cha
Brazilian Journal of Physics. Publicado em: 2001-03
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16. Dynamic of optical nonlinearities in macromolecules and oligomers / Dinâmica de não linearidades ópticas em macromoléculas e oligômeros
This work reports the dynamic nonlinear optical properties of organic compounds, namely, ytterbium bis-phthalocyanine, furfuryl alcohol derivatives and azo-aromatic compounds. In order to carry out this investigation we developed an experimental extension to the standard Z-scan technique, named Z-scan with pulse trains. In this method, pulse trains contained
Publicado em: 2000
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17. Block of current through T-type calcium channels by trivalent metal cations and nickel in neural rat and human cells.
1. The effects of the trivalent cations yttrium (Y3+), lanthanum (La3+), cerium (Ce3+), neodymium (Nd3+), gadolinium (Gd3+), holmium (Ho3+), erbium (Er3+), ytterbium (Yb3+) and the divalent cation nickel (Ni2+) on the T-type voltage gated calcium channel (VGCC) were characterized by the whole-cell patch clamp technique using rat and human thyroid C cell line