Stimulated Emission
Mostrando 1-12 de 92 artigos, teses e dissertações.
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1. Effects of the photobiomodulation using different energy densities on the periodontal tissues under orthodontic force in rats with type 2 diabetes mellitus
Abstract To evaluate the impact of the GaAlAs diode laser with energy densities of 160 J/cm2, 320 J/cm2, and 640 J/cm2 on the periodontal tissues under continuous orthodontic force application and on the rate of orthodontic tooth movement in rats with type-2 diabetes mellitus. The intensity of primary alveolar bone formation was also investigated through the
Braz. oral res.. Publicado em: 25/10/2018
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2. Attractants for automated emission measurement (Greenfeed®) in pasture-based systems
ABSTRACT This study aimed to evaluate the frequency and intensity of GreenFeed (GF) use by Nellore steers using different attractants in pastures of integrated systems. The attractant protein supplement and Tifton bermudagrass pelleted hay flavored with vanilla were evaluated over a period of 15 days. The pelleted hay stimulated the animals to stay longer in
R. Bras. Zootec.. Publicado em: 30/07/2018
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3. Recovery of α-Al2O3 from Ionizing Radiation Dosimetric Sensors
Corundum, sapphire or α-Al2O3 is an important technological material in many optical and electronic applications such as solid-state lasers, optical windows and, more recently, as a radiation detector. Landauer (Glenwood, IL, USA) accumulated large number of archived and stored Luxel™ dosemeters composed of Al2O3:C, which were subjected to a recovery proc
Mat. Res.. Publicado em: 2015-02
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4. CARACTERIZAÇÃO DE DETECTORES DE RADIAÇÃO DE ESPODUMÊNIO. / CHARACTERIZATION OF RADIATION DETECTORS SPODUMENE.
Dosímetros são muito empregados na monitoração de doses de radiação ionizante, sobretudo na dosimetria clínica e ambiental, fazendo-se o uso de técnicas como termoluminescência (TL), emissão exoleletrônica termicamente estimulada (TSEE) e luminescência opticamente estimulada (LOE). Diversas pesquisas têm sido feitas buscando desenvolver materiai
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/10/2012
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5. Espectroscopia ultrarrápida do polímero semicondutor luminescente MEH-PPV com excitação no ultravioleta / Ultrafast spectroscopy of the luminescent semiconducting polymer MEH-PPV with ultraviolet excitation
The optoelectronics industry is currently undergoing a transition period in which inorganic materials are being replaced by organic materials, oligomers and polymers, in the fabrication of some types of devices. However, factors such as low efficiency and low lifetime prevent polymer based devices on entering the market definitely. The solution of these issu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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6. Medição do desgaste de brocas helicoidais de aço rápido por meio do uso de um dispositivo a laser. / Measurement of the consuming of helical fast steel drills by means of the use of a device the laser.
Este trabalho demonstra como o desgaste das brocas helicoidais de aço rápido, pode ser medido por meio da utilização de um dispositivo LASER (Light Amplification by Stimulated Emission of Radiation). Foram realizados ensaios de furação em corpos de prova fabricados com aço 4340, utilizando brocas com diâmetro de 10 mm. A máquina utilizada nos ensaio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/06/2012
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7. Soybean extracts enriched with free isoflavones promote nitric oxide synthesis and affect the proliferation of breast adenocarcinoma cells
Although soybean isoflavones naturally accumulate in their conjugated forms, the beneficial effects on human health of soybean-containing foods have been credited to their aglycone forms. In the present study we analyzed the effects of a chemical agent, sodium nitroprusside (SNP), in eliciting the exudation of non-conjugated isoflavones from intact soybean s
Rev. bras. farmacogn.. Publicado em: 06/09/2012
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8. O laser em nossa vida: uma proposta de inserção da física moderna em sala de aula
O objetivo geral desta dissertação foi desenvolver uma proposta de ensino investigativa, envolvendo a Física Moderna no Ensino Médio. As atividades foram realizadas com um grupo de 27 alunos matriculados no terceiro ano do ensino médio do Colégio Estadual Mário Quintana, localizado em Barão de Cotegipe/RS. O tema escolhido foi ¿O Laser em nossas vid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/07/2011
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9. Propriedades Ãpticas dos vidros Er3+:PbPO4 / Optical Properties of the Er3+:PbPO4 Glasses
In this work we employ several techniques to investigate the optical properties of moderately high Er3+-doped lead phosphate (EDLP) glasses. The third-order optical susceptibility, χ3, and dispersion of the linear refractive index, n0(λ), of Er3+:PbPO4 were measured in the wavelength range between 400 and 1940 nm by using the spectrally resolved fe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2010
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10. Estudo de parâmetros espectroscópicos de íons de Nd3+ no sistema vítreo SNAB (SiO2 Na2CO3 Al2O3 B2O3) nanoestruturado com nanocristais de CdS
In this work, experimental evidences have been observed for energy transfer from CdS nanocrystals, synthesized by the fusion method, to Nd3+ ions embedded in vitreous substrates (SNAB: SiO2 Na2O Al2O3 B2O3). These dot samples doped with neodymium have been investigated by combined optical absorption (OA), photoluminescence (PL), and time-resolved photolumine
Publicado em: 2010
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11. CARBON AND NITROGEN MINERALIZATION IN THE SOIL WITH USE OF SEWAGE SLUDGE AND OAT STRAW / MINERALIZAÇÃO DO CARBONO E DO NITROGÊNIO NO SOLO COM O USO DE LODO DE ESGOTO E PALHA DE AVEIA
The use of sewage sludge in the agricultural is an organic recycle alternative material in the soil. The CONAMA resolution 375/2006 indicates that in certain relief condition the sewage sludge could be applied without soil incorporation, making it possible to use in areas with no-till. The present study was carried out with the aim to evaluate nitrogen and c
Publicado em: 2009
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12. AmplificaÃÃo Raman de pulsos curtos em fibras Ãpticas com ganho periÃdico / Raman amplification of short pulses in optical fibers with periodic gain
Optical Amplifiers amplify incident light through stimulated emission, the same mechanism which is used by lasers. Indeed, an optical amplifier, it is not but a laser without feedback. Its main ingredient is optical gain which is realized when the amplifier is under pumping process (optically or electrically) in order to cause population inversion at electro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/04/2008