Gallium
Mostrando 1-12 de 125 artigos, teses e dissertações.
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1. Review of Power Device for Solar-Powered Aircraft Applications
ABSTRACT This paper reviews various power device components of solar-powered aircraft such as photovoltaic (PV) cells, maximum power point tracker (MPPT) and rechargeable batteries. The various power device components were highlighted, and the ones applicable to aircraft were analyzed, based on criteria as efficiency for photovoltaic cells; energy densities
J. Aerosp. Technol. Manag.. Publicado em: 10/10/2019
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2. Influence of photobiomodulation therapy on root development of rat molars with open apex and pulp necrosis
Abstract This study aimed to evaluate the role of photobiomodulation (PBM) in apexification and apexogenesis of necrotic rat molars with an open apex. Rat molars were exposed to the oral environment for 3 weeks. Canals were rinsed with 2.5% NaOCl and 17% EDTA, filled with antibiotic paste and sealed. After 7 days, canals were rinsed and divided into six grou
Braz. oral res.. Publicado em: 26/08/2019
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3. PANCREATIC NEUROENDOCRINE TUMORS: SURGICAL RESECTION
RESUMO Introdução: Os tumores neuroendócrinos pancreáticos (TNE-P) correspondem a cerca de 3% de todas as neoplasias no pâncreas e são de diagnóstico e manejo difíceis. Objetivo: Revisar o diagnóstico e tratamento desses tumores disponíveis na literatura científica atual. Método: Foi realizado levantamento bibliográfico por meio de pesquisa o
ABCD, arq. bras. cir. dig.. Publicado em: 07/02/2019
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4. Structural and Optical Properties of GaN Thin Films Grown on Si (111) by Pulsed Laser Deposition
In this work we present results and analysis concerning the processing and characterization of Gallium Nitride (GaN) thin films (TF) grown on Si (111) substrates by pulsed laser deposition technique (PLD), which were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and Raman spectroscopy (RS). The GaN films show
Mat. Res.. Publicado em: 14/01/2019
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5. Clinical perspectives of PSMA PET/MRI for prostate cancer
Prostate cancer imaging has become an important diagnostic modality for tumor evaluation. Prostate-specific membrane antigen (PSMA) positron emission tomography (PET) has been extensively studied, and the results are robust and promising. The advent of the PET/magnetic resonance imaging (MRI) has added morphofunctional information from the standard of refere
Clinics. Publicado em: 21/09/2018
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6. Synthesis of Gallium Nitride and Related Oxides Via Ammonobasic Reactive Sublimation (ARS)
Ammonobasic reactive sublimation (ARS) is proposed as a novel method to synthesize GaN and related oxides. Results indicate that GaN growth occurs by a nitriding process of Ga and related oxides, establishing a direct dependence on NH4OH amount added as a primary chemical reactive. The samples were grown on p-type Si (111) substrates inside a tube furnace, e
Mat. Res.. Publicado em: 28/09/2017
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7. Growth and Characterization of AlxGa1-xAs Obtained by Metallic-Arsenic-Based-MOCVD
In this work reports results related to growth and characterization of AlxGa1-xAs epilayers, which were grown in a metallic-arsenic-based-MOCVD system. The gallium and aluminium used precursors were trimethylgallium (TMGa) and trimethylaluminium (TMAl), respectively. By photoluminescence measurements observed, that only samples grown at temperatures above 80
Mat. Res.. Publicado em: 23/03/2017
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8. The efficacy of low-level 940 nm laser therapy with different energy intensities on bone healing
Abstract The aim of this study was to evaluate the efficacy of low-level 940 nm laser therapy with energy intensities of 5, 10 and 20 J/cm2 on bone healing in an animal model. A total of 48 female adult Wistar rats underwent surgery to create bone defects in the right tibias. Low-level laser therapy (LLLT) was applied immediately after surgery and on post-op
Braz. oral res.. Publicado em: 05/01/2017
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9. Gallium-Containing Mesoporous Silica: Supported Catalysts with High Catalytic Activity for Oxidation of Benzene, Toluene and o-Xylene
Benzene, toluene and xylene (BTX) are a particular class of volatile organic compounds, which are highly toxic pollutants. In this study, samples of gallium-containing mesoporous silica (MS-Ga7% and MS-Ga11%) were synthesized and their catalytic activity in the oxidation of BTX was investigated. The physicochemical characterization shows that the inclusion o
J. Braz. Chem. Soc.. Publicado em: 2017-01
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10. Comprehensive Study of Growth Mechanism and Properties of Low Zn Content Cd1-xZnxS Thin Films by Chemical Bath
Cd1-xZnxS thin films have been studied extensively as window layers for solar cell applications. However, a mismatch between the Cd1-xZnxS and copper-indium-gallium-selenide absorber layers increases with Zn film concentration, which reduces the device efficiency. In this work, Cd1-xZnxS thin films with low Zn concentrations were analyzed. The effect of the
Mat. Res.. Publicado em: 03/10/2016
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11. Potencial cicatrizante da pomada de Sebastiania hispida (Mart.) Pax (Euphorbiaceae) comparado ao laser de baixa potência
Resumo A cicatrização deficiente representa uma complicação grave em algumas patologias e o uso de extratos de plantas tem demonstrado melhora no processo de reparação tecidual. O objetivo deste estudo foi avaliar o potencial cicatrizante da pomada de Sebastiania hispida comparado ao Laser Indio Phosphide-Gallium-Aluminum (InGaAlP) em feridas cutâneas
Braz. J. Biol.. Publicado em: 03/10/2016
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12. Pechini Synthesis of Nanostructured Li1.05M0.02Mn1.98O4 (M = Al3+ or Ga3+)
Doped Li1.05M0.02Mn1.98O4 (M = Ga3+ or Al3+) were prepared by Pechini synthesis using lithium and manganese acetates, citric acid, ethylene glycol, and the respective oxide or acetate of the doping ions in molar ratios of 2.00 (Mn1.98 + M0.02) to 1.05 Li. The TGA/DTA of the precursor gels showed weight loss/energy relative to crystallization below 450 ºC. F
Mat. Res.. Publicado em: 17/11/2015