Cathodoluminescence
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Microfacies and diagenetic evolution of the limestones of the upper part of the Crato Formation, Araripe Basin, northeastern Brazil
Abstract This paper presents the results of a petrographic and diagenetic study of the laminated limestones of the upper part of the Aptian to Albian Crato Formation, northeast of Brazil. The applied techniques were optical microscopy, cathodoluminescence and scanning electron microscopy (SEM) coupled to a wavelength-dispersive spectrometer (WDS). Petrograph
Braz. J. Geol.. Publicado em: 08/04/2019
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2. Color electron microprobe cathodoluminescence of Bishunpur meteorite compared with the traditional optical microscopy method
Abstract Cathodoluminescence (CL) imaging is an outstanding method for sub classification of Unequilibrated Ordinary Chondrites (UOC) - petrological type 3. CL can be obtained by several electron beam apparatuses. The traditional method uses an electron gun coupled to an optical microscope (OM). Although many scanning electron microscopes (SEM) and electron
REM, Int. Eng. J.. Publicado em: 2018-04
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3. A cathodoluminescence-assisted LA-ICP-MS study of topaz from different geological settings
ABSTRACT: In this study, the crystallization dynamics and the fingerprints of two topaz crystals from the Ouro Preto region (Brazil), two from the Eastern Brazilian Pegmatite Province (EBPP), one from the Western part of the United States (US) and one from Pakistan were characterized. The combination of scanning electron microscope-cathodoluminescence (SEM-C
Braz. J. Geol.. Publicado em: 2018-01
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4. ZnO nanoparticle fabrication starting from ultra-high (1:2) PVOH/ZnAc proportion electrospun nanowire mats
Abstract: The high versatility of nanostructured ZnO has drawn considerable attention from the scientific community since the second half of the two thousand decade. Within this timeframe, electrospinning became one of the simplest ways to produce nanostructured ZnO. In this work, we present the production and characterization of ZnO nanoparticles obtained f
Braz. J. Chem. Eng.. Publicado em: 2018-01
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5. Effectiveness of different final irrigation techniques and placement of endodontic sealer into dentinal tubules
Abstract: The aim of this study was to compare two irrigation techniques and four devices for endodontic sealer placement into the dentinal tubules. Ninety-nine single-rooted human teeth were instrumented and allocated to either the control (CO) (n=11) or experimental groups according to the irrigation method: syringe and NaveTip needle (NT) (n=44), and Endo
Braz. oral res.. Publicado em: 18/12/2017
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6. The Buritizal meteorite: classification of a new Brazilian chondrite
Abstract On August 14, 1967, the reporter Saulo Gomes, working at TV Tupi, went to a small city in the State of São Paulo called Buritizal to investigate reports of a meteorite fall and write a newspaper report. He actually recovered three fragments of the meteorite at a small farm. In 2014, he donated one of the fragments to the Museu Nacional of the Unive
REM, Int. Eng. J.. Publicado em: 2017-06
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7. Cimentação carbonática em reservatórios siliciclásticos : o papel da dolomita
Carbonates are important diagenetic cements in siliciclastic rocks thus important to determine these rocks as hydrocarbon reservoirs. The cement is the material had chemically precipitated partial or totally pore filling, affecting rock values of porosity and permeability. The acknowledgment of diagenetic patterns those are associated to the carbonatic cemen
Publicado em: 2010
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8. O deposito de oxido de ferro-cobre-ouro bacaba, provincia mineral de Carajas, PA : geocronologia U-Pb das rochas hospedeiras / Iron oxide-Cu-Au bacaba deposit, Carajas mineral province (PA), Brazil : U-Pb geocronology of the host rocks
The Bacaba iron oxidecoppergold deposit, situated in the Itacaiúnas Shear Belt, Carajás Mineral Province (Brazil), represents a satellite prospect of the world-class Sossego deposit, and might also represent a distal and deeper portion of the same or related hydrothermal system. The Bacaba deposit is located along a WNWESE-striking shear zone that de
Publicado em: 2010
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9. Contribuição da catodoluminescência para o entendimento da diagênese da formação Jandaíra: áreas do campo de petróleo da fazenda Belém e Lajedo do Rosário
O objetivo geral deste trabalho foi contribuir para a compreensão da evolução química dos fluidos percolantes através das rochas carbonáticas da Formação Jandaíra. As condições oxidantes e redutoras nas quais grãos, matriz e cimento foram formadas foi investigada usando a técnica da catodoluminescência (CL). A área de estudo localiza-se a oest
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2009
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10. NANOESTRUTURAS DE ZNO ALTAMENTE LUMINESCENTE: SYNTESIS Y CARACTERIZACIÓN / NANOESTRUTURAS DE ZNO ALTAMENTE LUMINESCENTE: SÍNTESE E CARACTERIZAÇÃO / HIGHLY LUMINESCENT ZNO NANOESTRUCTURES: SYNTHESIS AND CHARACTERIZATION
Zinc Oxide hás been synthesized by evaporation, condensation, and oxidation of methallic zinc under atmospheric pressure. Two methods of synthesis, denominated stationary and dynamic, were developed in this study. In the stationary system has the local control of temperature and a alumina tube-furnace reactor has been used. Zn was evaporated at 900-1000 C i
Publicado em: 2007
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11. Scanning Electron Microscope Observations of Herbicide Dispersal Using Cathodoluminescence as the Detection Mode 1