Zno
Mostrando 13-24 de 286 artigos, teses e dissertações.
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13. Começa a Temporada de Frio nos Trópicos. A Crioablação da Fibrilação Atrial no Brasil
Resumo Matriz semicondutora de ZnO, dopada com Eu nas concentrações de 0,05 e 0,10 mols, foi sintetizada por reação de combustão utilizando nitrato de zinco, nitrato de európio e ureia como combustível. No intuito de analisar o efeito da concentração de európio e da sinterização na estrutura, band gap, propriedades magnéticas e morfológicas do
Arq. Bras. Cardiol.. Publicado em: 2020-09
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14. Análise das propriedades estruturais, morfológicas e magnéticas do semicondutor magnético diluído ZnO:Eu obtido via reação de combustão
Resumo Matriz semicondutora de ZnO, dopada com Eu nas concentrações de 0,05 e 0,10 mols, foi sintetizada por reação de combustão utilizando nitrato de zinco, nitrato de európio e ureia como combustível. No intuito de analisar o efeito da concentração de európio e da sinterização na estrutura, band gap, propriedades magnéticas e morfológicas do
Cerâmica. Publicado em: 2020-09
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15. Propriedades estruturais, elétricas e óticas de filmes de óxido de zinco dopados com cobre depositados por spray-pirólise
Resumo O efeito da dopagem com cobre nas propriedades estruturais, elétricas e óticas de filmes de óxido de zinco foi avaliado. Filmes dopados com cobre (ZnO:Cu) foram depositados com sucesso em um substrato de vidro por spray-pirólise com concentração de dopante de 0, 2,5 e 7,5 %at (ZnO, ZC2.5, ZC7.5). Todos os filmes foram policristalinos, com fase w
Cerâmica. Publicado em: 2020-09
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16. Antimicrobial High-Density Polyethylene (HDPE)/ZnO Nanocomposites Obtained by in situ Polymerization
Nanostructured zinc oxide (ZnO) prepared by combustion in solution was used to obtain nanocomposites. The ZnO particles were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), and scanning electron microscopy (SEM), showing crystallite size of 32 nm and a superficial area of 32.6 m2 g-1. Nanocomposites with 1, 3, and 5 wt.% of ZnO in the
J. Braz. Chem. Soc.. Publicado em: 2020-08
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17. Evaluation of zinc-oxide nanocoating on the characteristics and antibacterial behavior of nickel-titanium alloy
RESUMO Objetivos: Avaliar o efeito do nanorrevestimento de óxido de zinco (ZnO) sobre as propriedades mecânicas e propriedades antibacterianas de fios ortodônticos de NiTi. Métodos: Fios 0,016” x 0,022” de NiTi foram revestidos com nanopartículas de ZnO por meio de um método de deposição eletroquímica com um sistema de três eletrodos a 0,1M
Dental Press J. Orthod.. Publicado em: 2020-08
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18. Synthesis of ZnO Nanoparticles by the Sol-Gel Protein Route: A Viable and Efficient Method for Photocatalytic Degradation of Methylene Blue and Ibuprofen
The photocatalytic degradation of methylene blue dye and ibuprofen drug was studied in the presence of zinc oxide, synthetized by the protein sol-gel route. The catalyst, calcined at 1000 ºC, presented a tendentious morphology to filaments characteristic of ZnO crystalline, characterized by X-ray diffraction (XRD) and confirmed by the presence of Zn energy
J. Braz. Chem. Soc.. Publicado em: 2020-08
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19. Effects of addition of engineered ZnO nanoparticles on the stability of colloidal suspensions containing TiO2 interacting with sandy soil
Abstract The stability of colloidal suspensions of engineered nanoparticles in the environment is of great interest for the risk assessment and treatment of hazardous materials. The relevance of this study is due to the evidence that engineered nanoparticles have been produced and used in commercial products in large scale, especially ZnO and TiO2, which are
REM, Int. Eng. J.. Publicado em: 2020-06
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20. GRAPHENE OXIDE AND A GO/ZnO NANOCOMPOSITE AS CATALYSTS FOR EPOXY RING-OPENING OF EPOXIDIZED SOYBEAN FATTY ACIDS METHYL ESTERS
Abstract In this work, the grapheme oxide (GO) and GO/ZnO nanocomposite were successfully obtained from the oxidation of graphite and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). In the GO/ZnO nanocomposite, the GO sheets were coated with aggregated
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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21. Impact of calcium aluminate cement with additives on dental pulp-derived cells
Abstract Calcium aluminate cement (CAC) has been highlighted as a promising alternative for endodontic use aiming at periapical tissue repair. However, its effects on dental pulp cells have been poorly explored. Objective: This study assessed the impact of calcium chloride (CaCl2) and bismuth oxide (Bi2O3) or zinc oxide (ZnO) additives on odontoblast cell re
J. Appl. Oral Sci.. Publicado em: 28/11/2019
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22. Influence of doping with Sm3+ on photocatalytic reuse of ZnO thin films obtained by spin coating
ABSTRACT The difficulty in the powder reuse favors the study of materials in the form of thin films. ZnO based films have high photocatalytic potential. In this work, ZnO:xSm3+ (x = 0, 1, 2 and 4 %mol) thin films were prepared by spin coating method. The resins obtained to manufacture the thin films were prepared by complex polymerization method. The samples
Matéria (Rio J.). Publicado em: 25/11/2019
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23. Photodegradation study of TiO2 and ZnO in suspension using miniaturized tests
ABSTRACT Miniaturization has been a trend in the instrumentation of chemical analyzes. The interest in miniaturization stems from the perceived benefits of faster, easier, less expensive and less wasteful analyzes than the tradition analyses. Thus, this work proposes a miniaturization of photocatalytic tests using a microplate reader for the analysis of seve
Matéria (Rio J.). Publicado em: 25/11/2019
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24. Influence of ZnO on the properties of elastomeric compositions and their leached extract
Abstract The reductionin zinc oxide (ZnO) content in elastomeric compositions has become a subject due to the deleterious effect of zinc ions on aquatic organisms. The purpose of this study was to develop elastomeric compositions containing 0, 1, 3 and 5 phr of ZnO aiming at assessing the influence of the different contents on the rheometric, mechanical and
Polímeros. Publicado em: 04/11/2019