Field Emission
Mostrando 13-24 de 287 artigos, teses e dissertações.
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13. INNOVATION SYSTEM IN AIR TRANSPORT MANAGEMENT
Abstract Identifying previous research subjects on innovation management in air transport provides not only updated references on new technologies in this industry, but also indicates which areas need to be prioritized in future research. A systematic literature review of publications in this field over the past decade, from 2005 to 2015, including 2016 publ
JISTEM J.Inf.Syst. Technol. Manag.. Publicado em: 02/12/2019
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14. Qualidade dos dados de causas de morte no Sul do Brasil: a importância das causas garbage
Resumo Introdução: O objetivo do estudo foi analisar a qualidade dos dados sobre causas de morte na região Sul do Brasil. Métodos: Foi utilizado o Sistema de Informação sobre Mortalidade para avaliar a ocorrência de causas garbage (CG) nas declarações de óbito (DO) de residentes nos estados e capitais da região Sul entre 2015 e 2016. As CG foram
Rev. bras. epidemiol.. Publicado em: 28/11/2019
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15. Biologically Synthesized Silver Nanoparticles for Enhancing Tetracycline Activity Against Staphylococcus aureus and Klebsiella pneumoniae
Abstract Phytochemical content of plant extracts can be used effectively to reduce the metal ions to nanoparticles in one-step green synthesis process. In this study, six plant extracts were used for the synthesis of silver nanoparticles (AgNPs). Biologically synthesized AgNPs was characterized using UV-Vis Spectrophotometer, Field Emission Scanning Electro
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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16. 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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17. Methane emission from a flooded rice field under pre-germinated system
RESUMO: Estudos locais de mensuração de fluxos de gases de efeito estufa em sistemas agrícolas têm sido incentivados a nível global como base para subsidiar estimativas nacionais e estaduais de emissão. Este estudo objetivou quantificar a emissão sazonal de metano (CH4) em cultivo de arroz irrigado, sob sistema pré-germinado, no município de Tremem
Cienc. Rural. Publicado em: 17/10/2019
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18. Obtaining Composites Powders of Al2 O3 / Ni and Al2 O3 / Nb by Mechanical Alloying
Mechanical alloying (MA) can be highlighted among the various methods and powder processing forms, which consists of producing homogeneous materials from elementary powders. This process is of paramount importance as it has the ability to reduce the particle size of the powders and can often promote bonding between elements which have low interaction and wet
Mat. Res.. Publicado em: 14/10/2019
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19. Silver nanoparticles incorporated PVC films: evaluation of structural, thermal, dielectric and catalytic properties
Abstract In this work, silver nanoparticle – polyvinylchloride (SNC-PVC) composites were synthesized by loading 2.5% to 10.0% silver ions to PVC using simple solution casting technique. Material properties including dielectric, thermal stability were discussed in some detail. Incorporation of silver nanoparticles (SNPs) in the PVC matrix was confirmed by U
Polímeros. Publicado em: 03/10/2019
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20. Catalytic Removal of Toluene from Air Streams by Cobalt Oxide Supported on Sepiolite
Removal of toluene using cobalt oxide supported on sepiolite catalysts was investigated. Deposition precipitation method was used to prepare the catalysts. The catalysts were characterized using X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric analysis (TGA) and Brunauer-Emmet-Teller meth
J. Braz. Chem. Soc.. Publicado em: 16/09/2019
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21. Caracterização do composto de CuCr2O4 obtido pelo método da reação de combustão em solução
RESUMO O material CuCr2O4 foi sintetizado pela reação de combustão em solução e tratado termicamente na faixa de 600 à 1100oC, afim de verificar a evolução das fases. O composto foi carcterizado estrutural e morfologicamente por meio das técnicas de Difração de Raios X (DRX), refinamentos pelo método de Rietveld, Microscopia Eletrônica de Varred
Matéria (Rio J.). Publicado em: 16/09/2019
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22. The effect of very low dose pulsed magnetic waves on cochlea
Resumo Introdução: Os sistemas biológicos são geralmente expostos a forças de campo magnético em diferentes intensidades e frequências, direta ou indiretamente, na vida diária. Apesar dos resultados negativos, o uso terapêutico do campo magnético de baixa dose tem sido encontrado em estudos recentes. O efeito das forças do campo magnético sobre
Braz. j. otorhinolaryngol.. Publicado em: 10/07/2019
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23. Thermal, dielectric and catalytic behavior of palladium doped PVC films
Abstract The present paper discusses the aspects of synthesizing palladium (Pd) doped (Pd+2 and Pd0) poly(vinyl chloride) (PVC) using simple solution cast technique. The Pd loading to PVC was altered from 2.5% to 10.0% and the material properties were studied using UV-Visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscop
Polímeros. Publicado em: 04/07/2019
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24. Epidermal morphology of the cordaitalean leaf Noeggerathiopsis brasiliensis nom. nov. from the southern Paraná Basin (Lower Permian, Rio Bonito Formation) and paleoenvironmental considerations
Abstract A Brazilian cordaitalean leaf is reassigned and redescribed based on cuticular analysis. The new name Noeggerathiopsis brasiliensis is erected as a replacement for Rufloria gondwanensis Guerra-Sommer. The leaf adpressions come from a tonstein layer within a Sakmarian coal seam of the Faxinal Coalfield, southern Paraná Basin, Brazil (U-Pb SHRIMP mea
Braz. J. Geol.. Publicado em: 01/07/2019