Data Refinement
Mostrando 1-12 de 208 artigos, teses e dissertações.
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1. Analysis and evaluation of structural properties of Co3O4 microparticles obtained at low temperature
Abstract In the present research, the synthesis of cobalt oxide Co3O4 was carried out using the sol-gel technique with subsequent heat treatment at 225 and 235 °C. The final product obtained was characterized by X-ray diffraction (XRD), showing a pure crystalline phase of Co3O4, cell parameters a=b=c=8.071 Å, and a volume of 525.7 Å3. The particle size wa
Cerâmica. Publicado em: 2022
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2. QUANTIFICAÇÃO DE MULLITA PROVENIENTE DE RESÍDUOS DE CAULIM DA REGIÃO AMAZÔNICA: USO DO MÉTODO DE RIETVELD
Mullite is used to obtain a refractory material, there are several factors that influence the synthesis process of mullite: the preparation of the mixture, the precipitation and the reaction of SiO2 and Al2O3. For the synthesis of mullite, samples of kaolin processing residues were used as precursor material, because it presents SiO2 and Al2O3 in its composi
Quím. Nova. Publicado em: 2021-04
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3. Crystallographic Changes Accompanying the Verwey Transition in a Magnetite from Steatite
The crystallographic structural analysis of the magnetite of a steatite rock at 298 K, (saturation magnetization, σ = 95.0 J T-1 kg-1) showed two cubic networks and, below Verwey temperature (TV ca.120 K) a monoclinic structure, basing on their cell dimensions and different transitional behaviors when reducing the temperature. A monoclinic structure was ide
J. Braz. Chem. Soc.. Publicado em: 2020-09
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4. GPU Finite Element Method Computation Strategy Without Mesh Coloring
Abstract A GPU-adapted Finite Element Method (A-FEM) implementation without using a mesh coloring strategy to avoid race conditions is presented. All the elements are simultaneously processed, and the local data is computed and consolidated into the device memory in a new adapted Coordinate Format data structure (a-COO). The comparison between the proposed s
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-06
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5. Validation of an algorithm based on clinical, histopathological and immunohistochemical data for the diagnosis of early-stage mycosis fungoides,
Abstract Background: Diagnosis of mycosis fungoides is challenging due to the non-specificity of clinical and histopathological findings. The literature indicates an average delay of 4-6 years for a conclusive diagnosis. Refinement of the histopathological criteria for the diagnosis of patients in early stages of the disease is considered of interest. Obje
An. Bras. Dermatol.. Publicado em: 2020-06
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6. Screening of the Au:Pt Atomic Ratio Supported in SrCO3: Effects on the Performance of the Solvent-Free Oxidation of Benzyl Alcohol
We have prepared, by a sol-immobilization method, bimetallic catalysts with different Au:Pt atomic ratios supported on commercial SrCO3. The catalytic performance for the oxidation reaction of benzyl alcohol of such materials was compared to the monometallic counterparts, aiming at the obtaining of the best composition of the material. It was found that the
J. Braz. Chem. Soc.. Publicado em: 2020-03
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7. Evaluation of the Influence of the Substituting Cation on the Structural and Morphological Properties of the New Garnet Sm3−xREExFe5O12 (REE = Dy, Gd and Lu)
Rare earth garnets (REE3Fe5O12) have magnetic-electric and optical properties that can be used in transmitters, microwave and data storage devices. These properties depend mainly on partial or total substitution of the cationic sites, as well as by the synthesis method used. Therefore, in this work was studied the influence of the substituting cation on the
Mat. Res.. Publicado em: 20/01/2020
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8. CADERNOS DE PSICOLOGIA SOCIAL DO TRABALHO: METASSÍNTESE DA PRODUÇÃO PUBLICADA EM DUAS DÉCADAS
Resumo O objetivo deste artigo é a apresentação da metassíntese elaborada a partir da revista Cadernos de Psicologia Social do Trabalho (CPST). A metassíntese compreende um método de revisão, que visa a sistematizar, descrever e conduzir o material em estudo a uma análise interpretativa dos resultados. É um modo de apresentar a história da revista
Psicol. Soc.. Publicado em: 05/12/2019
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9. Knowledge of the care of wounded patients: evidence of validity of an instrument
RESUMO Objetivo: Identificar as evidências de validade, segundo os índices de dificuldade e discriminação dos itens, de um instrumento para avaliação do conhecimento de acadêmicos de enfermagem no cuidado à pessoa com lesão. Método: Estudo metodológico desenvolvido em instituição de ensino superior de enfermagem com 117 estudantes de graduaç�
Rev. Bras. Enferm.. Publicado em: 21/10/2019
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10. Evidence of a new ordered vacancy crystal structure in the compound Cu3In7Te12
ABSTRACT The crystal structure of the ordered vacancy compound (OVC) Cu3In7Te12 is analyzed using powder X-ray diffraction data. It is found that this OVC crystallizes with a chalcopyrite-related structure, in the tetragonal space group P4 2c (Nº 112), with unit cell parameters and volume a = 6.1720(2) Å, c = 12.3597(8) Å, and V = 470.83(4) Å3. The Rietv
Matéria (Rio J.). Publicado em: 20/05/2019
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11. Compositional Similarity of Urban Green Areas in Southeastern Brazil
ABSTRACT Urban afforestation greatly contributes to the ex situ conservation of native species in urban centers of Brazil. In this way, the aim of the present work was to analyze the similarity of the arboreal-shrub flora among urban afforestation in southeastern Brazil. For this analysis, a binary matrix with data of 283 species present in 20 municipalities
Floresta Ambient.. Publicado em: 02/05/2019
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12. PROTOCOL OF NURSING CARE ON ZERO DAY OF THE TRANSPLANTATION OF HEMATOPOETIC STEM CELLS: COLLECTIVE CONSTRUCTION
RESUMO Objetivo: construir um protocolo de cuidados de enfermagem ao paciente no dia zero do transplante de células-tronco hematopoéticas. Método: trata-se de pesquisa convergente assistencial, desenvolvida de agosto a dezembro de 2016 em um Serviço de Transplante de Medula Óssea. Os participantes foram vinte e dois enfermeiros deste serviço. A técn
Texto contexto - enferm.. Publicado em: 18/04/2019