Porous Distribution
Mostrando 1-12 de 72 artigos, teses e dissertações.
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1. Silicon carbide hollow fiber membranes developed for the textile industry wastewater treatment
Abstract In order to reduce the impacts of the industrial effluent on the environment, silicon carbide hollow fiber membranes were prepared by the precipitation-immersion technique and sintered at 1450 and 1500 °C. The membranes were characterized by X-ray diffraction, their surface structure was characterized by scanning electron microscopy and atomic forc
Cerâmica. Publicado em: 2021-06
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2. Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds
The adsorption capacities of two synthesized zeolites (crystalline ZSM-5 and semi-crystalline faujasite Y) for a mixture of indole, quinoline and carbazole were studied. The different samples obtained show different crystalline degree, mesoporosity and Si/Al ratios. The synthesis procedure is based on the simultaneous depolymerization of a mixture of high su
J. Braz. Chem. Soc.. Publicado em: 2021-01
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3. Avaliação das propriedades físicas, químicas e mineralógicas da fração fina (<150 µm) do agregado reciclado de RCD
Resumo Fatores como o alto consumo de recursos naturais e os elevados volumes de resíduos produzidos pela indústria da construção civil alertam sobre a importância de reutilizar e reciclar os materiais. Assim, este trabalho objetivou determinar e avaliar as características físicas, químicas e mineralógicas dos finos do agregado reciclado (FAR), comp
Cerâmica. Publicado em: 2019-01
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4. Estructuras de titanio con gradiente de porosidad – fabricación por el método de partículas espaciadoras y caracterización
ABSTRACT It has proposed the use of porous titanium to reduce the problem of mechanical incompatibility, which occurs between such material used in implants and bone. The pores introduction in titanium decreases its elastic modulus by bringing it closer to that of both cortical and trabecular bones. This paper describes titanium fabrication by powder metallu
Matéria (Rio J.). Publicado em: 19/07/2018
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5. Analyzing the compressive behavior of porous Ti6Al4V by X-ray microtomography
Samples with 40% vol. of pores and a pore size distribution between 100 and 500 µm were produced by powder metallurgy from Ti6Al4V alloy powders. Sintering was performed at 1300 °C during one hour in an inert Argon atmosphere in a vertical dilatometer. The compressive strength and the porosity of these samples was investigated before and after compression
Mat. Res.. Publicado em: 21/08/2017
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6. Fabrication of Multiple Layered Scaffolds with Controlled Porous Micro-Architecture
A multi-layer scaffold that incorporates bioglass, phosphatidylserine and steroidal saponins loaded collagen microparticles was prepared in this study. Combinatorial processing techniques involving porogen leaching protocol and freeze-drying were used. Drug distribution and microstructure could be controlled mainly by the concentrations of drug-loaded collag
Mat. Res.. Publicado em: 16/01/2017
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7. Fabricación de alúmina anódica porosa de bajo costo: Un estudio comparativo de la morfología producida por uno y dos pasos de anodizado
ABSTRACT A simple and low cost method for the fabrication of Nanoporous alumina templates with potential applications for nanowires fabrication is described. As raw material, commercial aluminum has been used. The nanoporous templates obtained have a mean pore diameter of (20 ± 4) nm. The fabrication process consists mainly of two-step anodization. Both ste
Matéria (Rio J.). Publicado em: 2016-09
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8. Liquid Bovine Biofertilizer and Cultivation Effects on the Porosity of a Typic Haplocambids as a Function of Cultivation and Dose
ABSTRACT The soil porous space is where processes related to gases and soil solution occur, and provides an adequate guide for agricultural practices. This study aimed to evaluate the integrated effects of cultivation and the application of liquid bovine biofertilizer on the porous network of a Typic Haplocambids (Cambissolo Háplico Ta Eutrófico) cultivate
Rev. Bras. Ciênc. Solo. Publicado em: 28/07/2016
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9. Influencia de la porosidad en las propiedades magnéticas de arreglos de nanohilos de Ni
ABSTRACTThe hysteresis properties of ordered arrays of Ni nanowires, electrodeposited into cylindrical nanoporous alumina membranes were investigated. The effect of the nanowire geometry (diameter and length), the array order and the nanowires' volume fraction on the array coercivity and remanence were analyzed. Porous alumina membranes were produced by a tw
Matéria (Rio J.). Publicado em: 2015-09
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10. Physical and mechanical characterization of a porous cement for metaphyseal bone repair
OBJECTIVE: Macroporous cement with mechanical properties similar to cancellous bone may improve the treatment of large bone defects in relation to solid acrylic cement. The aim of this study was to compare physical and mechanical characteristics of a polymethyl methacrylate (PMMA) based porous cement with cancellous bone. METHODS: Compressive strength and p
Acta ortop. bras.. Publicado em: 2015-08
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11. Two-Dimensional Fractional Order Generalized Thermoelastic Porous Material
AbstractIn the work, a two-dimensional problem of a porous material is considered within the context of the fractional order generalized thermoelasticity theory with one relaxation time. The medium is assumed initially quiescent for a thermoelastic half space whose surface is traction free and has a constant heat flux. The normal mode analysis and eigenvalue
Lat. Am. j. solids struct.. Publicado em: 2015-07
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12. Soil physical quality of Mollisols quantified by a global index
Indicators synthesizing the state of the structural quality and the function of the porous system are useful for assessing soil production capacity as well as the way it may serve natural ecosystems. This research aimed (i) to determine indicators of the state and function of the porous system, (ii) to use them to derive a global index to characterize the so
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-02