Micro Porous Structure
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. 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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2. Two and three-dimensional morphometric analysis of trabecular bone using X-ray microtomography (µCT)
INTRODUCTION: Trabecular bones have a porous microstructure and can be modeled as linear elastic solids, heterogeneous and anisotropic. In the literature, few investigations have compared the two- dimensional (2D) and three-dimensional (3D) morphometric analyses of cancellous bone. METHODS: In this investigation eighteen cylindrical samples of cancellous bon
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-06
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3. Scaffolds baseados em nanopartículas de fosfatos de cálcio para engenharia tecidual óssea / Scaffolds based on calcium phosphate nanoparticles for bone tissue engineering
Tissue engineering associated with nanotechnology stood out because of its multidisciplinarity and results, in addition to targeting many areas of study in the field of regenerative medicine. For the process of bone regeneration to occur in appropriate form, the injured area must be organized. The reorganization of the 3D structure in the affected area shoul
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/07/2012
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4. Análise de curvas de retenção e distribuição de poros de um latossolo vermelho distrofico submetido aos sistemas de plantio convencional e direto
Para avaliar os impactos ambientais gerados pelos sistemas de plantio, é necessário avaliar as variações provocadas por eles na estrutura do solo. O espaço poroso é o melhor indicador da qualidade estrutural do solo, pois é responsável, dentre muitos fatores, por fenômenos de transporte de água e solutos em seu interior e retenção de água por el
Publicado em: 2009
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5. Membranas de quitosana micro e macroporosas : preparo, caracterização e estudos de permeabilidade
Two methodologies were proposed to obtain micro and macroporous chitosan membranes, using two different porogenic agents. The methodologies proved to be effective in control the porosity as well as the pore size. Thus, microporous membranes were obtained through the physical blend of chitosan and polyethylene oxide (PEO) on an 80:20 (m/m) ratio, respectively
Publicado em: 2008
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6. Compósitos cerâmicos porosos de alumina - zircônia para aplicação em sistemas de controle térmico para satélites: obtenção e caracterização / Alumina-zirconia porous ceramic composites for application in satellite thermal control systems: obtaining and characterization
To control the temperature of satellites are used various thermal control heat systems. The Loop Heat pipe (LHP) are being developed at the DEM (Space Mechanic and Control Division) of the INPE (National Institute for Space Research) an apparatus for passive heat control of the satellites components. The main components of the LHP system are: capillary evapo
Publicado em: 2008
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7. Nanocomposites and nanostructures of II-VI and IV-VI semiconductors / Nanocompositos e nanoestruturas de semicondutores das familias II-VI e IV-VI
The development of nanostructures and their applications constitute one of the most exciting scientific areas. A great number of studies in this area concern the preparation methods. Generally, they are classified in physical and chemical methods. The former class is based on molecular beam and lithography techniques, while the latter involves chemical react
Publicado em: 2007
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8. Estudo do comportamento ao desgaste e corrosÃo dos aÃos inoxidÃveis AISI 316L e AISI 420 depositados pelo processo de aspersÃo tÃrmica a arco elÃtrico
Mechanical components behavior in service, are extremely dependent on the surface quality, the contact between areas and the environment where they are applied. Particularly, corrosion and ware damage, directly and indirectly, mechanical components surface that result in rise production and maintenance cost due to no programmed equipments stops to repair or
Publicado em: 2007
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9. Produção e modificação de carvões ativados para aplicações ambientais
In this work it was investigated the production and characterization of activated carbons from lignocelulosic and synthetic polymeric precursors. From the modification of surface and structural properties it was investigated different applications of these activated carbon as adsorbents. In the first part, activated carbons with molecular sieve properties we
Publicado em: 2007
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10. Investigation of the performance of diferent micro-porous tubular structures in the retention of bacteria emulsion by crossflow microfiltration / Investigação do desempenho de diferentes estruturas microporosas tubulares na retenção de bactérias em suspensão por microfiltração tangencial
Neste trabalho são apresentados resultados experimentais do processo de filtração tangencial de uma suspensão in natura (soro de leite) aplicada na retenção de bactérias do grupo coliforme. No estudo do processo de separação utilizaram-se tubos microporosos de -alumina (Al2O3) e membranas comerciais de tamanho médio de poros no valor de 0,8 e 1,2m.
Publicado em: 2006
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11. Evolução das estruturas turbostratica e porosa de materiais carbonosos obtidos por tratamento termico do Pinus elliottii entre 600C e 2600C
Pine wood samples of Pinus elliottii were heal treated in a range of temperatures from 600 ºC to 2600 ºC. In inert atmosphere. The charcoals, the subject of this research work, were then obtained. It was assumed that this material behaves according to the granular structure model proposed by Emmerich and that it exhibits a porous structure made up of micro
Publicado em: 1991