Microporous
Mostrando 13-24 de 116 artigos, teses e dissertações.
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13. The effects of ankaferd blood stopper and microporous polysaccharide hemospheres on epidural fibrosis in rat laminectomy model
ABSTRACT PURPOSE: To investigate whether topically administered hemostatic agents ankaferd blood stopper and microporous polysaccharide hemospheres can decrease epidural fibrosis after laminectomy in rats. METHODS: Eighteen adult male Sprague-Dawley rats were equally and randomly divided into three groups. In the treatment groups, ankaferd blood stopper an
Acta Cir. Bras.. Publicado em: 2015-12
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14. Microporous Nano-hydroxyapatite/collagen/phosphatidylserine Scaffolds Embedding Collagen Microparticles for Controlled Drug Delivery in Bone Tissue Engineering
AbstractScaffolds featuring spatiotemporal control of drug release is highly desirable for bone tissue regeneration. The objective of this study was to construct a scaffold with gradient porosity and drug distribution and evaluate the effect of scaffold structure on drug release kinetics and cell bioactivity. Nano-hydroxyapatite/collagen/phosphatidylserine s
Mat. Res.. Publicado em: 2015-10
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15. Production of porous ceramic materialusing different sources of alumina and calcia
ABSTRACTNumerous papers and publications report the use of microporous calcium hexaluminate (CaO.6Al2O3; CA6) as a key raw material for high temperature insulating materials. This material has unique properties with respect to chemical purity and mineral composition. Another important property of CA6 is its structure, which consists of platelet-shaped crysta
Matéria (Rio J.). Publicado em: 2015-09
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16. Preparation and Characterization of PA66/Alumina Composite Membrane
In this study, polymer/ceramic composite membranes were prepared and characterized. The polymer used was polyamide 66 (PA66) deposited by dip coating on the inner surface of α-alumina-based (Al2O3) microporous tube. A coating on the ceramic support surface and the formation of the selective layer was analyzed by scanning electron microscopy (SEM) in membran
Mat. Res.. Publicado em: 2015-08
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17. Structural study and fluorescent property of a novel organic microporous crystalline material
Um novo material orgânico microporoso [(2-{2-[2-(bis-metoxicarbonilmetilamino)fenoxi]etoxi}-4-benzimidazol-fenil)metoxicarbonilmetilamino] éster metílico do ácido acético 6 foi sintetizado e caracterizado por difração de raio X de cristal único, espectroscopia no infravermelho por transformada de Fourier (FT-IR), espectrometria de massas de alta reso
J. Braz. Chem. Soc.. Publicado em: 2014-01
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18. Nanoporous materials: pillared clays and regular silicas as an example of synthesis and their porosity characterization by X-ray diffraction
Because of their practical applications, porous materials attract the attention of undergraduate students in a way that can be used to teach techniques and concepts in various chemistry disciplines. Porous materials are studied in various chemistry disciplines, including inorganic, organic, and physical chemistry. In this work, the syntheses of a microporous
Quím. Nova. Publicado em: 2014
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19. Adsorção de CO2 em peneiras moleculares micro e mesoporosas
Microporous molecular sieves of type Y, Beta, ZSM-5, ZSM-12 and ZSM-35, and mesoporous molecular sieves of type MCM-41 and MCM-48, and these sieves modified with triethanolamine and ethylenediamine were obtained and characterized by XRD, FTIR, TGA and nitrogen adsorption. The adsorption tests were performed by the gravimetric method under a stream of CO2 at
Quím. Nova. Publicado em: 2014
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20. Zeólitas hierarquicamente estruturadas
This review presents the main characteristics and properties of microporous (zeolites) and ordered mesoporous materials, focusing on structural aspects and preparation. In addition, their use as heterogeneous catalysts are also discussed, with emphasis on their advantages and disadvantages. Due to difficulty in application of zeolites in the conversion of bu
Quím. Nova. Publicado em: 2013
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21. Estudo da captura de dióxido de carbono por misturas de hidróxido de cálcio e óxido de magnésio em baixas temperaturas
The present work has studied the carbonation reaction of hydrated lime modified by small percentages of magnesium dioxide (MgO) by the carbon dioxide (CO2) from the exhaust gas of a petrol engine. For this purpose, spherical pellets of solid adsorbents were synthesized and submitted to carbonation essays in a lab-scale fixed bed reactor. The samples conversi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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22. AdsorÃÃo de MolÃculas Sulfuradas AromÃticas em Adsorventes Mesoestruturados à Base de SÃlica. / Adsorption of aromatic sulfur molecules on mesostructured silica adsorbents.
The demand of a larger control in the emission of pollutants from automobiles, with a reduction in the emission of sulfur, has led to an intense research effort on techniques of sulfur removal from fuels. In the last few years, adsorption is thought to be a suitable polishing technique to achieve a deep desulfurization of streams from hydrodesulfurization (H
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/2011
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23. Study on properties of rice husk ash and its use as cement replacement material
This paper investigates the properties of rice husk ash (RHA) produced by using a ferro-cement furnace. The effect of grinding on the particle size and the surface area was first investigated, then the XRD analysis was conducted to verify the presence of amorphous silica in the ash. Furthermore, the effect of RHA average particle size and percentage on concr
Materials Research. Publicado em: 2010-06
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24. Tumor necrosis factor alpha increases epithelial barrier permeability by disrupting tight junctions in Caco-2 cells
The objectives of this study were to determine the effect of tumor necrosis factor alpha (TNF-α) on intestinal epithelial cell permeability and the expression of tight junction proteins. Caco-2 cells were plated onto Transwell® microporous filters and treated with TNF-α (10 or 100 ng/mL) for 0, 4, 8, 16, or 24 h. The transepithelial electrical resistance
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-04