Incrustation
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Experimental study of fluidized bed agglomeration of acerola powder
The aim of this work was to study the main effects of acerola powder on fluidized bed agglomeration. A 2(4-1) fractional factoring design was used to evaluate the main operating conditions (fluidizing air temperature, fluidizing air velocity, atomizing air flow and height of nozzle in the bed). The mechanical and physicochemical product changes were determin
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03
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2. Uso do silicone e poliuretano na uretroplastia dorsal: estudo experimental em coelhos / The silicone and polyurethane used in dorsal on lay urethroplasty: experimental study in rabbits
BACKGROUND: Actually, the treatment of urethral stenosis employs biological grafts, usually autologous grafts. The success with synthetic biomaterials in others medical specialtys motivated the search of these materials in urethral reconstruction. The knowledge about the silicone mamarian prosthesis covered with polyurethane foam reduces capsular contracture
Publicado em: 2008
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3. Abrasão, desgaste e atrito sob deslizamento de recobrimentos preparados por aspersão térmica a partir de PET pós-consumo
This work intends to contribute to the development of polymer coatings by combustion thermal spraying of recycled poly(ethylene terephthalate) PET for the improvement of the tribological behavior of carbon steel piping. Coatings with high wear resistance may reduce corrosion, the formation of organic and inorganic deposits, and the friction of the transporte
Publicado em: 2008
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4. Determinação do teor de edta remanescente em soluções de limpeza de equipamentos industriais
Cleaning solutions containing EDTA are widely employed to remove incrustation despite of the costs involved. The free content of EDTA in commercial solutions may be determined by mixing an aliquot to ammonium oxalate and using a standard calcium solution as titrant. The end-point is detected by the formation of insoluble calcium oxalate after all EDTA is com
Química Nova. Publicado em: 2007-08
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5. Caracterização tafonômica das concentrações fossilíferas da Formação Cape Melville, Grupo Moby Dick (Mioceno Inferior), Ilha Rei George, Antártica / Taphonomic characterization of fossil concentrations from the Cape Melville Formation, Moby Dick Group (Early Miocene), King Georg Island, Antactica
Works focusing on the taphonomy of fossil concentrations generated in glacial or periglacial environment are rare. In this context, the present dissertation carried out the taphonomic characterization of the fossil concentrations of the Cape Melville Formation, Moby Dick Group (Lower Miocene), King George Island, Antarctica, in order to elucidate the genesis
Publicado em: 2007
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6. Ser-espelho: modos de atração e desvio
The present research considers to create an interlocution between the subject of the mirrors and their philosophical aspects, their relations with history of the art, the image and the look, as well as establishing possible reverberation in the personal plastic trajectory. It is about raising the apparent existing paradox between the concept of attraction an
Publicado em: 2007
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7. Mapeamento de recifes no Rio Grande do Norte: Touros e Macau/RN / Mapeamento de recifes no Rio Grande do Norte: Touros e Macau/RN
Studies on the Brazilian continental shelf were developed between Touros and Macau-RN (NE Brazil) with the aim to mapping carbonate buildups, and especially, reef ecosystems. Remote sensing, submarine movies, bathymetric survey and diving were the methods used. This paper will focus on three main aspects of the Rio Grande do Norte reefs: 1) characterization
Publicado em: 2006
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8. Study of sodium chloride scaling in salt dissolver of a chlor-alkali plant / Estudo da incrustação em saturador de cloreto de sódio em unidade de produção de cloro-soda.
In the chlor-alkali industry, a Salt Dissolver has the objective of producing brine saturated in sodium chloride to feed electrolytic cells. However, the Dissolver studied in this work presented an incrustation of 1.5 meters of thickness, formed during nine years of operation. Many samples were collected in distinct positions of the equipment to allow proper
Publicado em: 2005
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9. Estudo da granulação de suco de acerola desidratado em leito fluidizado. / Study of the granulation of dehydrated acerola juice in fluidized stream bed.
The objective of this work was to study the modifications in the physical properties of acerola powder, dried in spray dryer, by wet-agglomeration process in fluidized bed. The equipment used was a batch fluidized bed built in acrylic material. To study of the principal variables in granulation process, a fractional factorial design was used as statistical t
Publicado em: 2005
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10. Use of small intestine submucosa as ureteral allograft in pigs
PURPOSE: The aim of the present study was to evaluate the biocompatibility of small intestine submucosa (SIS) in the reconstruction of the ureter in swine. MATERIALS AND METHODS: An experimental study was performed in 10 half-breed pigs weighing between 20 and 30 K, in which a previously prepared segment of SIS measuring approximately 2.0 cm was implanted in
International braz j urol. Publicado em: 2004-08
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11. Análise de Sensibilidade Topológica / Topological Sensitivity Analysis
The Topological Sensitivity Analysis results in a scalar function, denoted as Topological Derivative, that supplies for each point of the domain of definition of the problem the sensitivity of a given cost function when a small hole is created. However, when a hole is introduced, it is no longer possible to stablish a homeomorphism between the domains. Due t
Publicado em: 2003
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12. Anatomia comparativa dos orgãos vegetativos de Dahlstedtia Malme (Leguminose, Papilionoideae)
Dahlstedtia (Leguminosae, Papilionoideae) is a neotropical genus, native trom southern brazilian Atlantic Forest, with two species D. pinnata and D. erythrina. The internal structure of vegetative organs of its was described and compared as a taxonomic aid to both of them. There was a strong anatomical resemblance in the genus. In the leaf, the epidermal cel
Publicado em: 1996