Thermal Evaporation
Mostrando 25-36 de 65 artigos, teses e dissertações.
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25. Modelagem dos fenômenos de transporte termo-hídricos em meios porosos submetidos a temperaturas elevadas : aplicação a uma bicamada rocha-concreto
Concrete is an extremely complex material, whose properties are not yet fully understood. The diculties in describing and predicting the behavior of concrete structures are due to aspects related to the heterogeneity of medium - which is porous and multiphase - presenting uids in liquid and gas forms. When exposed to high temperature conditions, such diculti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2011
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26. Estudo Experimental de um Dessalinizador TÃrmico com Aquecimento Controlado / Experimental Study of a Thermal Desalination with Controlled Heating
Solar desalination systems operate with a transient heat source, the solar radiation, what makes it difficult to identify of the influence of the process variables and the constructive geometric parameters of the desalination tower. The present work presents the experimental study of thermal a desalination system prototype with heat recovery mechanism and co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/03/2011
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27. Tratamento superficial do aço inoxidável ferrítico com revestimento La0,6Sr0,4CoO3 para aplicação como interconectores em células a combustíveis do tipo ITSOFC
High-temperature solid oxide fuel cells (800-1000°C) are energy power generation, directly converting the chemical energy into electricity by combining fuel and oxygen. With the reduction of SOFC operating temperature into an intermediate temperature range of 600-800 °C, it has become possible to replace conventional ceramics with metallic alloys for inter
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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28. Obtenção de ZnO nanoestruturado e caracterização de propriedades e atividade fotocatalítica
Este trabalho versou sobre a obtenção de partículas nanoestruturadas de ZnO pela técnica de evaporação térmica a partir de zinco metálico. Basicamente, a síntese ocorria em um reator de quatzo colocado em um forno tipo mufla, onde o zinco metálico reagia com uma atmosfera oxidante, proporcionada pela injeção de ar comprimido. Inicialmente, o forn
Publicado em: 2011
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29. Thermal and mechanical properties of PVDF/PANI blends
Poly(vinylidene fluoride)/polyaniline blends of different composition were synthesized by chemical polymerization of aniline in a mixture of Poly(vinylidene fluoride) and N,N-dimethylformamide and their thermal and mechanical behavior was investigated as a function of the polyaniline doping level and the composition using thermogravimetric analysis, differen
Materials Research. Publicado em: 2010-12
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30. ESTUDO DAS PROPRIEDADES ELETROLUMINESCENTES DE NOVOS COMPLEXOS TETRAKIS BETA-DICETONATOS DE EURÓPIO UTILIZADOS EM OLEDS / INVESTIGATION ON ELECTROLUMINESCENT PROPERTIES OF NOVEL TETRAKIS BETA-DIKETONATE COMPLEXES USED IN OLEDS
Rare-earth complexes present extremely sharp line emission making possible to use them in organic light-emitting devices (OLEDs) technology. This dissertation reports the study of three europium tetrakis beta-diketonate complexes: Li[Eu(dbm)(4)].(4)H(2)O, TMPip[Eu(dbm)(4)] and Morf[Eu(dbm)(4)]. UV-Vis absorption, photoluminescence (PL) and cyclic voltammetry
Publicado em: 2010
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31. Sistema de captaÃÃo de energia solar para uma torre de dessalinizaÃÃo tÃrmica com recuperaÃÃo de calor / System of captation of solar energy for a tower of thermal dessalinizaÃÃo with heat recovery
This dissertation presents the experimental result of a system to absorb solar energy to heat up a desalination tower with heat recovery mechanism and a change made in the heated water distribution at the heat storage tank. The system to absorb solar energy consists of solar thermal flat plate collectors for high temperatures and it responsible for the conve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/09/2009
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32. Efeito do protetor solar sobre a fadiga durante a corrida com exposição ao sol
Sunscreens may be water and sweat resistant, but it is unknown if they affect the production, secretion and evaporation of sweat and, hence, impair human thermoregulation. During prolonged or mild duration exercises, mainly those carried out in hot environments, thermoregulation plays a key role in the development of fatigue. If sunscreens indeed interfere w
Publicado em: 2009
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33. AnÃlise da utilizaÃÃo de gargalos e fios de garrada pet como enchimento de torres de resfriamento
In some industrial processes, as well as in air conditioning processes, there is the need for cooling of equipments that generate heat during his operation. Usually, the fluid utilized to dissipate that generated heat is the water, due to its physical characteristics (high heat capacity, low viscosity, high thermal conductivity and high density). Besides its
Publicado em: 2009
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34. SÃntese e CaracterizaÃÃo de Filmes Finos de Ãxido de Zinco e Polianilina para AplicaÃÃes em HeterojunÃÃes Semicondutoras
Neste trabalho foi desenvolvido um processo de deposiÃÃo de filmes finos de Ãxido de zinco a partir do pà (ZnO) sobre substratos de vidro e semicondutores atravÃs da tÃcnica de evaporaÃÃo tÃrmica resistiva. Os filmes foram submetidos a tratamentos tÃrmicos em N2, Ar e O2 e posteriormente foram estudadas suas propriedades estruturais, topogrÃficas,
Publicado em: 2009
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35. Biological sensors based on immune response cells applied to the study of anti-allergic activity of natural compounds. / Utilização de sensores biológicos baseados em células de resposta imune no estudo da atividade antialérgica de substâncias naturais.
Anti-allergic activity of extracts and isolated compounds obtained from natural sources was investigated using the mast-cell based biosensor system. Mast cells release beta-hexosaminidase enzyme which is used as a marker of degranulation. Flavonoids (quercetin-Qc and rutin-Rt) and polyphenolic acids (caffeic acid-Cf and dimethoxy cinnamic acid-Dm) were used
Publicado em: 2009
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36. Processing of Rosmarinus officinalis linne extract on spray and spouted bed dryers
This article presents an investigation of the potential of spray and spouted bed technology for the production of dried extracts of Rosmarinus officinalis Linné, popularly known as rosemary. The extractive solution was characterized by loss on drying, extractable matter and total phenolic and flavonoid compounds (chemical markers). The product was character
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03