Separating Equilibrium
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Simulation of ethanol extractive distillation with mixed glycols as separating agent
Extractive distillation is an alternative for ethanol dehydration processes that has been shown to be more effective than azeotropic distillation and, in close proximity, to be very competitive against the process that uses adsorption with molecular sieves. Glycols have been shown to be the most effective solvents in extractive distillation, mainly ethylene
Braz. J. Chem. Eng.. Publicado em: 2014-03
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2. Interação entre política fiscal e monetária, independência do Banco Central e competição eleitoral : uma abordagem de teoria dos jogos
Based in a model that considers the interactions between monetary and fiscal policy and the role of societys expectations about the price level we study the relevance of central bank independence and the electoral effects created by an opportunistic policymaker using the framework of Game Theory in settings of complete and asymmetric information. Under compl
Publicado em: 2008
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3. Population genetic analysis of Caiman crocodilus (Linnaeus, 1758) from South America
The genetic structure of Caiman crocodilus was investigated using a 1085 bp mtDNA fragment of the cytochrome b gene. Inferences were based on 125 individuals from nine localities in Peru, Brazil and French Guiana. With the exception of Mamirauá Lake, Anavilhanas Archipelago and the Tapará Community which show a signal of demographic expansion, the sampled
Genetics and Molecular Biology. Publicado em: 2006
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4. Anatomical study of the cerebellum of the Cebus apella monkey / Estudo anatômico do cerebelo do macaco Cebus apella
The gender Cebus, represented by four species and several subspecies, its found geographically distributed since Central America up to the south of South America however, its anatomy is still little well-known. Its from easy adaptation and can survive in small forests and restingas, but the continuous destruction of its habitat has been threatening, in a pro
Publicado em: 2005
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5. Política de dividendos e juros sobre o capital próprio : um modelo com informação assimétrica
A dissertação trata do problema de política de dividendos com informação assimétrica. Discutiu-se sobre os pagamentos de dividendos e Juros Sobre o Capital Próprio no Brasil. Foi compatibilizado um modelo, que foi desenvolvido inicialmente com base na realidade americana (Allen Bernardo & Welch), para a realidade institucional brasileira. Para isso, h
Publicado em: 24/03/2003
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6. Projeto otimizado de uma unidade de air stripping para remover VOCs clorados de aguas residuarias
At present, it is more and more common to find water resources contaminated by substances resulting from anthropogenic activities, especially those originating from of the discards of industrial processes. These chemicals usually represent a threat to human health and to aquatic ecosystems equilibrium. The effects are still more harmful when such substances
Publicado em: 2002
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7. Lattice model of replicators: aplication on prebiotic models and herpes ulcer / Dinâmica de replicação na rede: aplicações em modelos de evolução pré-biótica e de formação de úlceras
Two fundamental questions in the study of prebiotic evolution (origin of life) are concerned to the requisites for the persistence of small colonies of self-replicating molecules (replicators) and to the possibility that complex organisms evolve from simpler organisms as a result of mutations. These issues have been studied mainly in the chemical kinetics fo
Publicado em: 2001
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8. Equilibrium data on ethanol-water-solvent ternaries
Experimental liquid-liquid equilibria of water-ethanol-1-nonanol and water-ethanol-1-decanol systems were investigated at 303.16± 0.20 K. The reliability of the experimental tie-line data was ascertained by using Othmer-Tobias and Hand plots. Distribution coefficients (Di) and separation factors (S) were evaluated for the immiscibility region. It is conclud
Brazilian Journal of Chemical Engineering. Publicado em: 2000-06
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9. A FORMULATION OF THE SURFACE TENSION THEORY WITH APPLICATIONS TO FREE BOUNDARY PROBLEMS / UMA FORMULAÇÃO DA TEORIA TENSÃO SUPERFICIAL COM APLICAÇÕES A PROBLEMAS DE FRONTEIRA LIVRE
This work was originated with an industrial problem, the process of coating of rods with a enamel. The task was described mathematically the process such as it can be controlled, in order to avoid losses and to optimating the production. In this work the problem is formulated and solved. Furthermore, a theory of interfaces is formulated, like that exist in f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/10/1991
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10. Introducing dielectrophoresis as a new force field for field-flow fractionation.
We present the principle of cell characterization and separation by dielectrophoretic field-flow fractionation and show preliminary experimental results. The operational device takes the form of a thin chamber in which the bottom wall supports an array of microelectrodes. By applying appropriate AC voltage signals to these electrodes, dielectrophoretic force
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11. Isolation by Distance in a Quantitative Trait
Random genetic drift in a quantitative character is modeled for a population with a continuous spatial distribution in an infinite habitat of one or two dimensions. The analysis extends Wright's concept of neighborhood size to spatially autocorrelated sampling variation in the expected phenotype at different locations. Weak stabilizing selection is assumed t
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12. Calcium-dependent effect of the thymic polypeptide thymopoietin on the desensitization of the nicotinic acetylcholine receptor.
The effects of the thymic polypeptide thymopoietin (Tpo) on the properties of the nicotinic acetylcholine receptor (AcChoR) were investigated by patch clamp techniques on mouse C2 myotubes and by biochemical assays on AcChoR-rich membrane fragments purified from the Torpedo marmorata electric organ. At high concentrations (greater than 100 nM), Tpo inhibits