Systems Out Of Equilibrium
Mostrando 1-12 de 64 artigos, teses e dissertações.
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1. Avaliação do uso de argilas montmorilonitas modificadas na adsorção de nitrato em meio aquoso
RESUMO Este estudo investigou a eficiência da remoção de nitrato em meio aquoso usando adsorção em argilas montmorilonitas comerciais, comparativamente a uma resina aniônica comumente usada nessa operação. Algumas dessas argilas foram intercaladas como o íon hexadeciltrimetilamônio para avaliação. Áreas superficiais específicas, capacidades de
Eng. Sanit. Ambient.. Publicado em: 21/03/2019
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2. STUDY OF BINARY AND SINGLE BIOSORPTION BY THE FLOATING AQUATIC MACROPHYTE Salvinia natans
Abstract The performance of Salvinia natans macrophyte to recover lead and chromium from single and bicomponent solutions in batch and fixed bed systems was investigated. Equilibrium data were obtained through isotherms and fitted to Langmuir, Freundlich and D-R models for a single component system. In the fixed bed study the breakthrough curves were carried
Braz. J. Chem. Eng.. Publicado em: 2016-09
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3. Equilibrium and Out-Of-Equilibrium Investigation of Proton Exchange and CuII and ZnII Complexation on Fungal Mycelium (Trametes hirsuta)
This work presents potentiometric investigations of [mycelium/metal ion/water] complex systems and the development of a new model investigating the ion-mycelium-fluid interactions. Since pH is a major parameter in soil ecology exhibiting large fluctuations, we proposed an improved equilibrium and also out-of-equilibrium potentiometric titration method in ord
J. Braz. Chem. Soc.. Publicado em: 2016-01
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4. On the relationship between the solubility of proteins and the osmotic second virial coefficient
A relationship between the osmotic second virial coefficient of proteins in aqueous salt solutions, the solubility of proteins in these solutions and the salt concentration is presented. The model developed considers that the solid-liquid equilibrium is established with neutral protein molecules and that the relationship between the protein solubility and th
Braz. J. Chem. Eng.. Publicado em: 2013-03
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5. On dynamic self-organization: examples from magmatic and other geochemical systems
Standard Liesegang banding is the display of parallel bands of precipitate formed periodically when co-precipitate ions interdiffuse in a gel medium. The most striking resemblance with Liesegang patterns in Nature lies in the diverse scenery of banded textural features commonly observed in some geological materials, such as geodes, agates, malachites, as wel
Lat. Am. j. solids struct.. Publicado em: 2013-01
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6. Controle de Corrente de Spin em Pontos Quânticos na Presença de Tensões de Porta Moduladas no Tempo
Since Loss &DiVincenzo proposal to use confined electron spins in quantum dots (QDs) as a building block for qubits in solid state systems, spin-dependent transport in QDs has attracted a lot of attention. The interest for this system increased even further with the recent experimental developments to coherently control (initialization-manipulation-read out)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2011
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7. Kinetic analysis of batch ethanol acetylation in isothermal non-stationary multiphase systems by lyophilized mycelium of Aspergillus oryzae
A relatively complex network of reactions has been investigated, using as a network model the isothermal batch esterification of acetic acid with ethanol in n-heptane catalyzed by lyophilized mycelium of Aspergillus oryzae. The kinetic analysis was firstly carried out on the whole system, without any simplification, by means of the well-known integral method
Brazilian Journal of Microbiology. Publicado em: 2011-03
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8. Simulações de sensores de gás nanoscópicos baseados em nanotubos de carbono: estrutura eletrônica e transporte de elétrons / Computational simulations of nanoscopic gas sensors based on carbon nanotubes: electronic structure and electronic transport
Since their discovery by S. Iijima in 1991, carbon nanotubes have been considered as one of the most promising nanostructured materials for the development of new nanoscopic electronic devices. Due to its high surface area to volume ratio, this material stands out as a candidate for possible gas sensoring applications. In this thesis, we have studied, by mea
Publicado em: 2011
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9. Essays on the general equilibrium effects of barriers to trade on economic growth, foreign trade and the location of economic activity in Brazil
This work presents a fully operational interstate CGE model implemented for the Brazilian economy that tries to quantify both the role of barriers to trade on economic growth and foreign trade performance and how the distribution of the economic activity may change as the country opens up to foreign trade. Among the distinctive features embedded in the model
Publicado em: 16/04/2010
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10. ESTUDO TEÓRICO DE ESTRUTURA, PROPRIEDADES E REATIVIDADE DE TRIGLICERÍDEOS E ÉSTERES DE ÁCIDOS GRAXOS ENVOLVIDOS NA PRODUÇÃO E COMPOSIÇÃO DO BIODIESEL
The present work aims the study of structural and thermodynamic properties for process involving triglycerides (TG), fatty acid esters (EAG) and biodiesel through theoretical and chemometrical methodologies. The study of the transesterification reaction of triglycerides (TG) using cyclodextrin (CD) as a potential catalyst were also carried out. Initially, th
Publicado em: 2010
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11. Controle supervisÃrio da cadeia produtiva do biodiesel da mamona baseado em redes de Petri / Supervisory control of castor bean biodiesel suppy chain based on Petri nets
Nowadays many countries present critical problems related to energy demand-supply equilibrium. The reserves of petroleum-based products are unable to face future demand for the next decades. So, the search for alternative sources of energy has been strongly directed to biodiesel. Several fruit oils can be used as a source for biodiesel production and the cas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/09/2009
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12. Liquid-liquid equilibrium data for the system composed of refined rice bran oil / anhydrous ethanol / water / hexane / Determinação de dados de equilibrio liquido-liquido de sistemas contendo oleo de farelo de arroz refinado / etanol anidro / agua / hexano
The extraction of oil from rice bran aggregates value to the rice production. This oil has nutritional and nutraceutical properties, therefore, the interest of the industries in its use. The oil deacidification can be carried out by liquid¿liquid extraction with lower loss of neutral oil, mainly in the case of oil with high content of free fatty acid. In th
Publicado em: 2009