Electroosmotic Conductivity
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Fundamentos, produção e aplicações de marcas térmicas em eletroforese capilar / Fundamentals, production, and applications of thermal marks in capillary electrophoresis
Em eletroforese capilar, a reprodutibilidade depende essencialmente da manutenção do sinal e no tempo de migração das espécies. A alteração do fluxo eletrosmótico (EOF) entre corridas é um dos principais fatores que afetam esses parâmetros. Nesse trabalho, é proposto um sistema de monitoramento do EOF baseado em marcas térmicas (TMs), que consist
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/08/2011
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2. Development of an external electroosmotic flow control system for capillary electrophoresis with contactless conductivity detection / Elaboração de um sistema de controle externo do fluxo eletrosmótico para eletroforese capilar com detecção condutométrica sem contato
This work presents the implementation, in an equipment for capillary electrophoresis (CE) with contactless conductivity detection (C4D), of a system for external control of the electroosmotic flow (EOF) via external radial voltage (Vrad). Through external potential, directly applied to the capillary, the electroosmotic flow can be controlled, because this pr
Publicado em: 2008
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3. Condutividade eletrosmótica e remediação de solos contaminados com cádmio via eletrosmose / Electroosmotic conductivity and remediation of cadmium contaminated soils via electroosmosis
O presente trabalho abordou a aplicação de fenômenos eletrocinéticos na remediação de solos, com um direcionamento ao emprego da eletrosmose na descontaminação de três solos da Zona da Mata Norte, estado de Minas Gerais, Brasil, contaminados com o elemento- traço cádmio. Buscou-se ampliar o horizonte de pesquisas já desenvolvidas na Universidade
Publicado em: 2008
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4. Determination of caffeine and identification of adulteration in coffee by capillary electrophoresis with capacitively coupled contactless conductivity detection / Determinação de cafeína e identificação de adulterações no café empregando a eletroforese capilar com detecção condutométrica sem contato
In this work, methods based on capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C4D) for the determination of caffeine in coffee as well as for the identification of its adulteration by addition of some other vegetal products were developed. Caffeine is a neutral species, and the proposed method was based on its mobi
Publicado em: 2006
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5. TRANSPORTE ELETROCINÉTICO DE GASOLINA E ÓLEO ATRAVÉS DE UM SOLO RESIDUAL GNÁISSICO E BORRA DE PETRÓLEO DA BACIA DE CAMPOS / ELECTROKINETIC TRANSPORT OF GASOLINE AND OIL THROUGH A GNAISSIC RESIDUAL SOIL AND OIL GOUND FROM CAMPOS BASIN
This study assesses the use of electrokinetics as an innovative technique for remediation of fine-grained soils. It relies on the application of an electrical potential through a soil mass, producing a series of coupled flows, including fluid flow -electroosmosis- and migration of ions. The first stage of the experimental program encompassed a series of test
Publicado em: 2002
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6. Passive water flows driven across the isolated rabbit ileum by osmotic, hydrostatic and electrical gradients.
Water flows generated by osmotic and hydrostatic pressure and electrical currents were measured in sheets of isolated rabbit ileum at 20 degrees C. Flows across the mucosal and serosal surfaces were monitored continuously by simultaneous measurement of tissue volume change (with an optical lever) and net water flows across one surface of the tissue (with a c
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7. Enhancement of charged macromolecule capture by nanopores in a salt gradient
Nanopores spanning synthetic membranes have been used as key components in proof-of-principle nanofluidic applications, particularly those involving manipulation of biomolecules or sequencing of DNA. The only practical way of manipulating charged macromolecules near nanopores is through a voltage difference applied across the nanopore-spanning membrane. Howe
American Institute of Physics.