Microfluidic Devices
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Single-Layered Paper-Based Microfluidic Devices Made by Paint-Spraying Technique with Great Barrier Resistance for Colorimetric Assays
The single-layered paint-spraying paper based microfluidic devices (sp-μPADs) have been for the first time integrated with the colorimetric assay. The polymethyl methacrylate (PMMA) board was applied as the mask instead of the iron mask, reducing the power requirement of the cutting machine. The paint was sprayed into the paper, which blocked the pores of t
J. Braz. Chem. Soc.. Publicado em: 2021-03
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2. Design and analysis of different models of microfluidic devices evaluated in Enhanced Oil Recovery (EOR) assays
ABSTRACT Microfluidic devices are a new platform for Enhanced Oil Recovery (EOR) assays. The application of Colloidad Dispersion Gels (CDG) injection method has been proposed in recent years. However, the mechanism of oil recovery enhancement has not been completely elucidated. Its purpose is to mobilize oil by decreasing the permeability of channeled zones.
Matéria (Rio J.). Publicado em: 19/07/2018
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3. PROTOTIPAGEM DE MICRORREATORES FOTOCATALÍTICOS E TESTES DE FOTODEGRADAÇÃO DE CORANTES ORGÂNICOS
A photocatalytic microreactor is defined as a microfluidic device, which is integrated with a photocatalytic coating of TiO2 deposited on the inner surface of microchannels. This device is capable of degradation of organic dye solution in water in a continuous flow under the action of ultraviolet light. The objectives of this work were to prese
Quím. Nova. Publicado em: 2015-07
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4. Desenvolvimento de processo microfluídico para incorporação de DNA em lipossomas catiônicos destinados a terapia e vacinação gênica = : Development of microfluidic process for DNA incorporation into cationic liposomes for gene therapy and vaccination / Development of microfluidic process for DNA incorporation into cationic liposomes for gene therapy and vaccination
This research aimed at the technological development of microfluidic process for nonviral carriers production based on the electrostatic complexation between cationic liposomes (CL) and plasmidal DNA (pDNA) for gene and vaccine therapy applications. The development of this process was compared to the conventional bulk process, in which the solutions are mixe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2012
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5. Electrochemical detection of Pb and Cd in paper-based microfluidic devices
Tiras de papel de filtro combinadas com eletrodos de carbono impresso (SPCE) foram usadas na montagem de um dispositivo microfluídico para detecção de Pb(II) and Cd(II) em soluções aquosas. O dispositivo microfluídico portátil (com detecção eletroquímica direta) foi testado na quantificação direta de analitos (Pb(II) e Cd(II)) em amostras aquosas
Journal of the Brazilian Chemical Society. Publicado em: 2012-06
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6. Desenvolvimento de dispositivos eletroquímicos descartáveis para análises rápidas / Development of disposable electrochemical devices for rapid analysis
This paper presents the efforts to the construction and characterization of electrochemical transducers on polyester and paper, and also demonstrates the use of these disposable electrochemical cells in the development of a biosensor for rapid analysis of salicylate in blood as well as the creation of a separation device associated electrochemical detection
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/08/2010
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7. Environmentally responsive polymeric "intelligent" materials: the ideal components of non-mechanical valves that control flow in microfluidic systems
Miniaturization and commercialization of integrated microfluidic systems has had great success with the development of a wide variety of techniques in microfabrication, since they allowed their construction at a low cost and by following simple step-series procedures. However, one of the major challenges in the design of microfluidic systems is to achieve co
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
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8. Detecção condutométrica sem contato: uma nova ferramenta para monitoramento de interações biomoleculares em microssistemas analíticos / Contactless conductivity detection: a new tool for monitoring biomolecular interactions on analytical microsystems
The study reported in this thesis shows the application of a capacitively coupled contactless conductivity detection (C4D) for monitoring biomolecular interactions on analytical microsystems. Initially, the analytical performance of the microsystems fabricated in glass, poly(dimethylsiloxane) (PDMS) and polyester-toner (PT) was investigated in order to choos
Publicado em: 2008
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9. Novas tecnologias para fabricação de microsistemas analíticos e detecção eletroquímica / New technologies for the fabrication of microluidic devices with electrochemical detection
Este trabalho de doutorado apresenta o desenvolvimento de novas tecnologias para fabricação de microsistemas analíticos e detecção eletroquímica. Primeiramente, a poliuretana elastomérica, derivada de uma fonte renovável, o óleo de mamona, foi utilizada como um novo e alternativo material para fabricação de microdispositivos. Foram avaliadas as ca
Publicado em: 2008
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10. Microssistemas de análises químicas: introdução, tecnologias de fabricação, instrumentação e aplicações
The amazing world of micro total analysis systems has provided a true revolution in analytical chemistry in recent years. The application of the microfluidic devices for chemical and biochemical processing has attracted considerable interest due to its advantages such as reduced sample and reagent consumption, processing time, energy, waste, cost, and portab
Química Nova. Publicado em: 2007
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11. Desenvolvimento de instrumentação para eletroforese capilar de zona e isotacoforese capilar em microdispositivos de toner-poliéster / Development of instrumentation for capillary zone electrophoresis and capillary isotachophoresis using toner-polyester microdevices
A eletroforese capilar em microchips (µCE ou MCE) é uma forma diferente de eletroforese capilar que tem se desenvolvido muito nos últimos anos. Essa técnica usa microdispositivos feitos em placas que podem ser de vidro ou polímero contendo canais de dimensões micrométricas ao invés de um capilar de sílica. Ganhos significativos têm sido obtidos em
Publicado em: 2005
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12. Permeation-driven flow in poly(dimethylsiloxane) microfluidic devices
Poly(dimethylsiloxane) is currently the material of choice for rapidly fabricating microfluidic devices. As the size of these devices decreases, a significant hydrodynamic flow is generated due to permeation of fluid through the channel walls. We develop a theoretical model verified by single bead tracking experiments, which demonstrates that large flow rate
National Academy of Sciences.