Microsensor
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Evaluation of piezoresistivity properties of sputtered ZnO thin films
Zinc oxide (ZnO) thin films were deposited by RF reactive magnetron sputtering on silicon (100) substrates under different experimental conditions. ZnO films were studied before and after annealing treatment at 600 °C. The crystallinity, electrical resistivity, stoichiometry, thickness, and elastic modulus of the films were investigated. ZnO piezoresistors
Mat. Res.. Publicado em: 03/06/2014
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2. Study of electrochemical detection, using modified electrodes policinilina in view the development of microsensors for the detection of food additives / Estudo da detecção eletroquimica, empregando eletrodos modificados com policinilina, tendo em vista o desenvolvimento de microssensores para a detecção de aditivos alimentares
This work presents a study for development of a microsensor for electrochemical analysis that can be applied in detection of food additives as sulfites and ascorbic acid. The development of low cost electrochemical instrumentation as alternative for commercial instrumentation available is a solution for any problems that appear in electrochemical sensors res
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/12/2009
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3. Construction of microsensors and its application in biofilms used in wastewater treatment / Construção de microssensores e sua aplicação para estudo de biofilme empregado no tratamento de água residuária
The goal of the current research was the construction of amperometric and potentiometric microsensors to measure dissolved oxygen (DO), hydrogen sulfide (H IND.2S), nitrite, nitrate, ammonium and pH in biofilms applied at wastewater treatment. The biofilms that were analyzed with the constructed microsensors were grown at the surface of flat-plate reactors,
Publicado em: 2009
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4. Oxygen mass transfer for an immobilised biofilm of Phanerochaete chrysosporium in a membrane gradostat reactor
A novel system, the membrane gradostat reactor (MGR), designed for the continuous production of secondary metabolites, has been shown to have higher production per reactor volume than batch culture systems. The MGR system mimics the natural environment in which wild occurring microorganism biofilms flourish. The biofilms are immobilised on the external surfa
Brazilian Journal of Chemical Engineering. Publicado em: 2008-12
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5. Capacitive microsensor for evaluation of the quality of automotive fuels. / Micro-sensor capacitivo para avaliação da qualidade de combustíveis automotivos.
This work proposes a capacitive sensor with interdigitated electrodes in order to evaluate the quality of automotive fuel. Interdigitated electrodes have some interesting features for this type of sensor. Among them, they increase the capacitance by having several capacitors in parallel, and by having a structure feasible to be manufactured by conventional m
Publicado em: 2008
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6. Reator de leito expandido em escala plena com zonas anaeróbia e aeróbia sobrepostas: remoção conjunta de matéria orgânica e nutrientes e estudo do comportamento microbiológico do biofilme, por respirometria e microsensor de OD / Full scale expanded bed reactor with overlaid anaerobic and aerobic zones: joint removal of organic matter and nutrients and the study of microbiological biofilm behavior and DO microsensor
The current research aimed the development of a 159 M POT.3total volume biological reactor, with a expanded and partially aerated granular coal bed (activated and anthracite), to promote organic matter and nutrients (N and P) removal from wastewater due to the maintenance of anaerobic and aerobic environments, stratified throughout the height of the reactor
Publicado em: 2007
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7. Strategies of operation of aerobic/anoxic sequential batch reactors for industrial wastewater nitrogen removal / Estratégias de operação de reatores aeróbio/anóxico operados em batelada sequencial para remoção de nitrogênio de água residuária industrial
A pesquisa propôs avaliar o desempenho e o comportamento de reatores seqüenciais em batelada com biomassa suspensa e imobilizada, em escala de bancada, na remoção de compostos de nitrogênio. Tais sistemas foram testados como tratamento complementar de reatores sulfetogênico e metanogênico utilizados no tratamento de água residuária industrial com al
Publicado em: 2007
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8. Glucose microsensor integrated into a catheter / Microssensor para glicose integrado a catéter
The development of electrochemical sensors for glucose integrated into catheters has as basic requisite its miniaturization and the requirement of functioning for relatively long periods in the intravenous environment. The function of such sensors is the continuous monitoring on real time of the clinical evolution of patients hospitalized in intensive therap
Publicado em: 2007
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9. Experiments on the fundamental mechanisms of boiling heat transfer
The lecture presents a survey of results found by the author and his team during recent years. An experimental technique for precise and systematic measurements of entire boiling curves under steady-state and transient conditions has been developed. Pool boiling experiments for well wettingfluids and fluids with a larger contact angle (FC-72, isopropanol, wa
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-03
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10. Detector de espectro de frequÃncia com varredura inteligente para circuito ressonante passivo injetÃvel
Esta dissertaÃÃo de mestrado apresenta um sistema detector de frequÃncias com varredura inteligente, para utilizaÃÃo na aquisiÃÃo deste parÃmetro
Publicado em: 2003
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11. Combined Oxygen and Nitrous Oxide Microsensor for Denitrification Studies
The construction of a microsensor which can be used to measure O2 and N2O simultaneously is described. The microsensor exhibited a linear response to both O2 and N2O, and the response to N2O was independent of the O2 concentration and vice versa. The N2O detection limit of a microsensor with a tip diameter of 20 μm was around 1 μmol liter−1. The signals
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12. Microsensor Analysis of Oxygen in the Rhizosphere of the Aquatic Macrophyte Littorella uniflora (L.) Ascherson.
Oxygen released by the roots of submerged plants may oxidize organic compounds from the roots and reduced substances continuously supplied by diffusion from the surrounding anoxic hydrosoil. We provide here the first visualization of this gradient environment obtained by microsensor analysis of oxygen in the rhizosphere of the freshwater plant Littorella uni