Flow Loop Analysis
Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. Experimental study of histological changes in vascular loops according to the duration of the postoperative period: Application in reconstructive microsurgery
OBJECTIVES: To analyze the histological changes observed in venous grafts subjected to arterial blood flow as a function of the duration of the postoperative period to optimize their use in free flap reconstructions. METHOD: Twenty-five rats (7 females and 18 males) underwent surgery. Surgeries were performed on one animal per week. Five weeks after the fi
Clinics. Publicado em: 2017-09
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2. Determinação eletroquímica de glicerol em biodiesel por amperometria de múltiplos pulsos com eletrodo de ouro
Biodiesel is the fuel obtained from vegetable oils or animal fats that can partially or totally replace diesel oil. Besides being obtained from renewable sources, biodiesel is less polluting than diesel and biodegradable. One disadvantage of biodiesel is the byproduct of transesterification reaction of raw material, glycerol, which can cause damages to combu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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3. Characterization of gas-liquid parameters in a down-flow jet loop bubble column
In order to characterize the gas-liquid parameters of a down-flow jet loop reactor, experiments were carried out to study the gas holdup, bubble sizes and their distribution, mass transfer area and mass transfer coefficient. The experiments were performed in the bubbly flow regime because of its stability and uniformity. Analysis of experimental data showed
Brazilian Journal of Chemical Engineering. Publicado em: 2010-06
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4. Power and efficiency performances of a micro thermal Brownian heat engine with and without external forces
Power and efficiency performances of a thermal Brownian heat engine, which consists of Brownian particles moving in a periodic sawtooth potential with and without external forces and contacting with alternating hot and cold reservoirs along the space coordinate, are studied in this paper. The performance characteristics are obtained by numerical calculations
Brazilian Journal of Physics. Publicado em: 2010-06
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5. Análise da eficiência energética do sistema de condicionamento de ar com distribuição pelo piso em ambiente de escritório, na cidade de São Paulo, utilizando o modelo computacional Energyplus. / Energy efficiency analysis of underfloor air distribution (ufad) system for office rooms, at São Paulo city, using the ENERGYPLUS software.
The purpose of this research is to evaluate the energy performance of the Underfloor Air Distribution (UFAD) system at office buildings, considering different air loops design and economizer cycles while keeping thermal comfort for the weather data of São Paulo city, Brazil. Simulations were held using the EnergyPlus software version 2.1.0.023, since its nu
Publicado em: 2008
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6. A agroindústria canavieira de Mato Grosso do Sul e a dinamica de sua expansão
This study aimed to examine how Agribusiness Sugar presents his case for expansion of Mato Grosso do Sul, and thereby becoming economic activity with the greatest growth found. The main product of the activity today is the ethanol (alcohol fuel) by experts considering the new source of renewable fuels under development. And because the state has one of privi
Publicado em: 2008
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7. Controle e monitoramento em tempo real do regime de jorro estavel atraves da analise espectral / Control and monitoring on line of the steady regime in the spouted bed process by spectral analysis
This work describes the control and on line monitoring of the spouted bed steady regime using the gas-solid contact regimes identification method by pressure measurements. The work presents two main features: 1) the on line identification of fluid dynamic regimes in the spouted bed process based in the spectral analysis of the pressure fluctuations and 2) th
Publicado em: 2006
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8. Near infrared spectroscopy employment in the petroleum feed stream characterization of an atmospheric distillation process. / Aplicação da espectroscopia de infravermelho próximo na caracterização da carga de petróleo para o processo de destilação atmosférica.
The knowledge of the petroleum composition and its products is an indispensable tool in a refinery for the process conditions settlement. The Near Infrared Spectroscopy (NIR) presents-itself as a helpful tool that attends to this need, because of its high potential and applications. In this context, it was developed the experimental methodology for NIR spect
Publicado em: 2006
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9. Determinação enzimática de dopamina em formulações farmacêuticas utilizando sistema de análise por injeção em fluxo com extrato bruto de abacate (Persea americana)
In this work, a spectrophotometric flow injection analysis system using a crude extract of avocado (Persea americana) as a source of polyphenol oxidase to dopamine determination was developed. The substrates and enzyme concentrations from 2.4x10-7 to 5.3x10-4 mol L-1 and 28 to 332 units mL-1 were evaluated, respectively. In addition, the FIA parameters such
Química Nova. Publicado em: 2003-03
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10. Simulação computacional de eventos termo-hidraulicos transitorios em multicircuitos com multibombas
PANTERA-2 (from Programa para Análise Termo-hidráulica de Reatores a ÁguaProgram for Thermal-hydraulic Analysis of Water Reactors, Version 2), whose fundamentals are described in this work, is intended to carry out rod bundle subchannel analysis in conjunction with multiloop simulation. It solves simultaneously the conservation equations of mass, axial an
Publicado em: 2003
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11. Determinação de Sb (V) em medicamentos antileishmanioticos por extração liquido-liquido em sistema automatizado de analise em fluxo
In this work a selective method for the Sb (V) determination in antileishmaniotics drugs is proposed, based on the extraction of an ion pair formed between hexachloroantimoniate anion and the rhodamine a cation in an automated liquid-liquid extraction flow analysis system (LLE-FA). The ion-pair was formed in hydrochloride acid and as solvent toluene was empl
Publicado em: 2003
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12. Injetor multicanal com válvulas de estrangulamento para análise em fluxo
An important component for the automation of flow injection analysis (FIA) systems is the sample injection valve. A simple and inexpensive commutator with 16 pinch valves (8 normally open and 8 closed) was developed and configured as a multichannel injection valve. It is activated by a single solenoid of 3 Kgf, powered by a pulsed driver circuit, controlled
Química Nova. Publicado em: 2001-10