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Publicações - engenharias

Voltammetric Anodic Dissolution (VAD) Applied to the Quantitative Analysis of Coating Discontinuities - Influence of Electrodeposition Process Parameters Haroldo de Ara[ujo Ponte; Ana Carolina Tedeschi Gomes; Alexandre Michel Maul; JERÔNIMO DE SANTANA PONTE, MARIA JOSÉ Journal of Applied Electrochemistry, v. 34, p. 147-150, 2004 Palavra-chave: Analise de porosidade; Revestimentos eletroquímicos; Medida de descontinuidades Áreas do conhecimento: Engenharias; Metalurgia Física; Corrosão resumo ...
Xanthan gum production from cassava bagasse hydrolysate with xanthonomas campestris using alternative sources of nitrogen Adenise Lorenci Woiciechowski; Carlos Ricardo Soccol; Saul Nitsche da Rocha; Ashok Pandey Applied Biochemistry and Biotechnology, v. 118, p. 253-258, 2004 Palavra-chave: xanthan gum production; polissacarídeos; cassava bagasse hydrolysis; acid hydrolysis Áreas do conhecimento: Engenharias; ENGENHARIA DE BIOPROCESSOS resumo ...
XANTHAN GUM PRODUCTION FROM CASSAVA BAGASSE HYDROLYSATE WITH XANTOMONAS CAMPESTRRIES USING ALTERNATIVE SOURCES OF NITROGEN Adenise Lorenci Woiciechowski; Carlos Ricardo Soccol; Saul Nitsche da Rocha; Ashok Pandey Applied Biochemistry and Biotechnology, v. 118, p. 305-312, 2004 Áreas do conhecimento: Engenharias; ENGENHARIA DE BIOPROCESSOS resumo ...
XPS characterization of anodic titanium oxide films grown in phosphate buffer solutions Claudia E. B. Marino; Sonia Regina Biaggio; Romeu Cardozo rocha filho; Nerilso Bocchi; Pedro Augusto de Paula Nascente THIN SOLID FILMS, v. 468, n. 1-2, p. 109-112, 2004 DOI Palavra-chave: TITÂNIO; óxido galvanostático; XPS Áreas do conhecimento: Ciências Exatas e da Terra; Físico-Química; Eletroquímica; Engenharias; Engenharia de Materiais e Metalúrgica; Metalurgia Física; Corrosão resumo ...
Xylanase mass transfer studies in aqueous two-phase systems using spray and sieve plate columns Luciana Igarashi Mafra; Theo Kieckbusch; TELMA T FRANCO Bioprocess and Biosystems Engineering (Print), v. 26, p. 151-157, 2004 DOI Home page Palavra-chave: xylanase, mass transfer, aqueous two-phase systems Áreas do conhecimento: Engenharias; Engenharia Elétrica; Telecomunicações resumo ... Aqueous two-phase systems (ATPSs) have long been used for biomolecule partitioning; these systems offer the possibility of using continuous or semicontinuous extraction processes. They require relatively simple equipment like spray or sieve plate columns that can be adapted for use in ATPSs. The aim of this work was to study the semicontinuous extraction of a model enzyme, xylanase, in spray and sieve plate columns, since, unlike centrifugal contactors, the cost of construction and maintenance of this equipment is low and it is easy to operate. For the spray column, the dispersed phase hold-up and overall mass transfer coefficients K D a were evaluated for different column heights and for different superficial velocities of the dispersed phase (light phase). Results indicated that an increase in superficial velocity in the range of 0–0.18 mm/s of the dispersed phase had a positive effect on K D a and on hold-up in all column heights studied, 75, 161 and 246 mm. For the same superficial velocity of the dispersed phase, the larger the hold-up was, the shorter the column. For the sieve plate column, the effects of the superficial velocity of the dispersed phase and the number of plates were also studied. Results showed that the K D a and hold-up increased with an increase in both parameters. The selectivity of separation of xylanase and BSA (model contaminant) was very high, since 60% of the enzyme was extracted in the light phase, whereas no significant amount of BSA was extracted. The possibility of using the sieve plate column in continuous operation for enzyme extraction was studied because previous work had only addressed the semicontinuous extraction of enzyme. The residence time distribution of the PEG phase using different superficial velocities of the salt phase was studied in continuous operation. The time required to reach the steady state was 40 min, and 70% of the xylanase was recovered. It was found that the Modified Power Spline software was well adjusted to the experimental results.
A Bayesian approach to stochastic capture zone delineation incorporating tracer arrival times, conductivity measurements, and hydraulic head observations Luc Feyen; Paulo Justiniano Ribeiro Junior Water Resources Research, v. 39, n. 5, p. 1126 2003 DOI Home page Palavra-chave: groundwater; tracer data; Bayesian inference; well capture zone Áreas do conhecimento: Ciências Exatas e da Terra; Probabilidade e Estatística Aplicadas; Estatística Espacial; CIENCIAS_AGRARIAS; Engenharia Agrícola; Fitossanidade; Engenharias; Engenharia Sanitária; Recursos Hídricos; Planejamento Integrado dos Recursos Hídricos resumo ... This paper presents a methodology to invert tracer arrival times and to incorporate travel time data in the delineation of well capture zones. Within a Bayesian framework the observed arrival times a...
A Hybrid Probabilistic/Topological Approach to Topology Error Identification in Power System Real-Time Modeling Elizete Maria Lourenço; Antonio José Alves Simões Costa; Kevin A Clements International Journal of Engineering Intelligent Systems for Electrical Engineering and Communications (1997), v. 11, n. 4, p. 1-7, 2003 Palavra-chave: Hypothesis Testing; Power System Real-Time Monitoring; Topology Error Identification Áreas do conhecimento: Engenharias; Sistemas Elétricos de Potência; Estimação de Estados Em Sistemas Elétricos de Potência; Engenharias; Engenharia Elétrica; Sistemas Elétricos de Potência; Operação Em Tempo Real de Sistemas Elétricos de Potência resumo ...
A methodology for Optimal Power Dispatch Under a Pool-Bilateral Market Thelma Solange Piazza Fernandes; Katia Campos de Almeida IEEE Transactions on Power Systems, v. 18, p. 182-190, 2003 Palavra-chave: Pool-Bilateral; Fluxo de Potência Ótimo; Método dos Pontos Interiores resumo ...
A model for converting solid state fermentation growth profiles between absolute and relative measurement bases. Graciele Viccini; MITCHELL, DAVID ALEXANDER; KRIEGER, NADIA Food Technology and Biotechnology, v. 41, p. 191-201, 2003 Palavra-chave: Fermentação em estado sólido; Rhizopus oligosporus; cinética de crescimento; Modelagem Matemática Áreas do conhecimento: Ciências Biológicas; Microbiologia Aplicada; Microbiologia Industrial e de Fermentação; Engenharias; Engenharia Química; Processos Industriais de Engenharia Química; Processos Bioquímicos resumo ...
A preliminary investigation into thermal spray and other metal-polymer deposition processes and their potential use in the oil industry Gustavo Vicente Maximo Anjos; PAREDES, RAMON S.C.; AMICO, S; Thais Helena Demetrio Syndenstricker Engenharia Térmica, v. 1, p. 03-08, 2003 Palavra-chave: Revestimentos alumínio polimeros; Resistência corrosão Áreas do conhecimento: Engenharias; Engenharia Elétrica; Telecomunicações; Engenharias; Engenharia Mecânica; Processos de Fabricação; Aspersão Térmica resumo ...

Total de registros: 3652