1 Column Generation
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. HPLC METHOD IMPROVEMENT FOR 4-NONYLPHENOL DETERMINATION IN ANAEROBIC REACTORS: DECREASING SOLVENT CONSUMPTION AND WASTE GENERATION
The aim of this study was to develop a chromatographic method for 4-NP determination in anaerobic batch reactors using low amount of organic solvents and also evaluate 4-NP degradation in the presence of different co-substrates. Chromatographic parameters was improved for stationary phase (C-8 column), mobile phase (acetonitrile/water solution 90:10, v:v), c
Quím. Nova. Publicado em: 2020-09
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2. Determination of Hg in Biological Samples and Ethanol Fuel by Photochemical Vapor Generation after Pre-Concentration in a Gold Trap
In this work, the photochemical vapor generation (PVG) coupled with atomic absorption spectrometry and a pre-concentration step with an Au column was used for the determination of Hg in biological samples and ethanol fuel. PVG with pre-concentration showed an up to 250-fold higher sensitivity compared to the approach without pre-concentration. The accuracy o
J. Braz. Chem. Soc.. Publicado em: 2017-09
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3. A Multi-Pumping Flow System with Pulsed Fluidization to Evaluate Soil Capacity for Phosphate Adsorption
Soils with high levels of iron and aluminum, thus negatively the phosphorous availability, affecting crop yields. A prior determination of the soil capacity to adsorb phosphate is relevant to attaining good agricultural performance. To this end, a multi-pumping flow system with pulsed fluidization is proposed. The procedure takes into account the amount of r
J. Braz. Chem. Soc.. Publicado em: 2017-07
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4. Cassava processing wastewater as a platform for third generation biodiesel production
ABSTRACT This study aimed to evaluate third generation biodiesel production by microalgae Phormidium autumnale using cassava processing wastewater as a platform. Experiments were performed in a heterotrophic bubble column bioreactor. The study focused on the evaluation of the bioreactor (batch and fed-batch) of different operational modes and the analysis of
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-10
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5. Empacotamento de bicliques em grafos bipartidos / Biclique packing in bipartite graphs
Nesta tese, estudamos o problema de Empacotamento de Bicliques. Um biclique é um grafo bipartido completo. No problema de Empacotamento de Bicliques são dados um inteiro k e um grafo bipartido G e deseja-se encontrar um conjunto de k bicliques, subgrafos de G, dois a dois disjuntos nos vértices, tal que a quantidade total de arestas dos bicliques escolhid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/10/2012
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6. Modelling of acid mine drainage (AMD) in columns
A model is proposed in this paper to describe the generation of acid mine drainage (AMD) in leaching columns. The model considers: (i) Water flow through the column, which is calculated using the 1 - D analytic solution of the Richards' equation assuming the existence of a similarity relationship between the water retention function and the water content pro
Brazilian Journal of Chemical Engineering. Publicado em: 2011-09
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7. Uso de rotas elementares no CVRP / Using elementary routes to solve the CVRP
Esta dissertação aborda o Problema do Caminho Elementar Mínimo com Restrição de Capacidade (ESPPCC Elementary Shortest Path Problem with a Capacity Constraint) e descreve algoritmos para a sua resolução que fazem uso de conceitos tais como Correção de Rótulos, Programação Dinâmica Bidirecional e Relaxação Decrescente do Espaço de Estados. Ess
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2010
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8. Recovery of p-TBC from a butadiene washing stream in a pilot plant
Results obtained in a pilot-scale unit designed for COD removal and p-TBC (p-tert-butylcatechol) recovery from a butadiene washing stream (pH 14, 200,000 mg COD L-1, highly toxic) at a petrochemical industry are presented. By adding H3PO4, phase separation is achieved and p-TBC is successfully recovered (88 g L-1 of washing stream). Information (time for pha
Brazilian Journal of Chemical Engineering. Publicado em: 2009-12
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9. Crop rotation Scheduling - modeling and solution methodolies / Programação de rotação de culturas - modelos e métodos de solução
Over the last decades, various proposals for techniques and processes to increase agricultural sustainability have been put forward. These proposals bring new planning models in which technical and ecological production aspects must be considered, as well as the access of small farmers to the consumer market. In this type of agricultural production planning,
Publicado em: 2009
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10. Relaxação lagrangeana com divisão em clusters aplicada ao problema da diversidade máxima / Lagrangean relaxation with clustering division applied to the maximum diversity problem
O Problema da Diversidade Máxima é um problema de natureza combinatória com o objetivo de selecionar os m itens mais distintos de um conjunto N = {e$ _1$ , e$ _2$ , ..., e$ _n$ }, com emph{n} elementos, tal que emph{m < n} e existe uma medida de diversidade para cada par de elementos. A literatura apresenta a formulação quadrática do problema e sua
Publicado em: 2009
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11. Relaxação lagrangeana com divisão em clusters aplicada ao problema da diversidade máxima / Lagrangean relaxation with clustering division applied to the maximum diversity problem
O Problema da Diversidade Máxima é um problema de natureza combinatória com o objetivo de selecionar os m itens mais distintos de um conjunto N = {e$ _1$ , e$ _2$ , ..., e$ _n$ }, com emph{n} elementos, tal que emph{m < n} e existe uma medida de diversidade para cada par de elementos. A literatura apresenta a formulação quadrática do problema e sua
Publicado em: 2009
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12. DEVELOPMENT AND VALIDATION OF METHODOLOGY FOR THE EVALUATION OF RUPATADINE BY LIQUID CHROMATOGRAPHY AND CAPILLARY ELECTROPHORESIS / DESENVOLVIMENTO E VALIDAÇÃO DE METODOLOGIA PARA AVALIAÇÃO DE RUPATADINA POR CROMATOGRAFIA LÍQUIDA E ELETROFORESE CAPILAR
Rupatadine is a second generation antihistamine H1, from the pyperidinic group, which inhibits both the histamine and platelet activating factor effects, and is clinically used for the treatment of allergic rhinitis and chronic urticaria. The methods for the evaluation of rupatadine in pharmaceutical products were developed and validated in the present work.
Publicado em: 2009