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Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Color reduction of raw sugar syrup using hydrogen peroxide
Resumo Uma solução comercial de H2O2 (35%, v/v) foi avaliada como agente clarificante em xarope de açúcar tipo VHP (alta polarização), em arranjo experimental de redes neurais artificiais (RNA). Quinze corridas experimentais foram conduzidas e as amostras foram coletadas em intervalos de tempo de 0, 5, 10, 15, 20, 25, 30, 40, 50, 60, 75 e 90 min. Os en
Braz. J. Food Technol.. Publicado em: 20/05/2019
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2. Ensaios de ondas ultrassônicas e redes neurais artificiais na avaliação da resistência à compressão do concreto
Stripping of formworks in reinforced concrete structures can only be done when concrete is hardened enough to carry the loads without generating unacceptable deformations. These are two important demands from Brazilian Code NBR 14931-2004. To get those conditions the structural design engineer should inform the building engineer the minimum values of compres
Publicado em: 2010
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3. Um paradigma orientado a análise de performance de redes de pacotes / A paradigm oriented to performance analysis of packet switched networks
A crescente complexidade das redes de comunicação de dados tem como conseqüência direta tornar cada vez mais complexas as tarefas de projetar seu dimensionamento e evolução. Um passo preliminar vitalmente importante no projeto de uma rede é a coleta de dados relacionados ao uso esperado da rede. Os padrões de tráfego estimados são usados nos cálcu
Publicado em: 2010
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4. EXTRAÇÃO E RECONHECIMENTO DE CARACTERES ÓPTICOS A PARTIR DO CO-PROJETO DE HARDWARE E SOFTWARE SOBRE PLATAFORMA RECONFIGURÁVEL / EXTRACTION AND RECOGNITION OF OPTICAL CHARACTERS BASED ON HARDWARE AND SOFTWARE CO-DESIGN OVER RECONFIGURABLE PLATFORM
Este trabalho apresenta a implementação e análise de um sistema voltado à extração e reconhecimento de caracteres ópticos a partir do co-projeto de hardware e software sobre uma plataforma reconfigurável. Por conta da importância atribuída ao sentido da visão, sistemas artificiais capazes de emular as tarefas envolvidas neste processo biológico t
Publicado em: 2008
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5. "Planejamento de quinonas com atividade tripanossomicida" / Planning of quinone compounds with trypanocidal activity
A set of 25 quinone compounds with anti-trypanocidal activity was studied by using the Density Functional Theory (DFT) method in order to calculate electronic atomic and molecular properties to be correlated with the biological activity. The chemometric methods Principal Component Analysis (PCA), Hierarchical Cluster Analysis (HCA), Stepwise Discriminant Ana
Publicado em: 2007
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6. Use of alkaline sucrose gradients in a zonal rotor to detect integrated and unintegrated avian sarcoma virus-specific DNA in cells.
We have attempted to distinguish integrated and unintegrated forms of avian sarcoma virus-specific DNA in cells by sedimentaton through an alkaline sucrose gradient in a slowly reorienting zonal rotor. Results obtained with this procedure are similar to those obtained by the more convenient analysis of networks of high-molecular-weight cell DNA. Most, if not
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7. A possible evolutionary origin for the Mn4 cluster of the photosynthetic water oxidation complex from natural MnO2 precipitates in the early ocean
The photosynthetic water oxidation complex consists of a cluster of four Mn atoms bridged by O atoms, associated with Ca2+ and Cl−, and incorporated into protein. The structure is similar in higher plants and algae, as well as in cyanobacteria of more ancient lineage, dating back more than 2.5 billion years ago on Earth. It has been proposed that the proto
National Academy of Sciences.
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8. Intermolecular interactions and water structure in a condensed phase B-DNA crystal
By controlled dehydration, the unit cells of dodecamer DNA–drug crystals have been shrunk from 68 000 (normal state) to 60 000 (partially dehydrated intermediate state) to 51 000 Å3 (fully dehydrated state), beyond which no further solvent loss occurs. The total solvent content in the normal crystals is ~40% by volume, reducing to ~20% in the fully dehydr
Oxford University Press.