Transport Phenomenon
Mostrando 13-24 de 146 artigos, teses e dissertações.
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13. Electrical transport phenomenon in the lead bismuth borate glasses
Ternary system of lead-bismuth-borate glasses has been fabricated in three different compositions (PbO)x% - (Bi2O3)(50-x)% - (B2O3)50% with x = 5, 15 and 25 using the melt quench technique. The D.C. electrical transport mechanism has been discussed both in the low and high field regions. The coefficients of barrier lowering are calculated based on the Schott
Brazilian Journal of Physics. Publicado em: 2009-06
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14. STUDIES ON THE DYNAMICS OF DENSE GRANULAR SYSTEMS / ESTUDOS DA DINÂMICA DE MATERIAIS GRANULARES DENSOS
Granular materials, due to their huge amount of industrial applications (from food industry to astrophysics), have been the object of an increasing number of studies throughout the last couple of decades. Much of the physical description concerning the behaviour of this kind of material, however, still eludes scientists, turning this field of research into a
Publicado em: 2009
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15. The History of Mr Bom Jesus da Cana Verde: conflicts and celebrations around a religious image (Siqueira Campos - PR, 1933) / A história do Senhor Bom Jesus da Cana Verde: conflitos e celebrações em torno de uma imagem religiosa (Siqueira Campos PR, 1933)
This dissertation addressed the conflicts that occurred in the geographical space known as "Northern Pioneer". The image of the Bom Jesus, the family-owned Pinto, was expropriated by the vicar of the parish of the district of Salto Itararé, priest Alfredo Simon, who met about twenty armed men to capture this saint. In this religious conflict that occurred o
Publicado em: 2009
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16. Modelo matemático do processo de purificação do ácido clavulânico por troca iônica em coluna de leito fixo
Clavulanic acid (CA) is a β-lactam antibiotic produced industrially by submerged cultures of the filamentous bacterium Streptomyces clavuligerus. Due to its importance, several studies on the purification of clavulanic acid have been conducted at the Department of Chemical Engineering of the Federal University of São Carlos DEQ-UFSCar. As a natural seq
Publicado em: 2009
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17. Solute mass transport simulation in a porous media with CFDs support (Computer Fluid Dynamics). / Simulação de transporte de massa de um soluto em meio poroso com auxílio do CFD (Computer Fluid Dynamics).
With the advance of the personal computers, complex technical problems, before restricted to the huge centers of international researches, have become more accessible by many areas of the knowledge, like the engineering and in particular the Chemical Engineering. Physical phenomena are represented mathematically by differentials equations, which most of the
Publicado em: 2008
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18. Modelagem matemÃtica e simulaÃÃo computacional do escoamento de petrÃleo parafÃnico em dutos circulares em regime laminar
The Deposition of paraffin is a serious problem in the production and transportation of heavy oil, causing a large increase in the costs of these operations. At the Transporting of paraffinic oil through pipelines subjected to low temperatures environmental, heat will be lost through the walls of the duct and the process of formation and deposition of paraff
Publicado em: 2008
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19. Estudos sobre o duplo direcionamento de proteínas de plantas / Studies on the dual targeting of plant proteins
Compartimentalization of the metabolic processes in organelles, each one having a characteristic protein pool and distinct functions, is a property of eukaryote cells. A highly specific cellular system directs proteins, which are synthesized in the cytosol, to the proper organelles. However, due to functional overlaps between organelles, a given protein may
Publicado em: 2008
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20. Sistema de secagem solar para frutos tropicais e modelagem da secagem de banana em um secador de coluna estática / Solar drying system for tropical fruits and a model for drying bananas in a static column dryer
In this study were projected, built and tested an electric solar dryer consisting of a solar collector, a drying chamber, an exhaust fan and a fan to promote forced hot air convection. Banana drying experiments were also carried out in a static column dryer to model the drying and to obtain parameters that can be used as a first approximation in the modeling
Publicado em: 2008
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21. Conditions of functioning of schools of the field: in search of cost-pupil-quality pointers / Condições de funcionamento de escolas do campo: em busca de indicadores de custo-aluno-qualidade
The study was conducted in 2 (two) schools in the municipality of Bujaru field belonging to the micro-Castanhal mesoregion in the Northeast Paraense. His goal was to identify and analyse the conditions for the functioning of schools of the field, aiming to propose indicators of cost-student-quality for this type of school. The selection of schools is guided
Publicado em: 2008
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22. Development and implantation of an operational setup designed for the evaluation of new tracers for oil reservoir characterization / Desenvolvimento e inplantação de um sistema operacional para a qualificação do desempenho de novos traçadores para reservatórios de petróleo
Petroleum, nowadays, is one of the most important natural resources in the world, since it is one of the main primary sources of energy and also raw material for many different products. It can be found accumulated in the subsoil, and was produced from the remaining portions of animals and vegetables, in a process that took millions of years to be concluded.
Publicado em: 2008
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23. STUDY OF TURBULENT DIFUSION EMPLOYING LAGRANGIAN STOCHASTIC MODELS / ESTUDO DA DIFUSÃO TURBULENTA EMPREGANDO MODELOS ESTOCÁSTICOS LAGRANGEANOS
In this work, the Lagrangian stochastic particle model LAMBDA is utilized to simulate the dispersion and the transport of contaminants under different atmospheric conditions. The analysis employs three different field experiments of atmospheric diffusion: the Copenhagen experiment, which was accomplished in unstable conditions, the Prairie Grass experiment i
Publicado em: 2007
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24. Estudo dos efeitos da infecção por Plasmodium gallinaceum em processos fisiológicos de Aedes aegypti. / Effects on physiological processes in Plasmodium gallinaceum infected Aedes aegypti.
Insect disease vectors show decreased fecundity when infected with Plasmodium. This phenomenon has already been demonstrated in laboratory models such as Aedes aegypti, Anopheles gambiae and Anopheles stephensi . Some physiological processes of Aedes aegypti suffer changes when the vector is infected with Plasmodium gallinaceum . The ecdysone (20-hidroxyecdy
Publicado em: 2007