Residence Time Distribution
Mostrando 13-24 de 98 artigos, teses e dissertações.
-
13. Distribution of prokaryotic organisms in a tropical estuary influenced by sugar cane agriculture in northeast Brazil
In a joint Brazilian-German case study, distribution patterns of microorganisms were compared with environmental variables in the tropical coastal Manguaba lagoon in northeast Brazil, which is situated downstream of several sugar cane processing plants . 16S rDNA and 16S rRNA single strand conformation polymorphism (SSCP) gene fingerprinting were used to fol
Brazilian Journal of Microbiology. Publicado em: 2010-12
-
14. Factorial design to quantify the influence of extrusion parameters in the mean residence time
Residence time distribution (RTD) is a very important parameter in extrusion, either for simple polymer processing or for special processes like compounding, blending, reactive compatibilization, and controlled degradation. This work deals with the values of mean residence time (t n) as a function of the number of 45 degrees kneading elements in the screw pr
Polímeros. Publicado em: 19/11/2010
-
15. Evolución microestructural de un acero inoxidable superdúplex bajo ciclos térmicos de corta duración
This work investigates the effect of thermal cycling on the microstructure of a stainless steel superduplex, specifically on the sigma phase formation. The examined thermal cycles are similar to those produced in the heat affected zone of stainless steel when applying GTAW welding process. The temperatures and residence time for the cycle was determined usin
Soldagem & Inspeção. Publicado em: 2010-09
-
16. Recuperação e purificação de proteínas do soro de queijo tipo coalho usando cromatografia de troca iônica e interação hidrofóbica em leito na forma expandida
Expanded Bed Adsorption plays an important role in the downstream processing mainly for reducing costs as well as steps besides could handling cells homogenates or fermentation broth. In this work Expanded Bed Adsorption was used to recover and purify whey proteins from coalho cheese manufacture using Streamline DEAE and Streamline SP both ionic resins as we
Publicado em: 2010
-
17. Kinetics of barium sulphate reaction crystallization in crystallizers with internal circulation
Kinetic calculation results describing the observed nucleation and growth rates of barium sulphate crystals precipitated in an integrated reaction-crystallization process in a barium sulphate-ammonium chloride-water system are presented and analyzed. The scope of experiments included two continuous model DTM-type crystallizers (Draft Tube Magma) with interna
Brazilian Journal of Chemical Engineering. Publicado em: 2008-06
-
18. Distribuição do tempo de residência em processo de pasteurização com trocador de calor a placas. / Residence time distribution in a pasteurization process with plate heat exchanger.
É apresentado um estudo de distribuição do tempo de residência nas etapas de um processo de pasteurização contínuo por trocador de calor a placas (aquecimento, resfriamento, regeneração e retenção). Para o estudo experimental, foi adotada a técnica condutimétrica usando cloreto de sódio em solução aquosa como traçador. Foram verificadas as i
Publicado em: 2008
-
19. Composição e distribuição (espacial e temporal) de macrófitas aquáticas no reservatório do Lobo (Broa), Itirapina/Brotas, SP / Composition and distribution (spatial and temporal) of aquatic macrophytes in the Lobo reservoir (Broa), Itirapina/Brotas, Brazil
The objective of this study was to examine the composition and distribution of aquatic macrophytes species in the Lobo reservoir (Broa) in four periods of the year 2007: March, May, August and November. To achieve the proposed objectives, limnological variables involving water (pH, conductivity, temperature, dissolved oxygen, chlorophyll, nitrogen and phosph
Publicado em: 2008
-
20. Modelo matemático para avaliação hidrodinâmica em reatores tubulares operando em regime não-permanente / Mathematical model for hydrodynamic evaluation of pipe reactors with diffusion operated in non-steady flow
Mathematical models for hydrodynamic characteristics evaluation of reactors are commonly used however there is a lack of information in the literature concerning the application of mathematical modeling for non-steady state flow. In this thesis, it is presented a non-steady mathematical model to simulate the hydrodynamic behavior of pipe flow reactors with d
Publicado em: 2008
-
21. Estudo da fluidodinâmica e da secagem de um secador rotatório da indústria de fertilizantes
The dimensioning, the modeling and the simulation of the rotary dryers constitutes a big challenge. The drying involves mass and heat transfer, and fluid dynamics processes of the most different forms. Great part of the dryers projects are done according to empiricism and based on the experience of engineers and on the scale-up of prototypes. The purpose of
Publicado em: 2008
-
22. Hospital morbidity due to influenza-related causes of elderly in Brazil, 1992 to 2006: actual situat, trends and impact of vaccination / Morbidade hospitalar por causas relacionadas à Influenza em idosos no Brasil, 1992 a 2006: situação atual, tendências e impacto da vacinação
Objectives. To describe the magnitude, distribution and seasonality of influenzarelated causes of hospitalization in people older than 59 years old, according to the subgroup of age, gender and place of residence in Brazil from 1992 to 2006. Methods. This is an observational, ecological and descriptive study combining the description of time series and multi
Publicado em: 2008
-
23. Avaliação pré-clínica de lipossomas pH-sensíveis de longa circulação contendo cisplatina
cis-Diamminedichloroplatinum (II) or cisplatin (CDDP) is one of the anticancer agents most widely used in the treatment of solid tumors. However, the effectiveness of its clinical use is hampered by the induction of severe side effects and its tendency to provoke chemoresistance. To circumvent these inconveniences, drug delivery systems, such as long-circula
Publicado em: 2008
-
24. Geographic expression of aids in Campinas municipal area/SP : two decades of the Aids epidemic / Expressão geografica da Aids no municipio de Campinas - SP : duas decadas de epidemia Aids
Understanding the different socio-economic, cultural, biological, and political dimensions of the HIV and Aids epidemic is still a large challenge for the Brazilian Health System after more than twenty years of the disease in the country and the world. The current dynamic of the Aids epidemic touches people in different ways in their "habitats", and is chara
Publicado em: 2007