System Under N K
Mostrando 13-24 de 172 artigos, teses e dissertações.
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13. Tratamento de Ãgua residuÃria de fecularia em reator anaerÃbio com leito fixo de pedras de calcÃrio dolomÃtico / Starch wastewater treatment in anaerobic reactor containing Dolomitic limestone
The cassava processing for starch or flour production generates some wastewater (manipueira) with high organic load and toxic compounds, which cause environmental degradation. In the western Paranà region, there are several starch factories, so its waste generation is a concern for the correct treatment and disposal. Thus, anaerobic reactors are a cost-effe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/02/2012
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14. Mathematical modeling of a three-phase trickle bed reactor
The transient behavior in a three-phase trickle bed reactor system (N2/H2O-KCl/activated carbon, 298 K, 1.01 bar) was evaluated using a dynamic tracer method. The system operated with liquid and gas phases flowing downward with constant gas flow Q G = 2.50 x 10-6 m³ s-1 and the liquid phase flow (Q L) varying in the range from 4.25x10-6 m³ s-1 to 0.50x10-6
Braz. J. Chem. Eng.. Publicado em: 2012-09
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15. Produção do lipopeptídeo surfactina a partir de uma cepa de Bacillus subtilis com o operon srfA sob controle do promotor regulado Pgrac / Production of lipopeptide surfactin from a Bacillus subtilis strain with srfA operon under the control of the Pgrac promoter
The cyclic lipoheptapeptide surfactin is produced by different Bacillus subtilis strains. At a concentration of 20µM, this biosusrfactant is able to reduce the surface tension of water from 72 mN/m to 27 mN/m. This makes surfactin one the most powerful biosurfactants known so far. The surfactin synthetase is a large multienzyme complex consisting of three e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2010
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16. HYBRID SYSTEM USING GAS TURBINE AND FUEL CELL FOR AERONAUTICAL APU APPLICATION
Much effort and resources are being directed to reduce emissions in the most varied sectors. Today, aviation accounts for less than 5% of human related CO2 emissions, but projections for 2050 indicate that the growth of aviation emissions risks undermining the mitigation progress achieved in other sectors. In aeronautics, increasing fuel efficiency is consid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200904
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17. Successful scale-up of human embryonic stem cell production in a stirred microcarrier culture system
Future clinical applications of human embryonic stem (hES) cells will require high-yield culture protocols. Currently, hES cells are mainly cultured in static tissue plates, which offer a limited surface and require repeated sub-culturing. Here we describe a stirred system with commercial dextran-based microcarriers coated with denatured collagen to scale-up
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-06
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18. Experimental study of a rotating packed bed distillation column
The purpose of this work was to study the mass transfer performance of rotating packed beds applying the "Higee" process. The operations were carried out with the n-hexane/n-heptane distilling system at atmospheric pressure and under total reflux conditions. The rotating speed could be varied between 300 and 2500 rpm, which provided centrifugal forces from 5
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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19. Plantar pressure distribution patterns during gait in diabetic neuropathy patients with a history of foot ulcers
OBJECTIVE: To investigate and compare the influence of a previous history of foot ulcers on plantar pressure variables during gait of patients with diabetic neuropathy. INTRODUCTION: Foot ulcers may be an indicator of worsening diabetic neuropathy. However, the behavior of plantar pressure patterns over time and during the progression of neuropathy, especial
Clinics. Publicado em: 2009-02
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20. Spatial variability of phoma spot and nutritional aspects of coffee plants and incidence of brown eye spot in coffee quality. / Variabilidade espacial da mancha de phoma relacionada à nutriÃÃo do cafeeiro e incidÃncia da cercosporiose na qualidade do cafÃ.
The present work aimed to apply geostatistic to evaluate the spatial and temporal variability of coffee phoma spot intensity and nutrition under conventional and organic cropping systems, verify the relationship between the nitrogen/potassium (N/K) ration and the phoma spot intensity and coffee seedlings nutritional aspects, grown under nutrient solution, ev
Publicado em: 2009
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21. Produção de crisântemos de corte sob diferentes relações N:K e aplicação de fungicida via solução nutritiva / Production of cut chrysanthemums under different N:K ratios and fungicide application through nutritive solution
O objetivo deste trabalho foi avaliar a produtividade, intensidade de ferrugem branca (Puccinia horiana) e longevidade pós-colheita de crisântemos, para corte de flor, cultivados em sistema hidropônico, sob diferentes relações N:K e fungicida aplicado via solução nutritiva. Os experimentos foram conduzidos em casa de vegetação, no período de 16/08
Publicado em: 2009
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22. Analise da probabilidade de outage em canais de desvanecimento generalizados para combinadores sob interferencia co-canal / Outage probability analysis in generalized channels of combiners under cochannel interference
Diversity combining is an important technique usually employed to alleviate the unwanted efects of the cochannel interference. Equal-gain and maximal-ratio combining are considered here, as they are two of the most important space diversity methods. Unfortunately, the evaluation of the multifold nested integrals required in the exact outage probability analy
Publicado em: 2009
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23. REQUERIMENTOS NUTRICIONAIS DE MUDAS DE FAVELA, PEQUI, MAROLO E BARBATIMÃO / The nutritional requirements of seedlings of Favela, Pequi, Marolo and BarbatimÃo
The establishment of fruit and medicinal species of native cerrado may soften the negative environmental aspect arising from deforestation, and improve their utilization which today is restricted to local populations. However, depends on a better understanding of the nutritional requirements of these species. Aiming to assess the nutritional aspects and effe
Publicado em: 2009
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24. Coffee leaf analysis using DRIS from irrigated and non-irrigated plantations in the alto Paranaíba region / Diagnose foliar em cafeeiro de sequeiro e irrigado na região do alto Paranaíba com o uso do DRIS
Cerrado soils have low fertility and under-dosing of fertilizers leads to nutritional imbalance on coffee plantations. This study aimed to: comparatively characterize the main deficiencies, nutritional imbalances and excesses in the aerial part of coffee plant; indicate nutrients which respond well to fertilization and their synergistic and antagonistic inte
Publicado em: 2009