Evaporator
Mostrando 1-12 de 62 artigos, teses e dissertações.
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1. Evaluation of Antifungal Potential of Leaf Extract of Chenopodium murale Against Fusarium oxysporum f. sp. lycopersici
RESUMO: O presente estudo foi realizado para avaliar a atividade antifúngica e a análise por CG-EM do extrato de folhas de Chenopodium murale contra Fusarium oxysporum f. sp. lycopersici (FOL), um patógeno de tomate altamente problemático no solo. Folhas secas de C. murale foram extraídas com metanol por duas semanas e, após a evaporação do solvente
Planta daninha. Publicado em: 02/12/2019
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2. RECUPERAÇÃO DE SESQUITERPENOS DO ÓLEO-RESINA DE COPAÍBA A PARTIR DA DESTILAÇÃO MOLECULAR
Copaiba oil-resin has aromatic characteristics and pharmacological activities attributed to sesquiterpenes compounds. These purified compounds present application in perfume, pharmaceutical and cosmetic industries. Therefore, the objective of this work was to use molecular distillation to recover and purify sesquiterpenes of the copaiba oil-resin with purity
Quím. Nova. Publicado em: 2016-08
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3. Alcohol extract of Schinu sterebinthifolius raddi (anacardiaceae) as a local antimicrobial agent in severe autogenously fecal peritonitis in rats
PURPOSE: To develop an alcoholic extract of the inner bark of the Schinus terebinthifolius raddi and to test its impact on autogenously fecal peritonitis in Wistar rats. METHODS: The inner bark of the Schinus terebinthifolius raddi was kept for seven days in 70% ethanol alcohol. The total elimination of the solvent was performed in a rotary evaporator under
Acta Cir. Bras.. Publicado em: 2014
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4. Heat transfer analyses using computational fluid dynamics in the air blast freezing of guava pulp in large containers
Heat transfer during the freezing of guava pulp conditioned in large containers such as in stacked boxes (34 L) and buckets (20 L) and unstacked drums (200 L) is discussed. The air velocities across the cross-section of the tunnel were measured, and the values in the outlet of the evaporator were used as the initial conditions in computational fluid dynamics
Braz. J. Chem. Eng.. Publicado em: 2013-12
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5. Controle preditivo baseado em modelo neuro-fuzzy de sistemas não-lineares aplicado em sistema de refrigeração = : Model predictive control based on neuro-fuzzy nonlinear systems applied to a refrigeration plant / Model predictive control based on neuro-fuzzy nonlinear systems applied to a refrigeration plant
Refrigeration systems can be found in many different branches of industry and are characterized as great energy consumers with considerable non-linear behavior. Several studies have been developed to promote the reduction of energy costs and to minimize the effects of nonlinearities in these systems. The use of automation and process control, particularly th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/07/2012
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6. APPLICATION OF NANOFLUIDS IN SECONDARY REFRIGERATION SYSTEMS / APLICAÇÃO DE NANOFLUIDOS EM SISTEMAS SECUNDÁRIOS DE REFRIGERAÇÃO
The application of nanofluids as secondary fluids in vapor compression refrigeration systems is studied with the development of a lumped-parameter thermodynamic model. When a nanofluid is used as a heat transfer fluid, its thermal conductivity and viscosity increase, when compared with the corresponding properties of the base fluid. The irreversibilities due
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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7. Concentrador solar para dessalinização de água : projeto e construção
A energia é a força motriz das transformações da natureza. O instinto humano é programado para buscar fontes energéticas visando sua sobrevivência e seu conforto, porém o uso indiscriminado e ambicioso dessa energia desarmoniza o equilíbrio natural promovendo um meio ambiente cada vez mais inóspito e uma saturação de recursos naturais comprometen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2011
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8. Microstructure development on sintered Ti/HA biocomposites produced by powder metallurgy
Titanium-based composites with in-situ calcium and phosphor phases were prepared by powder metallurgy processing with titanium and hydroxyapatite (HA) powders. The mixtures were performed in a friction mill with alcohol for 5 hours, dried in a rotating evaporator, pressed at 600 MPa and sintered at 1200 ºC for 2 hours in argon atmosphere. Crystal phases of
Materials Research. Publicado em: 05/08/2011
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9. Application of adaptive control in a refrigeration system to improve performance
This paper reports an experimental investigation using adaptive control in a refrigeration system. This system is composed basically of a semi-hermetic compressor, concentric tubes heat exchangers, the condenser and evaporator, and thermostatic expansion valve (TXV). The refrigerant used in the refrigeration system was the HCFC-22 and also an AC frequency in
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-06
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10. Estudo de simulação computacional de um condensador e um evaporador de gás R-22 em um sistema de geração de água gelada / Study of a computacional simulation of a condenser and a evaporator of r-22 gas in a water chiller
Uma indústria petroquímica situada em Triunfo – RS utiliza, dentro de seus processos, água gelada para trocar calor com outros fluidos e controlar processos exotérmicos. O suprimento desta água em uma baixa temperatura é realizada por três conjuntos de unidades refrigeradoras, cada uma contando basicamente com um compressor, um condensador casco e t
Publicado em: 2011
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11. Síntese e caracterização de pós de fosfato tricálcio-β e de hidroxiapatita: elaboração de bifásicos HA/TCP-β para aplicações como substituto ósseo / Synthesis and characterization of powders of β -Tricalcium phosphate and hydroxyapatite: elaboration of HA/β -TCP biphasic for applications as bone substitute
The treatments of bone loss are current topics of research. The materials that stand out in the treatments of reconstruction and formation of new bone tissue, are the hydroxyapatite, the α and/or β calcium phosphates, and biphasic hydroxyapatite / α and/or β calcium phosphate. It is known from literature that these biomaterials h
Publicado em: 2011
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12. Determinação experimental e modelagem de temperatura de ebulição e pH de sistemas binarios contendo compostos presentes em sucos de frutas / Experimental determination and modeling of boiling pont pH of binary systems containing fruit juice compunds
The vapor-liquid equilibrium of binary aqueous solutions of D-glucose and D-fructose, present in fruit juices, was evaluated by experimental boiling point measurements in a rotary evaporator with total reflux of the vapor phase from 20 kPa to atmospheric pressure (93.6 kPa) and concentration from 10 to 60 % by mass. The experimental data were correlated with
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/04/2010