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Mostrando ítems 31-40 de 168
Elaboração de curvas residuais com o auxílio de diferenças finitas. Um estudo comparativo
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA QUÍMICAPrograma de Pós-Graduação em Engenharia QuímicaUFMG, 2021-02-25)
In this thesis a new methodology for the elaboration of residual curve maps using the
finite difference method using the explicit Euler method is described. To create residual
curve maps, the resolution of a system of ...
Acetic acid and pentane treatment by a biofiltration system based on organic beds under transient conditions
(2019)
Assessment of biofiltration systems under transient conditions is necessary when determining industrial
operating conditions of biofiltration beds. The key system variables such as filter bed moisture content, the
pollutant ...
Determination of aldehydes in fish by high-performance liquid chromatography
(2001)
A new analytical method to determine trace volatile aldehydes isolated from the headspace of fish meat at room temperature by high-performance liquid chromatography (HPLC) in the form of 2,4- dinitrophenylhydrazone (DNPHo) ...
Statistical thermodynamics models for polyatomic adsorbates: Application to adsorption of n-paraffins in 5A zeolite
(American Chemical Society, 2005-03)
Experimental adsorption isotherms of five n-paraffins (ethane, propane, butane, pentane, and hexane) in 5A zeolite were described by means of a statistical thermodynamics model for linear adsorbates (MLA) developed by ...
Interacción física entre n-alcanos
(Universidad Nacional de Colombia, 1985)
Molecular properties of n-alkanes such as polarizability, number of dispersion electrons and infernal heat of vaporization are estlmated and expressed as functions of the number of groups that form the molecule. Since the ...
Alcalóides de Rutaceae: química e atividade biológica.
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Química - PPGQ, 2003-11-18)
This
work describes the phytochemical study of two plant species Galipea bracteata and
Ravenia infelix belonging to the family Rutaceae, aiming the isolation and structure
determination of componds from leaves and branches ...
Thermoplastic blend demixing by a high-pressure, high-temperature process
(John Wiley & Sons Inc, 2005-09-14)
The analysis of a thermoplastic polymer blend requires a precise separation of the blend components, which is usually performed by selective solvent extraction. However, when the components are high-molecular-weight polymers, ...
Chemical profile of rums as a function of their origin. The use of chemometric techniques for their identification
(AMER CHEMICAL SOC, 2008)
To identify chemical descriptors to distinguish Cuban from non-Cuban rums, analyses of 44 samples of rum from 15 different countries are described. To provide the chemical descriptors, analyses of the the mineral fraction, ...
Seasonal variation in the odour characteristics of whole milk powder
(2006-09-28)
Seasonal changes in whole milk powder odour characteristics were monitored using SPME-GC and E-nose methodologies. ANOVA
showed a significant effect of the season on dimethyl sulphide, n-pentanal, n-hexanal, and butyric ...