Thermodynamics
Mostrando 13-24 de 511 artigos, teses e dissertações.
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13. László Tisza, 110 anos: Origens da Física Térmica Moderna
Resumo A axiomática de László Tisza da termodinâmica é revisitada, identificada a partir de cinco elementos constitutivos, e incluída em uma perspectiva histórica. Através de uma definição de medida, uma análise detalhada da associação do formalismo de Tisza com o experimento é conduzida. A ênfase da apresentação é para a relação da axiom
Rev. Bras. Ensino Fís.. Publicado em: 10/01/2019
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14. Controlling sintering and grain growth of nanoceramics
Resumo Sinterização e crescimento de grão são processos fundamentais que afetam a evolução microestrutural das cerâmicas. Os modelos fenomenológicos que descrevem esses processos, conforme encontrados nos livros didáticos, são simplificações do conjunto altamente dinâmico de parâmetros do sistema, o que leva à previsibilidade limitada e à nec
Cerâmica. Publicado em: 2019-01
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15. Kinetics and Thermodynamics of Thermal Inactivation of β-Galactosidase from Aspergillus oryzae
ABSTRACT For optimization of biochemical processes in food and pharmaceutical industries, the evaluation of enzyme inactivation kinetic models is necessary to allow their adequate use. Kinetic studies of thermal inactivation of β-galactosidase from Aspergillus oryzae were conducted in order to critically evaluate mathematical equations presented in the lite
Braz. arch. biol. technol.. Publicado em: 13/09/2018
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16. Gibbs' rational reconstruction of thermodynamics according to the heuristic tradition of Descartes' analytical method
Abstract Many rational aspects of some fields of physics, including those related to the process of discovery, may be better understood using methodological tools typical of the philosophical analysis of science. Throughout this paper we shall use the heuristic tradition of Descartes' analytical (or discovery) method for a rational reconstruction of Gibbs' t
Rev. Bras. Ensino Fís.. Publicado em: 30/07/2018
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17. Microstructural, thermochemistry and mechanical evaluation of self-reducing pellets using electric arc furnace (EAF) dust containing zinc for Waelz process
ABSTRACT The increment of recycling of steel using electric arc furnace and the tendency to coat of steel products with zinc, in order to prevent corrosion, has increased the proportion of galvanized scrap used worldwide in the recent years. Approximately 10 to 20 Kg/t of cast steel is generated in casting arcs. These collected dusts electric arc furnace (EA
Matéria (Rio J.). Publicado em: 19/07/2018
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18. Characterization of mineral wools obtained from ornamental rock wastes
Abstract The study aimed to characterize the mineral wools obtained from wastes of the cutting step of marble and granite, in order to evaluate the possibility of their use on an industrial scale. Mixtures of marble and/or granite wastes were prepared in order to reach the chemical composition of rock and glass wools. The batches were melted in an electric a
REM, Int. Eng. J.. Publicado em: 2018-07
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19. SOLVENT SELECTION FOR CHEMICAL REACTIONS: AUTOMATED COMPUTATIONAL SCREENING OF SOLVENTS USING THE SMD MODEL
Finding the most efficient solvent for a chemical reaction can demand costly experimental procedure and the screening is usually limited to few solvents. The use of theoretical methods could accelerate the search for the best solvent, able to promote most effective kinetics and thermodynamics of a reaction. In this work, it was proposed an automated procedur
Quím. Nova. Publicado em: 2018-06
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20. Assessment of viscosity calculation for calcium-silicate based slags using computational thermodynamics
Abstract This study focuses on the viscosity calculation of molten slags using computational thermodynamics. Different slag systems and their measured viscosities from different references were used and compared with those obtained through FactSage software. To calculate the viscosity of each slag the Viscosity module available in FactSage 6.4 was used. In o
REM, Int. Eng. J.. Publicado em: 2018-04
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21. Evaluating the hot metal dephosphorization efficiency of different synthetic slags using phosphorus partition ratio, phosphate capacity and computational thermodynamics
Abstract Phosphate capability (CP) and phosphorus partition ratio (LP) are usually used to evaluate the thermodynamic efficiency of dephosphorization slags with different compositions in hot metal pretreatment. However, these parameters are only useful in equilibrium conditions, and they are not accurate when they are used to evaluate slag efficiency in indu
REM, Int. Eng. J.. Publicado em: 2018-04
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22. Advances in enzyme bioelectrochemistry
ABSTRACT Bioelectrochemistry can be defined as a branch of Chemical Science concerned with electron-proton transfer and transport involving biomolecules, as well as electrode reactions of redox enzymes. The bioelectrochemical reactions and system have direct impact in biotechnological development, in medical devices designing, in the behavior of DNA-protein
An. Acad. Bras. Ciênc.. Publicado em: 2018
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23. Effect of Ferrite on the Precipitation of σ Phase in Cast Austenitic Stainless Steel Used for Primary Coolant Pipes of Nuclear Power Plants
The effect of ferrite phase on the precipitation of σ phase in a Z3CN20.09M cast austenitic stainless steel (CASS) used for primary coolant pipes of pressurized water reactor (PWR) nuclear power plants was investigated by using isothermal heat-treatment, optical microscopy (OM), transmission electron microscopy (TEM) and electron probe microanalysis (EPMA)
Mat. Res.. Publicado em: 28/09/2017
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24. AVANÇOS RECENTES NA HIDROAMINAÇÃO DE COMPOSTOS INSATURADOS
This review presents thermodynamics and kinetics aspects of the hydroamination reaction, recent advancements on this field for non-activated alkenes, alkynes and allenes, employing transition metal catalysis or organocatalysis, including activation by hydrogen bonding or Brønsted acids. Selected syntheses that contain a strategic hydroamination step will be
Quím. Nova. Publicado em: 2017-09