Enthalpy Of Fusion
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Determination of Microstructure, Mechanical, Electrical and Thermal Properties of The Directionally Solidified Al-Si-Co Ternary Alloy
In this work, Al-12.6Si-2Co (wt.%) ternary alloy of near eutectic composition was directionally solidified at a constant temperature gradient (G=7.60 K/mm) in a wide range of growth rates (V=8.35-166.30 µm/s) using by Bridgman type growth apparatus. Flake spacing (λ), microhardness (HV), tensile stress (σ) and electrical resistivity (ρ) were measured fro
Mat. Res.. Publicado em: 26/02/2016
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2. Growth kinetics, effect of carbon substrate in biosynthesis of mcl-PHA by Pseudomonas putida Bet001
Growth associated biosynthesis of medium chain length poly-3-hydroxyalkanoates (mcl-PHA) in Pseudomonas putida Bet001 isolated from palm oil mill effluent was studied. Models with substrate inhibition terms described well the kinetics of its growth. Selected fatty acids (C8:0 to C18:1) and ammonium were used as carbon and nitrogen sources during growth and P
Braz. J. Microbiol.. Publicado em: 2014-06
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3. Solution thermodynamics of methocarbamol in some ethanol + water mixtures
Apparent thermodynamic functions, Gibbs energy, enthalpy and entropy of solution and mixing, for methocarbamol in ethanol + water mixtures, were evaluated from solubility data determined at temperatures from 293.15 K to 313.15 K and from calorimetric values of drug fusion. The drug solubility was greatest in the mixtures with 0.70 or 0.80 mass fraction of et
Quím. Nova. Publicado em: 2012
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4. Rheological and enthalpy performance of pan bread dough with maize resistant starch and transglutaminase. / Desempenho reológico e entálpico da massa de pão com amido resistente de milho e transglutaminase.
The objective of this work was to study the partial substitution of wheat flour (WF) to maize resistant starch (MRS) and the addition of transglutaminase enzyme (TG) on the rheological and enthalpy properties of pan bread dough. The MRS was added as an alternative to increase the fiber ingestion while TG was added to supply the gluten dilution, catalyzing th
Publicado em: 2009
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5. Compatibilizing effect of post-consumer high density polyethylene in blends with polyamide-6 / Efeito compatibilizante do polietileno de alta densidade pos-consumo em blendas com poliamida-6
Polymer blends are commonly immiscible, due to the small entropy of mixture, and incompatible, caused by the absence of intermolecular interactions between the phases, resulting in poor mechanical properties. The addition of block or graft copolymers is an alternative way to improve the adhesion at the interface and to reduce the interfacial tension. In this
Publicado em: 2007
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6. Reciclagem química do jornal para a produção de membranas de acetato de celulose pelo processo de acetilação homogêneo
In the present work, the chemical recycling of waste newspaper it was done through the homogeneous acetylation process applyed to original and purifyed materials. This materials were characterized by FTIR and TGA. To the sythesis, it was used 48 hours of acetylation to original newspaper (AC48) and 24 hours to purifyed newspaper (AC24). Membranes from this a
Publicado em: 2007
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7. Reciclagem quÃmica do jornal para a produÃÃo de membranas de acetato de celulose pelo processo de acetilaÃÃo homogÃneo
In the present work, the chemical recycling of waste newspaper it was done through the homogeneous acetylation process applyed to original and purifyed materials. This materials were characterized by FTIR and TGA. To the sythesis, it was used 48 hours of acetylation to original newspaper (AC48) and 24 hours to purifyed newspaper (AC24). Membranes from this a
Publicado em: 2007
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8. DeterminaÃÃo de um novo valor para a entalpia de fusÃo do cristal perfeito de acetato de celulose
The enthalpy of fusion of a perfect crystal of cellulose acetate was calculated in this thesis. In order to do so, cellulose samples from different sources were acetylated through the heterogenous acetilation methodology. The cellulose acetate samples were characterized by differencial scanning calorimetry (DSC) and by wide angle X-ray diffraction (WAXD). Th
Publicado em: 2006
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9. Determinação de um novo valor para a entalpia de fusão do cristal perfeito de acetato de celulose
A entalpia de fusão de um cristal perfeito de acetato de celulose foi calculada nessa dissertação. Para isso, amostras de celulose de diferentes origens foram acetiladas através do método de acetilação heterogêneo. As amostras de acetato de celulose foram caracterizadas por calorimetria diferencial de varredura (DSC) e difração de raios-X a alto â
Publicado em: 2006
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10. Aplicação da calorimetria diferencial da varredura modulada no estudo de blendas polimericas
Temperature modulation was implemented in the differential scanning calorimetry (DSC) in the 1990 s, allowing separation of thermodynamic and kinetic phenomena. In this case, a mathematical treatment of data is necessary. The purpose of this work is to evaluate the application of modulated DSC on the study of polymeric blends made of poli(vinyl alcohol) and
Publicado em: 2001
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11. Modelo termodinamico para o aquecimento não-linear, a laser, e suas aplicações ao processamento de materiais
The subject of the computer modeling of the laser processing of materials continues to be highly topical in Materials Science. Basic to such an achievement was to have an well posed proposition to determine the time evolution of the temperature anywhere in the laser heated sample. Though models of such a kind abound in the literature, they are either rather
Publicado em: 1994
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12. Termoquimica de quelatos de 2,2,6,6-tetrametil-3,5-heptanodiona com elementos lantanidicos
The chelates [Ln(thd)3, cr] (Ln = La, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm and Yb; thd = 2,2,6,6-tetramethyl-3,5-heptanedionato) were prepared, characterized and thermochemically studied through reaction-solution calorimetry, by using HCl.26,64 H2O (aq) as solvent, based on the following reaction LnCl3.6H2O(cr) + 3 Hthd(l) + 73,92H2O(l) = [Ln(thd)3,cr] + 3HCl.26,6
Publicado em: 1992