|
|
|
| Registros recuperados: 38 | |
|
|
| Oliveira, Daniel Emanuel Cabral de; Resende, Osvaldo; Costa, Lílian Moreira; Silva, Hellismar Wakson da. |
| This study aimed to determine and evaluate the thermodynamic properties of crambe fruit at different equilibrium moisture contents. The dynamic-gravimetric method was used to collect experimental data. Crambe fruits with an initial moisture content of approximately 26% db (dry basis) were used. The thin-layer desorption of the product was conducted at different controlled temperatures (25, 30, 35, 40, and 45°C) and at water activity levels ranging from 0.10 to 0.89 until the product reached the equilibrium moisture content at the specified air condition. In conclusion, the thermodynamic properties of crambe fruit are affected by temperature and moisture content. The isokinetic theory is valid for the desorption process, which is controlled by enthalpy,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.03.03.00-7 Crambe abyssinica; Enthalpy; Entropy; Gibbs free energy; Enharia de Processamento de Produtos Agrícolas. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32516 |
| |
|
|
| Pereira, Gabriely Pinto; Pontifícia Universidade Católica do Paraná; Carvalho, Ruy Inacio Neiva de; Pontifícia Universidade Católica do Paraná; Biasi, Luiz Antonio; Universidade Federal do Paraná. |
| Este trabalho objetivou avaliar o efeito do teste de envelhecimento acelerado e de condições de armazenamento na qualidade fisiológica de sementes de Hovenia dulcis. O teste de envelhecimento acelerado foi realizado com seis tempos (0, 24, 48, 72, 96 e 120 horas) e quatro repetições. O armazenamento foi estudado num esquema fatorial 2 x 7, sendo um fator a condição de armazenamento (ambiente de laboratório e geladeira) e o outro fator, o tempo de armazenamento (0, 8, 16, 24, 32, 40 e 48 semanas), com quatro repetições. O envelhecimento acelerado foi realizado à temperatura de 45°C e as sementes foram armazenadas ao ambiente e em geladeira, à temperatura de 4 a 7°C e umidade relativa do ar de 40 a 50%, ambos no escuro. As variáveis... |
| Tipo: Pesquisa Básica |
Palavras-chave: 5.01.00.00-9; 5.01.03.00-8 Hovenia dulcis; Entropia; Germinação 5.01.03.03-2 Hovenia dulcis; Entropy; Germination. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4491 |
| |
|
| |
|
| |
|
|
| PONTES,JOSÉ. |
| ABSTRACT We discuss two changes of paradigms that occurred in science along the XXth century: the end of the mechanist determinism, and the end of the apparent incompatibility between biology, where emergence of order is law, and physics, postulating a progressive loss of order in natural systems. We recognize today that three mechanisms play a major role in the building of order: the nonlinear nature of most evolution laws, along with distance to equilibrium, and with the new paradigm, that emerged in the last forty years, as we recognize that networks present collective order properties not found in the individual nodes. We also address the result presented by Blumenfeld (L.A. Blumenfeld, Problems of Biological Physics, Springer, Berlin, 1981) showing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chaos; Dynamical systems; Entropy; Evolution of Science; Pattern formation; Theoretical biology. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000301151 |
| |
|
| |
|
| |
|
|
| Amiri Chayjan,Reza; Esna-Ashari,Mahmood. |
| Sorption isotherm of soya bean (Glycine max (L.) Merr.) was obtained by the dynamic experimental method. Artificial Neural Networks (ANNs) were used for modeling soya bean equilibrium moisture content (EMC). Thermodynamic equations and trained ANN for prediction of two thermodynamic properties of net isosteric heat and entropy of soya bean were utilized. The ANN models were better compared with mathematical models. In this study, the isosteric heat and entropy of sorption of soya bean were separately predicted by two power models as a EMC function. Predictive power of the models was high (R² ≈ 0.99). At the moisture content above 11% (dry basis, db), isosteric heat and entropy of sorption of soya bean were smoothly decreased, while they were... |
| Tipo: Journal article |
Palavras-chave: Back propagation; Entropy; Isosteric heat; Sorption isotherm; Soya bean. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400012 |
| |
|
|
| Zeymer,Juliana Soares; Corrêa,Paulo Cesar; Oliveira,Gabriel Henrique Horta de; Araujo,Marcos Eduardo Viana de; Magalhães,Diana Soares. |
| ABSTRACT Studies about the thermodynamic properties of ryegrass seeds are necessary to improve post-harvest processes, relating the factors that affect product quality with the interaction between water and its chemical components. Given the importance of recognizing and understanding the intrinsic behavior of water in ryegrass seeds and providing data for the improvement of industrial drying equipment, this work aimed to calculate and evaluate the thermodynamic properties of moisture desorption of ryegrass seeds as a function of the equilibrium moisture content. Ryegrass seeds with initial moisture content of 10.4 (% d.b.) was used. The equilibrium moisture content of seeds was determined by static-gravimetric method at different temperatures (10, 20, 30,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gibbs free energy; Entropy; Enthalpy; Water activity; Chung Pfost.. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100202 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Rajoka,Muhammad Ibrahim; Khan,Sana. |
| Production of β-xylosidaseby a cycloheximide and 2-deoxy-D-glucose-resistant mutant of Kluyveromyces marxianus PPY125 was studied when cultured on growth media containing galactose, glucose, xylose, cellobiose, sucrose and lactose as carbon sources. Xylose, cellobiose, lactose and sucrose were the key substrates. Both K. marxianus PPY125 and its mutant (M 125) supported maximum β-xylosidase specific product yield (Y P/X) following growth on xylose. Basal level of activity was observed in non-induced cultures grown on glucose. The mutant produced 1.5 to 2-fold more β-xylosidase than that produced by the wild cells. Synthesis of β-xylosidase was regulated by an induction mechanism in both wild and mutant cells. Addition of... |
| Tipo: Journal article |
Palavras-chave: Enthalpy; Entropy; Enzyme kinetics; Fermentation; Induction; Thermodynamics. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000200007 |
| |
|
| |
|
| |
|
|
| Fernandes,Francely M.; Lapola,David M.; Neregato,Rodrigo; Carvalho,Marcelo H. de; Von Zuben,Claudio J.. |
| Lucilia cuprina (Wiedemann, 1830) is a cosmopolite blowfly species of medical and veterinary importance because it produces myiasis, mainly in ovine. In order to evaluate the demographic characteristics of this species, survivorship curves for 327 adult males and 323 adult females, from generation F1 maintained under experimental conditions, were obtained. Entropy was utilized as the estimator of the survival pattern to quantify the mortality distribution of individuals as a function of age. The entropy values 0.216 (males) and 0.303 (females) were obtained. These results denote that, considering the survivorship interval until the death of the last individual for each sex, the males present a tendency of mortality in more advanced age intervals, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Survivorship curve; Entropy; Lucilia; Calliphoridae. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000300010 |
| |
|
| |
|
| |
|
|
| Preckel, Paul V.. |
| Mathematical measures of entropy as defined by Shannon (1948) and Kullback and Leibler (1951) are currently in vogue in the field of econometrics, primarily due to the comprehensive work by Golan, Judge, and Miller (1996). In this paper, an alternative interpretation of the entropy measure as a penalty function over deviations is presented. Using this interpretation, a number of parallels are drawn with least squares estimators, and it is demonstrated that, with a minor modification of the traditional least squares estimator, both approaches may be applied to the general linear model. The advantages and disadvantages of each approach are discussed, and a philosophical approach to the selection of estimation technique is suggested. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Entropy; Econometrics; Penalty functions; Estimation; Research Methods/ Statistical Methods. |
| Ano: 1998 |
URL: http://purl.umn.edu/28625 |
| |
| Registros recuperados: 38 | |
|
|
|
