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| Rodrigues,Karen C.; Silva,Hellismar W. da; Silva,Isneider L.; Santos,Samuel G. F. dos; Silva,Daniel P. da; Rodovalho,Renato S.. |
| ABSTRACT Studies related to water sorption in seeds are essential for the design and optimization of storage systems. The objective of this research was to determine and model the adsorption isotherms and calculate the latent heat of water vaporization, differential enthalpy and entropy, the isokinetic theory and Gibbs free energy for ‘Cumari-do-Pará’ pepper seeds. The equilibrium moisture contents were obtained by the static gravimetric method at temperatures of 30, 35 and 40 °C and water activities between 0.290 and 0.900 (decimal). The Chen-Clayton model is the one that best represents the water adsorption isotherms in ‘Cumari-do-Pará’ pepper seeds under the studied conditions, with 9.94% mean relative error, 0.40 mean estimated error and random... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum chinense L.; Hygroscopicity; Latent heat; Isokinetic. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000400280 |
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| Silva,Hellismar W. da; Rodovalho,Renato S.; Velasco,Marya F.; Silva,Camila F.; Vale,Luís S. R.. |
| ABSTRACT The objective of this study was to determine and model the drying kinetics of 'Cabacinha' pepper fruits at different temperatures of the drying air, as well as obtain the thermodynamic properties involved in the drying process of the product. Drying was carried out under controlled conductions of temperature (60, 70, 80, 90 and 100 °C) using three samples of 130 g of fruit, which were weighed periodically until constant mass. The experimental data were adjusted to different mathematical models often used in the representation of fruit drying. Effective diffusion coefficients, calculated from the mathematical model of liquid diffusion, were used to obtain activation energy, enthalpy, entropy and Gibbs free energy. The Midilli model showed the best... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum chinense L.; Moisture ratio; Enthalpy; Activation energy. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200174 |
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