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Copyright of GeSec: Revista de Gestao e Secretariado is the property of Sindicato das Secretarias e Secretarios do Estado de Sao Paulo (SINSESP) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Ciência Agronômica is the property of Revista Ciencia Agronomica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Brazil is the second largest producer of pineapple in the world. Pulp is the part of the fruit that is normally consumed, whereas the stalk and the bark are considered waste of it's processing, not being properly utilized by the industries. The objective of this work was to dehydrate the pineapple peel in the form of slices with a length of 15 cm and a width of 8 cm in an oven with forced air circulation at temperatures of 75 and 85 °C and adjust the mathematical models of Henderson and Pabis, Page, Thompson, Diffusion Approximation, Midilli and Two Terms to the experimental data. The coefficient of determination, the mean square deviation and the random distribution of the residuals were used as the criterion for evaluating the adjustment of the mathematical models. The pineapple bark with initial water content of 87.73% b.u had a final water content of 10.67% b.u at 75 °C and 9.05% at 85 °C, with an average reduction of 88, 76% of the initial water content of the study material. It was found that samples submitted to dewatering at 75 °C required a longer time to reach the equilibrium water content compared to dehydrated samples at a temperature of 85 °C. Among the models studied, the Page of diffusion approximation and Midilli presented the highest coefficients of determination (R²> 0.998) and the smallest mean squared deviations (DQM <0.02), however, the Page model was The only one with random distribution of the residues at all temperatures studied, resulting in the best fit to the experimental data of pineapple bark drying. [ABSTRACT FROM AUTHOR]

The carambola (star fruit) (Averrhoa carambola L.) is considered one of the great potential of fruit, being source of compounds essential for the nutrition of humans. A large part of post-harvest fruit losses due to the unpreparedness of the people's branch of the agro-industry and consumers. Drying is the most widely used commercial process to preserve and extend the life of the food product by converting them into more stable products. Thus, the aim was to get carambola (star fruit) drying curves in a convective dryer and from these curves, get drying rate data. The cannons were washed, sanitized, minimally processed into 1 cm thick slices and placed immediately in the trays for drying. We used a convection dryer for the experiment at temperatures of 60, 70 and 80 °C, and drying air velocity of 1.5 m s-1. The weighings were carried out until the mass variations were insignificant, and then the samples were placed in a greenhouse at a temperature of 105 °C for 24 h to determine dry matter. For mathematical adjustment of waste drying curves were used the equations of Henderson, Lewis and Page set with the help of the software Statistica, version 5.0. The best fit was given to the Page model, followed by Lewis and Henderson, presenting the best R2. [ABSTRACT FROM AUTHOR]