Drying is one of the unitary processes most used in the food
industry but is still a complex and little-understood operation, especially
regarding the selection and control of the process conditions to maintain end
product quality. The drying curves for the dried banana slices were obtained
using three different drying temperatures. Drying times of 51, 36, and 30 hours
were required at temperatures of 50°C, 60 °C, and 70 °C, respectively, to
achieve a moisture content of 23.5%. During the drying process, the water
activity in the fruits was measured using the AQUALAB apparatus with direct
reading. The exponential model was fitted to the experimental data using
non-linear regression analysis. The coefficient of determination of the model
was R 0.99. Water activity was determined throughout the drying process for the
three treatments. The relationship between water activity moisture content and
banana sorption isotherms content was studied. The data indicated that water
activity decreased with drying time and increased with moisture content at all
three temperatures. The sigmoid model was fitted to the experimental data by
non-linear regression and the result of the fit was satisfactory (R2´0,995).
The banana moisture content varied in function of the water activity and can be
described by a four-parameter sigmoid polynomial model.
Author(s) Details
Milton Cano-Chauca
Instituto de Ciências Agrárias, Universidade Federal de
Minas Gerais, 39.404-547, Montes Claros, MG, Brazil.
William James
Nogueira Lima
Instituto de Ciências Agrárias, Universidade Federal de
Minas Gerais, 39.404-547, Montes Claros, MG, Brazil.
Daniela Silva
Rodrigues
Instituto de Ciências Agrárias, Universidade Federal de
Minas Gerais, 39.404-547, Montes Claros, MG, Brazil.
Esmirna Micaele
Cardoso Neves
Instituto de Ciências Agrárias, Universidade Federal de
Minas Gerais, 39.404-547, Montes Claros, MG, Brazil.
Luisa Maria
Figuereido Lima
Instituto de Ciências Agrárias, Universidade Federal de
Minas Gerais, 39.404-547, Montes Claros, MG, Brazil.
Claudia Regina Vieira
Instituto de Ciências Agrárias, Universidade Federal de
Minas Gerais, 39.404-547, Montes Claros, MG, Brazil.
Please see the link:- https://doi.org/10.9734/bpi/strufp/v11/1931
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