Abstract

BROUSSE, Maria M et al. Kinetics of water absorption of cassava tissues macerated with a microbial Polygalacturonase. Rev. cienc. tecnol. [online]. 2014, n.22, pp.53-57. ISSN 1851-7587.

The objective of the present work was to determine the predictive ability of Pilosof and exponential models to describe water absorption kinetics of cassava tissues macerated with the enzymatic extract of Wickerhamomycesanomalus. Cassava tissues were macerated in Erlenmeyers flasks at 45 oC, on a rotator shaker (190 rpm), during 1,2 and 4 h, with different extract enzymatic dilutions. Macerated cassava tissues were filtered and dried. A good fit of the experimental data to water absorption models evaluated was obtained. The highest value of C∞ (water concentration at equilibrium) was reached at 1 h of maceration, using undiluted enzymatic extract, with a lower cell damage respect to longer treatments. At higher enzymatic treatment times, water absorption rate constant (K) increased, but C∞ decreased.

Keywords : Polygalacturonase; Maceration; Cassava; Water absorption; Kinetic.

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