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Kinetics of flavour and aroma changes in thermally processed cupuaçu (Theobroma grandiflorum) pulp
Filipa M Silva1, Charles Sims2, Murat O Balaban2
1Escola Superior de Biotecnologia-UCP, Rua Dr. António Bernardino de Almeida, P-4200-072 Porto, Portugal.
Abstract:
Changes in 'fresh' and 'cooked-notes' during thermal treatment of cupuaçu (Theobroma grandiflorum) pulp were evaluated and modelled. Isothermal experiments in the temperature range of 70-98 °C were carried out and a non-linear regression was performed to all data to estimate kinetic parameters. 'Fresh' and 'cooked-notes' change followed simple first-order (Ea = 78-82 kJ·mol-1 , z = 30-31 °C) and reversible first order (Ea = 80-85 kJ·mol-1 ) kinetics, respectively. Although 'cooked-notes' were linearly correlated with 'fresh-notes' (R2 = 0.99), the former was a better indicator for quality degradation. These results are useful to design pasteurisation processes while minimising sensory changes. © 2000 Society of Chemical Industry.
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