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Type: Artigo de periódico
Title: The Determination Of Dehydrated Apple Shelf-life Using Accelerated Assays [determinação Da Vida-de-prateleira De Maçã-passa Por Testes Acelerados]
Author: De Moura S.C.S.R.
Berbari S.A.
Germer S.P.M.
De Almeida M.E.M.
Fefim D.D.A.
Abstract: To preview a food shelf-life is essential to evaluate the kinetics of degradation reactions beyond the orientation of the more appropriate conservation conditions of the products. For the dehydrated apple shelf-life estimative, the product was packed in PE film of 140 and stored at 5°C (control), 25°C (room) and 35°C (accelerated) temperatures and then evaluated based on objective color readings of L, a and b Hunter during 6 months at a 15-day interval. Experimental data showed that the color degradation follows the model of a zero order kinetic reaction. The Arrhenius model was applied to reaction rates (k) at each temperature and an activation energy (Ea) of 7.6 kcal.mol-1 and Q10 of = 2.0 was obtained. Shelf-life evaluation was based on subjective (Difference from Control Sensorial Discriminative Test) measurements over 4 months at 15 day intervals. The results suggest that the product stored at 35°C has 100 days shelf-life time. Since Q10 = 2.0, the product stored at room temperature might be 200 days shelf-life time.
Rights: aberto
Identifier DOI: 
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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