Effects of heat treatment and storage temperature on the use of açaí drink by nutraceutical and beverage industries

  • Albarici T
  • Pessoa J
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Abstract

This study assesses the storage temperature effect on the anthocyanins of pasteurized and unpasteurized açaí pulp. The data was obtained using a pasteurized and lyophilized pulp (PLP) to evaluate the temperature effect (0, 25, and 40 °C). Part of non-pasteurized frozen pulp (NPP) was pasteurized (NPP-P) at 90 °C for 30 seconds; both pulps were stored at 40 °C. The anthocyanin content reduction in the drink was evaluated from the half-life time (t1/2), activation energy (Ea), temperature quotient (Q10), and the reaction rate constant (k). The t1/2 of the PLP anthocyanins stored at 40 °C was 1.8 times less than that stored at 25 °C and 15 times less than that stored at 0 °C; therefore, the higher temperatures decreased the stability of anthocyanins. The pasteurization increased the t1/2 by 6.6 times (10.14 hours for NPP and 67.28 hours for NPP-P). The anthocyanin degradation on NPP-P followed a first order kinetic, while NPP followed a second order kinetic; thus it can be said that the pasteurization process can improve the preservation of anthocyanins in the pulp.Este trabalho avaliou o efeito da temperatura de armazenamento nas antocianinas de polpas de açaí pasteurizadas e não pasteurizadas. Para avaliar o efeito da temperatura (0, 25 e 40 °C), os dados foram obtidos usando a polpa pasteurizada e liofilizada (PLP). Uma parte da polpa não pasteurizada e congelada (NPP) foi pasteurizada (NPP-P) a 90 °C por 30 segundos e ambas foram armazenadas a 40 °C. A redução das antocianinas totais na bebida foi avaliada pelo tempo de meia-vida (t1/2), energia de ativação (Ea), quociente de temperatura (Q10) e constante de velocidade da reação (k). O t1/2 das antocianinas da PLP armazenada a 40 °C é 1,8 vezes menor que da armazenada 25 °C e 15 vezes menor que a 0 °C, portanto quanto maior a temperatura menor a estabilidade das antocianinas. A pasteurização aumentou t1/2 6,6 vezes (10.14 horas para NPP e 67.28 horas para NPP-P).A degradação das antocianinas na NPP-P seguiu uma cinética de primeira ordem, enquanto NPP seguiu a cinética de segunda ordem, portanto o processo de pasteurização pode aumentar a preservação das antocianinas.

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APA

Albarici, T. R., & Pessoa, J. D. C. (2012). Effects of heat treatment and storage temperature on the use of açaí drink by nutraceutical and beverage industries. Food Science and Technology, 32(1), 9–14. https://doi.org/10.1590/s0101-20612012005000026

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