Journal
JOURNAL OF FOOD ENGINEERING
Volume 100, Issue 1, Pages 93-101Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2010.03.032
Keywords
Activation energy; Arrhenius equation; Diffusion coefficient; Fick's second law; Partition coefficient; Weibull model
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Funding
- Food Security USDA [2008-34477-09142]
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The release kinetics of nisin from poly(butylene adipate-co-terephthalate) (PBAT) to distilled water was studied at of 5.6, 22 and 40 degrees C. The release kinetics of nisin from PBAT film was described using Fick's second law of diffusion, partition coefficient, and Weibull model. The diffusion coefficients (D) determined were 0.93, 2.29, and 5.78 x 10(-10) cm(2)/s at 5.6, 22, and 40 degrees C, respectively. The partition coefficients (K) calculated were 0.84, 3.89, and 5.2 x 103 at 5.6, 22, and 40 degrees C, respectively. The nisin release data at selected temperatures were fitted with the Weibull model (R-2 > 0.97) with b and n values ranging from 0.02 to 0.98 and from 0.28 to 0.45, respectively. The temperature dependence of D, K, and Weibull model parameter b was modeled using the Arrhenius equation giving values of activation energy (E-a) of 38.3 kJ mol(-1) (for D), 38.5 kJ mol(-1) (for K), and 79.5 kJ molt (for b). (C) 2010 Elsevier Ltd. All rights reserved.
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