- Title
- The inactivation kinetics of polyphenol oxidase in mushroom (Agaricus bisporus) during thermal and thermosonic treatments
- Creator
- Cheng, X.; Zhang, Min; Adhikari, Benu
- Date
- 2013
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/36691
- Identifier
- vital:4836
- Identifier
-
https://doi.org/10.1016/j.ultsonch.2012.09.012
- Identifier
- ISSN:1350-4177
- Abstract
- The effect of thermal and thermosonic treatments on the inactivation kinetics of polyphenol oxidase (PPO) in mushroom (Agaricus bisporus) was studied in 55-75°C temperature range. In both the processes, the inactivation kinetics of PPO followed a first-order kinetics (R2 = 0.941-0.989). The D values during thermal inactivation varied from 112 ± 8.4 min to 1.2 ± 0.07 min while they varied from 57.8 ± 6.1 min to 0.88 ± 0.05 min during thermosonic inactivation at the same temperature range. The activation energy during thermal inactivation was found to be 214 ± 17 kJ/mol, while it was 183 ± 32 kJ/mol during thermosonic inactivation. The inactivating effect of combined ultrasound and heat was found to synergistically enhance the inactivation kinetics of PPO. The D values of PPO decreased by 1.3-3 times during thermosonic inactivation compared to the D values of PPO during thermal inactivation at the temperature range. Therefore, thermosonication can be further developed as an alternative to "hot break" process of mushroom. © 2012 Elsevier B.V. All rights reserved.
- Relation
- Ultrasonics Sonochemistry Vol. 20, no. 2 (2013), p. 674-679
- Rights
- Copyright 2012 Elsevier B.V.
- Rights
- This metadata is freely available under a CCO license
- Subject
- 0306 Physical Chemistry (Incl. Structural); Inactivation; Mushroom; Polyphenol oxidase; Thermal; Ultrasound; Thermosonics; Activation energy; Ultrasonics; Kinetics; Catechol oxidase; Fungal extract; Agaricus bisporus; Enzyme activity; Enzyme inactivation; Temperature; Thermodynamics; Thermosonication; Thermostability
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