کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1265322 972212 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The inactivation kinetics of polyphenol oxidase in mushroom (Agaricus bisporus) during thermal and thermosonic treatments
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
The inactivation kinetics of polyphenol oxidase in mushroom (Agaricus bisporus) during thermal and thermosonic treatments
چکیده انگلیسی

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.


► Sonication and its background.
► Effect of temperature on mushroom PPO thermal stability.
► Thermal inactivation kinetics of mushroom PPO.
► The inactivation kinetics of PPO during thermosonication.
► Mechanisms of enzyme inactivation by ultrasound.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 20, Issue 2, March 2013, Pages 674–679
نویسندگان
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