Journal
JOURNAL OF FOOD ENGINEERING
Volume 117, Issue 1, Pages 1-7Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2013.01.031
Keywords
Wheat germ; Microwave; Lipase; Lipoxygenase; Stabilization
Categories
Funding
- China Postdoctoral Science Foundation [2012M521020]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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The purpose of this research is to study the stabilization effect of microwave on wheat germ using continuous microwave processing equipment. Results from the study indicated that microwave technique had a significant stabilization effect on wheat germ. When the on-line processing capacity of wheat germ was 20 kg/h, the optimal conditions for wheat germ stabilization were microwave power of 4 kW, the processing time of 8 min and ventilation rate of 60 N m(3)/h. Under such conditions, the residual lipase activity decreased to 14.01% of that of the raw wheat germ. The lipoxygenase lost its activity completely under such intensity microwave processing. After 60 days' accelerated storage, the acid value increased only 6.56% of that of the stabilized wheat germ before storage. In addition, microwave could cause the death of harmful microorganisms. It was clear that the continuous microwave stabilization process was practicable for wheat germ stabilization. (c) 2013 Elsevier Ltd. All rights reserved.
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