Application of Electromagnetic Radiations and Superheated Steam for Enzyme Inactivation in Green Bell Pepper.

Jeevitha, G. C. and Anto, A. and Chakkaravarthi, A. and Umesh Hebbar, H. (2015) Application of Electromagnetic Radiations and Superheated Steam for Enzyme Inactivation in Green Bell Pepper. Journal of Food Processing and Preservation, 39 (6). pp. 784-792.

PDF Journal of Food Processing and Preservation Volume 39, Issue 6, December 2015, Pages 784–792.pdf - Published Version Restricted to Registered users only Download (287kB)

Abstract

The effect of electromagnetic radiation (microwave and infrared) based dry blanching and superheated steam enzyme inactivation on product quality of green bell pepper was evaluated and the performance was compared with that of water and steam blanching. Processing conditions (time and temperature) were standardized mainly on the basis of degree of inactivation of peroxidase enzyme. Superheated steam and water blanching required lesser duration (110 and 140 s, respectively) when compared to steam (180 s), microwave (230 s) and infrared (580 s) blanching. The retention of ascorbic acid (91.1%) and soluble protein (91.6%) was higher in microwave and superheated steam-blanched slices, respectively. Although texture of infrared blanched slices was firmer compared to unblanched as well as blanched by other methods, it had higher retention of β-carotene (131.2%) and chlorophyll (136.4%) compared to unblanched. PRACTICAL APPLICATIONS Blanching is one of the preprocessing steps before drying, freezing and canning of most of the vegetables. Conventional water and steam blanching has many drawbacks such as loss of water soluble nutrients and effluent generation. The electromagnetic radiation-based dry blanching methods employed in the present study can overcome these drawbacks and result in a continuous process. This study also explored that superheated steam blanching can be effectively used for enzyme inactivation which in turn requires lesser processing time besides minimizing the loss of nutrients. This research area has ample scope for further studies and the techniques have great potential to be used as an alternative to conventional blanching methods.

Item Type:	Article
Uncontrolled Keywords:	electromagnetic radiation, green bell pepper, Blanching, enzyme inactivation
Subjects:	600 Technology > 08 Food technology > 30 Spices/Condiments 600 Technology > 08 Food technology > 06 Preservation and Storage > 05 Microwave heating
Divisions:	Food Engineering
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	17 Feb 2016 08:21
Last Modified:	01 Oct 2018 09:14
URI:	http://ir.cftri.res.in/id/eprint/12108

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