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http://dx.doi.org/10.11002/kjfp.2012.19.5.665

Effects of Pulsed Electric Fields on Juice Expression Characteristics of Malus pumila Fruit  

Lim, Jeong-Ho (Korea Food Research Institute)
Ahn, Seong-Hwan (Korea Food Research Institute)
Lee, Dong-Un (School of Food Science and Technology, Chung-Ang University)
Kim, Young-Ho (Korea Food Research Institute)
Park, Kee-Jai (Korea Food Research Institute)
Publication Information
Food Science and Preservation / v.19, no.5, 2012 , pp. 665-671 More about this Journal
Abstract
The effects of pretreatment by pulsed electric fields (PEFs) on the juice expression characteristics of the Malus pumila fruit were investigated. Fresh fruits were divided into quarters, were produced on a laboratory scale (100 g apples per lot) by pretreatment with electric fields at two different field intensities (1, 2 kV/cm; n=50, 100, 200, and 400 pulses), and were then pressed at room temperature. Relative to the control samples, the juice yield increased with increasing field intensities. The total phenolics and antioxidant activity were higher in the juice from the PEF-treated fruit than in the juice from the untreated fruit. There was no significant difference in soluble-solid and reducing sugar contents between the PEF-treated and untreated fruits. These results suggest that PEF pretreatment may be useful for increasing the juice yield, total phenolics, and antioxidant activity of the Malus pumila fruit.
Keywords
Malus pumila; pulsed electric fields; processing; expressing; total phenolics;
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Times Cited By KSCI : 7  (Citation Analysis)
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