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http://dx.doi.org/10.9721/KJFST.2017.49.4.408

Pulsed electric field pasteurization of mandarin and carrot juices  

Lee, Seung Jo (Department of Food Science and Technology, Seoul Women's University)
Choi, Hyuk Joon (BK bio)
Min, Sea Cheol (Department of Food Science and Technology, Seoul Women's University)
Publication Information
Korean Journal of Food Science and Technology / v.49, no.4, 2017 , pp. 408-414 More about this Journal
Abstract
Effects of pulsed electric field (PEF) processing on growth inhibition of indigenous aerobic microorganisms and the quality of mandarin and carrot juices were investigated. Mandarin juice was PEF-treated at 15-23 kV/cm for $23-241{\mu}s$, whereas carrot juice was treated at 13-14 kV/cm for 127-198 s. At $25^{\circ}C$ (inlet temperature), PEF treatments at 23 kV/cm for $104{\mu}s$ and 14 kV/cm for $198{\mu}s$ reduced the numbers of total mesophilic aerobes by $6.3{\pm}0.8$ and $5.5{\pm}0.9{\log}\;CFU/mL$ in mandarin juice and carrot juice, respectively. Elevation of inlet temperature to $40^{\circ}C$ increased the reduction rates in both juices. In general, the treatments resulting in the highest microbial inhibition at 25 and $40^{\circ}C$ did not alter the physicochemical and nutritional properties of both juices (p>0.05). PEF is a feasible technology to pasteurize mandarin and carrot juices commercially, with minimal quality deterioration.
Keywords
non-thermal treatment; pulsed electric field; mandarin juice; carrot juice; pasteurization;
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