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Benkeblia, N., “Storage technologies for date palm fruits (phoenix dactyliferous current and potential techniques”, ACTA hort, (ISHS) 994, 151-154, 2013.

has been cited by the following article:

Article

Application of Pulsed Electric Field for Microorganisms Inactivation in Date palm Fruits

1Date Palm Research Center of excellence, King Faisal University, KSA

2Agricultural Engineering Department, Faculty Agriculture, Minoufiya University, Egypt

3Food Science and Nutrition Department, Agricultural and Food Sciences College, King Faisal University, KSA


Journal of Food and Nutrition Research. 2016, Vol. 4 No. 10, 646-652
DOI: 10.12691/jfnr-4-10-3
Copyright © 2016 Science and Education Publishing

Cite this paper:
M. E. A. Mohammed, A. H. Amer Eissa, S. M. Aleid. Application of Pulsed Electric Field for Microorganisms Inactivation in Date palm Fruits. Journal of Food and Nutrition Research. 2016; 4(10):646-652. doi: 10.12691/jfnr-4-10-3.

Correspondence to: M.  E. A. Mohammed, Date Palm Research Center of excellence, King Faisal University, KSA. Email: maged3929@yahoo.ca

Abstract

Pulsed electric field (PEF) processing of liquid and semisolid food is a nonthermal technology alternative to traditional thermal preservation method with preserving nutritional and sensory values of food. In this study, the components of a laboratory scale prototype of PEF system were designed and constructed. Evaluating the performance of the prototype was carried out to inactivate the existing microorganisms (mesophilic aerobic bacteria, Yeasts and Molds) in semi-solid pitted date palm fruits, which was defined in terms of applied intensity of electric field and pulses number at a constant duration of pulse (40 µs) and (1 Hz) pulse frequency. The microbial count was decreased with the increase in intensity of electric field and pulses number. The electric field intensity of 10.82 kV/cm and 120 pulses lead to reduced total microbial counts of 1.18×104 cfu/g to less than 10 cfu/g of mesophilic aerobic bacteria in most treated samples. The electric field intensity of 8.84 kV/cm and 90 pulses lead to reduce total microbial counts of 3.27×103 cfu/g of yeasts and molds to less than 10 cfu/g that meet Saudi standards requirements. Non-detectable levels of yeasts and molds in most treated samples were observed when 10.82 kV/cm of electric field intensity and 60 of pulses number were applied. The current results indicated that PEF technology is promising as a non-thermal method for inactivation of microorganisms on date palm fruits processing.

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