Abstract
The objective of this research is to avail an optimum cold plasma generating device for inactivating Aspergillus flavus from nuts surface. For this purpose, a variety of tests were carried out using three applicable plasma generating devices such as atmospheric pressure capacitive coupled plasma (AP-CCP), direct current diode plasma (DC-DP), and inductively coupled plasma (ICP) for different values of input power, pressure, and irradiation time, using Argon gas. The experimental results were achieved upon performing irradiation of sample pistachio nuts by the aforementioned three devices. Finally, after data analysis based on two factors of toxin inactivation amount and cost feasibility for large scale industrial applications, the AP-CCP device was found to be as an optimum device with an acceptable 4 Logs fungi reduction. However, on the basis of single factor, i.e. toxin reduction rate, the DC-DP device works better with a highest fungi reduction rate of 5 Logs, using Argon in 1 Torr vacuum pressure, 300 W and 20 min irradiation.
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Acknowledgements
We are thankful to Mr. Baalall, Animal Husbandry Faculty, Tehran University, as well as Dr. Shams. M. Khajenasiri and Dr. S. Hashemi, Pastor Laboratory Tehran, Iran, for their kind expertise assistance in facilitating the required microbial cultures in this research work. In addition, the thorough language editing of the manuscript contributed by Dr. N. Zarsaav is sincerely acknowledged by Authors.
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Ghorashi, A.H., Tasouji, M.A.R. & Kargarian, A. Optimum cold plasma generating device for treatment of Aspergillus flavus from nuts surface. J Food Sci Technol 57, 3988–3994 (2020). https://doi.org/10.1007/s13197-020-04429-y
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DOI: https://doi.org/10.1007/s13197-020-04429-y