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. 2021 Sep 18;30(12):1535-1542.
doi: 10.1007/s10068-021-00978-w. eCollection 2021 Nov.

Effects of packaging parameters on the microbial decontamination of Korean steamed rice cakes using in-package atmospheric cold plasma treatment

Joo Hyun Kang  1 , Ye Jeong Jeon  1 , Sea Cheol Min  1
Affiliations

Effects of packaging parameters on the microbial decontamination of Korean steamed rice cakes using in-package atmospheric cold plasma treatment

Joo Hyun Kang et al. Food Sci Biotechnol. .

Abstract

The effects of packaging materials, package shape, and secondary packaging on the inactivation of indigenous mesophilic aerobic bacteria in Korean steamed rice cakes using in-package atmospheric dielectric barrier discharge cold plasma (ADCP) treatment were investigated. Inactivation of indigenous mesophilic aerobic bacteria by ADCP treatment (21 kV, 3 min) was significantly increased by 0.6 and 0.8 log CFU/g (p < 0.05) from 0.7 ± 0.1 and 0.5 ± 0.1 CFU/g, respectively, when polypropylene (PP) and low-density polyethylene (LDPE) were laminated with nylon, respectively. Secondary packaging lowered the inactivation level by 0.7-0.8 log CFU/g from 1.1 to 1.3 log CFU/g. In-package ADCP treatment did not alter the water vapor permeability, oxygen transmission rate, and tensile properties of PP, LDPE, nylon/PP, and nylon/LDPE. Thus, the results demonstrated that lamination of PP or LDPE with nylon and treatment before secondary packaging may be effective strategies for microbial inactivation by in-package ADCP treatment.

Keywords: Cold plasma; Microbial decontamination; Package properties; Plastic package; Rice cake.

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Conflict of interest statement

Conflict of interestThe authors declare no conflict of interest.

Figures

Fig. 1
Fig. 1
Images of a steamed rice cake-containing nylon/low-density polyethylene (LDPE) pouch package (A), a polyethylene terephthalate (PET) semi-rigid package (B), a nylon/LDPE semi-rigid package with a PET frame (C), a PET semi-rigid package placed in a nylon/LDPE pouch (secondary packaging) (D), and the PET frame used to structure the semi-rigid package (E)
Fig. 2
Fig. 2
Schematic diagram of the in-package atmospheric dielectric barrier discharge cold plasma treatment system used in the current study
Fig. 3
Fig. 3
Cross-sectional view of the secondary package demonstrating its structure, including an empty space between the primary and secondary packages
See this image and copyright information in PMC

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