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KMID : 1024420150190030104
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Food Engineering Progress
2015 Volume.19 No. 3 p.104 ~ p.110
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Effects of Grapefruit Seed Extract for Antibacterial Activity on the Coated Packaging
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Lee Jin-Won
Yoon Jin-Ho
Park Jang-Woo
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Abstract
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In this study, effects of grapefruit seed extract (GFSE) for the antibacterial activity on the coated packaging were investigated. Two-gram positive bacteria (Bacillus cereus, Listeria monocytogenes) and two-gram negative bacteria (Escherichia coli, Salmonella enteritidis) were used to evaluate the anti-microbial abilities of a packaging system. Clear zone size for gram positive bacteria ranged from 5 mm to 21 mm at various GFSE concentrations (60 ppm-5,000 ppm). Also, the clear zone size for gram negative bacteria ranged from 0 mm to 7 mm at various GFSE concentrations. In case of coated packaging system, the clear zone size for gram positive bacteria ranged from 5 mm to 19 mm at various GFSE concentrations (60-5,000 ppm). The clear zone size for gram negative bacteria ranged from 7 mm to 11 mm at various GFSE concentrations. In case of storage safety test for ready-to-eat model food on the coated packaging system at 337oC, the maximum storage time of 1,000 ppm, 5,000 ppm, and 10,000 ppm on GFSE coated packaging were 11 h, 16 h, and 18 h, respectively. Also the colony forming units of 1,000, 5,000, and 10,000 ppm were 4.5 log CFU/g, 4.8 log CFU/g, and 4.3 log CFU/g, respectively.
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KEYWORD
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grapefruit seed extract (GFSE) , ready-to-eat food , coated packaging system , gram positive and negative bacteria ,
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