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Cited 8 time in webofscience Cited 11 time in scopus
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Application of dielectric barrier discharge plasma for the reduction of non-pathogenic Escherichia coli and E. coli O157:H7 and the quality stability of fresh oysters (Crassostrea gigas)open access

Authors
Choi, Man-SeokJeon, Eun BiKim, Ji YoonHa Choi, EunLim, Jun SupChoi, JinsungPark, Shin Young
Issue Date
15-Jan-2022
Publisher
ELSEVIER
Keywords
DBD plasma; E. coli; E. coli O157:H7; Glycogen; Oyster
Citation
LWT-FOOD SCIENCE AND TECHNOLOGY, v.154
Indexed
SCIE
SCOPUS
Journal Title
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume
154
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/1742
DOI
10.1016/j.lwt.2021.112698
ISSN
0023-6438
Abstract
This study focuses on the efficacy of dielectric barrier discharge (DBD) plasma treatment (1.1 kV, 3 mm distance, N-2 1.5 L/min) as a non-thermal intervention to reduce non-pathogenic Escherichia coil and E. coli O157:H7 in oysters (Crassostrea gigas). Exposure times of 10-30 min by the plasma against non-pathogenic E. coli and E. coli O157:H7 resulted in a log reduction of 0.31-1.01 and 0.18-0.62, respectively, in fresh oysters. In particular, exposure to DBD plasma for 60 min indicated 2.14 log reduction (99.28% reduction) of non-pathogenic E. coli and 1.19 log reduction (93.54% reduction) of E. coli O157:H7. D 1 -values for non-pathogenic E. coli and E. coli O157:H7 were 27.78 min and 50.08 min, respectively (R-2 >= 0.98 by using a first-order kinetic model). The glycogen content (1.10-1.20 g/100 g) and texture profile (hardness, springiness, cohesiveness, resilience) of samples treated with DBD plasma did not differ significantly from that of the control (p > 0.05). Therefore, exposing oysters to DBD plasma for at least 60 min could be useful for reducing >99% of non-pathogenic E. coli and 90% of E. coli O157:H7 without causing any deleterious changes to the glycogen content and overall texture of fresh oyster.
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