Electron beam irradiation inactivation of Bacillus atrophaeus on the PET bottle preform and HDPE bottle caps with different original colonies

被引：0

作者：

Wang, Yuan ^{[1
]}

Chen, Jinding ^{[1
]}

Zhang, Liang ^{[1
]}

Liao, Wenyan ^{[1
]}

Tong, Zhen ^{[1
]}

Liu, Jinfang ^{[1
]}

Mao, Like ^{[1
]}

Gao, Yanxiang ^{[1
]}

机构：

[1] China Agr Univ, Coll Food Sci & Nutr Engn, China Natl Light Ind Council, Key Lab Hlth Beverages, Beijing 100083, Peoples R China

来源：

RADIATION PHYSICS AND CHEMISTRY | 2021年 / 189卷

基金：

国家重点研发计划;

关键词：

Electron beam irradiation; Inactivation; Weibull model; PET bottle preform; HDPE bottle cap; INDIVIDUAL CELL HETEROGENEITY; HIGH-PRESSURE; LISTERIA-INNOCUA; FOOD; STERILIZATION; RADIATION; SPORES; FILMS; DECONTAMINATION; CHALLENGES;

D O I：

10.1016/j.radphyschem.2021.109703

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, electron beam (EB) irradiation was used for the inactivation of Bacillus atrophaeus on the surface of polythylene terephthalate (PET) bottle preform and high-density polyethylene (HDPE) bottle caps. The effects of EB irradiation doses (0,1,3,5,7,9 kGy) and original inoculated colony counts (101,102,103,104,105,106,107 CFU/ sample) were evaluated on the residues of B. atrophaeus and the quality attributes of bottle caps and preform. A Weibull model for simulating the sterilization data was established by fitting the microorganism inactivation curves with a high coefficient (R2 > 0.93). The reductions of the microorganism lethal rate (log N/N0) up to 7.11log, 6.21log, 5.59log were shown on 38 mm bottle cap, 28 mm bottle cap and bottle preform with the original colony counts of 107 CFU/sample after the EB irradiation treatment at 9 kGy, respectively. The b* values of bottle preform and caps were slightly affected and the highest color change was observed for 28 mm bottle cap treated by 9 kGy EB irradiation, which resulted in a decrease of b* value from -39.86 +/- 0.15 to -41.25 +/- 0.42. Nevertheless, EB irradiation could be applied in the decontamination of PET bottle preform and HDPE bottle caps under reasonable doses.

引用

页数：9