Evaluation of Cronobacter sakazakii inactivation and physicochemical property changes of non-fat dry milk powder by cold atmospheric plasma

被引：47

作者：

Chen, Dongjie ^{[1
,2
]}

Peng, Peng ^{[1
]}

Zhou, Nan ^{[1
]}

Cheng, Yanling ^{[1
]}

Min, Min ^{[1
]}

Ma, Yiwei ^{[2
]}

Mao, Qingqing ^{[2
]}

Chen, Paul ^{[1
]}

Chen, Chi ^{[2
]}

Ruan, Roger ^{[1
,2
]}

机构：

[1] Univ Minnesota, Dept Ctr Biorefining & Bioprod & Biosyst Engn, St Paul, MN 55108 USA

[2] Univ Minnesota, Dept Food Sci & Nutr, 1334 Eckles Ave, St Paul, MN USA

来源：

FOOD CHEMISTRY | 2019年 / 290卷

基金：

美国食品与农业研究所;

关键词：

Cold atmospheric plasma; Milk powder; Cronobacter sakazakii; Physicochemical properties analysis; Non-thermal process; ENTEROBACTER-SAKAZAKII; DECONTAMINATION; RESISTANCE; STRAINS; QUALITY; HEAT;

D O I：

10.1016/j.foodchem.2019.03.149

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Cronobacter sakazakii can cause life-threatening infections in neonates. Exposure to contaminated powdered food, especially milk powder, is a major route for C. sakazakii infection. Cold atmospheric plasma (CAP) is well known as a non-thermal method for inactivating microbial pathogens. This study evaluates the effectiveness of CAP on C. sakazakii in non-fat dry milk (NFDM) powder using a fluidized reaction system. The CAP treatments for 20-120s led to 1.17-3.27 log(10) reductions of C. sakazakii. C. sakazakii inactivation increased with increasing flow rate from 8 to 20 L/min. In terms of quality attributes of NFDM after the CAP treatments, no noticeable color changes (Delta E < 1.5) were observed. Moreover, no significant changes in crystallinity, amino acid composition, or phenolic content occurred following a 120s-CAP treatment. These results indicate that this fluidized reaction system combined with CAP can provide an effective antimicrobial activity with minimal effects on some physicochemical properties of NFDM powder.

引用

页码：270 / 276

页数：7

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