Abstract
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 20–120 s 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 (ΔE < 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.
Original language | English (US) |
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Pages (from-to) | 270-276 |
Number of pages | 7 |
Journal | Food Chemistry |
Volume | 290 |
DOIs | |
State | Published - Aug 30 2019 |
Bibliographical note
Publisher Copyright:© 2019 Elsevier Ltd
Keywords
- Cold atmospheric plasma
- Cronobacter sakazakii
- Milk powder
- Non-thermal process
- Physicochemical properties analysis