Abstract
The main objective of this study was to determine the antibacterial effectiveness of high voltage atmospheric cold plasma (HVACP) alone or combined with cinnamaldehyde against S. enterica and E. coli O157:H7 in raw pineapple juice. Additional objectives were to evaluate sublethal injury in pathogen survivors and physicochemical properties of the juice. Juice with or without added cinnamaldehyde (100 μL/L) and inoculated with ∼7.0 log10 CFU/mL of S. enterica or E. coli O157:H7, was exposed to HVACP (70 kV, 60 Hz) for 0 (control), 1.0, 3.0, 5.0, and 7.0 min. HVACP or cinnamaldehyde alone failed to achieve a 5.0-log10 CFU/mL reduction of the pathogens. In contrast, reductions (log10 CFU/mL) from combined application of HVACP and cinnamaldehyde were 5.38 (S. enterica) and 5.60 (E. coli O157:H7) after 7.0 min (P < 0.05) with significant sublethal injury in S. enterica survivors (P < 0.05). The degrees Brix increased only in HVACP-treated juice without cinnamaldehyde (P < 0.05). HVACP treatment for 3 or 7 min, decreased lightness but increased chroma of the juice (P < 0.05); however, color differences were not visually detectable. The combined use of HVACP and cinnamaldehyde can enhance the microbial safety of pineapple juice with minimal changes in the physiochemical properties evaluated in this study.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
