Combined ohmic heating and krypton‐chlorine excilamp treatment for the inactivation of Listeria monocytogenes , Salmonella Typhimurium, and Escherichia coli O157:H7 in apple juice

2020 ◽  
Vol 40 (1) ◽  
Author(s):  
Sang‐Soon Kim ◽  
Jihun Park ◽  
Heesoo Park ◽  
Haknyeong Hong ◽  
Dong‐Hyun Kang
Keyword(s):  
Escherichia Coli ◽  
Listeria Monocytogenes ◽  
Salmonella Typhimurium ◽  
Apple Juice ◽  
Ohmic Heating ◽  
Escherichia Coli O157

Effect of Power Levels on Inactivation of Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in Tomato Paste Using 915-Megahertz Microwave and Ohmic Heating

2016 ◽  
Vol 79 (9) ◽  
pp. 1616-1622 ◽  
Author(s):  
SANG-SOON KIM ◽  
HYE-JUNG SUNG ◽  
HYO-SUN KWAK ◽  
IN-SUN JOO ◽  
JEONG-SU LEE ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Listeria Monocytogenes ◽  
Salmonella Typhimurium ◽  
Ohmic Heating ◽  
Power Level ◽  
Escherichia Coli O157 ◽  
Pathogen Inactivation ◽  
Tomato Paste ◽  
Quality Aspects ◽  
Heating Uniformity

ABSTRACT The effect of power levels on inactivation of Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in tomato paste was investigated using 915-MHz microwave heating (MW) and ohmic heating (OH). Heating uniformity, pathogen inactivation, and quality aspects were determined with 1.8-, 2.1-, 2.4-, and 3.0-kW MW and corresponding OH. GInaFit was used to analyze pathogen inactivation. The heating uniformity of MW-treated samples was inferior to that of OH-treated samples at low power levels of 1.8 to 2.4 kW but improved as the power level increased. Pathogen inactivation of MW-treated samples was significantly higher than that of OH-treated samples at low power levels of 1.8 to 2.4 kW (P < 0.05) but was not significantly different at the highest power level of 3.0 kW (P > 0.05). Quality aspects (color, pH, and lycopene content), except for L*, of MW-treated samples were not significantly degraded (P > 0.05) by increased power levels. Our results indicate that increasing power levels of MW ensures heating uniformity and microbiological safety and preserves quality aspects of tomato paste.

Simultaneous Effects of UV-A and UV-B Irradiation on the Survival of Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in Buffer Solution and Apple Juice

2019 ◽  
Vol 82 (12) ◽  
pp. 2065-2070
Author(s):  
YOON-JAE JEONG ◽  
JAE-WON HA
Keyword(s):  
Escherichia Coli ◽  
Listeria Monocytogenes ◽  
Salmonella Typhimurium ◽  
Apple Juice ◽  
Combined Treatment ◽  
Antagonistic Effect ◽  
Escherichia Coli O157 ◽  
Buffer Solution ◽  
E Coli ◽  
Uv Lamps

ABSTRACT The objective of this study was to evaluate the efficacy of simultaneous UV-A and UV-B irradiation (UV-A+B) for inactivating Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in both phosphate-buffered saline (PBS) and apple juice. A cocktail of the three pathogens was inoculated into PBS and apple juice, and then the suspensions were irradiated with UV lamps of 356 nm (UV-A) and 307 nm (UV-B). Significant (P < 0.05) log reductions of the three pathogens in PBS and apple juice were observed after a maximum dose of UV-B alone or the UV-A+B treatment, but few reductions were observed upon UV-A treatment alone. At all irradiation times, antagonistic effects were observed for the application of UV-A+B against in E. coli O157:H7, Salmonella Typhimurium, and L. monocytogenes in PBS and apple juice. The degree of antagonistic effect in apple juice was greater than that in PBS. The results of this study suggest that the combined treatment of commercial UV-A and UV-B lamps would be impractical for disinfecting juice products. HIGHLIGHTS

Inactivation of Escherichia coli O157:H7, Salmonella typhimurium and Listeria monocytogenes in apple juice with gaseous ozone

2012 ◽  
Vol 32 (1) ◽  
pp. 191-195 ◽  
Author(s):  
Mi-Ran Choi ◽  
Qian Liu ◽  
Sun-Young Lee ◽  
Ju-Hwan Jin ◽  
Sangryeol Ryu ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Listeria Monocytogenes ◽  
Salmonella Typhimurium ◽  
Apple Juice ◽  
Escherichia Coli O157 ◽  
Gaseous Ozone
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