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Deprecated: Implicit conversion from float 294.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Food+Microbiol 2022 ; 102 (ä): 103922 Nephropedia Template TP
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Effects of 1-methylcyclopropene and gaseous ozone on Listeria innocua survival and fruit quality of Granny Smith apples during long-term commercial cold storage #MMPMID34809948
Sheng L; Shen X; Su Y; Xue Y; Gao H; Mendoza M; Green T; Hanrahan I; Zhu MJ
Food Microbiol 2022[Apr]; 102 (ä): 103922 PMID34809948show ga
This study evaluated the impact of 1-methylcyclopropene (1-MCP), an ethylene synthesis inhibitor, followed by long-term commercial cold storage with low-dose gaseous ozone on the microbiological safety and quality of fresh apples. Granny Smith apples were inoculated with or without Listeria innocua, treated with or without 1.0 mg/L 1-MCP for 24 h, then subjected to commercial cold storage conditions including refrigerated air (RA, 0.6 degrees C, control), controlled atmosphere (CA, 2% O(2), 1% CO(2,) 0.6 degrees C), and CA with 51-87 mug/L ozone gas for up to 36 weeks. RA storage reduced L. innocua on apples by up to 3.6 log(10) CFU/apple. CA had no advantage over RA in controlling Listeria. Continuous ozone gas application resulted in an additional approximately 2.0 log(10) CFU/apple reduction of L. innocua (total reduction up to 5.7 log(10) CFU/apple) and suppressed native bacteria and fungi. Treatment with 1-MCP had a minor impact on survival of L. innocua or background microbiota on apples, while it significantly delayed fruit ripening and reduced the incidence of superficial scald and internal browning. In summary, 1-MCP treatment followed by CA storage with low-dose continuous ozone gas can effectively control Listeria on fresh apples and delay fruit ripening.