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Int J Food Microbiol
Title: | Characterization of spoilage markers in modified atmosphere packaged iceberg lettuce |
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Author(s): | Ioannidis AG; Kerckhof FM; Riahi Drif Y; Vanderroost M; Boon N; Ragaert P; De Meulenaer B; Devlieghere F; |
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Address: | "LFMFP, Laboratory of Food Microbiology and Food Preservation, Partner in Food2Know, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium; nutriFOODchem, Research Group Food Chemistry and Human Nutrition, Partner in Food2Know, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium. Electronic address: ioannidisang.g@gmail.com. Center for Microbial Ecology and Technology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium. LFMFP, Laboratory of Food Microbiology and Food Preservation, Partner in Food2Know, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium. nutriFOODchem, Research Group Food Chemistry and Human Nutrition, Partner in Food2Know, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium" |
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Journal Title: | Int J Food Microbiol |
Year: | 2018 |
Volume: | 20180422 |
Issue: | |
Page Number: | 1 - 13 |
DOI: | 10.1016/j.ijfoodmicro.2018.04.034 |
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ISSN/ISBN: | 1879-3460 (Electronic) 0168-1605 (Linking) |
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Abstract: | "Fresh cut iceberg lettuce spoilage was studied considering the microbial and biochemical activity, the formation of volatile organic compounds (VOC) and consumer acceptability. Lettuce was packaged under three different packaging conditions and stored at 4?ª+ degrees C for 10?ª+days: anaerobic packaging (ANAER), equilibrium modified atmosphere packaging with 3% O(2) (EMAP) and perforated packages (AIR). Results indicated a clear distinction between packaging conditions. EMAP and AIR resulted in a short shelf life (=5.6?ª+days) which was limited due to browning, leading to consumer rejection as assessed via the Weibull hazard analysis method, while no off-odors were detected. Culture- independent 16?ª+s rRNA gene amplicon sequencing revealed Pseudomonas spp. as the dominating species. In contrast, under ANAER conditions, lactic acid bacteria dominated with genera of Leuconostoc spp. and Lactococcus spp. proliferating, while also oligotypes of Pseudomonas spp. were found. Spoilage under ANAER occurred after 6.6?ª+days and it was related to strong fermentative-like off-odors that were present by the end of storage. As revealed by selective ion flow tube mass spectrometry (SIFT-MS), these odors were associated with several VOCs such as: ethanol, 3-methyl-1-butanol, 2,3-butanediol, (Z)-3-hexen-1-ol, hexanal, acetic acid, ethyl acetate and dimethyl sulfide. Panelists rejected the iceberg lettuce due to the formation of off-odors while the overall appearance remained good throughout the study. Hence a sensor based technology incorporated in the packaging, detecting VOCs and in particular ethanol as dominant compound, could serve as a spoilage indicator for ANAER packed lettuce, which proved to have the longest shelf life" |
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Keywords: | "Anaerobiosis/physiology Colony Count, Microbial Food Microbiology/*methods Food Packaging/*methods Food Preservation/*methods Lactococcus/classification/genetics/isolation & purification Lettuce/*microbiology Leuconostoc/classification/genetics/isolation;" |
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Notes: | "MedlineIoannidis, Angelos-Gerasimos Kerckhof, Frederiek-Maarten Riahi Drif, Yasmine Vanderroost, Mike Boon, Nico Ragaert, Peter De Meulenaer, Bruno Devlieghere, Frank eng Netherlands 2018/05/02 Int J Food Microbiol. 2018 Aug 20; 279:1-13. doi: 10.1016/j.ijfoodmicro.2018.04.034. Epub 2018 Apr 22" |
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Citation: El-Sayed AM 2024. The Pherobase: Database of Pheromones and Semiochemicals. <http://www.pherobase.com>.
© 2003-2024 The Pherobase - Extensive Database of Pheromones and Semiochemicals. Ashraf M. El-Sayed.
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