Academic Bibliography
https://biblio.ugent.be/
Ghent University Academic Bibliography2000-01-01T00:00+00:001monthlyGas washing bottle incubation system for monitoring the growth of Listeria monocytogenes under controlled conditions
https://biblio.ugent.be/publication/01HR9PDD8125PE5WWZGR8PDTQ6
Oğuz, SerenKuuliala, LottaSomrani Achouri, MariemRagaert, PeterDevlieghere, Frank2022Modified atmosphere packaging (MAP) is the removal and/or replacement of the atmosphere surrounding the product inside the package with an alternative gas mixture (e.g. CO2/O2/N2). It is mostly used to prolong the shelf life of foods. However, increasing the shelf life of some refrigerated products can favor the growth of pathogenic bacteria such as Listeria monocytogenes, which can grow at low temperatures and survive for a long time in/on food. That is why this foodborne pathogen has been considered as a major concern for the food industry. MAP products are generally processed by using initial gas flushing through the package before the package is enclosed. However, microbial activity, CO2 production, O2 consumption and dissolution of both CO2 and O2 in food products may change the initial gas concentration inside the package. In literature, a very limited amount of studies are available where microbial growth was monitored during storage and under well-controlled atmosphere conditions so far. Thus, this work aims to develop a new experimental setup allowing the investigation of the growth of micro-organisms in a liquid medium under controlled atmospheres and temperature conditions. The system provides gas flushing experiments in gas washing (drechsel) bottles. With this setup, not only the dissolved gas content in the growth medium will be kept saturated at the desired composition but also sampling during the experiments will be possible without any interference. The effectiveness of the setup has been validated by investigating the effect of high CO2 and low O2 on the growth of L. monocytogenes at 4℃.application/pdfhttps://biblio.ugent.be/publication/01HR9PDD8125PE5WWZGR8PDTQ6http://hdl.handle.net/1854/LU-01HR9PDD8125PE5WWZGR8PDTQ6https://biblio.ugent.be/publication/01HR9PDD8125PE5WWZGR8PDTQ6/file/01HR9PVTKRQAFV3VPVN7GACFGPundNo license (in copyright)info:eu-repo/semantics/restrictedAccessListeria monocytogenesModified atmosphere packaging (MAP)gas washing bottlesustainable packagingGas washing bottle incubation system for monitoring the growth of Listeria monocytogenes under controlled conditionsconferenceinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionA novel gas-washing bottle incubation system allowing for modeling Listeria monocytogenes growth under well-controlled conditions
https://biblio.ugent.be/publication/01HR9MVFDNN8195PWSSETN4VD4
Oğuz, SerenBonanni, EleonoraMarquez Blanco, Carlos ManuelSomrani Achouri, MariemKuuliala, LottaRagaert, PeterDevlieghere, Frank2023Introduction:
The prediction of microbial growth and survival under various modified atmosphere packaging (MAP) conditions is an important tool for assessing safety and shelf life of food products. Listeria monocytogenes has become a serious problem in refrigerated MAP products because this pathogen can grow at low temperatures. Much attention has been paid to predicting L. monocytogenes growth under different atmospheres, which requires data collection under constant conditions. However, microbial activity as well as production, consumption, and dissolution of CO2/O2 may occur during storage. Therefore, there is a need for a specific setup to eliminate these possible dynamic changes.
Purpose:
This work aims to develop and to use a gas-washing bottle incubation system (GBIS) for investigating and modeling L. monocytogenes growth at 4℃ while maintaining constant well-defined atmospheres during storage.
Method:
L. monocytogenes inoculated (3.0 log CFU/ml) in brain heart infusion (BHI) was investigated at 4℃ for 13 days under different atmospheres (O2%/CO2%: 20/0, 0/20, 0/40, 0/60). BHI broth was placed in three gas-washing bottles connected in series to test one atmosphere. Each condition was performed twice. Gas flushing was performed once a day to keep headspace atmosphere stable. Sampling was done before each flushing to obtain growth curves for each bottle. Primary nonlinear growth models (Logistic, Gompertz, Baranyi, and Huang) were used to fit these curves.
Results:
GBIS was found to be successful in investigating the effect of modified atmospheres on L. monocytogenes growth, by keeping the desired atmosphere constant. Growth reduced significantly (p<0.05) and µmax decreased as CO2 concentration increased, indicated by primary models and growth curves.
Significance:
GBIS is promising in fulfilling the need to study bacterial growth in different atmospheric conditions. Predictive microbiology modeling will be employed for designing optimum MAP systems and ensuring food safety.application/pdfhttps://biblio.ugent.be/publication/01HR9MVFDNN8195PWSSETN4VD4http://hdl.handle.net/1854/LU-01HR9MVFDNN8195PWSSETN4VD4https://biblio.ugent.be/publication/01HR9MVFDNN8195PWSSETN4VD4/file/01HR9NPPHQQVPDDX5V06KA0Y2RengNo license (in copyright)info:eu-repo/semantics/restrictedAccessListeria monocytogeneswell-controlled modified atmospheresflushingsustainable packagingfood safetyA novel gas-washing bottle incubation system allowing for modeling Listeria monocytogenes growth under well-controlled conditionsconferenceinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionDegradable plasma polymerized poly (ethylene glycol)-like coatings as a matrix for controlled-release of components in food related applications
https://biblio.ugent.be/publication/01HQWYTPMJSKXCWH07R1PC4JTQ
Zabihzadeh Khajavi, MaryamNikiforov, AntonNilkar, MaryamDevlieghere, FrankRagaert, PeterDe Geyter, Nathalie2023Here we employed an atmospheric pressure aerosol-assisted plasma deposition
method to develop a biodegradable PEG-like coating for controlled-release applications.
Different plasma operating parameters were optimized, including; power, monomer flow
rate, and the gap between the plasma and substrate. The findings revealed that moderate
power density (3 and 3.5 W/ (L /min)) and low distances should be applied to obtain smooth
conformal coatings with reasonable water stability, along with retaining the structure of PEG
polymer.application/pdfhttps://biblio.ugent.be/publication/01HQWYTPMJSKXCWH07R1PC4JTQhttp://hdl.handle.net/1854/LU-01HQWYTPMJSKXCWH07R1PC4JTQhttps://biblio.ugent.be/publication/01HQWYTPMJSKXCWH07R1PC4JTQ/file/01HQWYYX9BHAANXG2GMDHA3X1YundNo license (in copyright)info:eu-repo/semantics/openAccessDegradable plasma polymerized poly (ethylene glycol)-like coatings as a matrix for controlled-release of components in food related applicationsconferenceinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersion