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Member of:
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Ir. Eirini Velliou
Chemical Engineer
BioTeC-Bioprocess Technology and Control
Department of Chemical Engineering
Katholieke Universiteit Leuven
Research Title:
Microbial dynamics under heat stress
Research Content/Goal:
The aim of this research is the in depth study of the microbial stress adaptation and the construction of a predictive model which will include the microbial dynamics in response to stress. The micro-organism chosen for the purposes of this research is E.coli K12 MG1655. The resistance of E. coli to heat after pre-exposure to various time-temperature and various initial pH values of the growth medium is being investigated. Furthermore (a) biomarker(s) related with thermotolerance will be selected, identified and qualified. Finally, the collected experimental data related with microbial and biomarker(s) dynamics in responce to stress conditions will be incorporated in advanced, white box predictive models.
Velliou, E., Van Derlinden, E., Cappuyns, A., Geeraerd, A., Devlieghere, F., Van Impe, J. (2012). Heat inactivation of Escherichia coli K12 MG1655 : Effect of microbial metabolites in spent medium. Journal of Thermal Biology, 37 (1), 72-78.
Velliou, E., Van Derlinden, E., Cappuyns, A., Aerts, D., Nikolaidou, E., Geeraerd, A., Devlieghere, F., Van Impe, J. (2011). Quantification of the influence of Trimethylamine-N-Oxide (TMAO) on the heat resistance of Escherichia coli K12 at lethal temperatures. Letters in Applied Microbiology, 52 (2), 116-122.
Velliou, E., Van Derlinden, E., Cappuyns, A., Nikolaidou, A., Geeraerd, A., Devlieghere, F., Van Impe, J. (2011). Towards the quantification of the effect of acid treatment on the heat tolerance of Escherichia coli K12 at lethal temperatures. Food Microbiology, 28 (accepted), 702-711.
Tsironi, T., Stamatiou, A., Giannoglou, M., Velliou, E., Taoukis, P. (2011). Predictive modelling and selection of Time Temperature Integrators for monitoring the shelf life of modified atmosphere packed gilthead seabream fillets. LWT - Food Science and Technology, 44 (4), 1156-1163.
Tsironi, T., Gogou, E., Velliou, E., Taoukis, P. (2008). Application and Validation of the TTI based chill chain management system SMAS (Safety Monitoring and Assurance System) on shelf life optimization of vacuum packed chilled tuna. International Journal of Food Microbiology, 128 (1), 108-115.
Velliou, E., Juneja, V., Marks, H., Huang, L., Van Impe, J., Van Derlinden, E. (2011). Modelling the induced thermotolerance due to heat, acid shock and rising temperature. (Valdramidis, V.P., Ed. Van Impe, Jan, Ed.). Nova Publishers, Hauppauge, New York, USA.
Velliou, E., Van Derlinden, E., Mertens, L., Cappuyns, A., Geeraerd, A., Devlieghere, F., Van Impe, J. (2011). Effect of a gelified matrix on the heat inactivation of E. coli, Salmonella Typhimurium and Listeria monocytogenes. . International Conference on Predictive Modelling of Food Quality and Safety. Dublin, Ireland, 12-15 September 2011 (accepted).
Velliou, E., Van Derlinden, E., Cappuyns, A., Goossens, J., Geeraerd, A., Devlieghere, F., Van Impe, J. (2011). Heat adaptation of Escherichia coli K12: effect of acid shock and glucose. Proceedings of the 11th International Conference on Engineering and Food. International Conference on Engineering and Food. Athen, Greece, 22-26 May 2011 (pp. 475-476).
Velliou, E., Cappuyns, A., Van Derlinden, E., Geeraerd, A., Devlieghere, F., Van Impe, J. (2009). The effect of pre-acid shock in the induced heat resistance of Escherichia coli K12 at lethal temperatures. In Juneja, V. (Ed.), Schaffner, D. (Ed.), Proceedings of the 6th International Conference on Predictive Modeling in Foods. 6th International Conference on Predictive Modeling in Foods. Washington (USA), September 8-12, 2009 (pp. 216-219).
Velliou, E., Gogou, E., Taoukis, P. (2007). Study of New Time Temperature Indicators (TTI) for the Chill Chain Management of food. . 6th National Scientific Conference of Chemical Engineering. Athens, Greece, May-June 2007.
Busschaert, P., Velliou, E., Van Derlinden, E., Uyttendaele, M., Geeraerd, A., Van Impe, J. (2010). Estimation of inactivation model parameters using a Bayesian approach. International ICFMH Symposium - Food Micro 2010. 22nd Symposium of the International Committee on Food Microbiology and Hygiene (ICFMH) (FoodMicro2010). Copenhagen (Denmark), 30 August - 3 September 2010, Abstract No. PEC2.56.
Velliou, E., Van Derlinden, E., Cappuyns, A., Geeraerd, A., Devlieghere, F., Van Impe, J. (2010). The effect of structured environment on the inactivation of E. coli K12 at lethal temperatures. International ICFMH Symposium - Food Micro 2010. 22nd Symposium of the International Committee on Food Microbiology and Hygiene (ICFMH) (FoodMicro2010). Copenhagen (Denmark), 30 August - 3 September 2010, Abstract No. PEC1.94.
Velliou, E., Van Derlinden, E., Aerts, D., Nikolaidou, E., Geeraerd, A., Van Impe, J. (2009). The influence of Trimethylamine-N-Oxide (TMAO) on the heat resistance of Esherichia coli K12 at lethal temperatures. Book of abstracts of the First international conference on MICROBIAL STRESS - from molecules to systems. First international conference on MICROBIAL STRESS - from molecules to systems. Semmering (Austria), May 7-10, 2009, 153-154.
Velliou, E., D'Huys, P., Van Derlinden, E., Geeraerd, A., Van Impe, J. (2009). Adaptation of Escherichia coli K12 at lethal temperatures: consequences of heat pre-treatment of the medium and acidic pre-history. Book of abstracts of the First international conference on MICROBIAL STRESS - from molecules to systems. First international conference on MICROBIAL STRESS - from molecules to systems. Semmering (Austria), May 7-10, 2009, 151-152.
Velliou, E., Van Derlinden, E., Cappuyns, A., Vermeulen, A., Nikolaidou, E., Geeraerd, A., Devlieghere, F., Van Impe, J. (2009). Quantifying the effect of (in)organic acids on the thermal inactivation of Escherichia coli. Book of Abstracts III International Conference on Environmental, Industrial and Applied Microbiology (BioMicroWorld2009). BioMicroWorld 2009, III International Conference on Environmental, Industial and Applied Microbiology. Lisbon (Portugal), December, 2-4, 2009.
Velliou, E., Taoukis, P., Gogou, E. (2007). Study and validation of state of the art Time Temperature Integrators for monitoring shelf life of food products in the chill chain. Institute of Food Technologists 2007 - Annual Meeting. Chicago, Illinois, USA, July-August 2007.
Two OPTEC professors have been awarded three "Gouden Krijtjes", the yearly teaching awards given by the organization of engineering students (vtk). Prof. Lombaert was awarded the prize for the best course in civil engineering, and Prof. Diehl the prizes for the best professor and the best course in mathematical engineering (where he teaches numerical optimization). They received these awards at the yearly "proffentap" where experienced students taught them how to draft beer professionally.
