Laboratory for Microbiological Control of Food Products

MAIN RESEARCH THEMES

Optimization of resuscitation and enrichment of food borne pathogens for rapid detection methods in food diagnostics
As food, due to processing and the preservation techniques, presents non-optimal conditions for microorganisms, the pathogens are stressed or sublethally injured. The aim is to determine the conditions of resuscitation and enrichment of pathogens for detection and conventional microbiological analyses.

Predictive modeling of microbial inhibition and inactivation through lactic acid and pH
In food industry, organic acids are popular preservatives as they are active against a broad spectrum of spoilage organisms and already effective at low concentrations. We investigate the individual effects of undissociated lactic acid and pH on both growth and inactivation.
Use of new decontamination techniques for minimally processed vegetables.
Nowadays consumers are looking for fresh, healthy, ready-to-use and additive-free foods with the retention of the nutritional characteristics and safety. The objective is to investigate the potential of different techniques to decontaminate minimally processed vegetables. As vegetables are an important source of vitamins and antioxidants in the human diet, a comparison between the decontamination efficiency and the effect on the organoleptic properties and on the nutritional quality will be made by means of these techniques.
The use of micro-organisms as immobilized biological catalysts
By immobilizing yeast cells on a solid support, high cell densities can be obtained. Thereby, a higher volumetric productivity could be achieved during the fermentation of wort, which, in combination with continuous fermentation, results in a significant decrease of the production time of beer. The objective is to investigate the immobilization process, where the adhesion properties of both the carrier material and the yeast, are being evaluated. Also, the physiology of the immobilized yeast will be studied.

ACTIVITIES

• Growth curves;
• Factors affecting growth and survival;
• Inhibition mechanisms;
• Indicators for microbial food spoilage;
• Food fermentations.

SCIENTIFIC PRODUCTION 2005 – 2010:

24 publications, 4 books

MAIN COLLABORATION:

University Miguel Hernandez, Spain; Al. I. Cuza University of Iasi, Romania; University of Moldavia.

TEAM

Associated professor eng. Rodica ROTAR, PhD – Head of the research team
phone: 0230 522 978 int. 539, e-mail: rodicas@usv.ro

MEMBERS

Associated professor Cristina HREŢCANU, PhD, e-mail: cristinah@usv.ro
Associated professor Adriana DABIJA, PhD, e-mail: adabija@usv.ro
Lecturer bioeng. Maria POROCH – SERITAN, e-mail: mariap@usv.ro
Assistent eng. Ioana REBENGIUC, e-mail: ioanar@usv.ro