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3 results on '"Georgalaki, Marina"'

1. Milk protein fragments induce the biosynthesis of macedocin, the lantibiotic produced by Streptococcus macedonicus ACA-DC 198

Author

Georgalaki, Marina, Papadelli, Marina, Chassioti, Elina, Anastasiou, Rania, Aktypis, Anastassios, De Vuyst, Luc, Van Driessche, Gonzalez, Devreese, Bart, and Tsakalidou, Effie

Subjects
Antibiotics -- Research, Milk proteins -- Research, Streptococcus -- Genetic aspects, Streptococcus -- Physiological aspects, Biological sciences
Abstract

The mode of the induction of the biosynthesis of macedocin, the lantibiotic produced by Streptococcus macedonicus ACA-DC 198, is studied. The chemically prepared [[alpha].sub.S1]-casein fragment 37-55 is able to induce macedocin biosynthesis and milk protein degradation fragments have displayed a bacteriocin induction activity.

Published
2010

2. Use of artificial neural networks and a gamma-concept-based approach to model growth of and bacteriocin production by streptococcus macedonicus ACA-DC 198 under simulated conditions of Kasseri Cheese production

Author

Poirazi, Panayiota, Georgalaki, Marina D., Leroy, Frederic, Aktypis, Anastassios, De Vuyst, Luc, and Tsakalidou, Effie

Subjects
Streptococcus -- Genetic aspects, Streptococcus -- Physiological aspects, Hydrogen-ion concentration -- Research, Biological sciences
Abstract

A kinetic study was conducted to investigate the influence of temperature, pH, and salt concentration conditions prevailing during Kasseri cheese production on the growth of Streptococcus macedonicus ACA-DC 198, as well as on the production of macedocin. The results showed that artificial neural networks (ANNs), though less suitable for biological interpretation, outperform a more traditional model based on the gamma concept in describing the growth behavior and bacteriocin production capacity of S. mecadonicus ACA-DC 198.

Published
2007

3. Macedocin, a food-grade lantibiotic produced by Streptococcus macedonicus ACA-DC 198

Author

Georgalaki, Marina D., Berghe, Erika Van den, Kritikos, Dimitrios, Devreese, Bart, Beeumen, Jozef Van, Kalantzopoulos, George, Vuyst, Luc De, and Tsakalidou, Effie

Subjects
Food poisoning -- Prevention, Antibiotics, Microbiological synthesis, Spores (Bacteria), Biological sciences
Abstract

Research describes the structure and antimicrobial spectrum and mechanism of action of the bacteriocin, macedocin, produced by Streptococcus macedonicus ACA-DC 198. Results indicate that macedocin inhibits a broad spectrum of lactic acid bacteria and food spoilage and pathogenic bacteria. The bacteriocin protects against clostridia in cheese production.

Published
2002

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