High pressure processing for food safety

• Autorzy: Fonberg-Broczek M. , Windyga B. , Szczawinski J. , Szczawinska M. , Pietrzak D. , Prestamo G.
• Języki publikacji: EN

Abstrakty

EN

Food preservation using high pressure is a promising technique in food industry as it offers numerous opportunities for developing new foods with extended shelf-life, high nutritional value and excellent organoleptic characteristics. High pressure is an alternative to thermal processing. The resistance of microorganisms to pressure varies considerably depending on the pressure range applied, temperature and treatment duration, and type of microorganism. Generally, Gram-positive bacteria are more resistant to pressure than Gram-negative bacteria, moulds and yeasts; the most resistant are bacterial spores. The nature of the food is also important, as it may contain substances which protect the microorganism from high pressure. This article presents results of our studies involving the effect of high pressure on survival of some pathogenic bacteria - Listeria monocytogenes, Aeromonas hydrophila and Enterococcus hirae - in artificially contaminated cooked ham, ripening hard cheese and fruit juices. The results indicate that in samples of investigated foods the number of these microorganisms decreased proportionally to the pressure used and the duration of treatment, and the effect of these two factors was statistically significant (level of probability, P ≤ 0.001). Enterococcus hirae is much more resistant to high pressure treatment than L. monocytogenes and A. hydrophila. Mathematical methods were applied, for accurate prediction of the effects of high pressure on microorganisms. The usefulness of high pressure treatment for inactivation of microorganisms and shelf-life extention of meat products was also evaluated. The results obtained show that high pressure treatment extends the shelf-life of cooked pork ham and raw smoked pork loin up to 8 weeks, ensuring good micro-biological and sensory quality of the products.

Słowa kluczowe

EN

food product; Aeromonas hydrophila; Listeria monocytogenes; microbiological quality; high pressure processing; sensory quality; Enterococcus hirae; food preservation; food quality; food safety

• Wydawca: -
• Czasopismo: Acta Biochimica Polonica
• Rocznik: 2005
• Tom: 52
• Numer: 3
• Opis fizyczny: p.721-724,fig.,ref.

Twórcy

autor

Fonberg-Broczek M.

• Polish Academy of Sciences, Warsaw, Poland

autor

Windyga B.

autor

Szczawinski J.

autor

Szczawinska M.

autor

Pietrzak D.

autor

Prestamo G.

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