Document Detail


Reduction of Bacillus subtilis, Bacillus stearothermophilus and Streptococcus faecalis in meat batters by temperature-high hydrostatic pressure pasteurization.
MedLine Citation:
PMID:  22062669     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
People have a growing preference for fresh, healthy, palatable and nutritious meals and drinks. However, as food deterioration is a constant threat along the entire food chain, food preservation remains as necessary now as in the past. High pressure processing is one of the emerging technologies being studied as an alternative to the classical pasteurization and sterilization treatments of food. Samples of fried minced pork meat were inoculated with strains of Streptococcus faecalis and with sporulating microorganisms like Bacillus subtilis and stearothermophilus. The samples were subjected to several combined temperature-high pressure treatments predicted by the mathematical model applied in Response Surface Methodology. Using the "Box-Behnken" concept, the number of tests for a whole area of pressure-temperature-time-combinations (pressure variation: 50-400 MPa, temperature variation 20-80°C, time variation 1-60 min) could be limited to 15. In the center point of the model, the experimental combination was performed in triple to estimate the experimental variance. All the tests were executed in a randomized order to exclude the disturbing effect of environmental factors. Microbial analysis revealed for each microorganism an important reduction in total plate count, demonstrating a superior pressure resistance of the sporulating microorganisms in comparison with the most pressure resistant vegetative species Streptococcus faecalis. The effect of the medium composition could be neglected, showing little protective effect of, e.g. the fat fraction as seen in heat preservation techniques.
Authors:
F Moerman; B Mertens; L Demey; A Huyghebaert
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Meat science     Volume:  59     ISSN:  0309-1740     ISO Abbreviation:  Meat Sci.     Publication Date:  2001 Oct 
Date Detail:
Created Date:  2011-11-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101160862     Medline TA:  Meat Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  115-25     Citation Subset:  -    
Affiliation:
Department of Food Chemistry and Technology, University of Ghent, Coupure Links 653, B-9000 Ghent, Belgium.
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