Inactivation ofEscherichia coliin milk by high pressure processing at low and subzero temperatures

Autor:	Sami Bulut
Rok vydání:	2014
Předmět:	Strain atcc Pascalization Chromatography Chemistry medicine Condensed Matter Physics medicine.disease_cause Escherichia coli
Zdroj:	High Pressure Research. 34:439-446
ISSN:	1477-2299 0895-7959
DOI:	10.1080/08957959.2014.981262
Popis:	Inactivation of Escherichia coli strain ATCC 25922 in frozen and unfrozen milk by high pressure processing at low or subzero temperatures was investigated. Frozen (−21 °C) and unfrozen (3 °C) milk samples were exposed to a pressure of 300 MPa for 0.5–15 min at varying temperatures between −5 °C and 5 °C. Reduction in the number of E. coli in unfrozen milk was enhanced by pressure treatment at subzero temperatures, whereas no survival was detected in frozen milk samples after a 10 min pressure treatment at −3 °C, corresponding to a minimum of 6.8 log cycle reduction in the number of E. coli. A substantial reduction of 3.8 log reduction in number of E. coli was observed after a 30 s pressure treatment at −3 °C. Results suggested that the mechanical forces could play a role in enhanced inactivation of E. coli in frozen milk samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2feff9333065c256d83799644781ddcc https://doi.org/10.1080/08957959.2014.981262 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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