Microbiology of food preservation - Texas A&M University
Microbiology of food preservation - Texas A&M University
Microbiology of food preservation - Texas A&M University
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Freezing• Fast freezing– Lower temperature to -20°C within 30min– Blast freezing or immersion•Slow freezing• Lower temperature to -20╖C within3-72 h• Home freezersFreezing• Effects <strong>of</strong> freezing on microorganisms• Sudden mortality immediately onfreezing• Continued mortality rate decreasesgradually during storage• The lower the temperature the lowerthe bacterial declineRefrigeration• The lower the temperature thelower the growth rate• How can psychrotrophs grow atrefrigeration temperatures?
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