Microstructural effects on microbial survival: phase-separating dextran solutions
Evolving microstructure in a model dextran solution is shown to exert a major influence on the survival of Escherichia coli K-12 frag 1 and Salmonella typhimurium LT2. The microstructure results from microscopic phase separation, which develops over several hours resulting in hardening of the soluti...
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Veröffentlicht in: | International journal of food microbiology 2001-09, Vol.68 (3), p.187-197 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | Evolving microstructure in a model dextran solution is shown to exert a major influence on the survival of
Escherichia coli K-12 frag 1 and
Salmonella typhimurium LT2. The microstructure results from microscopic phase separation, which develops over several hours resulting in hardening of the solution into a glassy state. The microstructure is characterized by an array of physical methods including image analysis, electron spin resonance and bulk rheology, and it is shown that bacterial survival depends on the formation of microscopic, water-rich domains and not primarily on bulk water activity or hardness. |
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ISSN: | 0168-1605 1879-3460 |
DOI: | 10.1016/S0168-1605(01)00490-1 |