Growth of Staphylococcus aureus as related to 17O NMR water mobility and water activity

Growth of Staphylococcus aureus as related to 17O NMR water mobility and water activity

17O NMR data were determined for three solute-BHI (Brain Heart Infusion) mixtures. For each solute, NaCl, raffinose and glycerol, NMR data (linewidths and signal intensity) were determined as well as water activity (a(w)), moisture contents, and effects on growth of Staphylococcus aureus in media of...

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Veröffentlicht in:Journal of food science 1997-07, Vol.62 (4), p.861-866
Hauptverfasser: Lavoie, J.P. (University of Massachusetts, Amherst, MA.), Labbe, R.G, Chinachoti, P
Format: Artikel
Sprache:eng
Schlagworte:
ACTIVIDAD DEL AGUA
ACTIVITE DE L'EAU
Bacteria
Biological and medical sciences
BIOLOGICAL CONTAMINATION
CONTAMINACION BIOLOGICA
CONTAMINATION BIOLOGIQUE
ESPECTROSCOPIA RMN
Food industries
Food microbiology
FOOD SAFETY
Food science
FORECASTING
Fundamental and applied biological sciences. Psychology
INNOCUITE DES PRODUITS ALIMENTAIRES
INOCUIDAD ALIMENTARIA
MICROBIAL CONTAMINATION
NMR
NMR SPECTROSCOPY
Nuclear magnetic resonance
SPECTROSCOPIE RMN
STAPHYLOCOCCUS AUREUS
TECHNIQUE DE PREVISION
TECNICAS DE PREDICCION
Water
WATER ACTIVITY
water mobility
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Zusammenfassung:17O NMR data were determined for three solute-BHI (Brain Heart Infusion) mixtures. For each solute, NaCl, raffinose and glycerol, NMR data (linewidths and signal intensity) were determined as well as water activity (a(w)), moisture contents, and effects on growth of Staphylococcus aureus in media of various moisture contents. Liquid (highly mobile) water content in all media tested was determined by NMR. This mobile water was important and had a stronger correlation with S. aureus growth rate than did a(w) or moisture content, although solute effects limited empirical prediction. NMR linewidth also correlated with lag phase
ISSN:0022-1147
1750-3841
DOI:10.1111/j.1365-2621.1997.tb15473.x