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Thermal inactivation kinetics of acid phosphatase (ACP) in cod (Gadus morhua)
Johnsen, S.O.; Skipnes, D.; Skåra, T.; Hendrickx, M.E. (2007). Thermal inactivation kinetics of acid phosphatase (ACP) in cod (Gadus morhua). Eur. Food Res. Technol. 224(3): 315-320. https://dx.doi.org/10.1007/s00217-006-0433-7
In: European Food Research and Technology. Springer-Verlag: Heidelberg; Berlin. ISSN 1438-2377; e-ISSN 1438-2385, meer
Peer reviewed article  

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Trefwoorden
    Gadus morhua Linnaeus, 1758 [WoRMS]; Pisces [WoRMS]
    Marien/Kust
Author keywords
    acid phosphatase; thermal inactivation; kinetics; z-value; cod; fish

Auteurs  Top 
  • Johnsen, S.O.
  • Skipnes, D.
  • Skåra, T., meer
  • Hendrickx, M.E., meer

Abstract
    Thermal inactivation of acid phosphatase (ACP) in muscle extracts of farmed cod was measured in the range of 55–67.5 °C obtaining D60=6.78±0.10 min and z=6.37±0.09 °C. These data show that ACP is less thermo-stable than heat-resistant pathogen micro-organisms (e.g. Listeria monocytogenes) and therefore could be inactivated in heat-preserved fish products. As a consequence, residual ACP activity is not recommended as a quantitative intrinsic time temperature indicator (TTI) relative to pathogenic micro-organisms, based on these preliminary studies. Hence, ACP residual activity is probably not a shelf life limiting factor of cod products but might have its potential as an indirect monitor of quality parameters during thermal processing.

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