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Related Experiment Videos

Potential Bacillus subtilis alpha-amylase-based time-temperature integrators to evaluate pasteurization processes.

A Van Loey1, M Hendrickx, L Ludikhuyze

  • 1Katholieke Universiteit te Leuven, Faculty of Agricultural and Applied Biological Sciences, Department of Food and Microbial Technology, Belgium.

Journal of Food Protection
|March 1, 1996
PubMed
Summary

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The thermal inactivation of Bacillus subtilis alpha-amylase (BSA) was studied to assess its potential as a time-temperature integrator. This enzyme activity monitoring system shows promise for pasteurization processes within specific temperature and z-value ranges.

Area of Science:

  • Enzyme kinetics
  • Food science
  • Thermal processing

Background:

  • Bacillus subtilis alpha-amylase (BSA) is a key enzyme in various industrial applications.
  • Understanding its thermal inactivation is crucial for process control and product safety.
  • Accurate monitoring of pasteurization requires reliable time-temperature integrators.

Purpose of the Study:

  • To investigate the thermal inactivation kinetics of BSA under various environmental conditions.
  • To evaluate the suitability of BSA as a biological indicator for time-temperature integration.
  • To determine the efficacy of BSA-based systems in the pasteurization temperature range.

Main Methods:

  • Isothermal experiments were conducted to study BSA inactivation.
  • Residual enzyme activity and heat of enzyme deterioration were measured as response properties.

Related Experiment Videos

  • A system utilizing BSA was compared against actual integrated processing values.

    • Main Results:

    • The study determined the thermal inactivation kinetics of BSA.
    • Residual enzyme activity and heat of deterioration provided reliable indicators.
    • The system demonstrated potential as a time-temperature integrator.

    Conclusions:

    • BSA exhibits predictable thermal inactivation kinetics.
    • BSA-based systems can function as effective time-temperature integrators.
    • These systems are suitable for pasteurization applications (70-100°C) with z-values of 6-12°C.