Kinetics of Tomato Pectin Methylesterase Inactivation by Temperature and High Pressure

Nikolaos G. Stoforos, Simon Crelier, Marie‐Claude Robert, Petros Taoukis

Journal of Food Science · 2002 · 46 citations · 16 references

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Abstract

ABSTRACT: In this study we investigated the inactivation of endogenous pectin methylesterase (PME) in tomato juice during combined high‐hydrostatic pressure (ambient to 800 MPa) and moderate temperature (60 to 75 °C) treatments under isobaric and isothermal processing conditions. PME inactivation rates increased with increasing processing temperature, with the highest rate obtained during processing at 75 °C and ambient pressure. Inactivation rates were dramatically reduced as soon as processing pressure was raised. High inactivation rates were again attained when processing pressure exceeded a value of about 700 MPa. Such a behavior was described by considering two parallel mechanisms of inactivation, each one following first order kinetics with its own kinetic parameters.

References

16