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Automatic method to quantify starter activity based on pH measurement

Published online by Cambridge University Press:  01 June 2009

Henry E. Spinnler and
Georges Corrieu
Henry E. Spinnler
Affiliation:
Laboratoire de Génie des Procédés Biotechnologiques Agro-Alimentaires, Institut National de la Recherche Agronomique, 78850 Thiverval-Grignon, France
Georges Corrieu
Affiliation:
Laboratoire de Génie des Procédés Biotechnologiques Agro-Alimentaires, Institut National de la Recherche Agronomique, 78850 Thiverval-Grignon, France
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Summary

A new method for measuring the activity of mesophilic and thermophilic lactic acid bacteria is proposed based on measuring the pH of cultures at extremely short intervals (30–90 s) during growth and calculating several kinetic parameters, i.e. the maximum acidification rate (Vm), the time and pH at which Vm occurred, the time or pH range during which the observed rates were greater than Vm/2. These were easily calculated by coupling the pH meter to a microcomputer.

Information

Type
Original articles
Information
Journal of Dairy Research , Volume 56 , Issue 5 , November 1989, pp. 755 - 764
Copyright
Copyright © Proprietors of Journal of Dairy Research 1989

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References

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