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Growth studies on the lactic streptococci: IV. Some observations on redox potential

Published online by Cambridge University Press:  01 June 2009

A. R. Keen
A. R. Keen
Affiliation:
New Zealand Dairy Research Institute, Palmerston North, New Zealand
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Summary

Redox potential changes at 30°C in anaerobic reconstituted skim-milk cultures of Streptococcus cremoris AM1 and AM2 and Streptococcus lactis ML8 have been investigated in batch cultures and continuous cultures maintained at constant pH by the addition of fresh medium. Str. lactis ML8 was more strongly reducing than either Str. cremoris AM1 or AM2. The positive Eh values which can arise in dense continuous cultures of lactic streptococci are not likely to affect either the lactic acid formation or proteolytic activity of the resultant bacterial concentrate. An electrolytic reduction cell is described which allows variations in redox potential in cultures to be controlled simply and effectively.

Type
Research Article
Information
Journal of Dairy Research , Volume 39 , Issue 1 , February 1972 , pp. 161 - 165
Copyright
Copyright © Proprietors of Journal of Dairy Research 1972

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References

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