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Yeast quality assessment, management and culture maintenance1

G.G. Stewart     GGStewart Associates, Cardiff, Wales, UK     The International Centre for Brewing & Distilling, Heriot-Watt University, Edinburgh, Scotland, UK

Abstract

Efficient yeast management between brewing fermentations is critical in order to maintain a pitching yeast in good condition—viability and vitality. Unless appropriate procedures are in place, initial beer quality, long-term stability and drinkability will be jeopardized.

The yeast species should be identified—ale or lager. The appropriate production strain must be maintained in accepted culture collection conditions and then resuscitated and propagated aerobically. After yeast cropping, following wort fermentation, the ...

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