Physiological state of reused brewing yeast

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In brewing, yeast may be reused many times. A number of yeast repitchings differs significantly among the breweries. Adjusting the number of times a strain may be serially repitched is of great importance for quality and consistency of final products. The fermentative and physiological characteristics of the yeast culture used in successive laboratory scale fermentations were determined. Yeast physiological state was assessed by the measurement of the levels of intracellular carbohydrates. In our investigation there were not any detectable changes in yeast capacity to ferment. No significant variation in the production of flavour compounds was found either. However, intracellular glycogen and trehalose contents were dependant on the yeast strain, generation number and wort gravity. Nevertheless, an alteration in the yeast physiological condition during serial repitchings occurred in a different mode than in previous studies confirming that the impact of serial repitchings is strain and medium dependent to a large extent. … full description

Bibliographic Details

Main Author

Edyta Kordialik-Bogacka

Other Authors

Anna Diowksz

Document Type

Articles

Physical Description

4 il.

Published in

Czech Journal of Food Sciences. -- ISSN 1212-1800. -- Roč. 31, č. 3 (2013), s. 264-269

Subjects

BREWERS' YEAST

Physiology

CARBOHYDRATE CONTENT

AROMATIC COMPOUNDS

GLYCOGEN

TREHALOSE

BREWING

pivovarské kvasnice

fyziologie

obsah glycidů

aromatické sloučeniny

glykogen

trehalóza

vaření piva

fyziologický stav > násadní kvasnice > sériové násady

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Item Description

Grafy

Bibliography

Bibliografie na s. 269 (13 zázn.)