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ViaStain™ CFDA-AM Yeast Vitality Stain

CSK-0125-200uL

The ViaStain™ CFDA-AM Yeast Vitality Kit enables the user to quantitatively distinguish metabolically active Lager and Ale yeast in pure cultures and in cultures containing debris such as beer slurries using the Cellometer system. The stain contains a solution of a cell-permeant esterase substrate, CFDA-AM (5-Carboxyfluorescein Diacetate, Acetoxymethyl Ester), that fluoresces green when hydrolyzed by enzymatically active Lager and Ale yeast. The percent of yeasts that are actively fermenting during production can be determined and used to optimize the fermentation process during beer brewing, for example. 

Learn more about Yeast Viability and Vitality Reagents

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