Video
Yeast is everywhere, on plants, on fruit, in the air…and in beer. Streaking an agar plate is a quick and easy way to isolate yeast, to check for purity, and to re-culture yeast from sources like a bottle-conditioned beer or your own fermenter. A sterile inoculation loop is dipped into a sample of yeast and streaked over the agar surface on a plate in a pattern of decreasing cells. The last cells to rub off the loop are wide-enough apart so that they grow into isolated colonies. It’s easier than it sounds and Brew Your Own Magazine’s Technical Editor Ashton Lewis walks you through how to streak a yeast source on an agar plate to isolate colonies to possibly use in your next batch of beer.
The word “biotransformation” has gotten a lot of buzz as brewers look to fermentation — and specifically, yeast — to transform the aroma of hops. Learn from Brew Your Own Magazine’s Technical
Learn how to start with a single colony of yeast stored on a plate or slant and build it up to a pitchable quality to add to your wort for your beer
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