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.
When yeast ferments beer, it produces more than 500 different compounds. Many of these compounds give beer its characteristic flavor and aroma. One of these compounds — one that is usually considered
Hydrometers are simple devices that rely on a precise weight to measure the density of the solution it’s floating it. In a solution of pure (distilled) water, weight in a brewer’s hydrometer allows
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