February 2009 Issue of Wines & Vines

New Methods to Limit Urea

Genetically enhanced yeasts reduce probable carcinogen

by Tim Patterson
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The issues of urea and ethyl carbamate have been hovering over the wine industry like a little cloud for several years now. Urea, a minor byproduct of yeast metabolism, can combine with ethanol to form urethane--also known as ethyl carbamate or EC--a known carcin…

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