The Boreal Brewers club puts on between one to three tastings a year, open to the public. We also participate in a number of fundraisers every year, donating beer to non-profit silent auctions, and serving beer at certain fundraisers.
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Modern breathalyzers work on a clever electrochemical principle. The subject's breath is passed over a platinum electrode, which causes the alcohol to bind with oxygen, forming acetic acid. In the process it loses two electrons, a process that sets up a current in a wire connected to the electrode (the higher the concentration of alcohol in the breath, the greater the electrical current, which can be read by a simple meter to indicate intoxication levels).