This is not what the OP was talking about, though. I do know about faking wood barrel ripening with wood flakes and I heard about "polverina", but the latter is

This is not what the OP was talking about, though. I do know about faking wood barrel ripening with wood flakes and I heard about "polverina", but the latter is, for what I know, something of the past (and the Ethanol scare in Italy played a large role in taking it out of the game, for what I know). In other words: "the plural of anecdote is not data" - I would like to get to the source and understand better the "flavored yeasts" claims. And also see what countries the article was talking about.