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Messages - davejanssen

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Ask the Experts / Re: Ask the Experts: Mitch Steele on IPA
« on: October 22, 2012, 01:41:11 PM »
I'm pretty excited about this Q&A session. Thanks for organizing it. Here's my question:

I've read in a couple recent homebrewing books (The Brewer's Apprentice, the IPA excerpt in Zymurgy) that cohumulone is related to the harshness of bitterness, with more cohumolone seeming more harsh. However, I've also read in scientific papers that this is somewhat outdated and incorrect information and that cohumulone is no more bitter than other alpha acids, although it might be more soluble/survive to the finished product more than the others (Schonberger and Kostelecky's 2011 article in the Journal of the Institute of Brewing titled The Role of Hops in Brewing, see p. 262). Can you weigh in on this? Does cohumulone contribute a more harsh bitterness? Are there recent experiments confirming this?

Thank you. And thanks for all the information you've shared with the homebrewing community.

Dave

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