Hops

Question 1

Formula for Hop Utilization

Answer 1

hop utilization = (iso-alpha acids in wort x 100)/alpha acids added to the wort

Question 2

IBU

Answer 2

IBU = (quantity x alpha x utilization x 0.749)/beer volume

Question 3

List all 6 iso-alpha acids

Answer 3

Iso-alpha acids include:

cis-iso-humulone, trans-iso-humulone, cis-iso-cohumulone, trans-iso-cohumulone, cis-iso-adhumulone, trans-iso-adhumulone

Question 4

List alpha acids

Answer 4

humulone, cohumulone, and adhumulone

Question 5

Iso alpha acids vs alpha acids

Answer 5

Iso-alpha acids are more bitter and soluble in wort then alpha acids

Question 6

Cis and trans isomers

Answer 6

Ratio of cis isomers to trans isomers will be 32% to 68%, respectively, in a traditionally hopped beer.

Trans-isomers degrade significantly faster then cis-isomers.

Beer brewed with pre-isomerized extracts contain higher % of cis-isomers to trans-isomers, 85% cis-isomers

Extract efficiently is 55% compared to 30% with regularly hopped worts