Assertion: perceived bitterness | /r/CapableOf | increase about 2 ibus
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text: The research concluded that perceived bitterness increases about 2 IBUs for every 0.1 tick up in pH. Hopsteiner researchers found a similar relationship between dry hopping and pH; an addition of a pound of hops per barrel will add 0.14 to pH (or 2–3 IBUs).