| abstract |
In the beer fermentation process, Pichia spp. yeast strains can be combined with normal beer yeast strains and with different hop varieties to produce synergistic effects, including the increased production in the fermentation product of esters, e.g., increased levels of isoamyl acetate, isobutyl acetate, ethyl propionate, ethyl valerate, ethyl butyrate, ethyl decanoate, and ethyl octanoate. Additionally, the Pichia spp. strain interacts differently with different hop varieties, such that the flavor profile of beer can be tuned by employing different combinations of Pichia spp. strains and hops. |