Photooxidative degradation of beer bittering principles: product analysis with respect to lightstruck flavour formation

Photochemical & Photobiological Sciences Pub Date: 2004-06-17 DOI: 10.1039/B403666B

Abstract

Isohumulones, the main bittering agents in beer, are decomposed by light-induced reactions, thereby leading to radical precursors on the pathway to lightstruck flavour formation. Excited flavins, formed on visible-light irradiation, readily interact with isohumulones, as well as with reduced and oxidized derivatives thereof. From identification of both volatile and non-volatile reaction products thus formed, feasible degradation mechanisms are proposed.

Graphical abstract: Photooxidative degradation of beer bittering principles: product analysis with respect to lightstruck flavour formation
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