Related Experiment Video
Updated: Mar 22, 2026

Optimization of Processing of Tiebangchui with Highland Barley Wine Based on the Box-Behnken Design Combined with the Entropy Method
Published on: May 19, 2023
Impact of flavouring substances on the aggregation behaviour of dissolved barley β-glucans in a model beer
M Kupetz1, B Sacher1, T Becker1
1Lehrstuhl für Brau- und Getränketechnologie, Technische Universität München, Weihenstephan, Weihenstephaner Steig 20, 85354 Freising, Germany.
Abstract:
Structural polymers such as cereal β-glucan may cause various processing problems in beverage industry depending on concentration, molar size distribution and agglomeration behaviour. In this context, influences of the beer volatiles dodecanoic acid, octyl butanoate, ethyl decanoate and decyl acetate on molar mass and radii of barley β-glucan were investigated in ethanolic (4% w/w) model solution. After addition of 100mg/l ethyl decanoate and decyl acetate to the β-glucan solution, a wider-ranging molar mass distribution could be observed by means of asymmetric field-flow-fractionation. Due to agglomeration, average molar mass of β-glucan standard (MW=6.8×10(6)g/mol) increased by 2×10(6)g/mol (P<0.05) in solution containing decyl acetate. Furthermore, a significant growth (P<0.05) from 86 to 102 nm in gyration radius was measured. The obtained results elucidate the importance of fatty acid derived flavouring substance composition in beer regarding the aggregation behaviour of β-glucan.
Related Concept Videos
Microbes in Beverage Production
Microbes in Food Production
Microbes in the Production of Fermented Foods
Colloids

