Spectrophotometric method for exploring 3-methyl-2-butene-1-thiol (MBT) formation in lager |
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Authors: | Pozdrik Richard Roddick Felicity A Rogers Peter J Nguyen Thang |
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Institution: | School of Civil and Chemical Engineering, RMIT University, P.O. Box 2476V, Melbourne 3001, Australia. |
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Abstract: | The disappearance of riboflavin absorbance at 445 nm from beers or model beers on light exposure is directly linked to light-struck character formation. The addition of (+)-catechin, (-)-epicatechin, tryptophol, or ascorbic acid was able to reduce, but not stop, absorbance loss or light-struck character formation in either model beer or mainstream lager that was exposed to light. When isohumulone was present in model beer, the inhibitory effect of (+)-catechin, (-)-epicatechin, or tryptophol decreased with increasing isohumulone. The spectrophotometric method used in this study is a simple and effective method for determining light-struck susceptibility. |
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