Document Detail

Release of deuterated nonenal during beer aging from labeled precursors synthesized in the boiling kettle.
MedLine Citation:
PMID:  10552809     Owner:  NLM     Status:  MEDLINE    
The use of labeled nonenal enabled the demonstration that the appearance of the cardboard flavor in finished beer comes from lipid auto-oxidation during wort boiling and not from lipoxygenasic activity during mashing. Free trans-2-nonenal produced by linoleic acid auto-oxidation in the kettle disappears, owing to retention by wort amino acids and proteins. This binding linkage protects trans-2-nonenal from yeast reduction but is reversible, allowing release of the compound at lower pH during aging. Labeled trans-2-nonenal is detected after aging when deuterated precursors form in the boiling kettle. The amount of alkenal released correlates with the concentration of reversible associations in the pitching wort. This work brings new illumination to the formation of trans-2-nonenal and overturns many previous hypotheses. It also explains why a reduction in the beer pH intensifies the cardboard flavor.
S Noël; C Liégeois; G Lermusieau; E Bodart; C Badot; S Collin
Related Documents :
6546999 - Demonstration of a neuropeptide y-like immunoreactivity in human phaeochromocytoma extr...
7593029 - In vitro biocompatibility, mechanical properties, and corrosion resistance of ti-zr-nb-...
12149179 - Immunonutrition: fact, fantasy, and future.
14381439 - Thymine in the acid-soluble fraction of arbacia eggs.
24309099 - Scd1 mammary-specific vector constructed and overexpressed in goat fibroblast cells res...
14044949 - Nucleotide composition of ribonucleic acid from neurospora crassa.
25037369 - Chemical characterisation and analysis of the cell wall polysaccharides of duckweed (le...
16533019 - Structures and biological properties of dna adducts derived from n-nitroso bile acid co...
7406889 - Dietary regulation of mammary lipogenesis in lactating rats.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  47     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  1999 Oct 
Date Detail:
Created Date:  2000-02-11     Completed Date:  2000-02-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  4323-6     Citation Subset:  IM    
Unité de Brasserie et des Industries Alimentaires, Université Catholique de Louvain, Place Croix du Sud 2/Bte 7, B-1348 Louvain-la-Neuve, Belgium.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Aldehydes / analysis*
Beer / analysis*
Deuterium / analysis
Food Preservation*
Hot Temperature
Reg. No./Substance:
0/Aldehydes; 2463-53-8/2-nonenal; 7782-39-0/Deuterium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Using electronic odor sensors to discriminate among oak barrel toasting levels.
Next Document:  Identification of some volatile descriptors of the rock-rose-like aroma of fortified red wines from ...