Article (Scientific journals)
Occurrence of polyfunctional thiols in sorghum beer "ikigage" made with Vernonia amygdalina "umubirizi"
Lyumugabe Loshima, François
2012In Flavour and Fragrance Journal, 27 (5), p. 372-377
Peer Reviewed verified by ORBi
 

Files


Full Text
OCCURENCE OF THIOLS IN IKIGAGE.pdf
Author postprint (201.44 kB)
Download
Annexes
OCCURENCE OF THIOLS IN IKIGAGE.pdf
Publisher postprint (201.44 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Polyfunctional thiols; aroma; sorghum beer; ikigage; vernonia amygdalina
Abstract :
[en] Several polyfunctional thiols have been previously identified in beers made from barley and hops. These compounds have not been investigated in beers brewed with non-Western raw materials. Here we have performed a thiol-specific extraction with p-hydroxymercuribenzoic acid on a traditional ikigage sorghum beer from Rwandese peasants (use of Vernonia amygdalina just for yeast propagation), and on two pilot beers with addition (or not) of V. amygdalina in the boiling kettle, instead of hops. Gas chromatography – olfactometry, gas chromatography –mass spectrometry and gas chromatography with pulsed flame photometric detectionanalyses of the extracts enabledustoidentify 14polyfunctional thiols.The well-known ho pconstituent3-methyl-2-buten-1-thiol emerged as a key flavour in the unhopped beers containing V. amygdalina flavour dilution >262 144). The addition of V. amygdalina during boiling also resulted in the presence of 1-butanethiol, but the production of 2-sulfanylethanol and 2-sulfanylethyl acetate was inhibited. Complementary data are required to understand how V. amygdalina leaves are able to impact upon the Ehrlich pathway leading to cysteine and homocysteine-derived thiols.
Disciplines :
Biotechnology
Author, co-author :
Lyumugabe Loshima, François ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol.
Language :
English
Title :
Occurrence of polyfunctional thiols in sorghum beer "ikigage" made with Vernonia amygdalina "umubirizi"
Publication date :
27 July 2012
Journal title :
Flavour and Fragrance Journal
ISSN :
0882-5734
eISSN :
1099-1026
Publisher :
Wiley Online Library
Volume :
27
Issue :
5
Pages :
372-377
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Article publié en collaboration avec l'unité de brasserie de l'université catholique de Louvain
Available on ORBi :
since 19 April 2013

Statistics


Number of views
59 (7 by ULiège)
Number of downloads
164 (0 by ULiège)

Scopus citations®
 
6
Scopus citations®
without self-citations
5
OpenCitations
 
5

Bibliography


Similar publications



Contact ORBi