The value of, opportunities provided by, and the difficulties in elucidating the exact contribution that chemical compounds make to wine aroma and flavour are outlined and highlighted in this review. This paper provides an overview of the current understanding of relationships between wine sensory properties and volatile chemical composition through a discussion of recent studies where accurate, precise chemical data have been obtained for compounds shown by quantitative gas chromatography-olfactometry (GC/O) to be odour active in a sample. A centrepiece of this discussion is a compilation of compounds indicated to be most important to wine aroma. This is followed by a consideration of the limitation of odour activity values obtained by GC/O with particular reference to wine esters and volatile thiol compounds. The strengths of sensory descriptive analysis and its associated statistical methodologies to complement chemical composition data for aroma compounds are also explored. Grape flavour precursor compounds and the development of methods for their rapid quantification are then discussed in the context of the role of precursors contributing to wine aroma. Finally, an assessment is given of the likelihood in the near future of developing analytical strategies to measure wine flavour in relation to consumer expectations on the one hand, and on the other, to viticultural management practices to influence grape flavour composition. We recommend that you consult the full text of this article, which was published in the Australian Journal of Grape and Wine Research Volume 11, Number 2, 2005 pages 114-126.
The seasonal character of harvests limits winemaking considerably, especially oenological research. Thus, conserving sterile musts during the whole year to carry out experiments is certainly a very...
JL Aleixandre-Tudo et al., University of Stellenbosch (South Africa)
Phenolic compounds are responsible for the main quality attributes of red wines, and phenolic analysis is still time consuming and difficult to perform for most of the wineries
Francesca Borghini and Stefano Ferrari; ISVEA srl, Siena (Italy)
Within the framework of the Submeasure 16.2 of the Rural Development Plan of the Region of Tuscany-European Innovation Partnership, the Vintegro project has focused, for over two years, on the stud...
This study aims at exploiting an undervalued winemaking by-product, wine yeast lees, by developing efficient and food-grade methods for the extraction of yeast glycoproteins. These extracts were th...
Quercetin belongs to the class of polyphenols, flavonoids in particular. The most abundant in wine are quercetin, myricetin, kaempferol and isoramnetin, which come from the glycosidic forms found i...
Jose Luis Aleixandre-Tudo, University of Stellenbosch (South Africa)
Phenolic compounds are responsible for the main quality attributes of red wines, and phenolic analysis is still time consuming and difficult to perform for most of the wineries
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