Project title
Investigation of the formation of polymeric phenols and pigments in Pinotage wine during bottle aging and the subsequent influence on the mouth-feel properties.

Project leader
Oberholster, A

Institution
University of Stellenbosch. Department of Viticulture and Enology.

Team members
Du Toit, W
Buica, A
Lawrence, N

Project description
The composition of polymeric phenols/pigments formed in red wine is relatively unknown. Although the polymeric pigments have been isolated from red wines of different cultivars (Cabernet Sauvignon, Shiraz and Pinot noir) and ages (fermentation to 5 years old), the development of polymeric pigments during aging in a wine has not been followed. The aim of this project would be to characterise and identify the polymeric pigment composition and polymerisation reactions of red wines with aging and the effect thereof on the mouth-feel properties of the wine, as well as the effect of fining and filtration on these characteristics.

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