Wessel du Toit | University of Stellenbosh – South Africa
High levels of dissolved oxygen in wine can lead to unwanted oxidation. Dissolved oxygen levels in wine are often reduced by sparging with an inert gas such as N2. However, the factors that influence the effectiveness of sparging and the effects it can have on the chemical composition of the wine were not well known prior to this study.
Winemaking factors such as gas flow rate, gas composition, wine temperature and bubble size were investigated on the efficiency of oxygen removal in wine.
Video excerpt from the presentation given during Enoforum Web Scientists (March 13, 2023)
This Premium content and all the Premium content published in the magazine can be consulted with the annual subscription to Infowine Premium for only 60 € ! (click here)
Wine is fundamentally a high-intervention product, and along all stages from harvest to bottling it's our job to guarantee safety and quality, but it's also up to us to research, experiment, and ad...
Producing a wine according to our oenological objective, wanting to express the variety, but adapting practices according to the sanitary status of the grapes, is continuous experimentation. We aga...
Phenolic composition of grapes has an important impact on the final intrinsic quality of (red) wines. Wine taste, mouthfeel and colour are driven principally by phenolic compounds present in grapes...
For the production of quality sparkling wines, it is important to ensure the separation of the correct phenolic profiles of must fractions. Find out how UV-Visible spectroscopy, together with chemo...
Chemical, biochemical and physiological factors influence the composition of the retronasal aroma during wine consumption, but not only tannins influence mouthfeel: anthocyanins do too. New methods...
What's the importance of varietal thiols, esters and glycerol content from an organoleptic quality point of view? How do volatile compounds evolve during wine aging and storage conditions? Are ther...
Cookies are pieces of information that are stored on your device that you can delete or block at any time. The information we collect allows us to improve the service we offer you. No data is disclosed to third parties.
Technical cookies are necessary for the functioning of the site and take into account your browsing preferences, such as language.
Technical cookies
Analytical cookies refer to systems for statistical analysis, in anonymous and aggregate form, relating to the running of the site and user behaviour.
Analytical cookies
Failure to accept the optional cookies will not eliminate the display of any advertisements. You can change your preferences at any time by clicking on the icon in the bottom right-hand corner.
VIDEO SEMINAR (Wessel DU TOIT, streaming 5 mins)
