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Results for “phenolic levels”
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Seeds and red wine phenolics (Part 2): Influence of seed number on phenolic levels in red wines
This study set out to explore how different seed levels influence the phenolic composition of Merlot and Shiraz wines.
By Wessel du Toit, Asiphe Makalisa & José Luis Aleixandre-Tudo · 7 min read
Seeds and red wine phenolics (Part 1): Influence of seed number on phenolic levels in different grape varieties
In this study, three extraction methods were evaluated to assess phenolic compounds in red grapes with differing seed levels. These methods included the Glories method, the Iland method, and the recently developed hand-crushed method.
By Wessel du Toit, Asiphe Makalisa & José Luis Aleixandre-Tudo · 6 min read
Sparkling wine (Part 3): Phenolic composition of traditional style sparkling wine
PHOTO: Anthony Delanoix (Unsplash).
By Mpho Mafata, Astrid Buica, Wessel du Toit and Francois van Jaarsveld · 3 min read
Flexcube: The new cooperage
Flexcube oxygen-permeable maturation vessels, known as New Generation Barrels, are now widely used across all major wine-producing markets where they co-exist with traditional oak barrels.
By Wanda Augustyn · 6 min read
Wine enzymes – expand your knowledge
One of the goals of this article is to try to provide winemaking professionals with a basis to make educated choices when selecting enzymes. We try to establish
By Danie Malherbe and Céline Fauveau Schaff · 10 min read
Resolutions adopted by OIV
The 14th General Assembly of the International Organisation of Vine and Wine (OIV), which met on 28 October 2016 in Bento Gonçalves (Brazil), adopted a total of
By OIV · 7 min read
Analytical methods to measure grape metabolites - a review
This review presents a summary of the chromatographic methods that have been developed and optimised to accurately profile and quantify grape metabolites. The g
By Hans André Eyéghé-Bickong, Philip Young and Melané Vivier · 10 min read
The role of metals in the quality and shelf-life of white wine
PICTURE: Shutterstock.
By Francois van Jaarsveld and Francois October · 6 min read
New Winetech projects for 2017 (Part 1)
1. Modelling colour stability and ageing potential in SA red wines
By Winetech Editorial Team · 4 min read
Understanding and measuring tannins in red wines
The importance of phenolic compounds on wine quality require methods that accurately measure the tannin content.
By Jose Luis Aleixandre-Tudo, Mihaela Minhea and Wessel du Toit · 9 min read
Shiraz wines made from vines with different training systems
PHOTO: Wosa Library.
By Wessel du Toit, Petri de Beer and Albert Strever · 4 min read
