BIO Web of Conferences
Volume 3, 201437th World Congress of Vine and Wine and 12th General Assembly of the OIV (Part 1)
|Number of page(s)||4|
|Published online||04 November 2014|
Influence of freezing skin grapes to extract phenolic compounds during red wine maceration
1 Departement of Fruit Production and Enology, Faculty of Agronomy and Forestry Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile
2 Master International Vintage- École Supérieure d'Agriculture d'Angers, Angers, France
Wine quality depends on phenolic and aromatic compounds that are mainly located in skins and seeds of grapes and can be better extracted if suitable extraction technologies are applied. An increase in extractability has impact in the mouth feel, color and age ability of the wines. Using liquid or solid CO2 is a way to promote the breakdown of the cells membranes and enhance extraction of these compounds and protecting grapes and wine from oxidation. The main goal was to test the impact of solid CO2 addition to destemmed grapes with a new CO2 dispenser equipment in order to freeze the berry skins and improve the phenolic extraction in an economic and sustainable way in cv. Cabernet Sauvignon and Pinot Noir. The experiment designed for both cultivars was a treatment with CO2 addition and a control without CO2 addition each one with three replicates. Destemmed grapes submitted to carbonic snow reached temperature of the skins between − 1 and − 4 °C during four minutes under equipment treatment. The consumption of carbon dioxide was estimated around 0.3(kg ⋅kg−1)CO2 per berries. Wines of Cabernet Sauvignon and Pinot noir from fresh grapes and frozen grapes were made and were being compared in phenolic composition and sensory attributes.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.