Abstract
Sparkling winemaking is an increasing industry in Castilla y Leon region of Spain. Several trials have been made to improve the techniques in order to offer better products to the market. This study focuses on the evaluation of the influence of different co-adjuvants in the sparkling winemaking process (β-glucanases, autolysated yeasts, yeasts cell walls and purified mannoproteins) by measuring different oenological parameters at 3, 6 and 9 months of ageing after the secondary fermentation. Both physicochemical and sensorial analyses are considered in order to reveal the incidence of these co-adjuvants in the final product. A consumers study has also been carried out with the aim of knowing the possible impact of the co-adjuvants in the market of the so elaborated sparkling wines. β-Glucanases seem to increase the ageing characteristics of the sparkling wines, while yeast derivatives (yeast cell walls and yeast autolysates) improve their fruity and flowery character.
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