Memorias de investigación
Research Publications in journals:
Sonication of Yeast Biomasses to Improve the Ageing on Lees Technique in Red Wines
Year:2019
Research Areas
  • Foodstuffs tecnology
Information
Abstract
Ageing on Lees (AOL) is a technique to improve the aromatic and gustatory complexity of wine, mainly by improving its body and reducing its astringency. However, the autolytic process is slow, resulting in high production costs. This work evaluated the effect of adding sonicated lees and combining it with oak chips, as a new technique to accelerate the AOL process and improve the aromatic quality of aged red wine. Cell disruption due to sonication was verified by optical microscopy. Volatile acidity, total polyphenol index, color intensity, tonality, dissolved oxygen, anthocyanins, and fermentative volatiles were monitored throughout the ageing of the wines. Sensory analysis was performed at the end of the ageing process. Polysaccharides released from the cell walls and the oxygen consumption, was quantified using a hydroalcoholic solution. The results indicated a 20% increase of the polysaccharide content and suggested an increase in the antioxidant capacity of the lees. No significant changes were observed in the fermentative volatile compounds and the total polyphenol index (TPI), except for those wines in contact with wood. The sonication of lees had some protective effect on the total anthocyanins content, however, color intensity was significantly lower in the sonicated treatments. The sonication of the lees did not cause any defect at the sensory level. Therefore, sonication could allow a reduction in the SO2 addition to wine, as well as a shortening of the ageing times. Keywords: ultrasound (US); sonicated lees; ageing on lees (AOL); polysaccharides; dissolved oxygen; phenolics; volatiles; oak wood chips; sensory profile
International
Si
JCR
Si
Title
Molecules
ISBN
1420-3049
Impact factor JCR
3,267
Impact info
Volume
24
10.3390/molecules24030635
Journal number
From page
635
To page
647
Month
SIN MES
Ranking
Participants
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Enología, Enotecnia y Biotecnología Enológica