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Investigations of the effects of ultrasound on thiol precursors of grapes

Tomas Roman, Fondazione Edmund Mach

Investigations of the effects of ultrasound on thiol precursors of grapes

High amplitude and power ultrasounds (US) were tested on the pre-fermention maceration phase of white grapes to study the effect on thiol precursors. In particular, the research focused on the precursors of 3-mercaptohexan-1-ol (3MH) and 4-mercapto-4-methyl-pentan-2-one (4MMP) linked to glutathione (GSH) and cysteine (Cys).

All the experiences highlight the interesting effect of US treatment on thiol precursors; from a technological point of view, US could be advantageously used in the management of the pre-fermentation maceration phase of aromatic varieties containing thiol precursors. The results of this and previous research make it reasonable that pre-fermentation maceration of white grapes could be replaced by a short treatment of the crushed grapes.

Report presented at the Enoforum Awards 2020. The paper reproduced in this video-seminar was presented at the 1st Spanish edition of Enforum Web (5-7 May 2020)

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Published on 10/22/2020
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