Application of multi-pass high pressure homogenization under variable temperature regimes to induce autolysis of wine yeasts.
The effects of the number of passes and processing temperature management (controlled vs. uncontrolled) were investigated during high pressure homogenization-induced autolysis of Saccharomyces bayanus wine yeasts, treated at 150MPa. Both variables were able to affect cell viability, and the release of soluble molecules (free amino acids, proteins and glucidic colloids), but the effect of temperature was more important. S. bayanus cells were completely inactivated in 10 passes without temperature control (corresponding to a processing temperature of 75°C). The two processing variables also affected the volatile composition of the autolysates produced: higher temperatures led to a lower concentration of volatile compounds. The management of the operating conditions may allow the compositional characteristics of the products to be modulated, making them suitable for different winemaking applications.
Università degli Studi di Udine, Dipartimento di Scienze Agroalimentari, Ambientali ed Animali, via Sondrio 2/A, 33100 Udine, Italy. Electronic address: piergiorgio.comuzzo@uniud.it.
Piergiorgio
P
Comuzzo
Università degli Studi di Udine, Dipartimento di Scienze Agroalimentari, Ambientali ed Animali, via Sondrio 2/A, 33100 Udine, Italy.
Sonia
S
Calligaris
Università degli Studi di Udine, Dipartimento di Scienze Agroalimentari, Ambientali ed Animali, via Sondrio 2/A, 33100 Udine, Italy.
Lucilla
L
Iacumin
Università degli Studi di Udine, Dipartimento di Scienze Agroalimentari, Ambientali ed Animali, via Sondrio 2/A, 33100 Udine, Italy.
Federica
F
Ginaldi
Università degli Studi di Udine, Dipartimento di Scienze Agroalimentari, Ambientali ed Animali, via Sondrio 2/A, 33100 Udine, Italy.
Sabrina
S
Voce
Università degli Studi di Udine, Dipartimento di Scienze Agroalimentari, Ambientali ed Animali, via Sondrio 2/A, 33100 Udine, Italy.
Roberto
R
Zironi
D000596:Amino Acids / Q000378:metabolism; D001329:Autolysis; D005285:Fermentation / Q000502:physiology*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006358:Hot Temperature; D011312:Pressure; D012440:Saccharomyces / Q000378:metabolism*; D014920:Wine / Q000032:analysis*
D000596:Amino Acids
Autolysis; High pressure homogenization; Inactive dry yeasts; Saccharomyces; Wine