Search results for " non-Saccharomyces"
showing 5 items of 5 documents
Isolation, identification and oenological characterization of non-Saccharomyces yeasts in a Mediterranean island
2016
UNLABELLED We isolated, identified and characterized yeast strains from grapes, and their fermented musts, sampled in the small island of Linosa, where there are no wineries and therefore the possibility of territory contamination by industrial strains is minimal. By traditional culture-dependent methods, we isolated 3805 colonies, distinguished by molecular methods in 17 different species. Five hundred and forty-four isolates were analysed for the main oenological characteristics such as fermentative vigour with and without sulphites, sugar consumption and production of alcohol, volatile acidity, hydrogen sulphide, glycerol and β-glucosidase. This analysis identified Kluyveromyces marxianu…
Candida zemplinina for Production of Wines with Less Alcohol and More Glycerol
2016
We developed a new protocol for winery mixed fermentations, using the selected Candida zemplinina yeast strain Cz3. The results of a two-year study, in which red musts (Merlot in 2010; Merlot, Nero d’Avola and Frappato in 2011) were inoculated with Cz3, is discussed. These wines were compared with wines obtained by inoculation with commercial Saccharomyces cerevisiae yeast strains (NDA21 and AR06 in 2010; NDA21 in 2011), or with those obtained by spontaneous fermentation (only in 2011). The inoculation of Cz3 always resulted in a two-phase fermentation: the first phase was driven by the C. zemplinina strain, while the second was dominated by the indigenous S. cerevisiae yeasts coming from t…
Origines des levures Saccharomyces et non-Saccharomyces présentes dans le moût : Vignoble ou cuverie ?
2017
International audience; Les levures de l’espèce Saccharomyces cerevisiae ont longtemps été considérées comme les seules responsables du processus de fermentation. On sait aujourd’hui que différentes espèces de levures Saccharomyces et non-Saccharomyces (NS) sont présentes dans les moûts et qu’un certain nombre d’entre elles participe à la fermentation alcoolique (FA). Bien qu’il soit aujourd’hui largement admis que les principales sources de levures dans le moût de raisin sont les baies de raisin et le matériel de vinification (Fleet et Heard, 1993 ; Mortimer et Polsinelli, 1999) (figure 1), la part apportée par chacune de ces deux sources est encore mal définie. De plus, d’autres sources p…
Ricerca di lieviti autoctoni per migliorare il profilo aromatico delle birre artigianali
2019
In corso d’opera un’analisi di matrici appartenenti a diverse nicchie ecologiche con l’obiettivo di individuare lieviti dalle caratteristiche tecnologiche e qualitative ottimali
Microbial resources and sparkling wine differentiation : state of the arts
2022
Consumers’ increasing interest in sparkling wine has enhanced the global market’s demand. The pro-technological yeasts strains selected for the formulation of microbial starter cultures are a fundamental parameter for exalting the quality and safety of the final product. Nowadays, the management of the employed microbial resource is highly requested by stakeholders, because of the increasing economic importance of this oenological sector. Here, we report an overview of the production processes of sparkling wine and the main characterisation criteria to select Saccharomyces and non-Saccharomyces strains appropriate for the preparation of commercial starter cultures dedicated to the primary a…