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Fermentation & Microbiology

$Ultrasound potential, freezing-thawing of grapes and the use of UV-VIS spectroscopy in the fractionation of the must$
Ultrasound potential, freezing-thawing of grapes and the use of UV-VIS spectroscopy in the fractionation of the must
Andrea Natolino, University of Udine; Robert Dambergs, Charles Sturt University; Laura Rustioni, University of Salento
Presentations of three works from the Enoforum Web Conference 2021
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Published on: 05/22/2021
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Effect of different levels of oxygenation on phenolic and volatile compounds of Nebbiolo wine during bottle storage
M. Petrozziello, F. Torchio, F. Piano, S. Giacosa, M. Ugliano, A. Bosso, L. Rolle, CREA-Asti, Università degli Studi di Torino, Università di Verona
Given the economic and qualitative importance of Nebbiolo-based wines, this research sought to explore the effect of increasing oxygen doses on four wines made from Nebbiolo grapes hand-picked in B...
Published on: 10/07/2020
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Enological approaches for the limitation of the cell wall polysaccharides-tannin interactions
Encarna Gomez-Plaza, Departamento de Tecnología de Alimentos, Nutrición y Bromatología, Universidad de Murcia.
Tannins are mainly present in grape skin and seeds and are transferred into must-wine during the maceration step of winemaking, but this transference is far for being complete. This could be due, a...
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Published on: 09/22/2020
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Malolactic fermentation: knowledge versus practice
Maret Du Toit, Stellenbosch University - Elda Lerm, Anchor Yeast
The knowledge, objectives and management of malolactic fermentation (MLF) have evolved greatly in recent years. Until very recently, Oenococus oeni was the main microorganism responsible and its only
Published on: 07/23/2020
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Native Saccharomyces cerevisiae strains tailored for organic Verdicchio wine production
Alice Agarbati et al. Università Politecnica delle Marche, Italy
The native Saccharomyces cerevisiae DiSVA 151 strain (Dep. of Life and Environmental Sciences, Polytechnic University of Marche, Italy) isolated from Verdicchio grapes and selected for its oenologi...
Published on: 07/20/2020
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Influence of the electrochemical potential in oenology
Federico Casassa, California Polytechnic State University; Marcia Torres, Matanza Creek Winery
EnoforumWeb videos: The measurement of RedOx potential in winemaking has an influence on a large number of chemical reactions and therefore has a great impact on the final quality of the wine.
Published on: 07/07/2020
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Considerations on the use of Torulaspora delbrueckii for winemaking
Rocío Velázquez and Manuel Ramírez; Univ. degli Studi di Padova, Italy – Univ. de Extremadura, Spain.
Torulaspora delbrueckii is probably the most suitable non-Saccharomyces yeast for winemaking. This is because it has a good fermentation performance compared to other non-Saccharomyces yeasts that ...
Published on: 06/30/2020
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Genetic improvement to reduce the sulphurous production of a homothallic wine yeast using a simple hybridization method
Rocío Velázquez, Paolo Antoniali, Alberto Martínez and Manuel Ramírez; Univ. di Padova, Italy, Italiana Biotecnologie SRL, Univ. de Extremadura, Spain
Despite the intensive use of selected wine yeasts, there is still a margin for technological improvement. Previous studies on yeast genetics have shown that many of their characters, which determin...
Published on: 05/27/2020
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Uncovering of a domesticated yeast starter culture during the spontaneous fermentation of withered grapes
R. L. Binati, et al. Department of Biotechnology, University of Verona, Italy
The interest for the conservation and improvement of traditional spontaneous fermentations is rising among wine producers, to reduce the spoilage risks associated with this approach, and ultimately...
Published on: 03/02/2020
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Protective effect of vegetal extracts against acidic and alcoholic stress in wine yeasts
A. Caridi, Wafa Talbi, R. Sidari, A. De Bruno, M. Poiana and S. Fattouch; University of Reggio Calabria, Italy, University of Carthage, Tunisia
Protective agents may minimize osmotic and thermal stresses in wine yeasts. In the present work, the tolerance of ten strains of Saccharomyces cerevisiae - two wild types and eight descendants - ag...
Published on: 02/18/2020
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Use of Ultra-High Pressure Homogenization to control microbial populations in grape musts
Antonio Morata, ETSIAAB, Universidad Politécnica de Madrid, Spain
Winner of the SIVE OENOPPIA Awards 2019: UHPH treatment led to the total elimination of grape microorganisms considering an initial population of 6-log CFU/mL of wild yeasts and fungi, and approxim...
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Published on: 09/19/2019
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Varietal thiol management during the winemaking process
Remi Schneider, Oenobrands Product & Application Manager
VIDEO SEMINAR ENOFORUM 2018: The varietal thiols (4-mercapto-4-methylpentan-2-one (4MMP), 3-mercaptohexan-1-ol (3MH) and 3-mercaptohexylacetate (A3MH) are key odorants of wine. They are released du...
Published on: 06/12/2019
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The influence of mitochondrial DNA in wine production
Alexandra Verspohl, Università di Modena e Reggio Emilia
VIDEO SEMINAR ENOFORUM 2017: in improvement programmes of wine yeasts the impact of mitochondrial DNA (mtDNA) on the functionality of the cell was usually neglected. Nevertheless, it is an importan...
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Published on: 01/07/2019
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Identification of autochthonous oenococcus oeni from grapes and wines of Priorat (Catalonia, Spain) and their selection for vinification
Judit Franquès, Isabel Araque, Cristina Reguant and Albert Bordons; Universitat Rovira i Virgili, Spain
Oenococcus oeni, the lactic acid bacterium (LAB) mainly responsible for malolactic fermentation, has been repeatedly isolated from wines, but hardly ever from grapes. In this work, a large survey o...
Published on: 01/06/2019
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Immobilization of yeasts in oak chips and cellulose powder for use in bottle-fermented sparkling wine
Carmen Berbegal, ENOLAB, ERI BioTecMed. Universitat de València
VIDEO SEMINAR ENOFORUM 2018: This immobilization system is suitable to be used with other yeasts and bacteria for different winemaking processes (alcoholic or malolactic fermentations).
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Published on: 11/29/2018
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An innovative method for a faster remuage operation
R. Beghi, V. Giovenzana, S. Marai, E. Ferrari, R. Guidetti; Dep. of Agricultural and Environmental Sciences, Università degli Studi di Milano, Italy.
The study proposes the use of ultrasonic vibration to be induced in the bottles via a direct mechanical coupling, so as to be able to speed up the remuage operation.
Published on: 11/28/2018
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