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Wine microbiology

Innovative methods of extracting mannoproteins from lees and accelerating autolysis
Alberto De Iseppi, University of Padua; Antonio Morata, Polytechnic University of Madrid (UPM)
Extracting yeast mannoproteins and using ultrasound to accelerate aging on lees.
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Published on: 05/26/2021
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Re-appearance of residual viable yeasts during wine microoxigenation applied after malolactic fermentation: Efect on the sensory profile of a Merlot wine
M.P. Sáenz-Navajas, LAAE, Univ. de Zaragoza, Spain
La micro-oxygénation (Mox) appliquée après la fermentation malolactique (FML) vise à induire un vieillissement accéléré du vin afin d'anticiper sa mise sur le marché. Dans des conditions idéales,
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Published on: 11/25/2020
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Bio-protection in oenology: a real alternative to sulphites?
Hervé Alexandre, Université de Bourgogne, France
One of the economic and societal challenges of recent years is to reduce the quantity of chemicals used in the agri-food industry. In wine, one method of limiting the addition of sulphites, a harmful
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Published on: 11/02/2020
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The oenological potential of Hanseniaspora vineae yeast strains to industrial wine production
Eduardo Dellacassa, Universidad de la República del Uruguay (UY)
Many compounds associated to flavour and wine colour are known to be yeast strain-dependent. Because these metabolites are important for the sensory quality of wines, it is important to understand ...
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Published on: 10/08/2020
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Effect of the addition of bee pollen to white grape must during alcoholic fermentation
Antonio Amores-Arrocha, Universidad de Cádiz, Spain
The use of activators during fermentation is a highly advisable practice since it favors the yeast metabolism and cell growth, increasing the fermentation rate and improving the sensory quality of ...
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Published on: 10/08/2020
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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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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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Novel microencapsulated yeast for the production of sparkling wine by traditional method
Ilaria BENUCCI, Marco ESTI; DAFNE, Tuscia University,
Despite the efforts recently made to improve the application of encapsulated yeasts in the secondary fermentation for the production of sparkling wines by traditional method, no research investigated
Published on: 03/15/2020
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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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Glycosidic aroma precursors: importance for wine and sparkling wine
Winterhalter, P. Institute of Food Chemistry, TU Braunschweig, Germany
After the first identification of glycosidic aroma progenitors in grapes and wine considerable progress has been made with regard to their analysis, structure and reactivity. One topic that had att...
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Published on: 02/19/2020
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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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Inactivated yeasts: production and technological characteristics
Piergiorgio Comuzzo, Di4A, Università di Udine; Federico Giotto, Giottoconsulting srl; Gianmaria Zanella, Enologica Vason
The role of yeast derivatives in the activation of alcoholic fermentation is well known. However, the lack of knowledge about the composition of these products makes their use essentially based on ...
Published on: 02/17/2020
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The visual appeal of the color of red wine: microbiological implications
José Antonio SUAREZ-LEPE ; Universidad Politécnica de Madrid. Grupo Enotec-UPM
Generally, the first sensory impression of a wine is visually perceived. Color, intensity, tonality,... gives us information about the elaboration processes, variety, ageing, oxidation and stabiliz...
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Published on: 07/29/2019
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Improvement of wine yeasts fermentative efficiency by food-grade antioxidant treatment during active dry yeast (ADY) production
Emilia Matallana Redondo, Universitat de València, Spain
The use of ADY in modern oenology imposes a major challenge to the starter’s ability to ferment grape must sugars quickly and efficiently. Among the adverse factors during ADY production, oxi...
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Published on: 06/13/2019
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