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The yeast gives the resulting sherry its distinctive fresh taste, with residual flavors of fresh bread. Depending on the development of the wine, it may be aged entirely under the veil of flor to produce a fino or manzanilla sherry, or it may be fortified to limit the growth of flor and undergo oxidative aging to produce an amontillado or ...
Schizosaccharomyces, the only wine yeast that reproduced by fission whereas most wine yeast reproduce by budding. [4] Zygosaccharomyces, very alcohol-tolerant and can grow in wines up to 18% v/v. Additionally this yeast can survive in extremely high sugar levels (as much as 60% w/w or 60 Brix) and is very resistant to sulfur dioxide. [4]
Oloroso ("scented" in English) is a variety of fortified wine made in Jerez and Montilla-Moriles and produced by oxidative aging. It is normally darker than Amontillado. Oloroso is usually dark and nutty. Unlike the fino and Amontillado sherries, in oloroso the flor yeast is suppressed by fortification at an earlier stage. This causes the ...
The natural occurrence of fermentation means it was probably first observed long ago by humans. [3] The earliest uses of the word "fermentation" in relation to winemaking was in reference to the apparent "boiling" within the must that came from the anaerobic reaction of the yeast to the sugars in the grape juice and the release of carbon dioxide.
The art and science of making wine. Also called enology (or oenology). Not to be confused with viticulture. Vinification The process of making grape juice into wine. Vin jaune French for "yellow wine", a wine fermented and matured under a yeast film that protects it, similar to the flor in Sherry production. Vinimatic
The venencia is an implement used for pulling Sherry samples from the aging barrels in the cellars, consisting of a small cylindrical steel cup at the end of a long flexible shaft. [1] It is dropped in to the barrels through the bunghole to break through the protective yeast called 'flor' that covers the aging wine. It is then poured into a ...
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Consisting of approximately 30% protein, yeast cell walls have a chemical affinity with wine compounds, such as those that may be polyphenolic or metallic. Indeed, yeast fining is a practical means of removing excess copper ions (greater than 0.5 mg/L) when copper sulfate is used to bind selected volatile sulfur compounds (VSCs). [2]
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