Wine fault in the context of "Fermentation in winemaking"

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⭐ Core Definition: Wine fault

A wine fault is a sensory-associated (organoleptic) characteristic of a wine that is unpleasant, and may include elements of taste, smell, or appearance, elements that may arise from a "chemical or a microbial origin", where particular sensory experiences (e.g., an off-odor) might arise from more than one wine fault. Wine faults may result from poor winemaking practices or storage conditions that lead to wine spoilage.

In the case of a chemical origin, many compounds causing wine faults are already naturally present in wine, but at insufficient concentrations to be of issue, and in fact may impart positive characters to the wine; however, when the concentration of such compounds exceed a sensory threshold, they replace or obscure desirable flavors and aromas that the winemaker wants the wine to express. The ultimate result is that the quality of the wine is reduced (less appealing, sometimes undrinkable), with consequent impact on its value.

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👉 Wine fault in the context of Fermentation in winemaking

The process of fermentation in winemaking turns grape juice into an alcoholic beverage. During fermentation, yeasts transform sugars present in the juice into ethanol and carbon dioxide (as a by-product). In winemaking, the temperature and speed of fermentation are important considerations as well as the levels of oxygen present in the must at the start of the fermentation. The risk of stuck fermentation and the development of several wine faults can also occur during this stage, which can last anywhere from 5 to 14 days for primary fermentation and potentially another 5 to 10 days for a secondary fermentation. Fermentation may be done in stainless steel tanks, which is common with many white wines like Riesling, in an open wooden vat, inside a wine barrel and inside the wine bottle itself as in the production of many sparkling wines.

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Wine fault in the context of Aroma of wine

The aromas of wine are more diverse than its flavours. The human tongue is limited to the primary tastes perceived by taste receptors on the tongue – sourness, bitterness, saltiness, sweetness and savouriness. The wide array of fruit, earthy, leathery, floral, herbal, mineral, and woodsy flavour present in wine are derived from aroma notes sensed by the olfactory bulb. In wine tasting, wine is sometimes smelled before taking a sip in order to identify some components of the wine that may be present. Different terms are used to describe what is being smelled. The most basic term is aroma which generally refers to a "pleasant" smell as opposed to odour which refers to an unpleasant smell or possible wine fault. The term aroma may be further distinguished from bouquet which generally refers to the smells that arise from the chemical reactions of fermentation and aging of the wine.

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Wine fault in the context of Mourvedre

Mourvèdre (French pronunciation: [muʁvɛdʁ] ; also known as Mataro or Monastrell) is a red wine grape variety grown in many regions around the world. It is found in the Rhône and Provence regions of France, the Valencia, Alicante and Jumilla, Bullas and Yecla denominaciones de origen (DOs) of Spain, as well as the Balearic Islands, California and Washington and the Australian regions of South Australia and New South Wales, plus South Africa. In addition to making red varietal wines, Mourvèdre is a prominent component in "GSM" (Grenache, Syrah, and Mourvèdre) blends. The variety is also used to make rosé and port-style fortified wines.

Mourvèdre tends to produce tannic wines that can be high in alcohol. The style of wine produced from the grapes varies greatly according to where it is produced, but according to wine expert Jancis Robinson Mourvèdre wines often have wild game, or earthy notes to them, with soft red fruit flavors. According to wine expert Oz Clarke, young Mourvèdre can come across as faulted due to the reductive, sulfur notes and "farmyard-y" flavors that some wines can exhibit before those flavors mellow with age.

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Wine fault in the context of Candida (fungus)

Candida is a genus of yeasts. It is the most common cause of fungal infections worldwide and the largest genus of medically important yeasts.

The genus Candida encompasses about 200 species. Many species are harmless commensals or endosymbionts of hosts including humans. When mucosal barriers are disrupted or the immune system is compromised, however, they can invade and cause disease, known as an opportunistic infection. Candida is located on most mucosal surfaces and mainly the gastrointestinal tract, along with the skin. Candida albicans is one of the most commonly isolated species and can cause infections (candidiasis or thrush) in humans and other animals. In winemaking, some species of Candida can potentially spoil wines.

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