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Spoilage (wine)
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.M. Baldy: ''"The University Wine Cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organoleptic
Organoleptic properties are the aspects of food, water or other substances as apprehended via the senses—including taste, sight, smell, and touch. In traditional U.S. Department of Agriculture meat and poultry inspections, inspectors perform various organoleptic procedures to detect disease or contamination. Such techniques contribute to the effort to detect invisible food-borne pathogens that cause food poisoning. Organoleptic tests are sometimes conducted to determine if food or pharmaceutical products can transfer tastes or odors to the materials and components they are packaged in. Shelf-life Shelf life is the length of time that a commodity may be stored without becoming unfit for use, consumption, or sale. In other words, it might refer to whether a commodity should no longer be on a pantry shelf (unfit for use), or no longer on a s ... studies often use taste, sight, and smell (in addition to food chemistry and toxicology tests) to determine whether a food p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volatile Acidity
Volatility or volatile may refer to: Chemistry * Volatility (chemistry), a measuring tendency of a substance or liquid to vaporize easily ** Volatile organic compounds, organic or carbon compounds that can evaporate at normal temperature and pressure *** Volatile anaesthetics, a class of anaesthetics which evaporate or vaporize easily *** Volatile substance abuse, the abuse of household inhalants containing volatile compounds *** Volatile oil, also known as essential oil, an oil derived from plants with aromatic compounds used in cosmetic and flavoring industries * Relative volatility, a measure of vapor pressures of the components in a liquid mixture * Volatile acid/Volatile acidity, a term used inconsisitenly across the fields of winemaking, wastewater treatment, physiology, and other fields * Volatile (astrogeology), a group of compounds with low boiling points that are associated with a planet's or moon's crust and atmosphere Computer science * Volatile variables, var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malolactic Fermentation
Malolactic conversion (also known as malolactic fermentation or MLF) is a process in winemaking in which Tart (flavor), tart-tasting malic acid, naturally present in grape must, is converted to softer-tasting lactic acid. Malolactic fermentation is most often performed as a secondary fermentation (wine), secondary fermentation shortly after the end of the primary fermentation (wine), fermentation, but can sometimes run concurrently with it. The process is standard for most red wine production and common for some white grape varieties such as Chardonnay, where it can impart a "buttery" flavor from diacetyl, a byproduct of the reaction. The fermentation reaction is undertaken by the family of lactic acid bacteria (LAB); ''Oenococcus oeni'', and various species of ''Lactobacillus'' and ''Pediococcus''. Chemically, malolactic fermentation is a decarboxylation, which means carbon dioxide is liberated in the process.K. Fugelsang, C. Edwards ''Wine Microbiology'' Second Edition pgs 29-44 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sparkling (wine)
Sparkling wine is a wine with significant levels of carbon dioxide in it, making it fizzy. While it is common to refer to this as champagne, European Union countries legally reserve that word for products exclusively produced in the Champagne region of France. Sparkling wine is usually either white or rosé, but there are examples of red sparkling wines such as the Italian Brachetto, Bonarda and Lambrusco, and the Australian sparkling Shiraz. The sweetness of sparkling wine can range from very dry ''brut'' styles to sweeter ''doux'' varieties (French for 'hard' and 'soft', respectively).J. Robinson (ed) ''"The Oxford Companion to Wine"'' Third Edition pp 656–660, Oxford University Press 2006 . The sparkling quality of these wines comes from its carbon dioxide content and may be the result of natural fermentation, either in a bottle, as with the traditional method, in a large tank designed to withstand the pressures involved (as in the Charmat process), or as a result of sim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
