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280 nm 45 min LC chromatogram of a red wine, showing mainly phenolic compounds. Wine is a complex mixture of chemical compounds in a hydro-alcoholic solution with a pH around 4. The chemistry of wine and its resultant quality depend on achieving a balance between three aspects of the berries used to make the wine: their sugar content, acidity ...
The soil drains well and is relatively high in nutrients. Australian winemakers have found some success with Cabernet Sauvignon plantings. [2] Tufa – A highly friable calcareous bedrock that breaks down into a fine crumb structure. Ultisol – A highly weathered, largely infertile, clay-based soil—usually brilliant red in colo—rfound in ...
A place where grape vines are grown for wine making purposes. Vintage The year in which a particular wine's grapes were harvested. When a vintage year is indicated on a label, it signifies that all the grapes used to make the wine in the bottle were harvested in that year. Viticulture The cultivation of grapes. Not to be confused with viniculture.
Sugar's role in dictating the final alcohol content of the wine (and such its resulting body and "mouth-feel") sometimes encourages winemakers to add sugar (usually sucrose) during winemaking in a process known as chaptalization solely in order to boost the alcohol content – chaptalization does not increase the sweetness of a wine. [1]
A glass of red wine. The health effects of wine are mainly determined by its active ingredient – alcohol. [1] [2] Preliminary studies found that drinking small quantities of wine (up to one standard drink per day for women and one to two drinks per day for men), particularly of red wine, may be associated with a decreased risk of cardiovascular diseases, cognitive decline, stroke, diabetes ...
Soil can have a significant impact on the potential quality of wine. While geologist and viticulturist are not exactly sure what type of immutable or terroir based qualities that soil can impart on wine, there is near universal agreement that a soil's water retention and drainage abilities play a primary role.
Grapes ripening on the vine. In viticulture, ripeness is the completion of the ripening process of wine grapes on the vine which signals the beginning of harvest.What exactly constitutes ripeness will vary depending on what style of wine is being produced (sparkling, still, fortified, rosé, dessert wine, etc.) and what the winemaker and viticulturist personally believe constitutes ripeness.
The primary role of yeast is to convert the sugars present (namely glucose) in the grape must into alcohol.The yeast accomplishes this by utilizing glucose through a series of metabolic pathways that, in the presence of oxygen, produces not only large amounts of energy for the cell but also many different intermediates that the cell needs to function.