Acids in wine responsible for the sour taste of vinegar. During fermentation, activity by yeast cells naturally produces a small amount of acetic acid. If the wine is exposed to oxygen, "Acetobacter" bacteria will convert the ethanol into acetic acid. This process is known as the “acetification” of wine and is the primary process behind wine degradation into vinegar. An excessive amount of acetic acid is also considered a wine fault. A taster's sensitivity to acetic acid will vary, but most people can detect excessive amounts at around 600 mg/l. Ascorbic acid, also known as vitamin C, is found in young wine grapes
History of French wine come out with a ranking of the region's wine estates. The 1855 classification of Bordeaux would become one of the world's most famous rankings of wine estates. Wine was becoming a cornerstone of the French economy and a source of national pride as French wine enjoyed international recognition as the benchmark standards for the wine world. A series of events brought this golden age of prosperity to an end. In the 19th century, scientific interest in collecting botanical species led to the exchange of many specimens from around the world—with the unintended consequence of introducing new diseases and aliments to