These carbohydrates or sugars are the primary oxidation products of polyhydric alcohols and are composed of carbon atoms, OH groups and an aldehyde group. They are classified according to their molecular size into monosaccharides (single sugars), oligosaccharides (multiple sugars) and polysaccharides (chains of monosaccharides, such as starch and cellulose). The disaccharides (twofold sugars) are a subgroup of the oligosaccharides (there are also tri- and tetrasaccharides). The most important (dual) sugar in grape must is sucrose.
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi