Wine color practice of saignée (exposing wine to red grape skins for only a short period of time in order to give it a lighter feel closer to that of white wine) or by blending a white wine with a red wine. The presence of a complex mixture of anthocyanins and procyanidins can increase the stability of color in wine. As it ages, the wine undergoes chemical autoxidation reactions involving acetaldehyde of its pigments molecules. The newly formed molecules are more stable to the effect of pH or sulfite bleaching. The new compounds include pyranoanthocyanins like vitisins (A and B), pinotins and
American wine on which varieties of grapes grew best in which regions, held seminars on wine-making techniques, consulted with grape growers and wine-makers, offered academic degrees in viticulture, and promoted the production of quality wines. In the 1970s and 1980s, success by Californian wine-makers in the northern part of the state helped to secure foreign investment from other wine-making regions, most notably the Champenois of France. Wine-makers also cultivated vineyards in Oregon and Washington, on Long Island in New York, and numerous other new locales. Americans became more educated about wines, and increased their demand for high-quality wine. All 50 states now