Phenolic content in wine - quercetin. Like other flavonoids, the concentration of flavonols in the grape berries increases as they are exposed to sunlight. Some viticulturalists will use measurement of flavonols such as quercetin as an indication of a vineyard's sun exposure and the effectiveness of canopy management techniques. Anthocyanins are phenolic compounds found throughout the plant kingdom, being frequently responsible for the blue to red colors found in flowers, fruits and leaves. In wine grapes, they develop during the stage of "veraison" when the skin of red wine grapes changes color from green to red to black. As the sugars in the grape
The Fox and the Grapes for some forty years and were imitated by other factories in France and abroad, being used not just as wall hangings but for chair covers and other domestic purposes. Furniture craftsmen in France also used the fables as themes and took these with them when they emigrated. Among them was Martin Jugiez (d.1815), who had a workshop in the American city of Philadelphia where the still surviving Fox and Grapes chest of drawers was produced. The Sèvres porcelain works used the fables on their china as well as reproducing Pierre's Julien's statue from a preliminary model in 1784, even before