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 Wine Advocate Thomases, Jay Miller and Antonio Galloni. While not the first American wine publication, nor the first to use a numerical wine ratings scale, "The Wine Advocate" was the first to widely adopt the 50-100 point scale and use it as parallel to the American educational grading system. This system was familiar to Robert Parker's original target audience—the average American consumer—and provided a guideline for quantifying a wine's quality in a standardize format. Retailers have used "The Wine Advocate's" "Parker scores" to aggressively market wines with high scores. The scores have also become focal points for collectors and wine investors who