Acids in wine ripened grapes. While concentration varies among grape varieties, it is usually found in higher levels with red wine grapes. The acid is created as a byproduct of the metabolization of nitrogen by yeast cells during fermentation. The combination of succinic acid with one molecule of ethanol will create the ester mono-ethyl succinate responsible for a mild, fruit aroma in wines. Acidity is highest in wine grapes just before the start of "veraison", which ushers in the ripening period of the annual cycle of grape vines. As the grapes ripen, their sugar levels increase and their acidity levels decrease. Through the
Wine in religious communities of the Middle East drinks such as "tilā’" and "naqir" as inebriating and thus forbade the pressing of grapes and the drinking of pressed grape juice. As the early Muslim armies conquered more territory, though, increasing populations of non-Muslims were brought under Muslim rule, necessitating the development of a body of law regulating the interaction between Muslims and non-Muslim dhimmis. A document used for guiding Muslim pacts with dhimmi communities known as the "Shuruṭ ‘Umar" forbids dhimmis from selling forbidden products – pork, wine, carrion – to Muslims. The Egyptian Jewish communities of the medieval period used wine sacramentally in feasts, prayers, and at