Port wine be labelled as "port" or "Porto". In the United States, wines labelled "port" may come from anywhere in the world, while the names "Oporto", "Porto", and "Vinho do Porto" have been recognized as foreign, non-generic names for port wines originating in Portugal. Port is produced from grapes grown and processed in the demarcated Douro region. The wine produced is then fortified by the addition of a neutral grape spirit known as aguardente in order to stop the fermentation, leaving residual sugar in the wine, and to boost the alcohol content. The fortification spirit is sometimes referred to as brandy but
Russian wine wine is produced in the area around Stavropol which has 180-190 frost free days. The region of Rostov is characterized by its hot, dry summers and severe winters which produces grapes in lower yields than other parts of the country. Nevertheless Rostov is a region with a great diversity of atochtonous grape varieties which originally from the Don Valley including sunch az Tsimlyankskiy Tchernyi, Kumshatskiy, Krasnostop Zolotovskiy, Plechistik and others Russia produces wine of several different styles including still, sparkling and dessert wine. Currently there are over 100 different varieties of grapes used in the production of Russian wine. The