Grape juice in the context of "Grape"

A vineyard (/ˈvɪnjərd/ VIN-yərd, UK also /ˈvɪnjɑːrd/ VIN-yard) is a plantation of grape-bearing vines. Many vineyards exist for winemaking; others for the production of raisins, table grapes, and non-alcoholic grape juice. The science, practice and study of vineyard production is known as viticulture. Vineyards are often characterised by their terroir, a French term loosely translating as "a sense of place" that refers to the specific geographical and geological characteristics of grapevine plantations, which may be imparted to the wine itself.

Wine is an alcoholic drink made from fermented grape juice. It is produced and consumed in many regions around the world, in a wide variety of styles which are influenced by different varieties of grapes, growing environments, viticulture methods, and production techniques.

Wine has been produced for thousands of years, the earliest evidence dating from c. 6000 BCE in present-day Georgia. Its popularity spread around the Mediterranean during Classical antiquity, and was sustained in Western Europe by winemaking monks and a secular trade for general drinking. New World wine was established by settler colonies from the 16th century onwards, and the wine trade increased dramatically up to the latter half of the 19th century, when European vineyards were largely destroyed by the invasive pest phylloxera. After the Second World War, the wine market improved dramatically as winemakers focused on quality and marketing to cater for a more discerning audience, and wine remains a popular drink in much of the world.

A winemaker or vintner is a person engaged in winemaking. They are generally employed by wineries or wine companies, where their work includes:

• Cooperating with viticulturists
• Monitoring the maturity of grapes to ensure their quality and to determine the correct time for harvest
• Crushing and pressing grapes
• Monitoring the settling of juice and the fermentation of grape material
• Filtering the wine to remove remaining solids
• Testing the quality of wine by tasting
• Placing filtered wine in casks or tanks for storage and maturation
• Preparing plans for bottling wine once it has matured
• Making sure that quality is maintained when the wine is bottled

Today, these duties require an increasing amount of scientific knowledge, since laboratory tests are gradually supplementing or replacing traditional methods. Winemakers can also be referred to as oenologists as they study oenology – the science of wine.

The process of fermentation in winemaking turns grape juice into an alcoholic beverage. During fermentation, yeasts transform sugars present in the juice into ethanol and carbon dioxide (as a by-product). In winemaking, the temperature and speed of fermentation are important considerations as well as the levels of oxygen present in the must at the start of the fermentation. The risk of stuck fermentation and the development of several wine faults can also occur during this stage, which can last anywhere from 5 to 14 days for primary fermentation and potentially another 5 to 10 days for a secondary fermentation. Fermentation may be done in stainless steel tanks, which is common with many white wines like Riesling, in an open wooden vat, inside a wine barrel and inside the wine bottle itself as in the production of many sparkling wines.

Must is freshly crushed fruit juice (usually grape juice) that contains the skins, seeds, and stems of the fruit. The solid portion of the must is called pomace and typically makes up 7–23% of the total weight of the must. Making must is the first step in winemaking. Because of its high glucose content, typically between 10 and 15%, must is also used as a sweetener in a variety of cuisines. Unlike commercially sold grape juice, which is filtered and pasteurized, must is thick with particulate matter, opaque, and comes in various shades of brown and purple. The name comes from the Latin vinum mustum; lit. 'young wine'.