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Grapes being pressed to create must. Must (from the Latin vinum mustum; lit. ' young wine ') 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 ...
A winemaker running a paper chromatography test to determine whether a wine has completed malolactic fermentation. Malolactic conversion (also known as malolactic fermentation or MLF) is a process in winemaking in which tart-tasting malic acid, naturally present in grape must, is converted to softer-tasting lactic acid.
Chaptalization is the process of adding sugar to unfermented grape must in order to increase the alcohol content after fermentation. The technique is named after its developer, the French chemist Jean-Antoine-Claude Chaptal. [1] This process is not intended to make the wine sweeter, but rather to provide more sugar for the yeast to ferment into ...
The grape reaction product (GRP, GRP1 or 2-S-glutathionyl caftaric acid [1]) is a phenolic compound explaining the disappearance of caftaric acid from grape must during processing. [2] It is also found in aged red wines. [3] Its enzymatic production by polyphenol oxidase is important in limiting the browning of musts, [4] especially in white ...
Another advancement was the complete enclosure of the press (sometimes called "tank press") that reduced the exposure of the grape must to air. Some advance presses can even be flushed with nitrogen to create a complete anaerobic environment that can be desired for wine making with white wine grapes.
To make crack grapes, simply melt a few Jolly Rancher candies in the microwave in a silicone baking cup, then dip fruit stabbed onto wooden skewers into the mixture to lightly coat.
Vine-Glo was a grape concentrate brick product sold in the United States during Prohibition by Fruit Industries Ltd, a front for the California Vineyardist Association (CVA), from 1929. It was sold as a grape concentrate to make grape juice from but it apophatically included a warning with instructions on how to make wine from it. [ 1 ]
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