Carbohydrate: nm Ripe grape juice contains between 15 and 25% carbohydrates. These are fermentable grape sugars, made up of glucose (synonym: dextrose), and fructose. During ripening, grapes store sugar. This sugar (or sucrose) produced by photosynthesis is hydrolyzed into glucose and fructose. Migration to grapes takes place in the form of reducing sugars.
At the vinification stage, some of the sugars initially present in the ...
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