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Yeast ferment sugar anaerobically to give which products?
Ethanol and CO2
Principal sugars in grapes
Glucose and Fructose
The sugar level is measured measured in which units?
Brix
Grape juice is also called as
Must
Which components gives wine a bitter flavour?
Tannins / Tannic acid
What is the pH of grape juice?
Acidic pH 3 - 4
Any one desirable property of wine yeast.
➢growth at the relatively high acidity (i.e., low pH) of grape juice; ➢resistance to high alcohol content (higher than 10%); ➢resistance to sulfite.
___________ contains the skins, pulp, seeds, and stems of the fruit.
Pomace
What is "lees" ?
The yeast sediment Is known as ‘lees’.
Bacteria that perform malo-lactic fermentation.
Lactobacillus & Leuconostoc
What is ‘blue fining’ ?
Removal of metal ions is accomplished with potassium ferrocyanide known as ‘blue fining’
What is "liquer de tirage" ?
A solution of wine, sugar and yeast added to a bottle of still base wine
What is "dosage" and why is it added in Champagne production?
A mixture of sugar and wine called dosage is used to add sweetness.
In Champagne Wine, the lees by a process called ____________.
Remuage.
