Grape must is a thick, dark syrup made from the juice and skins of red or white grapes. It contains the natural sugars, acids and tannins found in grapes, as well as the unpressed grape solids. It has a sweet and sour taste and can be used to make wine, vinegar or preserves.
yeast
Alternative yeasts to replace sulfites in wines
New research has found that using alternative yeasts can be an effective way to reduce the use of sulfur dioxide in wine production. This is important because sulfur dioxide is a common additive in wine and reducing its use can have a positive effect on the health of wine drinkers.
What is wine sediment and how does the wine sediment get into my glass?
Have you ever poured a glass of fresh, chilled white wine and noticed something strange at the bottom of your glass? If so, don't worry - it's just wine sediment! Wine sediment consists of dead yeast cells, tartaric acid crystals and other bits of grape residue that can fall out of suspension as the wine ages.