... blocking contact with air. 4. Fruit Wines (Enzymes for Fermenting Vegetables and Fruits) Fruit wines are made by yeasts, alcohol fermentation ... to minimize contact with air in making fruit wines. If air remains inside the wines, 1) Alcohol becomes oxide by acetobacters ... fermentation fungi, and generate foreign materials. If you store fruit wines in e-jen, vacuum and airtight storage container, 1) you ...