Viniflora Oenos Viniflora Oenos is a freeze-dried culture of malolactic bacteria. Viniflora Oenos has gained popularity rapidly because it can be added directly to the wine in dry form to start malolactic fermentation. Yeast Extract Yeast extract is added to juice to prevent stuck fermentations by stimulating healthy yeast growth. Yeast extract provides additional vitamins, amino acids, etc. It is more effective when added before fermentation is started.
Yeast extract is a major ingredient in many proprietary yeast supplements.
These additions are made deliberately to improve color, clarity, stability or general wine quality. Each fining material can affect wine characteristics differently. Often one characteristic is improved at the expense of another, so fining wine is usually a compromise of some kind. Considerable winemaking experience is needed before wine fining materials can be used effectively. The types of material and the quantities to be used are usually determined by testing a small batch of wine and observing the results.