Saccharomyces Cerevisiae – The ‘only strain’ for Germanic aromatic white wines.
AW4 is noted for developing powerfully fragrant, full spice aromatic wines and is a perfect match for Gewurztraminer and also recommended for Sauvignon and Semillon where the Oenologist requires a positive aromatic esters contribution from the yeast.
AW4 is a good fermenter across the range 14 to 30ºC (57 -86ºF), low foam formation and medium to high glycerol. It will ferment up to 14.5% abv. ethanol providing the temperature is held within the 20 – 25ºC (68 -77ºF) range and the pH is above 3.0
Diammonium Phosphate, powder for use in winemaking. This is the basic nitrogen source in nearly all wine yeast nutrients. It can be used by itself or to augment some of the more expensive complete nutrients. At certain stages of fermentation it will help inhibit formation of reduced sulfur compounds.
oung’s Dessert / High Alcohol Wine Yeast is an exceptional strain that allows optimum wine quality to be achieved with each and every brew. It’s properties include an ability to ferment up to 18% ABV, rapid clearing, low foam formation, and the ability to ferment as low as 10°C means this is a reliable and easy to handle strain. You can expect a taste and aroma profile that will bring the natural grape flavours to the fore, it will also add a definite weight and depth to your wine, making it perfect for high alcohol sweet wines. Excellent across numerous varietals producing classic, true to type sweet, flavoursome wines with balanced mouthfeel and smooth finish, exuding the baked fruit flavours synonymous with high alcohol wines. Making well structured, clean wines that are a wonderful accompaniment to many after dinner treats is what this strain does beautifully.
Alcohol tolerance: 18% v/v
SO tolerance: High
Low production of fusel oils
Viability: >1.0x 10 CFU/g
Wild yeast: 1 per millin
During yeast manufacture, special processs are employed to promote very high leveles of the natural compound – Trehalose within the yeast.
Trehalose is a natural sugar produced within the yeast cells to protect itself during prolonged storage and stress conditions.
The very high levels of trehalose acheieved also remove the need for re-hydration before adding to must or wort – there is now no advantage in doing this even for high alcohol wines.
Saccharomyces Cerevisiae – Exceptional strain for full fruit varietal and country red wines promoting good structure, balance and colour.
The majority of yeast strains strip out fruit flavour and colour from the must, not so with VR21 which is particularly noted for preserving and retaining the natural fruit characteristics of the grape / country fruit and enhancing palate length.
VR21 is a relatively neutral strain producing subtle levels of aroma and flavour compounds, allowing full expression of varietal / country characteristics whilst enhancing colour, wine structure and balance.
VR21 is an ethanol tolerant killer strain, capable of fermenting to 15% abv. ethanol. Good production of glycerol, low volatile acid production, zero sulfur dioxide formation and low foaming.
VRE21 is capable of fermenting between 59 – 86°F but best results are achieved when a temperature between 68 – 75.2°F is maintained, unless cold fermenting is desired for flavour/aroma development.