We supply yeast in four forms:
I. Slanted agar
A well-established microbiological laboratory and propagation station are essential for application in operating conditions.
Storage and transport conditions: if the tubes containing the yeast culture are stored in a cool place (1-4 °C), their shelf life is approximately 3 months. After this period, they must be re-inoculated.
During transport, extra care must be taken due to the fragility of the glass tubes (risk of breakage) and the need to monitor the temperature, which should not exceed 20 °C for long periods. Transport time should be minimized (max. 24 hours).
Delivery date
The relevant yeast strain must be ordered at least 2 weeks before the delivery date.
Any yeast strain can be prepared based on the customer’s request.
II. Fermented wort
For application in operation, it requires a well-established propagation station (no microbiological laboratory is necessary). Due to the demanding storage and transport conditions, we offer this form of delivery primarily to domestic customers.
The storage and transport conditions: for this form of yeast culture delivery are very demanding. The temperature must be maintained between 3 and 5 °C, and the shelf life is only a few hours.
Transport is more difficult because it is a liquid medium stored in a plastic barrel. Transport requirements must also be taken into account.
Delivery date
Fermented wort must be ordered at least 3 weeks before the delivery date. The collection date must be set precisely for a specific day; late collection of fermented wort is not possible (see storage conditions). The price of fermented wort is charged even if it has not been collected.
Andrea Švejdová
Preparation: Slanted agar, fermented wort
+420 224 900 152
svejdova@beerresearch.cz
III. Pressed yeast strain RIBM95 (Lager Yeast)
We weigh out any amount of pressed yeast (30% dry matter) according to customer requirements. Dosage – 1.5 g per 1 liter.
Storage and transport conditions: if it is not possible to use the yeast immediately after delivery, it can be stored in a refrigerator at a temperature of 2–5 °C for up to seven days. Transport must be arranged within 72 hours. After that, the yeast must be stored in a refrigerator.
Delivery date: The RIBM95 yeast strain must be ordered at least two weeks before the delivery date for individual deliveries. The yeast strain is delivered in a 100 ml vial.
IV. Lyophilized yeast / RIBM191, 192, 193, 194
reeze-dried yeast. Sublimation of frozen water at low pressure and temperature. Gentler on microorganisms sensitive to higher temperatures.
Dosage – 1.5 g per 10 liters.
Suitable for the production of: special top-fermented beers, beers with fruit and spice aromas, natural ciders, etc. Saccharomyces cerevisiae strains isolated from the spontaneous fermentation of grape must.
Higher alcohol tolerance, low diacetyl production.
Higher fermentation rate, apparent fermentation 67–70%.
Fermentation in the temperature range of 12–22°C, optimum 18–22°C.
Sensory characteristics:
BEER
191 – balanced, harmonious flavor with wine notes, nettle, delicate aroma of cloves
192 – pineapple, tropical fruit, light notes of clove
194 – clean, balanced taste and aroma, without dominant tones (classic ALE, NEIPA)
CIDER
191 – Semi-dry CIDER, aroma and taste of red apple and lemon, delicate acidity
192 – dry CIDER, apple and pineapple, more pronounced acidity
193 – suppressed apple aroma, subtle acidity, dominant blackcurrant and herbs (thyme, thyme)
Dana Pražáková
Preparation: pressed and freeze-dried yeast
+420 727 892 765
prazakova@beerresearch.cz