Saccharomyces cerevisiae: Difference between revisions
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==Uses== | ==Uses== | ||
===Primary=== | ===Primary=== | ||
* | * [[Carbon dioxide]] production. (Leavening bread) | ||
=== | * [[Ethanol]] production via [[fermentation]]. | ||
* | ==Natural Occurrence== | ||
* This species of yeast '''does''' occur naturally | |||
==Hazards== | |||
* GRAS ''and'' safe for oral consumption as food. | |||
==Character== | |||
This species: | |||
* is aerobic and a facultative anaerobe. | |||
* can use [[ammonia]] or [[urea]] as the sole nitrogen source, but not nitrates. | |||
* is a top fermenter, meaning it tends to migrate to the top of fluids in which it feeds by maintaining contact with the bubbles of carbon dioxide it produces | |||
* experiences optimum growth between 30–35 °C (86–95 °F) | |||
* this species goes dormant at low temperatures (5°C) | |||
* goes dormant at lower temperatures (5°C) | |||
==Cultivation== | ==Cultivation== | ||
# Grind 1/2L of grain very fine | # Grind 1/2L of grain very fine | ||
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# Wait one day<br>'''Check:''' If the solution is not fizzing (carbonated, small bubbles rising from within) discard it and repeat from the beginning. | # Wait one day<br>'''Check:''' If the solution is not fizzing (carbonated, small bubbles rising from within) discard it and repeat from the beginning. | ||
# Discard any foam on top of the water | # Discard any foam on top of the water | ||
==See Also== | |||
* [[Mead]] |
Revision as of 01:17, 25 June 2019
Type | fungi |
---|---|
Domain | fruit skins |
Uses
Primary
- Carbon dioxide production. (Leavening bread)
- Ethanol production via fermentation.
Natural Occurrence
- This species of yeast does occur naturally
Hazards
- GRAS and safe for oral consumption as food.
Character
This species:
- is aerobic and a facultative anaerobe.
- can use ammonia or urea as the sole nitrogen source, but not nitrates.
- is a top fermenter, meaning it tends to migrate to the top of fluids in which it feeds by maintaining contact with the bubbles of carbon dioxide it produces
- experiences optimum growth between 30–35 °C (86–95 °F)
- this species goes dormant at low temperatures (5°C)
- goes dormant at lower temperatures (5°C)
Cultivation
- Grind 1/2L of grain very fine
- Mix it into 2L of water
- Place the mixture in a well-washed well-rinsed clean bowl with a wide brim
- If possible, place a screen or fine-woven mat over the pot in place of a lid. It would let the air flow in freely, but not bugs.
- Wait one day
Check: If the solution is not fizzing (carbonated, small bubbles rising from within) discard it and repeat from the beginning. - Discard any foam on top of the water