BOTTOM YEAST Meaning and
Definition
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Bottom yeast refers to a type of yeast that settles at the bottom of fermentation vessels during the beer production process. It is a key component in the production of lager beers, as it ferments at lower temperatures compared to other yeast strains.
Bottom yeast, scientifically known as Saccharomyces pastorianus, is a species of yeast that is able to metabolize sugars and convert them into alcohol and carbon dioxide through the process of fermentation. Unlike top-fermenting yeast strains used in ale production, bottom yeast works at cooler temperatures, typically between 7 and 13 degrees Celsius (45-55 degrees Fahrenheit). This lower fermentation temperature results in a slower and more controlled fermentation process, leading to the characteristic clean and crisp flavors associated with lagers.
The name "bottom yeast" originates from its behavior during the fermentation process. After being introduced into the wort (sugar solution), the yeast cells sink to the bottom of the fermentation vessel, forming a dense sediment. This behavior allows for easier separation of the yeast from the fermented beer, as the clear beer can be drawn off from the top, leaving the settled yeast behind.
Bottom yeast is highly prized by brewers for its ability to produce lagers, a popular style of beer known for its smooth and refreshing qualities. It contributes to the desired flavors and aromas, while also providing natural carbonation through the production of carbon dioxide. Overall, bottom yeast plays a crucial role in the production of lagers, showcasing its unique characteristics and making it an essential component of the brewing process.
Common Misspellings for BOTTOM YEAST
- vottom yeast
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Etymology of BOTTOM YEAST
The term "bottom yeast" originated from the brewing industry and is commonly used to refer to a type of yeast used in bottom fermentation. The etymology of the word can be broken down as follows:
1. Bottom: In the brewing context, "bottom" refers to the fact that this type of yeast settles down at the bottom of the fermenting vessel during the fermentation process. The term "bottom" can be attributed to the yeast's behavior of sinking to the bottom and not actively rising to the top like other types of yeast.
2. Yeast: The word "yeast" itself comes from Old English "gist" or "gyst", which is believed to have derived from the Proto-Germanic word "*jestuz". This original root has connections to various Germanic languages and ultimately traces back to the Proto-Indo-European root "*yes-" meaning "boil" or "foam".
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