what is generally called brewer's yeast. In traditional brewing nearly every brewery has its own variety of yeast.
The main differences between ale and lager production are in temperature and type of yeast used. Lager is fermented at a lower temperature than ale and uses a bottom fermenting yeast whereas ale uses a top fermenting yeast.
True Lager is distinguished from ale by its yeast. Lager yeast ferments at lower temperatures and flocculates on the bottom of the fermenting vessel, while ale yeast ferments at higher temperatures and settles on the tops of fermentation tanks.
Lager is a type of beer that has been fermented using yeast that prefers a cooler temperature than ale yeast. It is made of the same ingredients as beer, namely barley, water, hops, and yeast. The only difference between Lager and Ale is the type of yeast used and the temperatures that it is fermented at. Lagers are a "bottom fermenting" beer that prefers cooler temperatures. Ales are "top fermenting" beers that prefer warmer temperatures.
The process of brewing lager beer is different from other types of beer mainly because of the yeast and fermentation temperature used. Lager beer is brewed with bottom-fermenting yeast at cooler temperatures, resulting in a cleaner and crisper taste compared to ales, which are brewed with top-fermenting yeast at warmer temperatures. This longer, colder fermentation process gives lager beer its characteristic smoothness and lightness.
Yeast are single-celled microorganisms that reproduce by budding. They are biologically classified as fungi and are responsible for converting fermentable sugars into alcohol and other byproducts. There are literally hundreds of varieties and strains of yeast. In the past, there were two types of beer yeast: ale yeast (the "top-fermenting" type, Saccharomyces cerevisiae) and lager yeast (the "bottom-fermenting" type, Saccharomyces uvarum, formerly known as Saccharomyces carlsbergensis). Today, as a result of recent reclassification of Saccharomyces species, both ale and lager yeast strains are considered to be members of S. cerevisiae.Top-Fermenting YeastAle yeast strains are best used at temperatures ranging from 10 to 25°C, though some strains will not actively ferment below 12°C (33). Ale yeasts are generally regarded as top-fermenting yeasts since they rise to the surface during fermentation, creating a very thick, rich yeast head. That is why the term "top-fermenting" is associated with ale yeasts. Fermentation by ale yeasts at these relatively warmer temperatures produces a beer high in esters, which many regard as a distinctive character of ale beers.Top-fermenting yeasts are used for brewing ales, porters, stouts, Altbier, Kölsch, and wheat beers.Bottom-Fermenting YeastLager yeast strains are best used at temperatures ranging from 7 to 15°C. At these temperatures, lager yeasts grow less rapidly than ale yeasts, and with less surface foam they tend to settle out to the bottom of the fermenter as fermentation nears completion. This is why they are often referred to as "bottom" yeasts. The final flavour of the beer will depend a great deal on the strain of lager yeast and the temperatures at which it was fermented.Some of the lager styles made from bottom-fermenting yeasts are Pilsners, Dortmunders, Märzen, Bocks, and American malt liquors.
Brewer's yeast is an ingredient that is used to ferment sugars to alcohol in the brewing of beer.
No yeast, is the fermenting agent used to make beer.
Yeast is an example of migro-organisms of the fungi kingdom, used mostly for fermenting.
Yeast is used to make bread by fermenting the dough.
The main types of beer yeast used in brewing are ale yeast and lager yeast. Ale yeast ferments at warmer temperatures and produces fruity and complex flavors, while lager yeast ferments at cooler temperatures and creates clean and crisp flavors.
"Yeast is a type of fungus used in baking to help dough rise by fermenting sugars."
They use Ale Yeast.Their are hundreds of varietys of strains.Ale yeast is top fermenting.Their is also bottom fermenting yeast which is Lager yeast.Top-fermenting yeasts are used for brewing ales, porters, stouts, Altbier, Kölsch, and wheat beers.ager styles made from bottom-fermenting yeasts are Pilsners, Dortmunders, Märzen, Bocks, and American malt liquors. There are many different "strains" of yeast used in beer making. There are also several companies in the business of culturing yeast for sale to the home brewer. Off the top of my head, White Labs and Wyeast are probably the ideal brands to look for, with Wyeast being the most user friendly. They have "smack packs" which come with a nutrient/starter in the pack and you can tell if it's good yeast when the pack expands.