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Topic: Bottom and top fermenting yeast

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Top-fermenting yeast - Wikipedia, the free encyclopedia Top-fermenting yeasts are unable to ferment some types of sugars, and the resulting beer is sweeter and "fruitier". Beers that use top-fermenting yeast are called ales, and for that reason these yeasts are also sometimes called "ale yeasts". Top-fermenting yeast, saccharomyces cerevisiae, is one of the two types of yeast used in the brewing of beer, so called because during the fermentation process it rises to top of the fermentation vessel. en.wikipedia.org /wiki/Top-fermenting_yeast   (115 words)

Beer Brewing; The Art and Science - Yeast The two main varieties of yeast used for beer brewing are top-fermenting yeast (Saccharomyces cerevisiae) and bottom-fermenting yeast (Saccharomyces uvarum). Bottom fermenting yeast, as is expected, flocculates at the bottom of the vessel and spends most of its life-cycle in the sedimentary state. Top fermenting yeast is named as such because most strains exhibit the tendancy to floculate (gather) at the surface of the beer during the first few days of fermentation. www.rpi.edu /dept/chem-eng/Biotech-Environ/beer/yeast/yeast1.htm   (339 words)

Beer Brewing; The Art and Science - Yeast The two main varieties of yeast used for beer brewing are top-fermenting yeast (Saccharomyces cerevisiae) and bottom-fermenting yeast (Saccharomyces uvarum). Bottom fermenting yeast, as is expected, flocculates at the bottom of the vessel and spends most of its life-cycle in the sedimentary state. Top fermenting yeast is named as such because most strains exhibit the tendancy to floculate (gather) at the surface of the beer during the first few days of fermentation. www.rpi.edu /dept/chem-eng/Biotech-Environ/beer/yeast/yeast1.htm   (339 words)

Bottom-fermenting yeast - Wikipedia, the free encyclopedia Beers that use only bottom-fermenting yeast are called lagers, and for that reason these yeasts are also sometimes called "lager yeasts". Bottom-fermenting yeast, usually of the species saccharomyces uvarum (sometimes saccharomyces carlsbergensis), is one of the two types of yeast used in the brewing of beer, so called because when the fermentation process is complete it settles to the bottom of the fermentation vessel. en.wikipedia.org /wiki/Bottom-fermenting_yeast   (339 words)

Microbrewery - Beer Brewing Process - Richbrau Brewing - Richmond VA Ales are produced using top fermenting yeast and lagers are produced with bottom fermenting yeast. A generic name for beers produced by top fermentation, usually by infusion mashing, as opposed to lagers produced produced by bottom fermentation. A generic term for any beer produced by bottom cold, (lagering) fermentation, usually by decoction mashing, as opposed to top-fermented beers. www.richbrau.com /brews.shtml   (719 words)

Beer Glossary Fermentation with a yeast which tends to settle at the bottom of the fermenting vessel. Fermentation with a yeast which tends to rise to the top of the fermenting vessel. Yeast is a single cell organism whose metabolism converts the sugars contained in the malt into alcohol and carbon dioxide. www.derekthomas.co.uk /beer/glossary.htm   (6734 words)

Amber Waves Lagers are produced by bottom-fermenting yeast, that is, the yeast that like to live and work on the bottom of the fermenting beer. Ales are produced by top-fermenting yeast, that is, the yeast like to live on top of the fermenting beer. Since the spigot is a couple of inches off the bottom of the fermenter, you can see the old, leftover, dead yeast remain behind, out of the beer; and that's good. www.goodeatsfanpage.com /Season6/Beer/BeerTrans.htm   (2909 words)

Beer Yeast At the break, top and bottom fermenting yeast cells can agglomerate and sink to the bottom, thus contribute to the clarification of beer. Abby style top fermenting yeast, suitable for high gravity beers (doubles, triples and barley wines). Ferments dry, finishes soft, smooth and clean, and is very well balanced. www.bev-art.com /Beer_Yeast.html   (2909 words)

GLOSSERY Lagers are brewed with bottom fermenting yeast at cooler temperatures than ales. Lager: beer fermented with bottom fermenting yeast at a lower temp. When you are ready to use it you "smack" the inner package and the yeast and wort mix with out exposing it to air. showcase.netins.net /web/homebrew/append.html   (2909 words)

Beer Yeast Unique top fermenting yeast which produces the unique and spicy weizen character, rich with clover, vanilla and banana. S-23 This bottom fermenting yeast is widely used by Western European commercial breweries. A blend of top fermenting ale and wheat strains producing mildly estery and phenolic wheat beers. www.the-home-brew-shop.co.uk /cat51_1.htm   (308 words)

brewing yeast If you would like to ferment your beer in the traditional 'lager style of brewing' then you can purchase Saflager S23 (Saccharomyces carlbergensis) yeast which is a premium strain for bottom fermenting all Lager and Pilsener styles of beer. It is a top cropping ale yeast suitable for top fermented beers with low esters levels and can be used for Belgian type wheat bers. This yeast, which is of German origin and used by Western commercial breweries, develops the best of its fruity and estery lager flavours when fermented at low temperatures between 9C - 15C (ideally 12C). www.ibrew.com.au /html/beer/yeast.html   (274 words)

Alan Pugsley and Pugsley's Brewing Projects International - Brewing Systems - Brewery Design, Brewer Training and Beer Brewing Systems and Equipment The Ale fermenting room utilizes open fermentation with a top fermenting yeast and the Lager fermenting room utilizes Uni-tanks in conjunction with a bottom fermenting lager yeast. The disadvantages are that the system can only be used for ale production and formulations are restricted to the use of top fermenting yeasts. It uses enclosed, conical bottomed fermenters that can be used for fermenting ales and lagers (hence the term "reversible"). www.wowpages.com /pugsley/systems.htm   (688 words)

Beer & Brewing Terminology - Beer Advocate The top fermenting yeast perform at warmer temperatures than do yeast's used to brew lager beer, and their byproducts are more evident in taste and aroma. Fermentation is triggered by the addition of sugar and/or yeast which leaves sediment in the bottle. The addition of yeast and/or sugar to the cask or bottle to aid secondary fermentation. beeradvocate.com /beer/101/terms.php   (2717 words)

Yeast Guide - Beer Advocate Top-fermenting yeasts are used for brewing ales, porters, stouts, Altbier, Kölsch, and wheat beers. Lager 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. Beer that is exposed to the surrounding open air to allow natural/wild yeast and bacteria to literally infect the beer, are spontaneous fermented beers. beeradvocate.com /beer/101/yeast.php   (741 words)

The On-Line Guide to Belgian Beer - Belgian Homebrewing This does not mean a quart of fliud with yeast on the bottom, it means a quart bottle with an inch of fluid on the top and the rest is yeast. A top fermenting yeast which produces a soft, bread like flavor and leaves a sweet, mildly estery finish. This strong fermenting yeast attenuates well and produces a fruity, estery malt profile but is a little slow to flocculate. belgianstyle.com /mmguide/brew/yeast.html   (741 words)

Yeast Guide - Beer Advocate .com Top-fermenting yeasts are used for brewing ales, porters, stouts, Altbier, Kölsch, and wheat beers. Lager 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. Beer that is exposed to the surrounding open air to allow natural/wild yeast and bacteria to literally infect the beer, are spontaneous fermented beers. www.beeradvocate.com /beer/101/yeast.php   (741 words)

MBAA Convention 2003 - Oral Presentation Abstract In collaboration with the Centre for Malting and Brewing Science, she is carrying out a research project on pre-oxygenation of bottom- as well as top-fermenting yeast strains. Yeast strains were preoxygenated in a membrane loop reactor and yeast characteristics were determined during preoxygenation and fermentation. The goals of this research were to gain insight in the oxygen requirement of different yeast strains during preoxygenation and to determine the physiological state of the yeast during preoxygenation and fermentation. www.mbaa.com /meeting/2003/abstracts/O-22.html   (741 words)

The Beer Store: Types of Beer Brewed with top fermenting yeast at cellar temperature, ales are fuller-bodied, with nuances of fruit or spice and a pleasantly hoppy finish. Lager is brewed with bottom fermenting yeast at cooler temperatures for a smooth flavour. Pale golden colour, carbonated and lightly hopped, lager is a crowd-pleaser that tastes crisp and refreshing. www.thebeerstore.ca /ultimate/beer-types.html   (353 words)

BruBox :: versatile brewing system from Brupaks :: making beer at home is easy :: Each kit consists of the finest quality brewing grade malt extract, genuine top or bottom fermenting yeast and our revolutionary new BruBag system which, for the first time, enables fresh hops and grains to be used to enhance the flavour without any messy straining. Although it is acceptable to ferment this beer at room temperature, a cleaner taste will result from the genuine bottom fermenting yeast if the temperature can be held between 12°C and 16°C. Best bottled but can be served from a keg if preferred. Although Altbiers are ales, we have used a bottom fermenting yeast as this gives the beer a clean taste similar to commercial examples. www.brupaks.com /brubox   (1672 words)

MeMSoft - Beer History An ale is a beer fermented with top-fermenting yeast. This form of yeast is fermented at low temperatures (generally 41-48F -- 5-9C) and it usually takes longer. Once the yeast strains had been studied and replicated, this form of beer rose quickly in popularity. thunder.prohosting.com /~mem/html/beerhistory.html   (638 words)

Chrism Brewing Lager, which means to store, is a generic term for a beer fermented by a bottom fermenting yeast. An ale is fermented by a top fermenting yeast known as Saccharomyces cerevisiae. They are fermented at temperature closer to room temperature and take less time. www.engr.uconn.edu /~chrism/types.html   (475 words)

Glossary of Beer and Brewing Terms The top fermenting yeast perform at warmer temperatures than do yeast's used to brew lager beer, and their byproducts are more evident in taste and aroma. Fermentation - This is the process of producing alcohol and carbon dioxide through the actions of yeast on grain-based sugars. An intoxicating by-product of fermentation, which is caused by yeast acting on sugars in the malt. www.beerchurch.com /gloss.htm   (4253 words)

A Top-fermenting yeast is anaerobic and always forms a sediment on the bottom. The German word alt means old and refers to the traditional method of top fermentation. An ester produced from yeast's interaction with the malt. www.angelfire.com /pa/beerandweather/A.html   (4253 words)

rogue.com : Rogue Brews Rogue Ales are made with the finest hops and barley malt, free range coastal water and Pacman top fermenting proprietary yeast. Chris is filtered and has a crisp pilsner quality, but its part ale, since the yeast used for this recipe was Rogue's PacMan top fermenting yeast. Brewed with 4 ingredients: 100% imported malt, 100% Oregon grown Sterling Hops, a Czech pilsner yeast (not PacMan), and free-range coastal water; 12th Street is unfiltered, with a medium body and crisp hop finish. www.rogue.com /brews.html   (4253 words)

Hale's Tales What distinguishes Ale is that it is beer made with a top fermenting yeast vs Lager which is beer made with bottom fermenting yeast. But the thing I want you to remember is that this first beer was an ALE - it had a top fermenting yeast which for many generations of yeast (trillions or more) is what was used to make beer. This would be heaven to the hungry air borne yeasts as they float down and find the perfect environment to set up camp. www.halesales.com /halestales_more.html   (4253 words)

Lecture 13 • Lager is made with bottom fermenting yeast and is fermented more slowly at colder temperatures • Ale is made with top fermenting yeast and ferments at warmer temperatures more quickly • Different yeast varieties give different flavor compounds both in beer and in wine class.fst.ohio-state.edu /fst59701/lecture_13.htm   (1125 words)

Molson FAQ Ales are fermented with what are known as "top-fermenting" yeasts and lagers are made from "bottom-fermenting" yeasts. Ales are typically fermented warm (at about room temperature) with a yeast that rises to the top of the beer near the end of fermentation. At the end of fermentation lager yeast settles to the bottom of the tank where it is collected for reuse. www.molson.com /faq/brewing.php   (1030 words)

rogue.com : Rogue Brews Rogue Ales are made with the finest hops and barley malt, free range coastal water and Pacman top fermenting proprietary yeast. Brewed with Munich and Crystal 40 two-row pale malt, and dry-hopped with Horizon, Sterling and Amarillo hops, free range coastal waters, and top fermenting Pacman yeast. Chris is filtered and has a crisp pilsner quality, but its part ale, since the yeast used for this recipe was Rogue's PacMan top fermenting yeast. www.rogue.com /brews.html   (7918 words)

BridgePort - The Brewery - Ask the Brewmaster Ale yeasts are called ‘top fermenting’ because they tend to rise to the top of the tank at the end of fermentation and are separated by skimming. Lager yeasts are called ‘bottom fermenting’ because they tend to flocculate and settle to the bottom of the tank after fermentation. After primary fermentation and conditioning, the beer is pitched with fresh yeast and primed with a small amount of fermentable sugar, then racked into individual casks. www.bridgeportbrew.com /bp-brewery-faq.html   (1189 words)

The A Steam Beer A beer produced by hybrid fermentation using bottom yeast fermented at top yeast temperatures. Fermentation Lock A simple water and bubble-type device used during closed or secondary fermentation that prevents ambient air from coming in contact withj the fermenting brew. Fermentation A process in which yeast obtains energy in the absence of oxygen by breaking sugar into carbon dioxide and alcohol. www.phancypages.com /newsletter/ZNewsletter518.htm   (5374 words)

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