Where does yeast come from?

Share your experiences of using brewing yeast.
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ukmike99

Where does yeast come from?

Post by ukmike99 » Tue Jan 15, 2008 12:17 am

I presume its a "useful" mould like penicillin,but is that all their is to our good friend.
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Aleman
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Post by Aleman » Tue Jan 15, 2008 12:37 am

Basically its a single celled fungus. Prevalent everywhere, but abundant on fruit. Brewing yeast (Saccharomyces cerevisiae sp??) has been selected over a long period of time for its resistance to alcohol etc, but was originally derived from 'bread' yeasts.

IIRC a lot of work was done in the 19th century at the Carlsberg institute in Denmark, but that may have been on yeast taxonomy (identification). Most brewing is done with single strains (some breweries like Ringwood, use multiple strains), but some still use the local yeast population in the air around the brewery Belgian trappist beers come to mind.
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Jrevillug

Post by Jrevillug » Tue Jan 15, 2008 12:49 am

Mars

EDIT- I seem to recall an article in New Scientist that covered the Yeast Plants used for making Ginger Beer- the really traditional stuff.

The Yeast and a particular strain of bacteria co-existed in most of these plants, and were mutually beneficial- each using the other's waste products, IIRC.
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steve_flack

Post by steve_flack » Tue Jan 15, 2008 9:28 am

Aleman wrote:but some still use the local yeast population in the air around the brewery Belgian trappist beers come to mind.
Not sure any of the Belgian Trappist use the spontaneous fermentation method although Orval does deliberately add Brett at bottling. I think you're thinking more of the Lambic brewers.
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Aleman
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Post by Aleman » Tue Jan 15, 2008 9:32 am

steve_flack wrote:
Aleman wrote:but some still use the local yeast population in the air around the brewery Belgian trappist beers come to mind.
Not sure any of the Belgian Trappist use the spontaneous fermentation method although Orval does deliberately add Brett at bottling. I think you're thinking more of the Lambic brewers.
Sorry Steve, They all taste the same to me :P :wall
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steve_flack

Post by steve_flack » Tue Jan 15, 2008 9:36 am

The Gods work obviously pays well as most of the pictures I've seen of the Trappists' breweries have more shiny in them than Vossy's place.
Sorry Steve, They all taste the same to me
Sadly so does most of the bitter in 90% of pubs - unpleasant bordering on the awful.
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oblivious

Post by oblivious » Tue Jan 15, 2008 9:49 am

steve_flack wrote:The Gods work obviously pays well as most of the pictures I've seen of the Trappists' breweries have more shiny in them than Vossy's place.
All that polishing keeps there minds of carnal thoughts :D
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steve_flack

Post by steve_flack » Tue Jan 15, 2008 10:01 am

OMFG

Nice picture though... :wink:
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ukmike99

Post by ukmike99 » Tue Jan 15, 2008 11:54 am

I don`t think I`ll ever recover from the image that creates :shock:
It`s too early to have a pint as well :cry:
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CyberPaddy66

Post by CyberPaddy66 » Tue Jan 15, 2008 2:36 pm

That left a bad taste in my mouth :shock: even coffee doesn't work!
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RabMaxwell

Post by RabMaxwell » Tue Jan 15, 2008 10:25 pm

I have seen that article before & when i started reading the posts i said to myself i bet some perve will bring up vaginal yeast then i noticed you beat me to it Daab
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Beatnik69

Post by Beatnik69 » Tue Jan 15, 2008 10:40 pm

When a mummy yeast and a daddy yeast love each other very much... :lol:
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Garth
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Post by Garth » Tue Jan 15, 2008 11:37 pm

well, I think the moral of the story is...

........don't fanny around with your beer..



sorry couldn't help it.... :wink:
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