Coldbreak Brewing Giveaway - Open to All!

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > There's Some Bad Info Going Around
Reply
 
Thread Tools
Old 01-18-2012, 09:50 PM   #91
MrManifesto
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2011
Location: Brooklyn, NY
Posts: 433
Liked 10 Times on 10 Posts
Likes Given: 4

Default

Quote:
Originally Posted by bolshoifish

Many single cell organisms, especially ones that lack strong membranes (like yeast) have a defense mechanism where they build a layer of protein/lipid around themselves to help reduce the impact of cold/dryness (otherwise the internal water pressure would cause them to burst for instance). It should come as no surprise that it might use this structure to help propagate when more optimal conditions return. Most microbiology textbooks discuss this in some detail. You might want to start there.
Ahh ok, sounds like something I'll look into. Thanks for the response.


MrManifesto is offline
 
Reply With Quote
Old 01-18-2012, 10:00 PM   #92
ChillWill
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Sheffield, South Yorkshire
Posts: 869
Liked 20 Times on 17 Posts
Likes Given: 1

Default

Quote:
Originally Posted by bolshoifish

Many single cell organisms, especially ones that lack strong membranes (like yeast) have a defense mechanism where they build a layer of protein/lipid around themselves to help reduce the impact of cold/dryness (otherwise the internal water pressure would cause them to burst for instance). It should come as no surprise that it might use this structure to help propagate when more optimal conditions return. Most microbiology textbooks discuss this in some detail. You might want to start there.
it's trehalose that is the yeast 'anti stress'. They purposely stress the yeast to produce this in the drying process to increase viability (but then they have to deal with the trehalase enzyme, but that's another topic and I'd hate to be an 'information nazi').


ChillWill is offline
Jonathanquist Likes This 
Reply With Quote
Old 01-19-2012, 12:30 AM   #93
emjay
HBT_SUPPORTER.png
Feedback Score: 1 reviews
Recipes 
 
Join Date: Jan 2011
Location: Toronto, Ontario
Posts: 12,712
Liked 1716 Times on 1604 Posts
Likes Given: 1

Default

Quote:
Originally Posted by ChillWill

it's trehalose that is the yeast 'anti stress'. They purposely stress the yeast to produce this in the drying process to increase viability (but then they have to deal with the trehalase enzyme, but that's another topic and I'd hate to be an 'information nazi').
There are many mechanisms which yeast uses to survive less-than-optimal environments.

That being said, I do always keep trehalose and glycogen in mind. And so I think it's time to add more fuel to the fire...

I cold crash my starters, and decant/pitch the starter right out of the fridge, in order to take advantage of these reserves instead of letting the yeast *waste* it while warming up. That's right - when I pitch, the temperature of the yeast is just above freezing (and the temperature of the wort is just below my desired ferm temp.)

Now that you know how I pitch my yeast... who here ****ING HATES MY GUTS?
emjay is offline
 
Reply With Quote
Old 01-19-2012, 12:46 AM   #94
ClarnoBrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: Independence, Oregon
Posts: 341
Liked 5 Times on 5 Posts
Likes Given: 2

Default

Quote:
Originally Posted by emjay View Post

Now that you know how I pitch my yeast... who here ****ING HATES MY GUTS?
I do!!!! No, not really. Although I'm sure you've irritated somebody. I've never done it this way, just assuming that the quick temperature change would be bad for the yeast. I might be confusing yeast with tropical fish...

It's always cool to learn about different techniques, especially if the info comes from someone with some info on why it works. If I like it enough, I'll give it a shot (I'm going to try pitching cold yeast), if not, I move on. Easy as that. Sharing the info is the key.
ClarnoBrewer is offline
 
Reply With Quote
Old 01-19-2012, 12:46 AM   #95
sudsmcgee
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
sudsmcgee's Avatar
Recipes 
 
Join Date: May 2010
Location: Western Chicago Burbs, IL
Posts: 1,521
Liked 49 Times on 41 Posts
Likes Given: 52

Default

Not me. I cold pitch starters as well.
sudsmcgee is offline
 
Reply With Quote
Old 01-19-2012, 12:48 AM   #96
wildwest450
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2007
Posts: 9,099
Liked 170 Times on 155 Posts
Likes Given: 4

Default

Cold pitching is nothing new, I do it on every batch.
wildwest450 is offline
 
Reply With Quote
Old 01-19-2012, 03:00 AM   #97
40watt
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
40watt's Avatar
Recipes 
 
Join Date: Mar 2011
Location: , ok
Posts: 701
Liked 73 Times on 41 Posts
Likes Given: 25

Default

I just had a blast reading all ten pages of this mess.
40watt is offline
 
Reply With Quote
Old 01-19-2012, 03:23 AM   #98
passedpawn
Waste Allocation Load Lifter - Earth Class
HBT_MODERATOR.png
Feedback Score: 1 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 21,734
Liked 4686 Times on 2803 Posts
Likes Given: 3955

Default

Quote:
Originally Posted by Hermit View Post
Now you've hurt my feelings.

I work too much. Thank god for the comedy on this forum, I think I'd melt into the overstuffed chair in front of my desk without it.
__________________
- Andrew
passedpawn is offline
Jonathanquist Likes This 
Reply With Quote
Old 01-19-2012, 03:38 AM   #99
Jonathanquist
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2011
Location: Bremerton, Washington
Posts: 109
Liked 2 Times on 2 Posts
Likes Given: 49

Default u mad bro

I personally drop potassium sorbate tablets and I get fantastic results
Jonathanquist is offline
 
Reply With Quote
Old 01-19-2012, 03:55 AM   #100
ReverseApacheMaster
Registered User
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2009
Location: Keller, Texas
Posts: 4,887
Liked 232 Times on 193 Posts

Default

When I pitch yeast I just grab a handful of the liquid out of the wyeast pouch and toss it in like I'm shooting my load.

Skeet skeet skeet!


ReverseApacheMaster is offline
Jonathanquist Likes This 
Reply With Quote
Reply


Thread Tools



Forum Jump

Newest Threads

LATEST SPONSOR DEALS