Author Topic: Youtube Video of Starter -- With Dry Yeast?  (Read 2854 times)

jaybeerman

  • Guest
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #15 on: March 20, 2011, 05:23:15 PM »
I disagree, Drew.  The purpose of the video is to promote what we all know is a poor brewing practice...making a starter with dry yeast.  I've emailed the powers that be asking them to remove it.  Cranky?  Perhaps. 

Yeah, but the guy is quite fashionable, nicely dressed (did you not see the goggles?), and there's a catchy soundtrack; surely you can forgive a little misinformation  ::)

Offline weithman5

  • Senior Brewmaster
  • ******
  • Posts: 1681
  • naperville, il
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #16 on: March 20, 2011, 06:19:04 PM »
.  not necessary with dry yeast to make a

would you split up the dry yeast? I'm considering a scale that could do that kind of measurement anyway.



we'll see how it works.  i just brewed (i brew 1 gallonish batches)  used about 1/3 of the package, then 1/3 in a cider (again 1gal)  the remaining 1/3 i am going to make a starter from and then save this starter as a slurry for the next few batches (probably divide again and make a few batches)
Don AHA member

Offline punatic

  • Official Poobah of No Life.
  • *
  • Posts: 4583
  • Puna District, Hawaii Island (UTC -10)
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #17 on: March 20, 2011, 07:30:09 PM »
Old laboratory adage:

"A watched flask never boils."
There is only one success: to be able to spend your life in your own way.


AHA Life Member #33907

Offline euge

  • I must live here
  • **********
  • Posts: 7593
  • Estilo Casero
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #18 on: March 20, 2011, 07:48:55 PM »
Old laboratory adage:

"A watched flask never boils-over."

There. Fixed it for ya!
The first principle is that you must not fool yourself, and you are the easiest person to fool. -Richard P. Feynman

Be Sure To Vote Jonathan Fuller for Governing Committee!

Offline punatic

  • Official Poobah of No Life.
  • *
  • Posts: 4583
  • Puna District, Hawaii Island (UTC -10)
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #19 on: March 20, 2011, 08:07:40 PM »
It's gotta boil before it will boil-over.
There is only one success: to be able to spend your life in your own way.


AHA Life Member #33907

Offline gimmeales

  • Assistant Brewer
  • ***
  • Posts: 166
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #20 on: March 23, 2011, 03:45:39 PM »
Sooooo close!  If only he'd used a smack pack or tube of yeast I think most of us would forgive the airlock faux pas.  I'm on the fence - agree with Drew's point because of the production quality (and the process will produce fine beer), but Denny makes a point that resonates with me (because he's right about established best-practices)

There's only one place this will be resolved - THE OCTAGON!


p.s  I also agree that table rules!





Offline bluesman

  • Global Moderator
  • I must live here
  • *****
  • Posts: 8808
  • Delaware
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #21 on: March 23, 2011, 05:22:14 PM »
Well done!

....again I'll reiterate...except for the dry yeast and air-lock. I also don't think it's necessary to sanitize the flask prior to boiling as the boiling process will properly sanitize the flask.
Ron Price

Offline punatic

  • Official Poobah of No Life.
  • *
  • Posts: 4583
  • Puna District, Hawaii Island (UTC -10)
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #22 on: March 23, 2011, 11:58:45 PM »
Is there a problem with using an airlock on a yeast starter?
There is only one success: to be able to spend your life in your own way.


AHA Life Member #33907

Offline tschmidlin

  • I must live here
  • **********
  • Posts: 8195
  • Redmond, WA
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #23 on: March 24, 2011, 12:16:59 AM »
Is there a problem with using an airlock on a yeast starter?
Not a problem per se, but it will inhibit yeast growth.  You want some air flow in to get some extra O2 for the yeast to build cell walls.  Foil or a foam stopper is good enough to allow air flow while keeping out bugs and dust.
Tom Schmidlin

Offline punatic

  • Official Poobah of No Life.
  • *
  • Posts: 4583
  • Puna District, Hawaii Island (UTC -10)
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #24 on: March 24, 2011, 12:30:42 AM »
Dang, I've been doin it wrong for 22 years.   How much of an air exchange do you suppose you get through a foil cap or foam stopper? 

Positive pressure created by the generation of a heavier than air gas in a confined space, I think it's a one way flow - CO2 pushing outward.
There is only one success: to be able to spend your life in your own way.


AHA Life Member #33907

Offline tschmidlin

  • I must live here
  • **********
  • Posts: 8195
  • Redmond, WA
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #25 on: March 24, 2011, 01:24:34 AM »
Yeah you'd think so, but the O2 flows because of the O2 gradient.  Weird eh? :)

Tom Schmidlin

Offline hopfenundmalz

  • Official Poobah of No Life.
  • *
  • Posts: 6035
  • Milford, MI
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #26 on: March 24, 2011, 05:58:29 AM »
Dang, I've been doin it wrong for 22 years.   How much of an air exchange do you suppose you get through a foil cap or foam stopper? 

Positive pressure created by the generation of a heavier than air gas in a confined space, I think it's a one way flow - CO2 pushing outward.

Partial pressure is what you have to think about.  The O2 will go in due to the higher partial pressure of O2 on the outside like Tom says.  Sierra Nevada went away from the twistoffs to the O2 barrier caps.  The beer was not going flat, but O2 was getting in past the seal.  Counterintuitive.
Jeff Rankert
Ann Arbor Brewers Guild, AHA Member, BJCP Certified
Home-brewing, not just a hobby, it is a lifestyle!

Offline punatic

  • Official Poobah of No Life.
  • *
  • Posts: 4583
  • Puna District, Hawaii Island (UTC -10)
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #27 on: March 24, 2011, 06:18:52 AM »
I'm guessing that the model for this idea is the same as the one for how bottles of crown-capped beer becomes oxidized over time?

Ah, it is.  hopfenundmalz posted while I was writing this.

I think that model is incorrect because it is based on a static interface between the confined space in the container and the atmosphere.  The interface between the starter's confined space and the atmosphere is dynamic due to the generation of CO2 by fermentation.

Picture the O2 molecules as salmon trying to swim upstream against the current in a river of CO2.
There is only one success: to be able to spend your life in your own way.


AHA Life Member #33907

Offline majorvices

  • Global Moderator
  • I must live here
  • *****
  • Posts: 7877
  • Polka. If its too loud you're too young.
    • View Profile
    • Yellowhammer Brewing Company
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #28 on: March 24, 2011, 06:21:29 AM »
Regardless of whether or not o2 can get in under the foil, only wankers use airlocks on starters. Know that.  :P
Keith Y.

Vote Jonathan Fuller for Governing Committee!

Offline narvin

  • Senior Brewmaster
  • ******
  • Posts: 1376
  • Baltimore
    • View Profile
Re: Youtube Video of Starter -- With Dry Yeast?
« Reply #29 on: March 24, 2011, 06:29:38 AM »
I'm guessing that the model for this idea is the same as the one for how bottles of crown-capped beer becomes oxidized over time?

Ah, it is.  hopfenundmalz posted while I was writing this.

I think that model is incorrect because it is based on a static interface between the confined space in the container and the atmosphere.  The interface between the starter's confined space and the atmosphere is dynamic due to the generation of CO2 by fermentation.

Picture the O2 molecules as salmon trying to swim upstream against the current in a river of CO2.

That's why you shake it every time you walk by, or use a stir plate.  The agitation is going to get some O2 in there. 
Please do not reply if your an evil alien!
Thanks
Chris S.