Copy Link
Add to Bookmark
Report
HOMEBREW Digest #5298
HOMEBREW Digest #5298 Fri 22 February 2008
FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
Digest Janitor: pbabcock at hbd.org
***************************************************************
THIS YEAR'S HOME BREW DIGEST BROUGHT TO YOU BY:
Your Business Name Here
Visit http://hbd.org "Sponsor the HBD" to find out how!
Support those who support you! Visit our sponsor's site!
********** Also visit http://hbd.org/hbdsponsors.html *********
DONATE to the Home Brew Digest. Home Brew Digest, Inc. is a
501(c)3 not-for-profit organization under IRS rules (see the
FAQ at http://hbd.org for details of this status). Donations
can be made by check to Home Brew Digest mailed to:
HBD Server Fund
PO Box 871309
Canton Township, MI 48187-6309
or by paypal to address serverfund@hbd.org. DONATIONS of $250
or more will be provided with receipts. SPOSORSHIPS of any
amount are considered paid advertisement, and may be deductible
under IRS rules as a bsuiness expense. Please consult with your
tax professional, then see http://hbd.org for available
sponsorship opportunities.
***************************************************************
Contents:
Judge points for delinquent competition organizer reports ("David Houseman")
oxygen and fatty acids and sterols for dummies ("Matt Wallace")
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* The HBD Logo Store is now open! *
* http://www.hbd.org/store.html *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Suppport this service: http://hbd.org/donate.shtml *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Beer is our obsession and we're late for therapy! *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Send articles for __publication_only__ to post@hbd.org
If your e-mail account is being deleted, please unsubscribe first!!
To SUBSCRIBE or UNSUBSCRIBE send an e-mail message with the word
"subscribe" or "unsubscribe" to request@hbd.org FROM THE E-MAIL
ACCOUNT YOU WISH TO HAVE SUBSCRIBED OR UNSUBSCRIBED!!!**
IF YOU HAVE SPAM-PROOFED your e-mail address, you cannot subscribe to
the digest as we cannot reach you. We will not correct your address
for the automation - that's your job.
HAVING TROUBLE posting, subscribing or unsusubscribing? See the HBD FAQ at
http://hbd.org.
LOOKING TO BUY OR SELL USED EQUIPMENT? Please do not post about it here. Go
instead to http://homebrewfleamarket.com and post a free ad there.
The HBD is a copyrighted document. The compilation is copyright
HBD.ORG. Individual postings are copyright by their authors. ASK
before reproducing and you'll rarely have trouble. Digest content
cannot be reproduced by any means for sale or profit.
More information is available by sending the word "info" to
req@hbd.org or read the HBD FAQ at http://hbd.org.
JANITORs on duty: Pat Babcock (pbabcock at hbd dot org), Jason Henning,
and Spencer Thomas
----------------------------------------------------------------------
Date: Fri, 22 Feb 2008 12:46:56 -0500
From: "David Houseman" <david.houseman at verizon.net>
Subject: Judge points for delinquent competition organizer reports
Will the judges and stewards who participated in the following competitions,
and who expect to earn any credit for doing so, please contact the
organizers and encourage them to file the delinquent organizer reports. No
credit will be awarded and these competitions will not be sanctioned again
until these are filled.
12/08/2007 200489 93.7 BOB FM's Colonial Home Brewing contest Norfolk,
VA Donna Agresto Seavey (757) 222-2908 eventproducers at hotmail.com
09/22/2007 200458 Michigan Renaissance Festival Homebrew Competition
Holly, MI richard hopman (248) 674-4677 hopmans at sbcglobal.net
07/28/2007 200434 NYS Craft Brewers Competition Syracuse, NY Tim
Butler (315) 475-2337 tim at empirebrew.com
10/21/2006 200199 Devil's Thumb Home Brew Festival Petersburg, AK
Petersburg Chamber of Commerce (907) 772-3646 nancy at vikingtrvl.net
David Houseman
BJCP Competition Director
------------------------------
Date: Fri, 22 Feb 2008 13:18:32 -0800
From: "Matt Wallace" <dubious.chewy at gmail.com>
Subject: oxygen and fatty acids and sterols for dummies
I'm interested in ways to give yeast everything they need to brew very high
gravity beers. I recently read on another forum about the possibility of
adding small amounts of olive oil to the wort in place of
aeration/oxygenation. I went ahead and tried it this past weekend by adding
about half a drop to the yeast slurry before pitching in an OG 1.112 brew.
Needless to say, I hadn't checked the HBD archive on the subject, and I've
just now finished up reading the very detailed discussion from last summer.
Now, I ain't no biochemist...in fact, homebrewing is arguably the most
technical subject I study. That said, my non-technical takeaway from the
discussion is the following:
-Sterols are generally the major limiting factor in yeast growth, and oil
doesn't provide them in any significant amount.
-There is evidence to suggest that providing yeast with "free fatty acids"
can result in enhanced yeast growth and attenuation.
-a good way to give those free fatty acids to your yeast is to add a small
amount of saponified flax or olive oil, i.e. soap.
Now, my current batch is chugging along just fine, and doesn't seem to be
headed for a stuck fermentation (I used my regular aeration technique of
pouring from the kettle into the fermenter and shaking, plus I had a healthy
starter). But I am still curious if there are practical ways for the
homebrewer to cheat the substantial oxygen requirements of very high gravity
beers- I don't have an oxygenation system, and I've heard it said that
aeration just doesn't cut it once you get above 1.080.
So, one option seems to be to add a tiny amount of pure oil soap to provide
the yeast with some fatty acids they normally need oxygen to produce.
But what about sterols? Is there a common household source for them?
Again, this is a liberal-arts guy speaking, but I wonder if yeast's high
sterol-FA ratio goes for other fungi as well...could adding a pinch of dried
mushroom do the trick?
-Matt in Portland
------------------------------
End of HOMEBREW Digest #5298, 02/22/08
*************************************
-------
