Copy Link
Add to Bookmark
Report

HOMEBREW Digest #0071

eZine's profile picture
Published in 
HOMEBREW Digest
 · 6 months ago

 
HOMEBREW Digest #71 Wed 08 February 1989

FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
Rob Gardner, Digest Coordinator

Contents:
Wort Aerating (lbr)
dryhopping (Algis R Korzonas +1 312 979 8583)
Citrus fruits in beer. (Algis R Korzonas +1 312 979 8583)
gravity and temparature (Algis R Korzonas +1 312 979 8583)

Send submissions to homebrew%hpfcmr@hplabs.hp.com
Send requests to homebrew-request%hpfcmr@hplabs.hp.com

----------------------------------------------------------------------

Date: Wed, 8 Feb 89 13:36:56 EST
From: lbr@gatech.edu
Subject: Wort Aerating

jhersh@rdrc.rip.edu writes:

> I don't think that commercial
> brewers aerate their wort to the extent that homebrewers do or rely upon
> the wort to serve as a media for yeast reproduction to the extent that
> homebrewers do.

Second part is certainly true. Homebrewers too often pitch a packet of
dry yeast (yuck!) and wait for it to build up in the wort. Pros pitch
thick slurry or actively fermenting starter. The pros may aerate less,
but I think they do aerate some (with sterile filtered air, of course).

> Anaerobic fermentation is a different process and will also result in yeast
> reproduction but to a lesser degree. I believe that the different fermentation
> pathway yields fewer of the nasty alcohol by products that aerobic
> fermentation generates.

> Much of this information has been garnered from collections of papers by
> European breweries such as BASS and Carlsberg which are present here in
> our library....

Have you read Noonan's book "Brewing Lager Beer"? It is by far the most
technical homebrew book I've seen, though of course it doesn't compare
with professional brewing literature. He indicates that some of the
products you mention, such as fusel alcohol, come from *inadequate*
aeration for the wort, and that aerobic fermentation must occur before
the anaerobic fermentation starts. Anaerobic fermentation then takes
place at a lower temperature after some of the yeast nutrients have been
depleted. He recommends high pitching rates, well in excess of what most
beginning homebrewers use, so I don't think that having enough yeast
obviates the need for oxygen.

I don't think you're right that adding a lot of yeast to oxygen-poor
wort is a good way to start fermentation, but I'm no expert. Please
send me some paper references if you get the chance. I get down
to Georgia Tech's library sometimes and they should carry major
technical journals.

Many homebrewers introduce too much oxygen after primary fermentation,
especially during racking and bottling. This is bad. But everything
I've ever read says that the yeast need oxygen when the fermentation
starts.

Postscript: Georgia Tech rejected e-mail I tried to send to rdrc.rip.edu

Len Reed
gatech!holos0!lbr

------------------------------

Date: Wed, 8 Feb 89 12:54:42 -0600
From: hplabs!uiucdcs!iwtsf!korz (Algis R Korzonas +1 312 979 8583)
Subject: dryhopping

Hello--
Regarding sanitization of hops for dry-hopping, two possible
methods come to my mind: 1) a germicidal lamp 2) steam.
Are these viable methods? I haven't used either so I can't
vouch for them.
Al.

------------------------------

Date: Wed, 8 Feb 89 13:16:11 -0600
From: hplabs!uiucdcs!iwtsf!korz (Algis R Korzonas +1 312 979 8583)
Subject: Citrus fruits in beer.

Hello again--
Here's a little bit of history regarding citrus fruits in beer:

1) Lemon slices in weizen (or weiss - wheat or "white" beer)
originated during the BR era (before refrigerators). Weizen
used to spoil more easily (maybe due to lower hopping rates)
and sour. Weizen drinkers used to put lemon in their beer
to make it drinkable. Since the invention of the refridgerator,
the tradition continues in some circles, but _TRUE_ weizen
drinkers skip the lemon (this theory was reinforced on my
trip through Bavaria last year around Faching (the German equivalent
of Mardi Gras).

2) Lime slices in Mexican beer originated when they began using
cans for distributing beer. The back room of a bar in rural
Mexico can provide plenty of dust and dirt to settle on the
top of the can. Bottles are fine - take off the cap and
pour, but what's a patron to do with the top of a can?
Hmmm, let's see... what can I use to clean off the top
of this can? How about one of these lime wedges set on the
bar for the tequilla? Yes -- this is how the limes got near
the beer, but the locals always threw the dirt-encrusted lime
away. It took a half-blitzed Madison Avenue-type to misunderstand
the lime into the beer.

Personally, I have tried only Corona, Carta Blanca, and Tecate, and
I find all of them poor excuses for beer. As we all know, 98% of
your beer is water, so, garbage-in-garbage-out.

Al.

------------------------------

Date: Wed, 8 Feb 89 13:18:54 -0600
From: hplabs!uiucdcs!iwtsf!korz (Algis R Korzonas +1 312 979 8583)
Subject: gravity and temparature

Could someone please post a formula or table for
converting specific gravity measurements at different
temperatures to specific gravity at 60 F?
Thanks.
Al.

------------------------------

End of HOMEBREW Digest

← previous
next →
loading
sending ...
New to Neperos ? Sign Up for free
download Neperos App from Google Play
install Neperos as PWA

Let's discover also

Recent Articles

Recent Comments

guest's profile picture
@guest
12 Nov 2024
It is very remarkable that the period of Atlantis’s destruction, which occurred due to earthquakes and cataclysms, coincides with what is co ...

guest's profile picture
@guest
12 Nov 2024
Plato learned the legend through his older cousin named Critias, who, in turn, had acquired information about the mythical lost continent fr ...

guest's profile picture
@guest
10 Nov 2024
الاسم : جابر حسين الناصح - السن :٤٢سنه - الموقف من التجنيد : ادي الخدمه - خبره عشرين سنه منهم عشر سنوات في كبرى الشركات بالسعوديه وعشر سنوات ...

lostcivilizations's profile picture
Lost Civilizations (@lostcivilizations)
6 Nov 2024
Thank you! I've corrected the date in the article. However, some websites list January 1980 as the date of death.

guest's profile picture
@guest
5 Nov 2024
Crespi died i april 1982, not january 1980.

guest's profile picture
@guest
4 Nov 2024
In 1955, the explorer Thor Heyerdahl managed to erect a Moai in eighteen days, with the help of twelve natives and using only logs and stone ...

guest's profile picture
@guest
4 Nov 2024
For what unknown reason did our distant ancestors dot much of the surface of the then-known lands with those large stones? Why are such cons ...

guest's profile picture
@guest
4 Nov 2024
The real pyramid mania exploded in 1830. A certain John Taylor, who had never visited them but relied on some measurements made by Colonel H ...

guest's profile picture
@guest
4 Nov 2024
Even with all the modern technologies available to us, structures like the Great Pyramid of Cheops could only be built today with immense di ...

lostcivilizations's profile picture
Lost Civilizations (@lostcivilizations)
2 Nov 2024
In Sardinia, there is a legend known as the Legend of Tirrenide. Thousands of years ago, there was a continent called Tirrenide. It was a l ...
Neperos cookies
This website uses cookies to store your preferences and improve the service. Cookies authorization will allow me and / or my partners to process personal data such as browsing behaviour.

By pressing OK you agree to the Terms of Service and acknowledge the Privacy Policy

By pressing REJECT you will be able to continue to use Neperos (like read articles or write comments) but some important cookies will not be set. This may affect certain features and functions of the platform.
OK
REJECT