| Author |
Message |
    
Jim O'Conner
Advanced Member
Username: Roguejim
Post Number: 827
Registered: 06-2003
Posted From: 204.16.45.114
| | Posted on Wednesday, February 14, 2007 - 09:16 pm: | 
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I've been wondering lately how long pellet hops will keep if stored in vacuum sealed bags at freezing temp. So, I called Ralph Woodall who is Sales Director at Hop Union. His response is 2-3 years for pellets, 1-2 years for leaf. A simple test is to crush 4-5 pellets with a hammer and then rub the powder between your thumb and finger. Then use your sniffer to test for freshness. An interesting comment from Ralph was that oxidation actually increases IBUs, although it can't be measured instrumentally. The increase in bitterness will however be apparent in the final beer. Ralph talks very fast, so I am doing my best to try and remember exactly what he said regarding oxidation and IBUs. Hope some of this is useful.
Jim
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Joakim Ruud
Advanced Member
Username: Joques
Post Number: 574
Registered: 10-2005
Posted From: 84.209.8.118
| | Posted on Wednesday, February 14, 2007 - 10:46 pm: |
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Ray Daniels makes a similar point. His explanation is that as alpha acids diminish, beta acids come to the front and pick up (some of) the slack.
For to accuse requires less eloquence, such is man's nature, than to
excuse; and condemnation, than absolution, more resembles justice.
-Hobbes, Leviathan
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davidw
Senior Member
Username: Davidw
Post Number: 1706
Registered: 03-2001
Posted From: 65.163.6.62
| | Posted on Friday, February 16, 2007 - 04:10 pm: |
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Mark Garetz mentions this, too, in his book "Using Hops". As beta acids oxidize their contribution to overall bitterness (IBUs) increases. |
davidw
Senior Member
Username: Davidw
Post Number: 1707
Registered: 03-2001
Posted From: 65.163.6.62
| | Posted on Friday, February 16, 2007 - 04:15 pm: |
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However with that said, Garetz infers that the contribution from (oxidized) beta acids isn't at a level that it would make up for the bittering potential lost from the degredation of the alpha acids. |
Dan Listermann
Senior Member
Username: Listermann
Post Number: 4066
Registered: 03-2004
Posted From: 216.23.59.245
| | Posted on Friday, February 16, 2007 - 04:21 pm: |
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Speaking of Mark Garetz, what happened to him? I haven't seen anything from or about him in years.
--This space is STILL being left intentionally blank.-
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davidw
Senior Member
Username: Davidw
Post Number: 1708
Registered: 03-2001
Posted From: 65.163.6.62
| | Posted on Friday, February 16, 2007 - 04:24 pm: |
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You might be surprised, Dan!
I'll drop you an email. |
Denny Conn
Senior Member
Username: Denny
Post Number: 6182
Registered: 01-2001
Posted From: 140.211.82.4
| | Posted on Friday, February 16, 2007 - 04:48 pm: |
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Jim, good info, but I have to take exception to one point. If the IBUs are increased, they have to be measurable...that's the definition of IBUs. Now, they may not taste the same. I learned a LOT about this when I went to the beer analysis lab last week.
LIfe begins at 60...1.060, that is.
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Marlon Lang
Junior Member
Username: Marlon_lang
Post Number: 32
Registered: 12-2006
Posted From: 65.0.103.98
| | Posted on Friday, February 16, 2007 - 11:50 pm: |
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Den-Den,
Was the beer analysis trip associated with the mash hop and/or first wort hop experiments? If so, on which thread will you post the results?
Olde Man Marlon
PS Be there in July. Will call. I see Terminal Gravity IPA at Squirrels. |
KeepBrewing
Member
Username: Kb7
Post Number: 214
Registered: 05-2002
Posted From: 24.184.80.79
| | Posted on Saturday, February 17, 2007 - 12:12 am: |
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I gave my garetz book to someone but I do remember reading that some hops are better if you use them oxidized like fuggles ( correct me if I am wrong) |
Jim O'Conner
Advanced Member
Username: Roguejim
Post Number: 835
Registered: 06-2003
Posted From: 204.16.45.114
| | Posted on Saturday, February 17, 2007 - 10:18 am: |
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Marlon, I hope I'm not speaking out of turn, but I know for a fact that it is a comparison between FWHing, and 60min additions. The test is still in the works...
Jim
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Denny Conn
Senior Member
Username: Denny
Post Number: 6187
Registered: 01-2001
Posted From: 140.211.82.4
| | Posted on Monday, February 19, 2007 - 07:23 pm: |
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Jim is correct....I've sent beer to Jamil for a tasting panel there and we're doing a tasting here on the 26th. We have preliminary lab analyses and are hoping to send some samples on to another lab for more intensive testing. The results will be published in Zymurgy and if I retain the rights I'll post them somewhere online also. At this point, I really doubt the Zymurgy article will be published before June.
LIfe begins at 60...1.060, that is.
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Marlon Lang
Junior Member
Username: Marlon_lang
Post Number: 36
Registered: 12-2006
Posted From: 74.230.199.199
| | Posted on Tuesday, February 20, 2007 - 02:36 am: |
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Jim
You, sir, are absolutely right! I stand corrected. Thanks.
Olde man Marlon |
Brews and Views Archive 2007 
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