Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Brew Science > Brew with freshly harvested hops?
Reply
 
LinkBack Thread Tools
Old 04-04-2012, 09:35 PM   #11
afr0byte
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Vermont
Posts: 1,409
Liked 70 Times on 59 Posts
Likes Given: 48

Default

You could always make some wort and split it up equally amongst however many hop varieties you have + a commericial hop with a known AA%. Then you can compare the relative bitterness given a constant weight of each hop variety. In the end, it's all about the perceived bitterness more so than an actual IBU number.

__________________
afr0byte is offline
 
Reply With Quote Quick reply to this message
Old 04-04-2012, 10:58 PM   #12
sweetcell
Swollen Member
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
sweetcell's Avatar
Recipes 
 
Join Date: Jan 2012
Location: Rockville, MD
Posts: 4,057
Liked 651 Times on 484 Posts
Likes Given: 254

Default

Quote:
Originally Posted by cheezydemon3 View Post
.....I am surprised the old "OK for aroma, DO NOT use for bittering" hasn't come out. it is impossible to calculate IBU's.
you can't determine with absolute certainty what the AA% is (unless you have it lab tested). you can, however, come up with a decent estimate. check out the speadsheet in my sig, it has AA% ranges for each hop variety. chances are good anything you grow will be within that range. so you might not know if your chinook is 10% or 14% but you can estimate it to be 12% and work with that. it'll get you in the ball-park. if you're a hop-head go heavier than the estimate indicates, if you're not into heavy bitterness/favor/aroma go lighter. done and done.

Quote:
Originally Posted by cheezydemon3 View Post
If you like exact specifications and obsessive notes, DON'T GROW HOPS.
true dat. well said. gotta be ready to roll with the surprises.

isn't brewing wonderful?
__________________
.
What hops should I grow? Hop grower's comparison table. Looking for cheap honey?

Drinking: a farmhouse with ECY08 & brett blend
Fermenting: wet-hopped harvest ale x 2, sour cherry mead, imperial chocolate stout and its not-so-small second runnings beer
Aging: oud bruin & a few other sours, acerglyn, a BDSA
sweetcell is offline
 
Reply With Quote Quick reply to this message
Old 04-04-2012, 11:15 PM   #13
david_42
Feedback Score: 0 reviews
 
david_42's Avatar
Recipes 
 
Join Date: Oct 2005
Location: Willamina & Oak Grove, Oregon, USA
Posts: 25,651
Liked 134 Times on 127 Posts

Default

Fresh (wet) hop ales are a Fall celebration up here. 5-6 times as much by weight is the zone.

My first year I made an All Hops ale. Wasn't enough of anything to make more than one batch. Since 50% of the harvest was from Cascade, it was a Pale.

Hint: keep some back for 'dry' hopping. Stick them in your freezer in a bag and add them a couple days before bottling. There are very light oils that would be driven off by the drying process. They make the aroma special.

__________________

Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

"I would like to die on Mars, just not on impact." Elon Musk

david_42 is offline
 
Reply With Quote Quick reply to this message
Old 04-04-2012, 11:18 PM   #14
Stauffbier
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
Stauffbier's Avatar
Recipes 
 
Join Date: Nov 2011
Location: El Paso, TX
Posts: 5,067
Liked 1013 Times on 622 Posts
Likes Given: 2683

Default

Sweetcell.. Thanks for the comparison table!

David 42, so just to make sure I understand... You're freezing "wet" hops for "dry" hoping? The freezing doesn't turn them to mush??

__________________
Bier war sein letztes wort dann trugen ihn die Englein fort...

Stauffbier is offline
 
Reply With Quote Quick reply to this message
Old 04-05-2012, 03:52 AM   #15
Beardsly
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2011
Location: Lexington, Kentucky
Posts: 45
Default

Awesome. You guys kick ass.

__________________
Beardsly is offline
 
Reply With Quote Quick reply to this message
Old 04-05-2012, 01:04 PM   #16
jagec
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2010
Location: Baltimore, MD
Posts: 105
Liked 11 Times on 11 Posts

Default

Quote:
Originally Posted by cheezydemon3 View Post
.....I am surprised the old "OK for aroma, DO NOT use for bittering" hasn't come out. it is impossible to calculate IBU's.
Not true if you have a spec and some run-of-the-mill solvents.
__________________
jagec is offline
 
Reply With Quote Quick reply to this message
Old 04-05-2012, 02:13 PM   #17
Beardsly
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2011
Location: Lexington, Kentucky
Posts: 45
Default

Tell me more about these solvents, because I might have access to a spectrometer due to my occupation as a biology student.

Got a method?

__________________
Beardsly is offline
 
Reply With Quote Quick reply to this message
Old 04-06-2012, 02:32 PM   #18
jagec
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2010
Location: Baltimore, MD
Posts: 105
Liked 11 Times on 11 Posts

Default

Quote:
Originally Posted by Beardsly View Post
Tell me more about these solvents, because I might have access to a spectrometer due to my occupation as a biology student.

Got a method?
Alpha and Beta Acids in Hops
(reference: ASBC MoA. 8th edition, 1992)
Method
1. Place 5.000 +/- .001 gr pulverized hops in an extraction bottle and add 100 mL toluene.
2. Shake for 30 min with vigorous agitation.
3. Let stand until clear or centrifuge (preferred).
4. Dilution A: Dilute 5.0 ml of this extract to 100 mL with methanol.
5. Dilution B: Dilute an aliquot of the dilution A with alkaline methanol (0.2 mL 6M NaOH per 100 mL MeOH) so that the Abs at 325 and 355 falls within the most accurate range of the instrument (usually between 0.1 and 1)
6. Immediately read dilution B (1 cm) at 275, 325 and 355 vs a toluene blank that was prepared and diluted in EXACTLY the same manner.
Notes:
? Hexane may be substituted for toluene
Calculations:
Dilution factor, d= (volume dil A x volume dil B)/ (500 x aliq extract A x aliq dil A)
% alpha acids= d x (-51.56 A355+ 73.79 A325-19.07 A275)
% beta acids= d x (55.57 A355-47.59 A325 + 5.10 A275)
Example:
1. 5 gr hops extracted with 10 mL toluene
2. 5 mL clear extract diluted to 100 mL with methanol=Dilution A
3. 3 mL Dilution A diluted to 50 mL with alkaline methanol
4. Absorbances
o A355=0.615
o A325= 0.596
o A275=0.132
d = (100 x 50) / (500 x 5 x 3) = 0.667
alpha = 0.667 x [ -(51.56 x 0.615) + (73.79 x 0.596) - (19.07 x 0.132) = 6.5
beta = 0.667 x [ (55.57 x 0.615) - (47.59 x 0.596) + (5.10 x 0.132) = 4.3
__________________
jagec is offline
 
Reply With Quote Quick reply to this message
Old 04-07-2012, 05:51 AM   #19
Beardsly
Feedback Score: 0 reviews
Recipes 
 
Join Date: Sep 2011
Location: Lexington, Kentucky
Posts: 45
Default

Jagec you are wonderful. That's going in my brew reference book once I get my typewriter working again.

__________________
Beardsly is offline
 
Reply With Quote Quick reply to this message
Old 04-18-2012, 01:07 PM   #20
smackett
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2012
Location: Fulton, Il
Posts: 17
Liked 1 Times on 1 Posts

Default

If you plan on storing them they should be dried. I did this with a dehydrator on the lowest setting. Worked great and trasted great.

__________________
smackett is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools