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Forum: Brew Science 08-14-2014, 08:17 AM
Replies: 2
Views: 105
Posted By suregork
Esters are formed by the yeast during...

Esters are formed by the yeast during fermentation through intracellular condensation reactions between alcohols and acyl-CoA, catalysed mainly by alcohol acetyltransferases (such as the enzymes...
Forum: General Beer Discussion 06-12-2014, 12:49 PM
Replies: 35
Views: 1,887
Posted By suregork
Here is something you can try if you want to...

Here is something you can try if you want to produce a beer sample that almost certainly has diacetyl concentrations above the typical flavour thresholds. During fermentation, wort has a very low...
Forum: Fermentation & Yeast 05-23-2014, 09:33 AM
Replies: 7
Views: 444
Posted By suregork
Update to the lager yeast and Saccharomyces...

Update to the lager yeast and Saccharomyces eubayanus mystery:
http://www.sciencedirect.com/science/article/pii/S0960982214004692

Several strains of S. eubayanus have been found from the Tibetan...
Forum: Lambic & Wild Brewing 04-30-2014, 05:15 PM
Replies: 18
Views: 1,366
Posted By suregork
Here is a recent study, where up to 50 mg/L...

Here is a recent study, where up to 50 mg/L diacetyl (about 50 times what is a typical peak concentration of 'total diacetyl' (alpha-acetolactate + free diacetyl) in wort during fermentations with...
Forum: Hops Growing 04-27-2014, 02:47 PM
Replies: 4
Views: 227
Posted By suregork
Thanks for the reply. Thermal shock could be a...

Thanks for the reply. Thermal shock could be a very plausible explanation. Now I just have to hope the poor rhizomes send up some new shoots :)
Forum: Hops Growing 04-26-2014, 03:02 PM
Replies: 4
Views: 227
Posted By suregork
Withering hops - cold damage?

I ordered some rhizomes about a month ago and they arrived at my home about two weeks ago. The weather was quite cold then here in Finland, so I decided to start them in pots indoors. All rhizomes...
Forum: Lambic & Wild Brewing 04-24-2014, 06:50 PM
Replies: 18
Views: 1,366
Posted By suregork
Cantillon microbiota

Just thought I'd link to an interesting (and open access!) study that was published last week on how the microbiota of two batches of Cantillon lambic develop over a two-year period:
...
Forum: Brew Science 04-02-2014, 09:05 AM
Replies: 12
Views: 1,841
Posted By suregork
Slightly related, I stumbled upon the following...

Slightly related, I stumbled upon the following paper titled 'The influence of dry hopping on three different beer styles' in a recent Brauwelt International issue:
...
Forum: Brew Science 03-17-2014, 08:44 PM
Replies: 7
Views: 693
Posted By suregork
http://onlinelibrary.wiley.com/doi/10.1002/j.2050-...

http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.1961.tb01772.x/abstract

Here are the 125th Anniversary Reviews:...
Forum: Brew Science 12-13-2013, 09:09 PM
Replies: 10
Views: 856
Posted By suregork
Yes, but for any wort valine to inhibit the AHAS...

Yes, but for any wort valine to inhibit the AHAS enzyme, it first needs to be transported into the cell and mitochondria. The yeast cell has no specific valine transporters (rather valine is...
Forum: Brew Science 12-13-2013, 08:28 PM
Replies: 10
Views: 856
Posted By suregork
Adding valine to the wort will reduce...

Adding valine to the wort will reduce alpha-acetolactate (and consequently diacetyl) production during fermentation. Interestingly though, the absolute wort valine concentration doesn't seem to be...
Forum: Fermentation & Yeast 07-23-2013, 05:51 PM
Replies: 5
Views: 278
Posted By suregork
I successfully cultivated Conan from around 9...

I successfully cultivated Conan from around 9 month old HT (don't ask), so it is possible!
Forum: Brew Science 06-04-2013, 07:54 PM
Replies: 16
Views: 1,502
Posted By suregork
You can read the Journal of the Institute of...

You can read the Journal of the Institute of Brewing for free:
http://onlinelibrary.wiley.com/journal/10.1002/%28ISSN%292050-0416/
Forum: Fermentation & Yeast 04-26-2013, 06:24 AM
Replies: 384
Views: 73,696
Posted By suregork
Whether or not there will be any growth inside...

Whether or not there will be any growth inside the alginate beads will depend on the initial concentration of cells within it.

Just some examples that yeast growth inside alginate beads is very...
Forum: Fermentation & Yeast 04-04-2013, 07:31 PM
Replies: 16
Views: 1,996
Posted By suregork
http://beer.suregork.com/wp-content/uploads/2013/0...

http://beer.suregork.com/wp-content/uploads/2013/04/eubayanus_blond-426x600.jpg

Here is a picture of the bottled version of the beer (couldn't fit everything in the 2.5 gallon keg, so bottled...
Forum: Fermentation & Yeast 03-26-2013, 08:54 PM
Replies: 16
Views: 1,996
Posted By suregork
I only had a small taste sample as I transferred...

I only had a small taste sample as I transferred to the keg, and am now abroad, so will have to taste it again when I get back. The small taste sample I had was surprisingly clean (I was expecting a...
Forum: Fermentation & Yeast 03-22-2013, 10:59 PM
Replies: 16
Views: 1,996
Posted By suregork
Today I kegged the eubayanus beer. Gravity had...

Today I kegged the eubayanus beer. Gravity had fallen to 1.016 (67% AA), which is in line with what we had seen in the lab. Taste was surprisingly good (nothing spectacular, but definitely...
Forum: Fermentation & Yeast 03-15-2013, 02:22 PM
Replies: 27
Views: 1,279
Posted By suregork
I think it would be quite unlikely that your...

I think it would be quite unlikely that your problem is 2,3-pentanedione. First of all, some acetolactate decarboxylase can decarboxylate alpha-acetohydroxybutyrate, the precursor of 2,3-pentanedione...
Forum: Fermentation & Yeast 03-09-2013, 09:57 AM
Replies: 16
Views: 1,996
Posted By suregork
Funny this came up, as yesterday I actually...

Funny this came up, as yesterday I actually brewed (http://beer.suregork.com/?p=2867) with S. eubayanus (first homebrew ever with the yeast?). The research center I work at has the yeast in its...
Forum: Brew Science 09-26-2012, 02:32 PM
Replies: 13
Views: 1,154
Posted By suregork
Here are links to two quite recent scientific...

Here are links to two quite recent scientific articles (they should be free) regarding high gravity brewing:
http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.2007.tb00259.x/abstract...
Forum: Sponsor Showcase 09-03-2012, 04:43 PM
Replies: 240
Views: 16,025
Posted By suregork
I would like a code please :)

I would like a code please :)
Forum: Hops Growing 04-01-2011, 11:37 AM
Replies: 52
Views: 2,564
Posted By suregork
Helsinki, Finland

Helsinki, Finland
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