Search results

I appreciate the great information WoodlandBrew. I found Malowicki's thesis, and Jaskula's paper. I'll read through both of them, as well as some of the other references you mentioned. I may just be thinking too much into it. I am a chemist by trade with free reign on most analytical...

I feel like this should be a relatively simple issue, but I can't seem to find a definitive answer. I'm looking to do a hop stand on a beer I'm formulating. From what I've read I'm seeing values somewhere between 10-15% hop utilization, or being equivalent to X minute boil. All of these...

Wow thank you. I tried this once, and failed. For whatever reason, Chem majors don't have to take much calculus. I tried to do this exact thing once, and failed miserably. I really should have just tossed it into mathcad or something and let it do the work. I am positive I made some stupid...

Just a personal experience, but I find more chemistry professors, grad students, and people otherwise related to the department are homebrewers. Plus it's a superior science :) You can learn other cool hobbies, like firework manufacture too. Not that I'm a chemist and licensed firework...

It might just be aging and conditioning, but I've aged out diacetyl from my beers. It's certainly not as fast or efficient as a couple day diacetyl rest with bulk beer. It might just be because the yeast is already somewhat dormant in the bottles and thus takes longer. It probably took the...

They've been having a massive user overload with it's release, probably due to how cool it is. Hopefully we can play with it and see it's full potential in a week or so.

If you do try NMR, I can help you out a bit. The hydrogens directly next to the carbonyl on the relevent sidechain are the ones I'd look at. Humulone will exhibit a ddqq pattern, with a big geminal splitting (16-18Hz). One of the doublets may go to an AB quartet depending on how much the...

With some NMR skill, it should be easy to tell the components apart, but I don't know how much they'd pile up in a mixture. I'd just extract the hops with a non-polar solvent such as hexane, and run a liquid chromatography column on it. This should at least yield a crude separation. The...

The differing conditioning temperatures brings up some interesting issues. It would partially depend on whether or not you rack before lagering. This would remove the CO2 rich atmosphere above the beer. Even with a pure CO2 layer and a gallon of head space, and assuming it absorbs all of this...