Recent content by ImperialScience

It seems there is still some disagreement related to the activity of lacto - particularly its ability to attenuate wort and produce large volumes of C02. In my hands, both the strains referenced in this post appeared to be high attenuating and heterofermentive - not what i was expecting based on...

DurtyChemist, Is there any literature (or experience) to suggest that some or any strains of lacto possess feedback inhibition mechanisms that might possibly change metabolic processes as you suggest? This is very intriguing. I very much doubt that there was yeast contamination in these...

There is some extremely useful information in this thread - your comments are greatly appreciated. Hommel, your suggested experiment sounds fantastic. If you do decide to do this, adding a taste test to your timecourse numbers would be hugely informative. Given that testing cell count is labor...

Clearly pitch rate should have an influence on the behavior of both of these strains of lacto - exactly how will depend on a myriad of factors including OG, nature of wort (grain bill), temp, IBUs, and other/specific strain-related fermentation properties. What i now know is that 1 vile of WL of...

I boiled for 15 minutes, cooled to 90ish, and pitched WL straight from the tube into 2 separate full 5 gallon carboys. I had NO hop additions. This was a "see what happens and learn" experiment - i want to see how these bacteria perform in a more ideal/preferred environment. The Brevis...

Despite the fact the Delbruekii started with a bang and continues chugging away, Its PH is 4.43 vs Brevis which only started showing signs of life 3 days later (yesterday) and is at 3.47. PH readings were taken after almost exactly 4 days from pitch (3 days 22 hours). For those wanting lots of...

Well, after 3 full days the brevis started cranking. Interesting that it had soured considerably before showing any signs of activity whatsoever. WL Brevis (and delbruekii) are certainly heterofermentive. Im going to see how low in PH i can get these, and then test gravity as well.

Thanks for the quick reply and info - why didn't i think to email White labs? As of this morning the Delbruekii is still cranking (blowing off) and the Brevis is motionless. I filled both carboys to about an inch below the bottom of the neck. The Delbrueki has lost about 1/4-1/2 gallon from...

got my hands on White labs 672 (Brevis) 677 (Delbruekii) and split a batch (5 gallons each) - the one i have labeled as Delbruekii is cranking like no other blowing off for 2 days now. the other one is still. silent. nothing. Ive read conflicting things on these bacteria. Unless i mislabeled my...