Slanting yeast - Page 29 - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Slanting yeast

Reply
 
Thread Tools
Old 09-25-2011, 12:08 AM   #281
el_caro
Recipes 
 
Feb 2011
, Australia
Posts: 607
Liked 33 Times on 28 Posts


I bought an 8Litre one and wow do we love it. Gets use every week for beautiful stews, soups, etc and I always have it on hand for yeast storage activities. One of the best homeware decisions I have ever made.

 
Reply With Quote
Old 09-25-2011, 09:19 PM   #282
laversmp
Recipes 
 
Sep 2011
Montana, Oregon
Posts: 42

New Brewer here, what is the benefit here, i.e money, yeast strains etc.?

 
Reply With Quote
Old 09-26-2011, 12:13 AM   #283
ekjohns
Recipes 
 
May 2009
IL
Posts: 1,403
Liked 22 Times on 20 Posts


Money. By the time you step up to pitching amounts you have super fresh liquid yeast for about $3

 
Reply With Quote
Old 09-26-2011, 08:41 AM   #284
Clementine
Recipes 
 
May 2011
Waynesboro, PA
Posts: 545
Liked 12 Times on 12 Posts


As above cheapest freshest yeast you can get. Can my wort left over from dead space mlt and kettle so the yeast is practically free after inital investment. Another benefit is no more dead yeast due to hot weather.

Clem

 
Reply With Quote
Old 10-08-2011, 02:40 AM   #285
MTEXX
Recipes 
 
Oct 2009
Charlotte, NC
Posts: 35

Folks are heralding Fermcap-S (dimethylpolysiloxane) for reducing the foam on starters and primary fermentation for reducing boilovers in the BK.

Does anyone have experience with reducing boilover in the autoclave by using Fermcap? Also, does it "denature" during autoclave? Would it double-duty once in a starter?

 
Reply With Quote
Old 10-08-2011, 02:59 PM   #286
ChemEMc
 
ChemEMc's Avatar
Recipes 
 
Oct 2009
Richmond
Posts: 116
Liked 4 Times on 4 Posts


From my use of it (just starters) I think it would work in the autoclave, but yes, it appears to denature, even in the normal boil. i know if i add more DME to a starter after it has been boiling even with fermcap, it will boil over if i do not add more fermcap.

Wish i had more exact chemistry answers, but haven't looked anything up, just some observations from my use.

Edit: to clarify, i think it would do it's job in the autoclave, but not *necessarily* double duty in the starter. Would be interested to know, may have to try.

 
Reply With Quote
Old 10-08-2011, 03:51 PM   #287
windbreaker123
Recipes 
 
Mar 2011
bfe, oh
Posts: 270
Liked 5 Times on 5 Posts


if you have a boil over in a autoclave that is a seal issue. Fem cap will denature if you want to use the water for a starter you will need to add it. Though I do not see why you would. Unless your container is to small.

 
Reply With Quote
Old 10-08-2011, 04:37 PM   #288
ChemEMc
 
ChemEMc's Avatar
Recipes 
 
Oct 2009
Richmond
Posts: 116
Liked 4 Times on 4 Posts


i'm assuming he means to pressure cook jars of either wort or a mix of water and DME, so he has ready made sterile wort on hand. Though if that is the case then you don't need to boil it for a starter... so yeah, now i'm not sure the purpose. But canning jars allow hopefully just gas to escape the jars, but if it were to boil over then the wort could escape as well, the seal is not at fault, that is simply how it works, the lids are not supposed to be on so tight that material cannot escape or they will not work. In actually there may not be a boil over problem because the whole system is pressurized, but i have not pressuredcooked wort to know.

 
Reply With Quote
Old 10-08-2011, 06:13 PM   #289
ChemEMc
 
ChemEMc's Avatar
Recipes 
 
Oct 2009
Richmond
Posts: 116
Liked 4 Times on 4 Posts


From what i can find it looks like the fermcap/PDMS stays more or less at the interface of the wort/air, and is generally left behind when transferring the wort, due to sticking to surfaces or particles in the trub left behind. it may be when adding more dme to the mix the fermcap adheres to the dme particles and that disrupts its anti-foaming quailities. This may or may not be temporary if the particles of dme/pdms settle out or if they bind permanently and thus stop the anti-foam action.

So, there should not be any actual "denaturing" or chemical breakdown at the temperatures used for brewing, and if the wort is autoclaved and boiled in the same container without any transfers it may continue to work, or it may have had time to bind with other compounds in the beer and be useless.

 
Reply With Quote
Old 10-09-2011, 08:55 PM   #290
storunner13
Recipes 
 
Jan 2010
Minneapolis, Minnesota
Posts: 547
Liked 6 Times on 6 Posts


If Sacc is still lurking this thread (or anyone else has tried it)...

Did you ever get around to culturing any Bug Blends? Agar/Dextrose media either by slants, or separating the strains on plates? If so, how did you make starters?

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ethyl Alcohol Replacement for Slanting?? enderwig General Techniques 8 08-12-2014 06:09 PM
Washing yeast, starters, pre-made wort, all kinds of yeast Q's 98EXL General Techniques 15 09-06-2011 05:55 PM
Frozen Yeast Bank vs. Yeast Slanting shortyjacobs Fermentation & Yeast 11 09-24-2010 07:13 PM
WL East Coast Ale Yeast - Who has a good all grain recipe for this yeast? Griffsta Recipes/Ingredients 7 05-16-2009 09:12 PM
Made two batches, one with huge yeast slurry, and one with dry Safale-04 yeast. Jolly McStanson General Beer Discussion 4 03-07-2009 08:23 PM


Forum Jump