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camplo
Freedom!


Registered: 02/10/08
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Last seen: 2 years, 7 months
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Over wet gains vs LC
#21358912 - 03/03/15 11:29 PM (9 years, 2 months ago) |
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Why would over wet grains get slow growth and wet spot but LC grows fast and gets no wet spot...My first thought would be agitation from stir bar or whatever.
And again, lc recovers from stir yet, you can supposedly over shake your grains?
makes no sense.
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cronicr



Registered: 08/07/11
Posts: 61,436
Loc: Van Isle
Last seen: 2 years, 3 months
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Re: Over wet gains vs LC [Re: camplo]
#21359067 - 03/04/15 12:18 AM (9 years, 2 months ago) |
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wet grains become starchy, not an issue with lc
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hamloaf
Pork Block ®©™√


Registered: 12/23/09
Posts: 21,754
Loc: ation undisclosed.
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Re: Over wet gains vs LC [Re: camplo]
#21359620 - 03/04/15 06:36 AM (9 years, 2 months ago) |
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Quote:
camplo said: Why would over wet grains get slow growth and wet spot but LC grows fast and gets no wet spot...My first thought would be agitation from stir bar or whatever.
And again, lc recovers from stir yet, you can supposedly over shake your grains?
makes no sense.
Make perfect sense. Grains are beaten against their breaker-upper with force to cause the mycelium to break apart. Any time you bash your jars against whatever you use to break up the grain spawn with it's like you taking a bad-ass beating. Sometimes you don't recover. Spawn bags eliminate the bashing of your grain spawn, and allow for the gentle breaking apart of colonized grains spawn.
LC is gently stirred when using magnetic devices. When shaken by hand, LC can be over shook to the point of death too.
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camplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 2 years, 7 months
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Re: Over wet gains vs LC [Re: hamloaf]
#21359778 - 03/04/15 07:39 AM (9 years, 2 months ago) |
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WEll thank you for passing on the knowledge! Still seems suspect. I use home made stirrers, usually a piece of a screw....I would imagine that it gets a decent shredding. The slurry process involves blending, thats gotta be way more forceful than beating a jar against a tire. I guess the dynamics of a blender, especially with the water could be different....could be. Still interesting. Sounds like something about force impact, probably causes the cell to rupture.
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bodhisatta 
Smurf real estate agent


Registered: 04/30/13
Posts: 61,891
Loc: Milky way
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Re: Over wet gains vs LC [Re: camplo]
#21359854 - 03/04/15 07:57 AM (9 years, 2 months ago) |
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it's called shear. In breweries special pumps need to be used to move yeast slurry around from place to place so you don't destroy the cells on the inside of pumps. same goes for stir bars. this is why I always wonder about the people who blend things, but if it works it works.
sending a yeast slurry that was 1^9th cells per ml through a 1/2hp positive displacement pump can easily bring it down to 6^8th viable.
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camplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 2 years, 7 months
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Re: Over wet gains vs LC [Re: bodhisatta]
#21360041 - 03/04/15 08:51 AM (9 years, 2 months ago) |
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In that case I'm guessing a homemade stirrer is gentle enough, even a regular magnetic stirrer but a blender? even on low speed the damn thing is super fast.I'm guessing only a small percent actual hit the blade and large percent get agitated....but in all honesty it doesn't add up, Shaking a jar of grain or lc too hard equals death but stick it in a blender and its all good. Somehow a blender must be less impact.
I wonder has anyone ever let a slurry sit in a jar to see how it recolonized. AS well I cannot find any info on anyone how has tried to colonize grain submerge in water.
I'll have to experiment myself but much rather learn from someone else's experience.
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