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jellyfish
Registered: 10/02/05
Posts: 7,457
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How fast can bacteria germinate?
#6329850 - 12/03/06 10:11 AM (17 years, 3 months ago) |
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I pressure cooked a jar of casing mix of 20 minutes to sterilize it before using and the jar fell over and got a lot of water in it. This morning when I opened up the cooker (about twelve hours since I cooked them) the jar smelt funny. I can't describe the smell maybe it's just the wet peat moss but assuming there were unkilled bacteria spores in the jar would the be able to germinate and smell that quickly?
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Civ
Pinning
Registered: 10/14/04
Posts: 2,537
Loc: California
Last seen: 8 months, 15 days
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Re: How fast can bacteria germinate? [Re: jellyfish]
#6330528 - 12/03/06 03:34 PM (17 years, 3 months ago) |
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Well pastureize your caseing mix. Sterilizing will get you problems and funk.
Just RE-COOK it if your worried about it. Or use your oven with some turkey pans on low heat, much better.
-------------------- "...Gal's seem to hate the thought of blending chicken shit in a blender. So, wash it well afterwards & DON'T tell them..." -Agar
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jellyfish
Registered: 10/02/05
Posts: 7,457
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Re: How fast can bacteria germinate? [Re: Civ]
#6331245 - 12/03/06 08:06 PM (17 years, 3 months ago) |
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How exactly can I pasterize it. Why is sterilizing bad but it's ok for casings doesn't everything die at such high temperatures.
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jellyfish
Registered: 10/02/05
Posts: 7,457
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Re: How fast can bacteria germinate? [Re: Civ]
#6331258 - 12/03/06 08:09 PM (17 years, 3 months ago) |
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How exactly can I pasterize it. Why is sterilizing bad but it's ok for cakes doesn't everything die at such high temperatures.
Edited by jellyfish (12/03/06 08:13 PM)
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Civ
Pinning
Registered: 10/14/04
Posts: 2,537
Loc: California
Last seen: 8 months, 15 days
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Re: How fast can bacteria germinate? [Re: jellyfish]
#6332060 - 12/04/06 03:15 AM (17 years, 3 months ago) |
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Turn on your oven to 185f
Wet your caseing mix, put it in a turkey pan, cover it with foil. Put it in the oven. Wait 2 hours after you get to 185f. Turn off oven. Use the mix in 6 hours after it cools some.
Grains/BRF have lotsa of sleeping spores of contams. So you have to sterilze them at high temps to fry em.
Caseing mixes don't carry a super high spore load like grains do. They are usally non-nutritive and get colonized before anything gets started. So when you pastureize the caseing mix you kill anything that is alive at the time.
-------------------- "...Gal's seem to hate the thought of blending chicken shit in a blender. So, wash it well afterwards & DON'T tell them..." -Agar
Edited by Civ (12/04/06 03:16 AM)
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liquidmycelium
Stranger
Registered: 11/29/06
Posts: 5
Last seen: 17 years, 3 months
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Re: How fast can bacteria germinate? [Re: Civ]
#6353001 - 12/10/06 12:46 AM (17 years, 3 months ago) |
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would you have a better chance of killing everything if you let the jars sit an extra 12hours after soaked and simmered before pCin or is this pointless and also would it be ok to let them sit an extra 12hours before PCin thanks liquid mycelium
-------------------- im just an ex-con tryin to go straigh and get my kids back
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RogerRabbit
Bans for Pleasure
Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 1 year, 1 month
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Re: How fast can bacteria germinate? [Re: liquidmycelium]
#6353293 - 12/10/06 06:03 AM (17 years, 3 months ago) |
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Bacteria is a beneficial organism in casing mixes and you pasteurize in order to keep them alive while killing off molds and mold spores. A sterilized casing material will allow anything that gets on it to grow. A pasteurized casing material is 'alive' and resistant to molds. This has all been written and documented well, and you'll find it with some searching.
Ovens are terrible for mycology, so I don't recommend them for anything because they dry out the material so fast and air is a poor way to transfer heat. Water works much better. You can put pre moistened casing material into jars or bags and submerge them in water in a kettle on the stove. You want the center of your field capacity casing mixture to reach a temperature of 140F to 160F for an hour to an hour and a half, but no more. Use a meat thermometer to tweak your own system. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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agar
old hand
Registered: 11/21/04
Posts: 9,056
Loc: Somewhere Else
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Re: How fast can bacteria germinate? [Re: RogerRabbit]
#6354265 - 12/10/06 02:27 PM (17 years, 3 months ago) |
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