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cronicr



Registered: 08/07/11
Posts: 61,436
Loc: Van Isle
Last seen: 2 years, 1 month
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the pf tek is normally too dry for major bacterial problems
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  It doesn't matter what i think of you...all that matters is clean spawn I'm tired do me a favor
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Kizzle
Misanthrope


Registered: 08/30/11
Posts: 9,865
Last seen: 1 day, 14 hours
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Quote:
hongomagico said: pf jars dont have bacterial spores or what ? bacterial spores are more resistant than bacteria.
I believe it's because the greater density and water content allows the entire to heat up at reasonable rate. That's just my theory. For whatever reason, steaming works with them.
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hongomagico
Stranger
Registered: 12/08/13
Posts: 142
Last seen: 3 years, 1 month
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Re: pressure cooker time [Re: Kizzle]
#19256455 - 12/10/13 05:20 PM (10 years, 2 months ago) |
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i do steaming ...it is only that only for 15 minutes . and then again.. letting a day pass and then another 15 minutes of steaming.
Edited by hongomagico (12/10/13 05:21 PM)
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cronicr



Registered: 08/07/11
Posts: 61,436
Loc: Van Isle
Last seen: 2 years, 1 month
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Quote:
hongomagico said: i do steaming ...it is only that only for 15 minutes . and then again..
theres....no need...to
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  It doesn't matter what i think of you...all that matters is clean spawn I'm tired do me a favor
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hongomagico
Stranger
Registered: 12/08/13
Posts: 142
Last seen: 3 years, 1 month
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Re: pressure cooker time [Re: cronicr]
#19256467 - 12/10/13 05:22 PM (10 years, 2 months ago) |
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if theres no need how come contamination happens ?
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cronicr



Registered: 08/07/11
Posts: 61,436
Loc: Van Isle
Last seen: 2 years, 1 month
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your not doing it right
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  It doesn't matter what i think of you...all that matters is clean spawn I'm tired do me a favor
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Kizzle
Misanthrope


Registered: 08/30/11
Posts: 9,865
Last seen: 1 day, 14 hours
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Quote:
hongomagico said: if theres no need how come contamination happens ?
What kind of contamination are you talking about?
There are few contaminants that have much chance of surviving even brief exposure to boiling temperatures. Generally 'under-sterilization' will result in Bacillus spp. of bacteria. Other contaminants are usually from contamination after sterilization.
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hongomagico
Stranger
Registered: 12/08/13
Posts: 142
Last seen: 3 years, 1 month
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Re: pressure cooker time [Re: Kizzle]
#19256605 - 12/10/13 05:46 PM (10 years, 2 months ago) |
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i got black pointy bacteria sometimes..
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Kizzle
Misanthrope


Registered: 08/30/11
Posts: 9,865
Last seen: 1 day, 14 hours
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That sounds more like mold than bacteria. Most commonly it happens during the inoculation, often from contaminated spores when doing a spore inoculation but there are other ways depending on your inoculation procedure. It can also be the result of a damaged or wet filter/dry verm layer.
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FooMan



Registered: 02/02/05
Posts: 8,957
Loc: Earth
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Quote:
hongomagico said: i got black pointy bacteria sometimes..
Did you steam for a full 90 minutes? I used to only steam for 60 using the original pf tek and always got 100% success rate without a PC. Contamination can occur during inoculation or you could have had a contaminated spore syringe too. Again, there is no need for fractional sterilization, but if you want to insist on taking 2 days to sterilize your jars go for it.
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Quick WBS Prep
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