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hamloaf
Pork Block



Registered: 12/23/09
Posts: 20,347
Loc: Oklahoma.
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Pink Mold; Red Bread Mold – Neurospora Q/A
#12158893 - 03/07/10 12:34 PM (13 years, 11 months ago) |
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Commonly to occasionally seen on agar and grain. Neurospora is fast growing, sometimes taking only 24 four hours to totally colonize a media filled petri dish. It is ubiquitous in nature, occurring on dung, in soils and on decaying plant matter. Since this fungus grows through cotton stoppers or filter discs, a single contaminated jar, though sealed, can spread spores to adjacent spawn jars within the laboratory. This condition is more likely if the filter discs or cotton plugs are the least bit damp; or if the external humidity is high. Furthermore, Neurospora spores germinate more readily at elevated temperatures. The pink mold seen in mushroom culture is most frequently Neurospora sitophila, a pernicious contaminant that is difficult to eliminate. All infected cultures should be removed as soon as possible from the laboratory and destroyed. A thorough cleaning of the laboratory is absolutely necessary. If contamination persists, remove all spawn and start anew.
Does this contaminate find its way in sealed jars and/or bags? Is it already on present on grain after sterilization and due to the higher temperatures, encouraged?
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Crushed
Sober Enough


Registered: 02/18/10
Posts: 96
Loc: Southwest
Last seen: 12 years, 6 months
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Re: Pink Mold; Red Bread Mold – Neurospora Q/A [Re: hamloaf]
#12159101 - 03/07/10 01:16 PM (13 years, 11 months ago) |
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It will be killed when you sterilize. It should not be in sealed bags or jars, but if these "sealed" items have filter patches that get damp, then that is apparently a potential contamination problem.
When it says higher temperatures, think warm. 80+, not 212+. There are only a handful of organisms in the world that can survive proper sterilization, and I doubt any are a concern for the home mycologist.
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In theory, there is no difference between theory and practice. In practice, there is.
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hamloaf
Pork Block



Registered: 12/23/09
Posts: 20,347
Loc: Oklahoma.
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Re: Pink Mold; Red Bread Mold – Neurospora Q/A [Re: Crushed]
#12162960 - 03/08/10 04:08 AM (13 years, 11 months ago) |
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Not 212+? That's a load off. I was having trouble getting my incubator to 212+. I am thinking 78-80 degrees ferinheight because mycelium generates(has a body temperature of) one degree. You said that their are only a handful of organisms in the world that can survive proper sterilization and you doubt they are(1 hour at 15psi or 250 degrees, ferinheight) any concern for the home mycologist. What are they. Where did you get your information?
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Crushed
Sober Enough


Registered: 02/18/10
Posts: 96
Loc: Southwest
Last seen: 12 years, 6 months
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Re: Pink Mold; Red Bread Mold – Neurospora Q/A [Re: hamloaf]
#12164649 - 03/08/10 01:36 PM (13 years, 11 months ago) |
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http://en.wikipedia.org/wiki/Hyperthermophile
As you can see, they're really a rare set of organisms. Pretty incredible too, that they're able to survive and even thrive above the boiling point of water. But like I said, they only live in a few very special locations and wouldn't survive at near room temperature in your jars.
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In theory, there is no difference between theory and practice. In practice, there is.
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