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Amazon Shop: ½ Pint Jars, Brown Rice Flour, Pressure Cooker, Scales, Vermiculite, Wild Bird Seed

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Offlinepfshroomer
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Why a pressure cooker?
    #2579599 - 04/19/04 10:15 PM (13 years, 7 months ago)

Why are pressure cookers so important when your using birdseed to spawn?
I mean couldnt you just boil the birdseed at a high temperature in the jars and then innoculate?
Peace,
PF~


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Offlinedoc34
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Re: Why a pressure cooker? [Re: pfshroomer]
    #2579625 - 04/19/04 10:21 PM (13 years, 7 months ago)

you use a pc to create pressure to push moisture into the core of your seed(grain).


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Invisibletoad857
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Re: Why a pressure cooker? [Re: pfshroomer]
    #2579628 - 04/19/04 10:21 PM (13 years, 7 months ago)

at standard pressure (1.0 atm) water will boil at 100 degrees. the pressure can vary depending on where you live to as low as 90 degrees for boiling.

so, you can only get the jars as hot as 100 degrees if you are going to boil them. after they reach 100, the water turns to gas and leaves.

pressure cookers will increase the pressure to say, 2.0 atm, so that you can get the water inside to like 140 degrees or something without it turning into a gas.

i dont know anything about birdseed--ive never even seen a pressure cooker in person before. i assume that birdseed needs to be sterilized at a much higehr temp than 100 degrees to be effectively sterilized. that's why you have to PC it... i think....


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Offlinedoc34
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Re: Why a pressure cooker? [Re: toad857]
    #2579645 - 04/19/04 10:23 PM (13 years, 7 months ago)

Quote:

toad857 said:
at standard pressure (1.0 atm) water will boil at 100 degrees.  the pressure can vary depending on where you live to as low as 90 degrees for boiling.
Quote:

[



:thumbdown:dude your blood is boiling!


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OfflineDerek
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Re: Why a pressure cooker? [Re: doc34]
    #2579651 - 04/19/04 10:24 PM (13 years, 7 months ago)

Water at higher pressure boils at higher temperatures.

Boiling pure water at 1 atmosphere gets it to a max of 100 degrees, pressure cookers let you get to temps of around 250. (?)

Edit: Seems like I got here late.


Edited by Derek (04/19/04 10:26 PM)


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Offlinedoc34
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Re: Why a pressure cooker? [Re: toad857]
    #2579680 - 04/19/04 10:27 PM (13 years, 7 months ago)

  A common practice for many people that live at altitudes well above sea level is to set a base line calibration for a cooking (or any other) thermometer by checking the temperature against that of water boiling. Normally water boils at standard pressure of 29.92 inches of Mercury at 212?F. If you are at an altitude of 5,000 feet above sea level and wish to calibrate your thermometer using boiling water as the standard, the altitude adjusted cooking charts will tell you the boiling point of water at 5000 feet is 202?F. The problem arises if, for example, on any given day the barometric pressure is 30.05 inches of Mercury (Hg) at 5,000 feet above sea level, the correct boiling point for water is 212+?F. If your thermometer indicates 212? in boiling water, you will believe it to be 10? high. This means that if you are cooking a turkey or a roast to an internal temperature of 170?F within the meat, you will actually overcook by 10?. A more correct and consistent method to determine the correct boiling temperature of water, at a specific time, is to calibrate the thermometer at altitude but by using the barometric pressure at that time.
:cool:


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Invisibletoad857
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Re: Why a pressure cooker? [Re: doc34]
    #2579706 - 04/19/04 10:31 PM (13 years, 7 months ago)

100-90 degrees celcius, not farenheit hehe.

also,

blood is blood---not water. it's full of plasma, proteins, blood cells, and tons of other macromolecules that are too numerous to mention (plus i don't know what they are). its boiling point is probably way way high.


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Offlinepfshroomer
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Re: Why a pressure cooker? [Re: toad857]
    #2579761 - 04/19/04 10:39 PM (13 years, 7 months ago)

so basically Ive wasted spores because I didnt use a PC?
Dear GOD I hope somehow,someway it still works!
But thanks for the quick replies anyways!
Peace,
PF~


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OfflineJohnnyJ
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Re: Why a pressure cooker? [Re: pfshroomer]
    #2581617 - 04/20/04 09:19 AM (13 years, 7 months ago)

Not sure about birdseed, but you can get away with just boiling the shit out of a standard pf verm/brf mixture. You can probably expect higher contamination rates though. According to one tek on this site, "I've heard of people getting 100% success with this method, but I've also heard of 100% contamination" [not exact quote].
HTH
JohnnyJ


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Invisiblesakura
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Re: Why a pressure cooker? [Re: pfshroomer]
    #2581645 - 04/20/04 09:36 AM (13 years, 7 months ago)

Yep...  you have more than likely wasted your spores...  (99% anyway)

Grains contain endospores which survive normal boiling.  It's really worth doing a LOT of reading before you start with this as there are a lot of things that can completely fuck you up if you're not aware of them (nothing that can't be worked around if you spend the time to read all the relevant teks first, though :wink: )


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Invisiblepsilomonkey
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Re: Why a pressure cooker? [Re: pfshroomer]
    #2582034 - 04/20/04 12:14 PM (13 years, 7 months ago)

Dry grain can contain bacterial spores, which can be tough to destroy, boiling won't do it. You need the PC to get the temp up enough. Its also a good idea to soak the grain for about 12hrs so the bacterial spores germinate, loosing a the protection of the spore state.

PS: 100 degrees is about the boiling point of oxygen :smile: Its all a matter of scale.


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Amazon Shop: ½ Pint Jars, Brown Rice Flour, Pressure Cooker, Scales, Vermiculite, Wild Bird Seed

Mushrooms, Mycology and Psychedelics >> Mushroom Cultivation

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