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JahLambsbread
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Registered: 08/08/10
Posts: 684
Last seen: 6 years, 3 months
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do you need to use a pressure cooker for petri dishes?
#19001340 - 10/19/13 08:16 PM (10 years, 3 months ago) |
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Do you need to use pressure cooker for petri dishes? The are in a science kit.
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Mush4Brains
LOOL HACKED!!!

Registered: 07/31/13
Posts: 4,419
Last seen: 9 years, 2 months
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Re: do you need to use a pressure cooker for petri dishes? [Re: JahLambsbread]
#19001346 - 10/19/13 08:17 PM (10 years, 3 months ago) |
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You don't pressure cook plastic dishes. You buy sterile dishes, and pour your pressure cooked agar into them.
Keep reading.
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 4 days
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Re: do you need to use a pressure cooker for petri dishes? [Re: JahLambsbread]
#19001672 - 10/19/13 09:39 PM (10 years, 3 months ago) |
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Glass petri dishes can be pressure cooked or boiled. I used to boil them in water for a few minutes and then keep them in the hot water until I was ready to fill them in front of the flowhood or in a still air box. 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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JahLambsbread
Stranger

Registered: 08/08/10
Posts: 684
Last seen: 6 years, 3 months
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Re: do you need to use a pressure cooker for petri dishes? [Re: RogerRabbit]
#19008316 - 10/21/13 12:27 PM (10 years, 3 months ago) |
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ok I got petri dishes with pre-made agar. I just says to put in the microwave and you're good to go. My half pint jar with dog food agar got contaminated so hopefully this works.
I was thinking of putting both spores and tissue on one. does this raise the chance of contamination?
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JahLambsbread
Stranger

Registered: 08/08/10
Posts: 684
Last seen: 6 years, 3 months
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Re: do you need to use a pressure cooker for petri dishes? [Re: JahLambsbread]
#19011066 - 10/21/13 10:26 PM (10 years, 3 months ago) |
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?
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JMcDoogle
A Serious Scholar

Registered: 07/07/09
Posts: 1,495
Loc: Nunavut
Last seen: 3 years, 9 months
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Re: do you need to use a pressure cooker for petri dishes? [Re: JahLambsbread]
#19011535 - 10/22/13 12:03 AM (10 years, 3 months ago) |
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Its my understanding that making your own agar is beyond cost effective, and also as cheap as they are ( 25pack of three tiered plastic-presterile dishes at 5$ a piece and 10dollars shippping Link here - Cymar
So, Subtotal $28.80 Shipping Charges $10.95 Grand Total $39.75
150 Petri Dishes @ $39.75 = .26 Cents a piece - Cheaper if you buy more.
Plus, having a pressure cooker once reaching a more advanced and productive stage of mycology is a must, even if you're just getting a smaller pressure cooker.
Amazon - Presto 23 QT - 80 Dollars
This is a cheap, 23qt - I believe fitting 7 Jars upright and 3 sideways for a total of 10 1QT Jars per Load.
You can always use 1/2 Pint - 1 Pint Jars and Opt for a smaller pressure cooker, but look here - 6 QT PRESTO - Amazon Its 50 Dollars, for an extra 30 Dollars, you'll be able to use less energy overall and load many more quarts, something to think about.
A pressure cooker is your friend in this hobby, after having one you wont look back.
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The ego is nothing other than the focus of conscious attention.
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Stromrider
This must be the place



Registered: 06/02/13
Posts: 7,326
Loc: Dept of know what I'm say...
Last seen: 1 hour, 24 minutes
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Re: do you need to use a pressure cooker for petri dishes? [Re: JMcDoogle]
#19011547 - 10/22/13 12:05 AM (10 years, 3 months ago) |
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Get a job and save some money. Don't cut corners and you will have success
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