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Amazon Shop: ½ Pint Jars, Agar, Petri Dish

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OfflineJunkaboy
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Does agar go bad?
    #3842336 - 02/27/05 06:34 PM (12 years, 3 months ago)

My girlfriend (who is an enthomologist) found some agar (already with potato thingy)on her laboratory, the expiration date has long passed (it said good until 99). The container was well sealed, there was no humidity inside. We used it (pressure cooked for an hour) and put it on petri dishes. It did just fine, gelatinized (did I just make this word up?) ok.
Today I got lucky and found 2 :mushroom2: :mushroom2: beautifull cubbies (after over 2 hours searching, sorry no pics), they are already printing. I was wondering if the agar will still work, or if I will waste my precious spores.

Thanks.


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OfflineFluxburn
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Re: Does agar go bad? [Re: Junkaboy]
    #3842374 - 02/27/05 06:40 PM (12 years, 3 months ago)

u would think it was bad if it experied in 99 and its 6 years later............

but that is common sense, and sometimes I lack that as well.


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Invisibledog
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Re: Does agar go bad? [Re: Junkaboy]
    #3842609 - 02/27/05 07:26 PM (12 years, 3 months ago)

Those expiration dates are only estimates and are usually pretty conservative. I'd use it.


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OfflineJunkaboy
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Re: Does agar go bad? [Re: dog]
    #3842812 - 02/27/05 08:08 PM (12 years, 3 months ago)

Here is a pic of the leftover agar, after it cooled I played with it to see the contams... you can see 2 different types of fungus growing there (fusarium and penicillium).

I guess this shows that the agar is good for use...



Junka


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InvisiblePrisoner#1
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Re: Does agar go bad? [Re: Junkaboy]
    #3842902 - 02/27/05 08:27 PM (12 years, 3 months ago)

I had an open jar, covered in foil in my fridge for 2 years, it simply dried out


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Amazon Shop: ½ Pint Jars, Agar, Petri Dish

Mushrooms, Mycology and Psychedelics >> Mushroom Cultivation

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