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Amazon Shop: ½ Pint Jars, Agar, Malt Extract

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Offlinecrazytab
journeyman
Registered: 11/19/02
Posts: 62
Last seen: 10 years, 7 months
question about using agar?
    #2256380 - 01/20/04 04:34 PM (13 years, 5 months ago)

My friend has a big jar of agar and hes going to put some in a perti dish to test to see if his spores work. Does he have to pressure cook the agar? And what about the rest of the agar in the big jar, is it safe to use again a week later since it's been open? Thanks!


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InvisibleJohn
ssdp.org

Registered: 08/08/03
Posts: 7,026
Loc: Vancouver, B.C.
Re: question about using agar? [Re: crazytab]
    #2256413 - 01/20/04 04:41 PM (13 years, 5 months ago)

you gotta add nutrients to it, look up the agar teks on the main page for examples, the agar is already molded like congelealed? (don't know how else to put it) I guess I mean not a powder but rather a solid hunk. that's weird if so, usually it just comes as powder, anyway yeah you have to pc it but adding nutrients would be tricky if it's already solid, you would have to heat it up on a stove until it's liquid then mix in the malt/dextrose or whatever you wanna use then pc it, then pour it. oh and mea will stay good in the refridgerator for a couple months


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Anonymous

Re: question about using agar? [Re: crazytab]
    #2256415 - 01/20/04 04:41 PM (13 years, 5 months ago)

Yes, the agar must be PC'd ...before pouring if using plastic plates, after pouring if using glass plates. I never make more than I am going to use right away, so I don't know how "reusable" it is. When I use glass plates, I have saved excess agar as the glass plates are PC'd after pouring. Perhaps repeated PCing might carmelize sugars? Some one out there is more experienced than I am and will probably give you better info...


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OfflineJetBlackNinja
Pimp-o-licious
Registered: 11/26/03
Posts: 495
Loc: $%^&
Last seen: 12 years, 7 months
Re: question about using agar? [Re: crazytab]
    #2256423 - 01/20/04 04:42 PM (13 years, 5 months ago)

I buy pre-poured, pre-sterilized plates. Boy am I lazy.


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Offlinecrazytab
journeyman
Registered: 11/19/02
Posts: 62
Last seen: 10 years, 7 months
Re: question about using agar? [Re: JetBlackNinja]
    #2256452 - 01/20/04 04:50 PM (13 years, 5 months ago)

The agar is already all mixed up and ready to use, he was just wondering if you still have to pressure cook it? Sounds like you do?


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InvisibleJohn
ssdp.org

Registered: 08/08/03
Posts: 7,026
Loc: Vancouver, B.C.
Re: question about using agar? [Re: crazytab]
    #2256462 - 01/20/04 04:51 PM (13 years, 5 months ago)

yeah of course, how else do you plan on getting it out?


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There's a thin line between sanity and insanity... and I just snorted it.


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Amazon Shop: ½ Pint Jars, Agar, Malt Extract

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