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Offlinekranked
it'smushtastic!!

Registered: 08/31/04
Posts: 106
Last seen: 16 years, 5 months
Malt/Dextrose LC's
    #5812898 - 07/02/06 04:33 PM (17 years, 6 months ago)

I cannot for the life of me find the proportions for a malt/dextrose liquid culture. My past honey and karo LC's have failed, so I'm moving onto malt/dex. Can anyone suggest a good tek?


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"When it went off in New Mexico, that first atomic bomb, we thought of Alfred Nobel and his hope, his vain hope, that dynamite would put an end to all war"

-Robert Oppenheimer 1945


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Invisiblemonstermitch
Growing in Bags Doesn't Work

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Re: Malt/Dextrose LC's [Re: kranked]
    #5812901 - 07/02/06 04:34 PM (17 years, 6 months ago)

per quart jar:

one level tablespoon each of
light dry malt
dextrose


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Offlinekranked
it'smushtastic!!

Registered: 08/31/04
Posts: 106
Last seen: 16 years, 5 months
Re: Malt/Dextrose LC's [Re: monstermitch]
    #5812907 - 07/02/06 04:35 PM (17 years, 6 months ago)

Quote:

monstermitch said:
per quart jar:

one level tablespoon each of
light dry malt
dextrose




Sorry, one more stupid question, how many milliliters in a quart?


--------------------
"When it went off in New Mexico, that first atomic bomb, we thought of Alfred Nobel and his hope, his vain hope, that dynamite would put an end to all war"

-Robert Oppenheimer 1945


Edited by kranked (07/02/06 04:36 PM)


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Offlinekranked
it'smushtastic!!

Registered: 08/31/04
Posts: 106
Last seen: 16 years, 5 months
Re: Malt/Dextrose LC's [Re: kranked]
    #5812917 - 07/02/06 04:38 PM (17 years, 6 months ago)

Oopppss..should have consulted google first.

4 cups (2 pints) = 1 quart (32 ounces)

Thanks for the help Mitch! much appreciated.


--------------------
"When it went off in New Mexico, that first atomic bomb, we thought of Alfred Nobel and his hope, his vain hope, that dynamite would put an end to all war"

-Robert Oppenheimer 1945


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Invisiblemonstermitch
Growing in Bags Doesn't Work

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Posts: 3,911
Loc: Arizona Bay Flag
Re: Malt/Dextrose LC's [Re: kranked]
    #5812932 - 07/02/06 04:45 PM (17 years, 6 months ago)

I fill my quart jars to around 700.
600 is a touch safer, but I like 700.

just keep your contam filter dry and clean.


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OfflineSnaggletooth
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Re: Malt/Dextrose LC's [Re: monstermitch]
    #5813123 - 07/02/06 06:06 PM (17 years, 6 months ago)

I dont measure I weigh it, 2 cups of water,


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Atheist Chat


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InvisibleTippinthru
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Registered: 04/07/05
Posts: 1,131
Loc: "The Garden"...
Re: Malt/Dextrose LC's [Re: kranked]
    #5813190 - 07/02/06 06:39 PM (17 years, 6 months ago)

I use a level tablespoon each, to a quart of boiling water.
Then filter through 4 or 5 stacked coffee filters into jars.
Then, PC @ 15 psi 15 to 20 minutes.


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Perfection is attained by slow degrees; it requires the hand of time...
[


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Offlinekranked
it'smushtastic!!

Registered: 08/31/04
Posts: 106
Last seen: 16 years, 5 months
Re: Malt/Dextrose LC's [Re: Tippinthru]
    #5813310 - 07/02/06 07:19 PM (17 years, 6 months ago)

How necessary is the filtration of the liquid? I'm not looking to cut corners, I just missed this step and my LC has already been sterilized. Should I start over or is it not a big deal? I don't want to waste spores on an LC that isn't going to grow.


--------------------
"When it went off in New Mexico, that first atomic bomb, we thought of Alfred Nobel and his hope, his vain hope, that dynamite would put an end to all war"

-Robert Oppenheimer 1945


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InvisibleTippinthru
contented

Registered: 04/07/05
Posts: 1,131
Loc: "The Garden"...
Re: Malt/Dextrose LC's [Re: kranked]
    #5813417 - 07/02/06 07:59 PM (17 years, 6 months ago)

No real need to filter it.
That just removes the tiny chunks, anyway.
I do so because I don't want anything but Myc visible.


--------------------
Perfection is attained by slow degrees; it requires the hand of time...
[


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Invisiblefastfred
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Re: Malt/Dextrose LC's [Re: Tippinthru]
    #5815055 - 07/03/06 07:49 AM (17 years, 6 months ago)

Malt Extract Agar (3%)(MEA)(General Microbiology)(FDA M93)
----------------------------------------------------------
30 g Malt extract
20 g Agar
1 L Distilled water

Boil to dissolve ingredients. Avoid overheating, which causes softening of agar and darkening of medium color. Autoclave 15 min at 121°C. Dispense 20-25 ml into sterile 15 x 100 mm petri dishes. Final pH, 5.5 ± 0.2.

This medium is recommended as a general maintenance medium. [1]

[1] Bacteriological Analytical Manual, 8th Edition, Revision A, 1998.


Just omit the agar to make liquid media.


-FF


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