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Offlinetotal
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Agar contamination timeline
    #14167683 - 03/22/11 11:48 PM (12 years, 10 months ago)

So i got some culture tubes, that come sterile, but dont have autoclavable caps.
So instead of scrapping them, i made a jar of agar with an injection port and sucked the agar out of it with a sterile syringe and filled the tubes in front of my flow hood.  I just feel like this adds too many contamination steps in the whole process....

If they are going to contaminate, how long would it take to show on average? 4-6 days?


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Invisiblebiologys
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Re: Agar contamination timeline [Re: total]
    #14167705 - 03/22/11 11:52 PM (12 years, 10 months ago)

i've had trich show itself in as quick as 1.5 days, but normally 3-4 days if trich is there its going to show itself.

what I would of done would be, mix the agar, in a pot ont he stove, then pour into each container, then put foil over for a lid...sterilize, and then when you take it out slant it how you want to cool, and put a rubberband over the foil to keep it secure :shrug:


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Re: Agar contamination timeline [Re: biologys]
    #14168041 - 03/23/11 01:16 AM (12 years, 10 months ago)

Here are the tubes i used....
Didnt want to use foil, and i want an airtight seal...



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Invisiblebiologys
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Re: Agar contamination timeline [Re: total]
    #14168058 - 03/23/11 01:21 AM (12 years, 10 months ago)

sorry when i read about the caps i thought you said they didn't have caps, not that they weren't autoclaveable, my fault...thats the only reason i suggested foil!


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Re: Agar contamination timeline [Re: biologys]
    #14168174 - 03/23/11 02:07 AM (12 years, 10 months ago)

You could always put the caps in front of the flowhood and pc the tubes with foil, then open your pc in front of the hood and put the caps on...possibly? Even if the pc is huge, you can let them cool in it and put it on a chair that's just lower than the surface the filter is on.


--------------------
I challenge you to challenge yourself more! When you feel complacent and ready to hang it up, challenge yourself to get over it! If you fail, don't look at it as you didn't succeed, look at it as you would a rock face you're trying to climb. Stand back, wayyyy back, and look at it and plot another path. If you can't find one, shuffle down the way a little, a little change of scenery or a view from a different angle may give you the insight you need.

Anything I state is relayed information from a friend of a friend and should be viewed as completely fictitious. I do not partake in any illegal or grey-area-of-the-law activities, but do have lots of friends who may or may not.    -fngbronco

Pill Divider Agar Tek


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Re: Agar contamination timeline [Re: fngbronco]
    #14168299 - 03/23/11 03:12 AM (12 years, 10 months ago)

Ill let you know how it works out...
Ive been having alot of problems with my agar recipes anyways...so who knows if anything will grow...
Only thing iv got growing on agar lately is polypores....
Maybe PH?


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Invisiblefngbronco
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Re: Agar contamination timeline [Re: total]
    #14169839 - 03/23/11 12:49 PM (12 years, 10 months ago)

What recipe are you using? I found (by eyeballing) that slightly less nutrient agar seems to colonize faster, but that could also be the strain. If it contaminates youll know within a couple days. Best of luck on it!!


--------------------
I challenge you to challenge yourself more! When you feel complacent and ready to hang it up, challenge yourself to get over it! If you fail, don't look at it as you didn't succeed, look at it as you would a rock face you're trying to climb. Stand back, wayyyy back, and look at it and plot another path. If you can't find one, shuffle down the way a little, a little change of scenery or a view from a different angle may give you the insight you need.

Anything I state is relayed information from a friend of a friend and should be viewed as completely fictitious. I do not partake in any illegal or grey-area-of-the-law activities, but do have lots of friends who may or may not.    -fngbronco

Pill Divider Agar Tek


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Offlinetotal
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Re: Agar contamination timeline [Re: fngbronco]
    #14170066 - 03/23/11 01:19 PM (12 years, 10 months ago)

10g malt
9g agar
500ml water

I think the past i wasnt using distilled water, so there might have been some bad ph...
I think(hope) these work out better


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Invisiblefngbronco
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Re: Agar contamination timeline [Re: total]
    #14170789 - 03/23/11 03:18 PM (12 years, 10 months ago)

I use less malt than that and it colonized pretty quick, but it could just be my curse, and I've always used tap water. Shouldn't be anything wrong with the ph I wouldn't think unless your water is high. I'm no expert and don't know what exactly it could be, but from my experience a little less malt would be my suggestion.


--------------------
I challenge you to challenge yourself more! When you feel complacent and ready to hang it up, challenge yourself to get over it! If you fail, don't look at it as you didn't succeed, look at it as you would a rock face you're trying to climb. Stand back, wayyyy back, and look at it and plot another path. If you can't find one, shuffle down the way a little, a little change of scenery or a view from a different angle may give you the insight you need.

Anything I state is relayed information from a friend of a friend and should be viewed as completely fictitious. I do not partake in any illegal or grey-area-of-the-law activities, but do have lots of friends who may or may not.    -fngbronco

Pill Divider Agar Tek


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