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Amazon Shop: Agar, Petri Dish

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OfflineKamek
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Agar Contam??
    #11355832 - 10/31/09 06:08 AM (8 years, 22 days ago)

Hey. I got some dishes with agar going. And one of them looks a bit strange.

Right next to the myc a light brownish blob appeared. Is it a contam or not??

Sorry for the shitty pic. It's the thing reflecting some light underneath the g.


If someone has a petri dish picture taking tek I'd appreciate that as well. Cheers!

edit:
I managed to take a better pic. Hope this helps. It's the brown thing between the G and the E.



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Edited by Kamek (10/31/09 07:03 AM)


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Offlineaudiophoenix
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Re: Agar Contam?? [Re: Kamek]
    #11355845 - 10/31/09 06:19 AM (8 years, 22 days ago)

You could really benefit from updating your camera. You may as well have no picture at all.

as for that contam you don't want to see any independent growth outside of the main body of myc. Does not matter what color it is, Bacteria can grow very white too. You just want to see a dense center with a white cloud fading off towards the edges any density other than the one in the center is a sign of bacterial or other contamination.


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Edited by audiophoenix (10/31/09 06:21 AM)


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OfflineKamek
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Re: Agar Contam?? [Re: audiophoenix]
    #11355872 - 10/31/09 06:34 AM (8 years, 22 days ago)

NM.


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Edited by Kamek (10/31/09 07:06 AM)


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OfflineKamek
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Re: Agar Contam?? [Re: Kamek]
    #11355915 - 10/31/09 07:04 AM (8 years, 22 days ago)

I got a better image of the possible contam.



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OfflineKamek
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Re: Agar Contam?? [Re: audiophoenix]
    #11357656 - 10/31/09 03:35 PM (8 years, 22 days ago)

Quote:

audiophoenix said:
You could really benefit from updating your camera. You may as well have no picture at all.

as for that contam you don't want to see any independent growth outside of the main body of myc. Does not matter what color it is, Bacteria can grow very white too. You just want to see a dense center with a white cloud fading off towards the edges any density other than the one in the center is a sign of bacterial or other contamination.




Thank you. I will follow your advice and throw it out. I still have 5 others that are looking good so far.


Edited by Kamek (10/31/09 03:41 PM)


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Offlinefundamentalchair
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Re: Agar Contam?? [Re: Kamek]
    #11359627 - 10/31/09 09:34 PM (8 years, 21 days ago)

While this isn't a specific agar-pic-tek, the problem you are getting is from the flash (or any other light source really) having a specular reflection into the camera. The easiest way to stop this (glare) is with some sort of light diffuser. You can't have light shine directly (or from any specular reflection source) on to something shiny. This is why photographers shine a light into the inside of an umbrella to light up a person instead of direct lighting (who wants a shiny spot on their nose in a picture?).

check out some of these links for some ways of diffusing different light sources.

http://www.camerahacker.com/build/Soft_Light.php
http://shutterfinger.typepad.com/shutterfinger/2008/08/how-to-make-a-flash-diffuser.html
http://steampunkworkshop.com/flash-diff.shtml

A light box is exceptional for taking pics, although it may be difficult with something like a dish.

http://blog.makezine.com/archive/2009/10/knex_lightbox_tutorial.html

Or you can just google "how to build a flash diffuser" which is pretty much what I did.


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Offlinesolumvita
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Re: Agar Contam?? [Re: fundamentalchair]
    #11361733 - 11/01/09 11:59 AM (8 years, 21 days ago)

Bacteria contam, if you were desperate you could isolate healthy mycelium onto a new plate from the other side of the mycelium  But since you have 5 others rather throw it away.


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Amazon Shop: Agar, Petri Dish

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