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PhytoExtractum Shop: Maeng Da Thai Kratom Leaf Powder

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OfflineFugueRider
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No Vent, Single and Double vent Petri Dishes
    #10121695 - 04/07/09 06:52 AM (14 years, 11 months ago)

I am getting ready to buy a case of 500 petri dishes. I am wondering what the differences in these kinds of petri dishes are. I have never heard of these differences and want to make sure I don't buy a bunch of petri dishes that have holes in them for vents or something. I can't find pictures of any of the vent kinds. Thanks.


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Offlineemstik5
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Re: No Vent, Single and Double vent Petri Dishes [Re: FugueRider]
    #10121783 - 04/07/09 07:39 AM (14 years, 11 months ago)

Taken from http://www.tritechresearch.com/petri.html

Some of our dish models are available in both "vented" and "non-vented" styles.  Standard Petri Dishes are always vented, so if the don't say vented or non-vented, you should assume they are vented.  "Vented" means that the lid is slightly elevated above the base.  This allows for good, plentiful air exchange.  This is useful when you want to encourage evaporation, for example, when you want to use poured plates as soon as possible, and the plates themselves, or a liquid seeding solution, needs to dry beforehand.  The basic design of the dish tends to maintain sterility because particles would have to go up and over the dish's wall to get inside, and this is rare in normal airflow.  With "non-vented" dishes, the lid fits quite flatly on the base.  While it is not a hermetic seal, the space between dish and lid is extremely small.  This results in even less potential for external contamination and a significantly reduced evaporation rate.  For example a 60mm vented Petri Dish containing 10ml of agar medium typically dries out in 2-3 weeks; whereas, a similar 60mm non-vented dish typically lasts 2-3 months.  Most C. elegans labs, except those in very humid climates, prefer the non-vented dishes.  Non-vented dishes provide sufficient air exchange for the worms to breath while greatly increasing the life of the dish.

So I would say the non vented.

*Edit*
Just thinking about that since we normally seal with micropore or glad wrap anyway the venting would make no difference.

Edited by emstik5 (04/07/09 09:08 AM)

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InvisiblePinback
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Re: No Vent, Single and Double vent Petri Dishes [Re: emstik5]
    #10122115 - 04/07/09 09:39 AM (14 years, 11 months ago)


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OfflineFugueRider
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Re: No Vent, Single and Double vent Petri Dishes [Re: Pinback]
    #10132339 - 04/08/09 07:10 PM (14 years, 11 months ago)

Cool, thanks y'all.


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