Comment on Prove your humanity.

• Sterile_Technique@lemmy.world ⁨1⁩ ⁨year⁩ ago

  Visual breakdown for anyone interested:

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  • beeng@discuss.tchncs.de ⁨1⁩ ⁨year⁩ ago

    Nice username

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    • Sterile_Technique@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Image

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  • icelimit@lemmy.ml ⁨1⁩ ⁨year⁩ ago

    1 through to the end are all made with new, sterile… sticks?

    Look ma, I’m a biochemist now!

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    • Sterile_Technique@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Pretty much. It’s like a little wire loop - sterilize it with a bunsen burner, let it cool, then take a swab from your source specimen and drag it into your agar for that section 1. Sterilize it again with the burner, cool, then drag through the last couple lines of 1 to get region 2. Repeat for 3 and again for 4. The sample size of individual microbes gets exponentially fewer each time - done correctly and region 4 is dotted with individual cells, which you leave alone for a while to incubate, then come back and start making your observations like how it’s interacting with the agar, what color, texture etc; smear it onto a microscope slide, see how it responds to different stains, it’s shape, it’s arrangement… then start checking all those findings against known properties of different microbes until you find a match.

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      • janus2@lemmy.zip ⁨1⁩ ⁨year⁩ ago

        raise your hand if you ever wrecked a plate by forgetting to cool the loop

        ✋🫩

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      • BrowseMan@sh.itjust.works ⁨1⁩ ⁨year⁩ ago

        Another way is one use throwable plastic hoop. Which is completely stupid, but well…

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