this post was submitted on 30 Aug 2026
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Microblog Memes

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A place to share screenshots of Microblog posts, whether from Mastodon, tumblr, ~~Twitter~~ X, KBin, Threads or elsewhere.

Created as an evolution of White People Twitter and other tweet-capture subreddits.

RULES:

  1. Your post must be a screen capture of a microblog-type post that includes the UI of the site it came from, preferably also including the avatar and username of the original poster. Including relevant comments made to the original post is encouraged.
  2. Your post, included comments, or your title/comment should include some kind of commentary or remark on the subject of the screen capture. Your title must include at least one word relevant to your post.
  3. You are encouraged to provide a link back to the source of your screen capture in the body of your post.
  4. Current politics and news are allowed, but discouraged. There MUST be some kind of human commentary/reaction included (either by the original poster or you). Just news articles or headlines will be deleted.
  5. Doctored posts/images and AI are allowed, but discouraged. You MUST indicate this in your post (even if you didn't originally know). If an image is found to be fabricated or edited in any way and it is not properly labeled, it will be deleted.
  6. Absolutely no NSFL content.
  7. Be nice. Don't take anything personally. Take political debates to the appropriate communities. Take personal disagreements & arguments to private messages.
  8. No advertising, brand promotion, or guerrilla marketing.

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[โ€“] rain_enjoyer@sopuli.xyz 2 points 20 hours ago (1 children)

i've noticed biologists keeping CO2 cylinders connected to something near their -80C freezers, that's why i assumed it works for this kind of temperatures

Might be for keeping an inert atmosphere. Normally nitrogen would be the gas of choice for that but CO2 is cheaper and easier to store in bulk so if they don't absolutely need nitrogen then I could see CO2 being used instead. Basically you just keep the chamber slightly positively pressurized with CO2 to keep the oxygen out.

As far as temp keeping goes though basically all of the ultra low temp freezers (those not using liquid nitrogen anyways) I've seen use R-508b along with a medium temp refrigerant like R-404a or R-448a in a cascade setup to achieve those temps. I've never seen CO2 used for ultra low temp refrigeration due to it's nasty habit of turning solid below about 100PSIG.