• 0 Posts
  • 508 Comments
Joined 2 years ago
cake
Cake day: October 6th, 2023

help-circle



  • When somebody publishes a bullshit paper that is eventually withdrawn, every subsequent paper citing the fraudulent work can also be withdrawn as being unreliable.

    It depends on how foundational it is, of course. If you could swap it for a dozen other papers, nobody cares. If you’re continuing the work from a retracted paper, you’re fucked (but then, you probably would have noticed some errors pretty soon anyway).

    I have a friend who basically ran a series of experiments based on a paper that was complete bullshit. And like any good biochemist, he figured he was screwing up, or the equipment was faulty, or the substrate was more cursed than usual. Lucky for him, after weeks of smashing into a brick wall of failure, he started asking other people, who also kept failing and then they figured it out.



  • Terms like “sense” and “tell” are a bit misleading. It’s very much a chemical/mechanical interaction that’s automatic. Rather like soap bubbles “sensing” when they’ve reached the surface of the water.

    Plants contain a protein called phototropin, which is activated by light. When it’s activated, it changes the shape and alignment of the “skeleton” of the cell, making it more cube-shaped as opposed to long and skinny.

    That means the light side of a plant gets shorter, while the dark side remains long. The dark side also grows slightly faster, on a count of having more cells there (you can fit more skinny cells side-by-side than wide cells), and so the plant angles and grows toward the light.

    And yes. The colour matters. Phototropin reacts best to blue light, and leaves absorb mostly red and blue light (which is why they’re green). It basically ignores the green light filtered through leaves.









  • I can’t really find a good number for how cold you can get and not die, so let’s say 20 degrees. That gives 16 degrees to lose.

    Meat has a specific heat of about 3.5kJ per kilo per degree, so say you weigh 70kg, that’s about 4 million joules to lose before you die.

    At 650 joules per second, you’ve got slightly over 10 minutes. Of course, shivering will burn more calories and stuff, and the panic of impending death will likely stretch it a few more.

    I didn’t include clothes, because then the maths would make me cry.





  • Tar_Alcaran@sh.itjust.workstoScience Memes@mander.xyzPSA
    link
    fedilink
    English
    arrow-up
    39
    ·
    1 month ago

    Bailey and Littmans findings make the trans community angry because the research supports that for some trans females, (not all but some) they transition due to a sexual kink. That they can only be sexually excited by being a woman.

    I’m a cis woman and being a woman is very much a requirement for my sexual excitement.