• 0 Posts
  • 50 Comments
Joined 1 year ago
cake
Cake day: July 2nd, 2023

help-circle









  • This is why a lot of things used in biological processes need to be purified, one of the steps is separating the enantiomers. Chirality in molecules is common but people might not know what it means, especially when it comes to drugs or supplements. Molecules with chiral centers rotate one way or the other (Dextro- or Levo-rotation) , this can be determined in a lab using light waves, so it’s called optical activity. You could find L-carnitine supplements in a grocery store, for example. When synthesized both enantiomers are produced, but only one is useful for biological mechanisms. D-carnitine is considered toxic because it can cause the L-carnitine in your body to be less effective, and you don’t want your cell metabolism to stop or slow.

    I used carnitine as an example, but stereochemistry is really important to understand when it comes to drug manufacture






  • I’m currently dealing with neighborhood kids sledding into my chain link fence. I’ve seen several absolutely stun themselves on it. Yesterday I asked them to stop sledding into the fence, nicely but for like the 15th time since Monday. They took that as a challenge I guess, because they all started doing it. It’s going to cost me about $300 to fix it, as long as the posts are still straight.

    Two have had to go to the er this week, and they went right back to sledding into my fence. The parents don’t care at all. Yesterday the cops managed to show up in time to catch a few and get their names, but about an hour later they were back at it.

    I want to replace the fence with something more substantial, for privacy, but I’m actually worried one of these feral children will kill themselves on it






  • FoxyFerengi@lemm.eetoComic Strips@lemmy.worldSaving time
    link
    fedilink
    arrow-up
    5
    ·
    edit-2
    1 month ago

    Laser wavelengths targets melanin (a molecule with a specific color absorption and reflection), which is low in light colored hair or skin. Higher melanin density means a darker (appearing) color, so more opportunities for the light to react. This is why a dark hair color and light skin color has the best success with laser.