• 0 Posts
  • 210 Comments
Joined 2 years ago
Cake day: June 29th, 2023
  • ornery_chemisttoich_iel@feddit.org•ich_iel
    2·
    25 days ago

    Ich glaube ich erinnere mich dass Duolingo Lektionen über Konjunktiv II (?; wäre, gäbe, usw) hatte… muss vor fast etwa 10 Jahren gewesen sein, bevor alles beschissen wurde. Ich könnte mich auch falsch erinnern… es ist eine große Weile her, seit ich die verfluchtete Eule besucht habe…

  • ornery_chemisttoAutism@lemmy.ml•Autism/ND Resource
    1·
    28 days ago

    The layout is decent and not unfriendly on mobile (please consider that praise; I am a cranky mobile site hater). I’m not sure how much you can control vs what whatever template/engine you are using restricts, but here are couple of suggestions:

    • Navigating to a new page briefly passes through some kind of light blue loading screen. The color is bright enough that it is a bit of a jumpscare in dark mode and (for me) unpleasant. If possible, you may want to adjust it to follow the theming or remove it.
    • The light/dark mode switch occasionally obscures a few chars of text. It is not a huge problem but may be better served in the header toolbar or hamburger menu.
    • In my experience, a lot of people prefer dark mode to light, a preference more substantial for photosensitive folks; consider making dark the default.
    • All of the links in the footer are broken.
  • ornery_chemisttoScience Memes•The Periodic Table according to astronomersEnglish
    5·
    1 month ago

    The intended joke is that hypervalent iodine compounds like Dess-Martin periodinane flip between different oxidation states like you often see for transition metals. As an example, the mechanism usually drawn for oxidations by DMP is similar to those drawn for PCC/Jones reagent, where the electrons removed from the substrate are “banked” at the metal center. Obviously, redox chemistry is not at all limited to transition metals, but I am often surprised at iodine’s propensity to engage in it. A lot of research over the past decade or two has also developed redox catalysis with these reagents, reactivity which is commonly (though again not always) the purview of transition metals.

  • ornery_chemisttoFunny@sh.itjust.works•Fair
    301·
    2 months ago

    Nah fam, people like that are the reason we had to evacuate the dorms every month or so in the middle of the night during the winter months.

    That and idiots making toast. Not sure how people routinely fucked that up so badly.

  • ornery_chemisttoMemes@lemmy.ml•It's scientific! I promise! :)
    3·
    2 months ago

    So I found this website that lists specific heat capacities for various foods, and while it doesn’t list “snacks”, dry foods values seem to range from 0.3 to 1 cal•g-1•K-1 = 0.0003 to 0.001 Cal•g-1•K-1. Assuming no phase change (i.e., melting) and otherwise temperature-invariant heat capacity, the energy required for heating a 100 g snack from freezer temps (-18 °C) to body temp (37 °C) is 1.65 to 5.5 Cal. More realistically, we can compare to eating an ambient-temp (20 °C) snack; that difference is only 1.1 to 3.8 Cal… in either case, the difference is negligible, generally < 1% of the calorie count of the snack itself.