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Cake day: June 29th, 2023

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  • 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.













  • I think water is rather rare as a coolant these days. Organics (chemical sense not farming sense) like propylene glycol or some kind of glyme aren’t potentially corrosive to metals if spilled, are harder to grow shit in, have lower volatility, and have a higher thermal limit. Maybe also with a little bit of antifouling agent thrown in. My main gripe with them is that if you do spill them, they don’t evaporate and you’re slipping over the floor for the next few days because you missed a spot.

    But yeah, air cooling ftw



  • I’ve got a technical bone to pick with the article. It seems that the article is referring to the active ingredients in pesticides themselves (instead of, say, some kind of perfluorinated surfactant additive). The active ingredients of the two pesticides called out in the article (Flufenacet and Diflufenican) each contain a -CF3 unit, and so they are PFASs themselves. The molecular structures are published, so saying “PFASs SHOCKINGLY discovered in pesticides” is a bit like saying “metal SHOCKINGLY discovered in food additives” in reference to table salt. Now admittedly table salt is pretty benign and pesticides are decidedly not, at least to certain organisms.

    As a side note, fluorinated functional groups (including polyfluoroalkyls, the “PFA” of PFAS) are often incorporated into bioactive molecules to increase metabolic stability or to change properties like lipophilicity and acidity/basicity. This, even though fluorinated organic molecules are extremely rare in nature. You find them all the time in drugs, including well-known ones like fluoxetine (Prozac) and celecoxib (Celebrex). Given the huge space of possible structures that could contain such a group, I am skeptical that all polyfluoroalkyl-containing molecules are as bad as e.g., PFOS wrt stability and toxicity; however, given their greater tendency to stick around relative to their non-fluorinated counterparts, regulation is likely prudent.




  • ornery_chemist@mander.xyztoMemes@lemmy.mlThe reason
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    1 year ago

    I think rz is linguistically equivalent to a soft r, so in this case rze would be “ре”, not “ж”. In some areas, rz is pronounced closer to the Czech ř. IIRC, ж transliterates to ż (not to be confused with ź, which is a soft z). The Polish Roman alphabet is very regular and well adapted to the language, representing palatalization and other non-Latin sounds as digraphs in a similar way to Italian or English.

    The cyrillicization of Polish was historically done to a limited extent, but carried with it some, shall we say, sociopolitical baggage. There are also some peculiarities to Polish that either don’t exist or have ambiguous transliterations into Cyrillic, such as the Polish nasals ą and ę or ó (historically a long o, but currenly pronouned /u/).


  • Nonono, you don’t understand, flame wars build character! 'Twere the early aughts that made me the healthy and well adjusted person I am today!

    Or at least, that’s what I’d say if what actually happened wasn’t that I became a jaded bastard and if I didn’t think it was just some ploy to drive engagement to let OP feel popular for a moment… in the best case scenario