dualmindblade [he/him]

  • 12 Posts
  • 196 Comments
Joined 5 years ago
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Cake day: September 21st, 2020

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  • Yeah seems like it, the gold standard coil alloy is kanthal and, don’t quite me on this, but I think it’s been basically the only one considered acceptable for “roll your own” coils since like forever, so almost certainly what you were using. And most DIYers used to use nic freebase only (not sure if that’s still the case), the paper implicates the hcl salt nic as possibly making the metal leeching thing more efficient:

    Nicotine salts introduce organic acids (5) in e-liquids, which may facilitate metal dissolution in e-liquids through ligand–metal interactions.

    Anyway, the metal of concern in kanthal is chromium which can be non-toxic depending on the chemical form. The paper stated they didn’t detect any toxic version of chromium in the vapor, although they speculate it might be possible for this to undergo a further chemical change in the lungs:

    Nontoxic Cr(III) was the only oxidation state of Cr observed in aerosols

    But they also detected metals that didn’t come from the coils! Like Escobar brand apparently has a coil sheath that is 40% lead. Like what the actual fuck were they thinking with that design decision? And sure enough the juice had lead in it before it was even vaped. Also they found antimony and stated they didn’t know where it came from, presumably it would be something the juice came into contact with before the device was put together.



  • Holy shit, that’s what I get for using a heuristic. Unless the results were faked this seems highly concerning. Relevant quite from the study:

    Across all devices, virgin e-liquids exhibited relatively low concentrations of the primary elements observed in the heating coils, including Cr (3 to 20 μg/kg) and Fe (148 to 1090 μg/kg) (Table S2). Across ELF Bar and Flum Pebble virgin e-liquids, Ni was similarly low to Cr and Fe (14 to 29 μg/kg; Table S2). Unexpectedly, elements that are not present in heating coils (Table S1), including Pb, Cu, Zn, and Sb, were observed at excessive concentrations in Esco Bar device virgin e-liquids, with the exception of Ni which was elevated in virgin e-liquids relative to ELF Bar and Flum Pebble virgin e-liquids and present in coils (Figure 1). Esco Bar Flavored and Clear virgin e-liquids showed extremely high concentrations of Pb (64,000 to 127,000 μg/kg), Ni (13,000 to 38,400 μg/kg), Cu (344,000 to 533,000 μg/kg), and Zn (240,000 to 376,000 μg/kg) (Table S2). For context, concentrations of Pb, Ni, Cu, and Zn were universally and comparatively low in all other virgin e-liquids from Elf Bar or Flum Pebble devices, at ≤15, ≤29, ≤24, and ≤331 μg/kg, respectively, with the exception of Zn in the ELF Bar Flavored virgin e-liquid at 4420 μg/kg (Table S2).








  • I’ve wondered about this since I don’t like hurting wasps. They will move out if you consistently get them wet, but it takes a long time. You can also blast the nest with water (they can’t fly when wet) to remove them then cut it down, they always try to rebuild at least 2 or 3 times but eventually they get the idea and move. There’s a video which shows how to move a while colony manually, sounds hard but might be a fun project: https://youtu.be/ml4IRBFuOvs

    I believe I tried a paper bag once for a fake nest, that didn’t work, you can buy more realistic ones online though. Unfortunately I may never know, new strategy is just to leave them be, the ones we get around here (South central Texas) are really non aggressive, the only way you get stung is making physical contact.

    One more thing, most of these social wasps abandon the nest over winter and rebuild the next year. If you catch them really early in spring it’s much easier to discourage them from building just by hosing it down, in this case it’s probably even easier than killing them with pesticide.



  • The very first paragraph of the final report from the National Security Commission on Emerging Biotechnology, a PDF that took 3 years and presumably millions of dollars to create

    Americans are already familiar with how the Chinese government conducts economic warfare with crucial technologies such as semiconductors: corner the supply chain, then choke it to weaken the United States. But this is not the last time Beijing will run this play, and it is not even the most dangerous version of it.

    Imagine a not-so-distant future where researchers in Shanghai develop a breakthrough drug that can eliminate malignant cells, effectively ending cancer as we know it. But when tensions over Taiwan reach a breaking point, the Chinese Communist Party (CCP), the strategic apparatus of the Chinese government, hoards the treatment under the guise of national security, cutting off supply to the United States. After years of access, this lifesaving drug is immediately in shortage, requiring doctors to ration it while American biotechnology companies scramble to reconstitute production in the United States. The streets and social media overflow with people demanding that the United States abandon Taiwan. The Administration faces an agonizing choice between geopolitical priorities and public health.

    This scenario is fiction. But something like it could soon become reality as biotechnology takes center stage in the unfolding strategic competition between the United States and People’s Republic of China (China).





  • Agree. Some smaller also good ones:

    Thomas Kern Really good at making some advanced/less mainstream topics accessible, careful to build up lots of necessary background and thoroughly explain details, so a bit like 3B1B except 0 fancy animations and slightly more rigorous. Covers a variety of topics but with a focus on automata and theory of computation.

    Sheafification of G The opposite of Thomas Kern, designed for people with extreme ADHD. No slowing down, very little explanation, borderline silliness, you learn by osmosis. Half of the videos are him trying to incept category theory into your head. I still haven’t learned category theory, but I’m old and my brain is starting to calcify, I did learn some stuff though and it’s always entertaining.