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Cake day: March 28th, 2024

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  • I’ve had it happen to me, unintentionally. I worked in a retail store with a helium tank for inflating balloons. We thought it was the height of comedy to take a breath of helium when we did our overhead announcements. I decided to make a long announcement, so I exhaled as much as possible and took a deep breath of helium. The next thing I remember, I’m on the ground, my head hurts, and people are asking me if I’m okay. Apparently I made it about three steps before collapsing. I have no recollection of walking or passing out.








  • I’m a microbiologist but my grad school work, research, and coursework was very chemistry heavy. There are no “probably does somethings” of significance here: the chemistry of plastic generation is extremely well researched.

    Plastic is made of polymerized hydrocarbons, linked up identical tiny units of carbon strands called monomers. Polymerization, the linkage of the monomers into a polymer, requires the use of a catalyst. This is often done with increased heat and pressure to increase the speed of polymerization. Maximum temperatures are around 350°C for certain plastics but are more commonly 140-160°C as higher temperatures can cause the material to break down. Once the desired size of linkage is created, the polymer is capped to keep it from growing further.

    Polymerized hydrocarbons degrade, not further polymerize somehow, at high temperatures like 600° C. Saying there’s some mysterious, high-heat-driven polymerization is like saying burning wood, which is largely a polymer of glucose called cellulose, somehow creates more cellulose as it burns. The burning is due to the release of the energy contained in the bonds in the wood as they break down and react with oxygen.

    Even if the process DID somehow create some plastic, a given mass of brain tissue would be expected to create predictable amounts of this mystery polymer, giving a background measurement that can be subtracted. Again, though, we know how this all works so it’s not really a concern.