becausechemistry

u/becausechemistry@lemy.lol
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on me_irl · c/me_irl · 1 pts · 263d

We’re ranking danger here. I’d much rather be in the room with dilute peroxide and vinegar than with chloramine or chlorine.

on me_irl · c/me_irl · 3 pts · 263d

The dose makes the poison. At the concentrations you’d get from household precursors, it would be fine.

Now, take glacial acetic acid and treat it with high-concentration peroxide? Now you’ve got something there. But most people don’t have easy access to either.

on me_irl · c/me_irl · 19 pts · 263d

Chloroform is the third most dangerous thing on that list.

on ¡! FREE REFILLS !¡ · c/science_memes · 4 pts · 267d

This image is a reference to things like this, where you send dry (containing low water content) solvent through a column of activated alumina to make it even more dry.

It doesn’t really work as well with some solvents. The one I used in grad school had DCM, toluene, THF, and acetonitrile. If we needed dry DMSO, DMF, DMAc, acetone, MEK, or alcohols they had to come from a sealed bottle.

on Honestly wtf? · c/science_memes · 58 pts · 282d

Graduate students famously never make mistakes (like including their own hair in samples) and also never smoke weed. So that couldn’t be it.

SpaceX was founded in 2002, and announced Falcon 9 in 2005. By 2010 they launched, in 2013 they started propulsive landing experiments, and in 2015/16 they landed on a pad / a drone ship. About 13 years from founding to reuse, and ten years from F9 announcement to reuse.

Blue Origin was founded in 2000, declared first stage reuse a priority in 2013, announced New Glenn in 2016, launched in early 2025, and landed in late 2025. 25 years from founding to reuse, and 9 years from NG announcement to reuse.

I guess the difference is that SpaceX was making money in those intervening years, and Blue was content to, uh, do a lot of simulations I guess.