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RCSB PDB: Homepage
Protein databank. Beautiful renderings of molecules
science  chemistry 
15 hours ago by gcappaert
The Hunt for Earth’s Deep Hidden Oceans | Quanta Magazine
tl,dr: how to get samples from inaccessible places
These mineral flecks — some too small to see even under a microscope — offer a peek into Earth’s otherwise unreachable interior. In 2014, researchers glimpsed something embedded in these minerals that, if not for its deep origins, would’ve been unremarkable: water.

Not actual drops of water, or even molecules of H20, but its ingredients, atoms of hydrogen and oxygen embedded in the crystal structure of the mineral itself. This hydrous mineral isn’t wet. But when it melts, out spills water. The discovery was the first direct proof that water-rich minerals exist this deep, between 410 and 660 kilometers down, in a region called the transition zone, sandwiched between the upper and lower mantles.
geophysics  chemistry  geology  science  writing 
18 hours ago by kmt
Enzymatic construction of highly strained carbocycles | Science
Bicyclobutnae is a pain and expensive to make, so hasn't been seriously researched for rocket propellant research, but using e.coli to make it via enzyme catalyst now makes it a biofuel (biorocketfuel?). 8C boiling point versus cryogenic methane makes for an interesting trade study.
bicyclobutane  biology  organic  chemistry  materials  science  research  technology  rocket  fuel  propellant  biofuel  e.coli  bacteria  enzyme  production  catalyst 
5 days ago by asteroza
DE MORVEAU, GUYTON (1737 - 1816), et al
> The Méthode de Nomenclature Chimique was the result of eight months of intensive work by four French chemists, Guyton de Morveau, Lavoisier, Berthollet, and Fourcroy, who met almost daily from the middle of 1786 until its publication in 1787. Before this work, the same substance might have as many as 12 different names, mostly having no relation to the thing. The main object of the Nomenclature was to present a systematic view of Lavoisier's new system of chemistry and to propose a more rational system of naming chemical compounds. The older nomenclature was characterized by names such as powder of algaroth, oil of tartar, salt of alembroth, pompholix, and many others, which often bore little or no relation to the substance's chemical constitution. In contrast, the Nomenclature introduced names such as hydrogen, oxygen, sodium chloride, and ferric sulfate, which are still in use today.
chemistry  history  science 
9 days ago by porejide
Problems with this class include:
- no safety goggles
- no trigger discipline
- no leibig condenser

chemistry  from twitter_favs
10 days ago by exlibris

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