Archive for March 19th, 2017

Peroxydisulfate – “enables a non-enzymatic Krebs cycle precursor”

Sunday, March 19th, 2017
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The Wikipedia entry on peroxydisulfate is quite short (as of today). But I suspect this article may change things.[1].

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References

  1. M.A. Keller, D. Kampjut, S.A. Harrison, and M. Ralser, "Sulfate radicals enable a non-enzymatic Krebs cycle precursor", Nature Ecology & Evolution, vol. 1, pp. 0083, 2017. http://dx.doi.org/10.1038/s41559-017-0083

Pyrophoric metals + the mechanism of thermal decomposition of magnesium oxalate.

Sunday, March 19th, 2017
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A pyrophoric metal is one that burns spontaneously in oxygen; I came across this phenomenon as a teenager doing experiments at home. Pyrophoric iron for example is prepared by heating anhydrous iron (II) oxalate in a sealed test tube (i.e. to 600° or higher). When the tube is broken open and the contents released, a shower of sparks forms. Not all metals do this; early group metals such as calcium undergo a different reaction releasing carbon monoxide and forming calcium carbonate and not the metal itself. Here as a prelude to the pyrophoric reaction proper, I take a look at this alternative mechanism using calculations.

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