By Neal Stephenson
This is "the Word" -- one man's observe, definitely -- concerning the artwork (and artifice) of the country of our computer-centric lifestyles. And seeing that the "one man" is Neal Stephenson, "the hacker Hemingway" (Newsweek) -- acclaimed novelist, pragmatist, seer, nerd-friendly thinker, and nationally bestselling writer of groundbreaking literary works (Snow Crash, Cryptonomicon, etc., etc.) -- the notice is easily worthy listening to. quite often well-reasoned exam and partial rant, Stephenson's In the Beginning... was once the Command Line is a considerate, irreverent, hilarious treatise at the cyber-culture previous and current; on working approach tyrannies and downloaded renowned revolutions; on the net, Disney international, large Bangs, let alone the that means of existence itself.
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8, which surveys the performance of various decomposition agents for removal of residual peroxide (hydrogen peroxide and peracetic acid) from a simulated acidic process liquor. 00 — — a pH = 2 unless otherwise stated; b 2% on aluminosilicate (<200 mesh); cDarco 6-60 (100-325 mesh); d Bovine liver catalase containing 11 000 units/mg (1 unit = 1 /nnol hydrogen peroxide per min at pH = 7 and 250C). As discussed earlier, heterogeneous catalysts using a supported metal such as palladium are most effective.
Such compounds are often used as polymerization initiators on account of their radical decomposition at moderate temperatures (O-O bond homolysis). Neutral hydrogen peroxide can also react with activated acyl compounds such as anhydrides to give peroxyacids. 4). g. -unsaturated ketones) and aldehydes. The perhydroxyl anion is also of value in bleaching and product purification, particularly of natural products. 5). 6). 4 Dissociation of hydrogen peroxide under alkaline pH. 5 Generation of more powerful oxidants via the use of perhydroxyl anion.
Release of oxygen can lead to oxygen enrichment of the atmosphere above the normal 21% oxygen in air, and can consequently greatly increase the suscept- ibility to ignition of flammable materials and vapours, and the intensity of any fire or explosion that results from it. Adequate precautions should be taken during work-up, particularly in the case of distillation or evaporative crystallization, to prevent concentration of peroxidic species. If formation of an additional phase occurs, whether liquid or precipitate, it must be investigated with appropriate precautions, as it may contain active oxygen.