By Jules Bebie
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Extra info for Manual of Explosives, Military Pyrotechnics, and Chemical Warfare Agents : Composition, Properties, Uses
The temperature coefficient of the velocity of conduction in nerve is about 1-8 for a rise of 10°, and is of the same order as 1 Hodgkin, Biol. Rev. 1951, 26, 379. 29 NOTES ON THE MAMMALIAN NERVOUS SYSTEM t h a t of the velocity of chemical change, and is far greater than t h a t of electrical conductions. At 0° conduction is usually completely abolished. Complete nerve block can also result by subjecting the nerve to the action of air containing anaesthetic vapours. On removal of the vapour the conductivity is restored.
A still more economical method for large-scale work was then sought, since a further drawback of methods (i) and (iii) is that 1 Cf. Gerrard, J. Chem. Soc. 1940, p. 1464, who had worked, however, only with n-butyl alcohol. 1 Walczynska, Roczn. Chem. 1926, 6, 110. 8 Milobedski and Sachnowski, Chem. Zbl. 1918, 1, 911. 4 McCombie, Saunders and Stacey, J. Chem. Soc. 1945, p. 380. 44 SYNTHETIC METHODS the complete removal of the tertiary base is sometimes difficult, particularly the elimination of traces of pyridine from triethyl phosphite.
Chlorination of the hydrogen phosphite gave 76 per cent of pure di-isopropyl phosphorochloridate (stage I I ) . ) By heating the phosphorochloridate, dissolved in a solvent such as dry benzene, with an inorganic fluoride such as dry sodium fluoride (stage I I I ) , pure di-isopropyl phosphorofluoridate was obtained in 90 per cent yield. Thus the phosphorofluoridate was obtainable in a pure condition by a three-stage process from phosphorus trichloride and isopropyl alcohol, and the overall yield was ca.
Manual of Explosives, Military Pyrotechnics, and Chemical Warfare Agents : Composition, Properties, Uses by Jules Bebie