British Abstracts: Pure chemistry and physiology. ser. A1940 |
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... approx . of the second order . The energy of activation is negative , 2000 g . - cal . The steric factor is 10-7- 10-8 . Probably the first stage is COS + NH , SCONH , ( slow ) ; then follows SCONH , + NH2 NH2 CO SNH , ( I ) ( rapid ) ...
... approx . of the second order . The energy of activation is negative , 2000 g . - cal . The steric factor is 10-7- 10-8 . Probably the first stage is COS + NH , SCONH , ( slow ) ; then follows SCONH , + NH2 NH2 CO SNH , ( I ) ( rapid ) ...
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... approx . const . after 2-2.5 hr . The wt . of Si formed after 30 min . heating is approx . ∞ the wt . of Al in the initial mixture , and if SiO2 is in excess the Al - Si alloy produced has approx . const . composition . The equilibrium ...
... approx . const . after 2-2.5 hr . The wt . of Si formed after 30 min . heating is approx . ∞ the wt . of Al in the initial mixture , and if SiO2 is in excess the Al - Si alloy produced has approx . const . composition . The equilibrium ...
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... approx . equal , whilst for p- CH Me SO2H as catalyst at 109 ° the rate coeff . for polyesterification is 11 times the rate coeff . for alcoholysis , the activation energies being 12 , 150 , and 11,150 g . - cal . , respectively ...
... approx . equal , whilst for p- CH Me SO2H as catalyst at 109 ° the rate coeff . for polyesterification is 11 times the rate coeff . for alcoholysis , the activation energies being 12 , 150 , and 11,150 g . - cal . , respectively ...
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EXPERIMENTAL PHYSIOLOGY | |
1940 | 1 |
CHEMISTRY AND RELATED SUBJECTS | |
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absorption absorption spectra Acad acid activation energy activity adsorbed alkali alloys Amer Anal analysis approx ation atoms Atti X Congr bands calc catalyst CCl4 Chem chemical Chim chloride CO₂ coeff colloidal compounds Compt concn const crystals curves decomp decreases described determined deuterons diffusion discussed dissociation effect electrolytes electron emission energy equation equilibrium EtOH Faraday Soc ferromagnetic film formation gases H₂ H₂O heat hydrogen hydrolysis increases intensity ionisation ions isotopes kg.-cal lattice layer liquid magnetic Me.v measured meson mesotrons metals method mixtures N₂ neutrons obtained oxidation paramagnetic particles phase Phys Physical Rev polarisation potential pptd pressure Proc protons Raman reaction rend Russ salts SiO2 solid solid solution solubility solutions solvent spectra spectrum structure surface temp theory thermal titration Trans vals vapour velocity viscosity X-ray