Kazimierz Karlowski

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Nitrous acid (HNO2) was partly extracted from water by organic solvents, especially polar ones. Carbaryl was nitrosated in solvent: water mixtures most rapidly when nonpolar solvents, e.g. methylene chloride, carbon tetrachloride and hexane, were used. Under given conditions, carbaryl was nitrosated in methylene chloride:water mixtures 20 times faster than(More)
Nitrosomethylurea (NMU) formation was measured radioactively in the stomach contents of rats fed 3H-methylurea and sodium nitrite, mostly in semi-synthetic diets. When methylurea and sodium nitrite were added to various diets, the NMU concentration, averaged over 1-4 hours after the food was presented, was 4.6 micrograms/kg stomach contents for low-protein,(More)