Nitrogen development

Thioacetamide [62-55-5] M 75.1, m 112-113 , pK 13.4, Crystd from absolute diethyl ether or benzene. Dried at 70° in vacuum and stored over P2O5 at 0° under nitrogen. [Develops an obnoxious odour on storage, and absorption at 269nm decreases, hence it should be freshly crystd before use). 

CNC A chemical/biological process for oxidizing cyanide ion in wastewater. The waste-water is mixed with a proprietary soluble reagent and passed through a biological reactor in which cyanide is oxidized to carbon dioxide and nitrogen. Developed and offered by Radian Corporation, Austin, TX. 

WSA-SNOX A combined flue-gas treatment process which converts the sulfur dioxide to sulfuric acid and the nitrogen oxides to nitrogen. Developed by Snamprogetti and Haldor Topsoe, based on the WSA process. A large demonstration unit was under construction in 1989. 

As Schaffer has found 2.4.6-triphenyl-X -phosphorin 22 and other 2.4.6-tri-substituted X -phosphorins react smoothly with aryl diazonium salts in benzene. Nitrogen develops and the aryl residue bonds with the phosphorus. In presence of alcohols as nucleophiles, l-alkoxy-l-aryl-2.4.6-triphenyl-X -phosphorins 100 can be isolated. The aryl diazonium-tetrafluoroborate without any nucleophile in DMOE yields l-aiyl-l-fluoro-2.4.6-triphenyl-X -phosphorin 70i. As with other oxidants like halogen or mercury-Il-acetate, we suppose that in the first step triphenyl-X -phosphorin radical cation is formed. This could be shown by ESR spectroscopy. The next step may be a radical-radical addition to the X -phosphorin cation or a nucleophileradical addition respectively ... 

Brown color forms bubbles of nitrogen develop... 

In the end, spinnable nylon 6,6 proved easier to manufacture than tiiie polyesters since it did not require the use of a molecular still or extended reaction times. Further, the material balance between the diamine and diacid reactants was found to be conveniently achieved through formation of a 1 1 salt of the two reactants which permitted the ready synthesis of long chains of nylon 6,6. Finally, it was found that the initial degradation of nylon 6,6 was oxygen dependent and could be prevented through iiie use of ultrapure "Seaford" nitrogen developed for blanketing hot nylon 6,6. 

Similarly, the equilibrium constants for the formation of the tetrahedral intermediates, T, have been obtained. These vary substantially with the basicity of the amine from 4x 10 M" for 2-cyanoethylamine to 9x 10" M for propylamine. The Bronsted 3 uj-value for the equilibrium is 0.9. This provides experimental support for the Bronsted P-value of 1.0 that is often postulated for the formation of the tetrahedral intermediate from amines and carbonyl groups in which the amine nitrogen develops a unit positive charge, and presumably resembles the conjugate acid of the amine in structure and in its stability dependence upon substituents. Similar observations have been made in the aminolysis of cephalosporins (Page and Proctor, 1984), and these are discussed in Section 12. 

Foundation and Foundation fracture Modular titanium stem humeral prostheses with keeled and pegged UHMWPE glenoid components sterilized by gamma in nitrogen. Developed with Drs. Richard Friedman and Mark Frankie, it is intended for primary, hemiarthroplasty, total, and fracture use with cemented and press-fit fixation. 

Manner, H. I. Morrison, R. J. (1991). A temporal sequence (chronosequence) of soil carbon and nitrogen development after phosphate mining on Nauru Island. Pacific Science, Vol. 45, No. 4, pp. 400-404, ISSN 0030-8870... 

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