Nitrogen-rich

Alternatively, tows of fibers can be passed through a Hquid metal bath, where the individual fibers are wet by the molten metal, wiped of excess metal, and a composite wine is produced. A bundle of such wines can be consoHdated by extmsion to make a composite. Another pressureless Hquid metal infiltration process of making MMCs is the Prim ex process (Lanxide), which can be used with certain reactive metal alloys such as Al—Mg to iafiltrate ceramic preforms. For an Al—Mg alloy, the process takes place between 750—1000°C ia a nitrogen-rich atmosphere (2). Typical infiltration rates are less than 25 cm/h. 

A smaller factor in ozone depletion is the rising levels of N2O in the atmosphere from combustion and the use of nitrogen-rich fertilizers, since they ate the sources of NO in the stratosphere that can destroy ozone catalyticaHy. Another concern in the depletion of ozone layer, under study by the National Aeronautics and Space Administration (NASA), is a proposed fleet of supersonic aircraft that can inject additional nitrogen oxides, as weU as sulfur dioxide and moisture, into the stratosphere via their exhaust gases (155). Although sulfate aerosols can suppress the amount of nitrogen oxides in the stratosphere... 

Table 26-26 hsts some of the main commercial methods used to generate nitrogen or nitrogen-rich gas. 

TABLE 26-26 Commercial Methods Used to Generate Nitrogen or Nitrogen-Rich Gas... 

Processing Nitrogen-Rich, Hydrogen-Rich, and Olefin-Rich Gases with Physical Solvents, U.S. Patent 4,832,718. May 23, 1989. 

Processing Nitrogen-Rich Gases with Physical Solvents, U.S. Patent... 

The cyclic [SaNs]" cation (5.13), a six r-electron system, is the only example of a nitrogen-rich, binary S-N cation. The thermally stable salt [SaNslaiHgaCle] is obtained from the reaction of (NSC1)3 with HgCla in CHaCla. The bond lengths in the five-membered ring indicate delocalized r-bonding that is attenuated across the S-S bond. 

The simplest chain compounds of the type RS NyR are the sulfur diimides RNSNR (Section 10.4) The other known thiazyl chains are summarized in Table 14.1. They can be conveniently classified as sulfur-rich, nitrogen-rich or even-chain species. 

Another way of demonstrating currently achievable performance with the above system is shown in Table 13. Here, the peak counts/sec from a typical empty suitcase, leather attache case, and the leather attache case containing six sticks of Dynamite are compared to the background level. The attache case, in both cases, was also filled with common nitrogen-rich materials such as wool, vitamins Bj and B12t pills, rayon, saccharin, silk and other materials such as paper, cotton and brass ... 

Expls may be classified both from the chemical point of view and according to their uses. From the chemical viewpoint we distinguish between chemical individual substances and mixts. The former are divided into (1) nitro compds, (2) nitric esters, (3) nitramines, (4) derivatives of chloric and perchloric acids, (5) azides, and (6) various compds capable of pro-during an expln, for example fulminates, acetyl-ides, nitrogen rich compds such as tetrazene, peroxides and ozonides, etc... 

The rate of ammonia production was enhanced by more than 1100% in the nitrogen rich regime (Figs 9.33 and 9.34), upon potential application of -IV between the working electrode and the Ag reference electrode. The extent of the NEMCA effect depends strongly on the kinetic regime of the reaction. Very pronounced non-faradaic behavior is observed in the regime 0.33

[Pg.470]

Popov, C., Zambov, L. M., Plass, M. R, and Kulisch, W., Optical, Electrical and Mechanical Properties of Nitrogen-rich Carbon Nitride Films Deposited by Inductively Coupled Plasma Chemical Vapor Deposition," Thin Solid Films, Vol. 377-378,2000, pp. 156-162. 

For the generation of more nitrogen-rich compounds, a nitride is included in the reaction. This synthesis allows the formation of different nitridoborate (8) ions as well as nitridoborate nitrides (9) [26] ... 

Metal-rich compounds are readily obtained when a metallothermic reduction is included into the metathesis reaction by using an electropositive metal (10). In addition, metal-rich and nitrogen-rich compounds are obtained when a metal and a metal nitride are employed in reactions (11, 12) ... 

The diffraction pattern obtained in the detector plane when the beam scan in a STEM instrument is stopped at a chosen point of the image comes from the illuminated area of the specimen which may be as small as 3X in diameter. In order to form a probe of this diameter it is necessary to illuminate the specimen with a convergent beam. The pattern obtained is then a convergent beam electron diffraction (CBED) pattern in which the central spot and all diffraction spots from a thin crystal are large discs rather than sharp maxima. Such patterns can normally be interpreted only by comparison with patterns calculated for particular postulated distributions of atoms. This has been attempted, as yet, for only a few cases such as on the diffraction study of the planar, nitrogen-rich defects in diamonds (21). 

Kind R (2007) Evidence for Ferroelectric Nudeation Centres in the Pseudo-spin Glass System Rbi x(ND4)xD2P04 A 87Rb NMR Study. 124 119-147 Klapotke TM (2007) New Nitrogen-Rich High Explosives. 125 85-121 Kobuke Y (2006) Porphyrin Supramolecules by Self-Complementary Coordination 121 ... 

Rice BM, Byrd EFC, Mattson WD (2007) Computational Aspects of Nitrogen-Rich HEDMs. 125 153-194... 

Fig. 1. A comparison of the 3990-4050 A regions for the nitrogen rich stars B 32 and B 04 in NGC 330, the nitrogen normal star AV304, and the Be star B 12. The Hel lines at 4009 and 4026 A are marked together with the NII lines at 3995, 4041 and 4043 A. Note the strength of the NII line at 3994 A in B12, which is significantly weaker than in the other stars. The element shows under-abundances of —0.35 relative to AV 304.

Jess, A., Popp, R., Hedden, K. 1999. Fischer-Tropsch-synthesis with nitrogen-rich syngas—Fundamentals and reactor design aspects. Applied Catalysis A General 186 321-42. 

Triazoles have also been incorporated into metallo phthalocyanines and the photophysical properties of the nitrogen-rich heterocycles elucidated <2001JOC89>. 

Fig. 5.13. Time evolution of the chemical profile of a 40 Mq star that becomes a Wolf-Rayet star as a result of the outer layers peeling off in stellar winds. The spectrum evolves from type O to type B to a red supergiant (RSG) and then back to a blue supergiant (BSG) and towards increasing effective temperatures ending up well to the left of the main sequence. The chemically modified spectrum evolves from nitrogen-rich late, i.e. relatively cool (WNL), to nitrogen-rich early (WNE) to carbon-rich (WC) in some cases still hotter stars are observed that are oxygen-rich (WO). After Maeder and Meynet (1987).

Nitrogen-rich waste C/N ratio Carbon-rich waste C/N ratio... 

Keywords Tetrazoles Tetrazines High energy density materials Nitrogen-rich compounds Energetic materials... 

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