Containers nitric oxide

Storage stability Prior to use, systems to contain nitric oxide must first be purged with an inert gas. Where air contamination cannot be eliminated, stainless steel materials should be used. 

In the chemiluminescent detection of nitrogen oxides, a constant source of ozone reacts with a metered air sample containing nitric oxide. Fontijn et al. suggested that this method could also be used for ozone detection by using a constant nitric oxide source for reaction with ozone in the air sample. The ozone-nitric oxide reaction is carried out at reduced pressure, to avoid quenching the chemiluminescent reaction. Detection of the emission in the spectral r on involved (600-3,000 nm) requires using a near-infrared-sensitive photomultiplier tube. The noise of such a photomultiplier tube is reduced by cooling it to about - 20 C. ... 

Photooxidation of chlorobenzene in air containing nitric oxide in a Pyrex glass vessel and a quartz vessel gave 3-chloronitrobenzene, 2-chloro-6-nitrophenol, 2-chloro-4-nitrophenol, 4-chloro-2-nitro-phenol, 4-nitrophenol, 3-chloro-4-nitrophenol, 3-chloro-6-nitrophenol, and 3-chloro-2-nitrophenol (Kanno and Nojima, 1979). A carbon dioxide yield of 18.5% was achieved when chlorobenzene adsorbed on silica gel was irradiated with light (A. >290 nm) for 17 h. The sunlight irradiation of chlorobenzene (20 g) in a 100-mL borosilicate glass-stoppered Erlenmeyer flask for 28 d yielded 1,060 ppm monochlorobiphenyl (Uyeta et al., 1976). 

The decomposition of N02 to NO takes place considerably faster than the subsequent reactions of NO we axe thus justified in speaking of the reactions of NO, although actually the mixture contained N02 before the explosion. In computations of the theoretical explosion temperature of mixtures containing nitric oxide we have taken into consideration the energy spent on the reduction of N02 since this reaction precedes the reactions of NO which interest us. 

In this process (Fig. 1), the reactor contains a rhodium-platinum catalyst (2 to 10% rhodium) as wire gauzes in layers of 10 to 30 sheets at 750 to 920°C, 100 psi, and a contact time of 3 X 10"4 second. After cooling, the product gas enters the absorption tower with water and more air to oxidize the nitric oxide and hydrate it to nitric acid in water. Waste gases contain nitric oxide or nitrogen dioxide, and these are reduced with hydrogen or methane to ammonia or nitrogen gas. Traces of nitrogen oxides can be... 

Complexes Containing Nitric Oxide and Sulfur Donors 1191... 

The iron porphyrins and related compounds constitute an extremely important class of coordination complex due to their chemical behaviour and involvement in a number of vital biological systems. Over recent years a vast amount of work on them has been published. Chapter 21.1 deals with the general coordination chemistry of metal porphyrins, hydroporphyrins, azaporphyrins, phthalocyanines, corroles, and corrins. Low oxidation state iron porphyrin complexes are discussed in Section 44.1.4.5 and those containing nitric oxide in Section 44.1.4.7, while a later section in this chapter (44.2.9.2) is mainly concerned with iron(III) and higher oxidation state porphyrin complexes. Inevitably however, a considerable amount of information on iron(II) complexes is contained in that section as well as in Chapter 21.1. Therefore in order to prevent excessive duplication, the present section is restricted to highlighting some of the more important aspects of the coordination chemistry of the iron(II) porphyrins while the related unusually stable phthalocyanine complexes are discussed in the previous section. 

The same compound results when a dilute solution of potassium sulphide or sulphydrate is added to one of ferrous sulphate containing nitric oxide. 

The use of NO was successfully applied to Ru3(CO)i2 and Os3(CO)i2 to make the first carbonyl clusters containing nitric oxide as a ligand (12). The nitrosyl ligands bridge the same edge of the triangle in both... 

Gurevich VS, Lominadze DG, Adea ASO et al (1997) Antithrombotic and vasca-elaxant properties of a novel thetic RGD pqttide containing nitric oxide Pharmacol 55 1-9. 

Lefer DJ, Nakanishi K, Vinten-Johansen J (1993) Endothelial and myocardial cell protection by a cysteine-containing nitric oxide deaior after myocardial ischemia and reperfusion. J Cardiovasc Pharmacol 2 Suppl. 7) S34-S43. 

Clinical model Male. Name initials Z.D.D. 42 years old. Patient 5905/75 Data from the anamnesis After wreckage and spill of a significant quantity of concentrated nitric acid, the patient inhaled the evaporations in the air containing nitric oxide, he felt ill, with difficult breathing and pains behind the chest bone. 

Denitration. Denitration may be performed thermally on calcination and/or melting. No separate denitration equipment is then required. The penalty is that the off-gas contains nitric oxides and that ruthenium volatility may be promoted by the oxidizing environment. However, there is still debate about the significance of the latter effect. 

The group RuNO can occur in both anionic and cationic octahedral complexes in which it is remarkably stable, being able to persist through a variety of substitution and oxidation-reduction reactions. Ruthenium solutions or compounds that have at any time been treated with nitric acid can be suspected of containing nitric oxide bound to the metal. The presence of NO may be detected by infrared absorption ca. 1930-1845 cm-1. 

Gou, J.-P., Milhoan, K. A., Tuan, R. S., and Lefer, A. M. (1994). Beneficial effect of SPM-5185, a cysteine-containing nitric oxide donor, in rat carotid artery intimal injury. Circ. Res. 75, 77-84. 

In addition to cytochrome c oxidase, a protein complex having a very similar fold and arrangement of metal centers is that of the heme-containing nitric oxide reductase (NOR). This protein complex is found in a number of anaerobic bacteria and archaea, including Para coccus cfe/ /7/i5cans, Bacillus azotoformans and Pyrobaculum sero/ Mu/w, and carries out the enzy matic reaction 2NO + 2e + 2H+ = N2O + H2O. (Although this is only a 2-electron reduction, NORs can also reduce O2 to 2H2O, a 4-electron reduction, and at least several CcOs can reduce 2NO to N2O + H2O, a... 

FUNGAL P450-CONTAINING NITRIC OXIDE REDUCTASE... 

Nitric oxide donors [sodium nitroprusside, S-nitroso-N-acetyl-D,L-penicillamine or l-hydroxy-2-oxo-3-(N-methyl-6-aminohexyl)-3-methyl-l-triazene = NOC-9] did not affect the activities of non-specific alkaline phosphatase and non-specific esterase in rat and mouse kidney proximal tubulo-cytes which do not contain nitric oxide synthase I (Dahrmann etal. 1997). However, the activities of succinate dehydrogenase (EC 1.3.99.1), cytochrome c oxidase (EC 1.9.3.1), catalase (EC 1.11.1.6), peroxidase (EC 1.11.1.7), and cholinesterase (EC 3.1.1.7) and different types of adenosine triphosphatase (EC 3.6.1.3) were found reduced. 

Transition metal compounds containing nitric oxide as a coordinated ligand are normally called nitrosyl complexes. However, the term nitrosyl , is only sometimes restricted specifically to complexes which can be regarded as containing a three-electron metal-nitric oxide bond, and the term seems to be used generally for all nitric oxide compounds. Although there are many transition metal-nitrosyl complexes, relatively few also contain metal-carbon linkages and therefore fall within the subject of this chapter. 

---