Nitric oxide definition

There is no room within the definition for nitric oxide, the prostaglandins and steroids mainly because they are not released in a controlled manner by neuronal activity and only the last are preformed. Thus if they are to be classified as NTs then the definition must be simplified so that a NT becomes ... 

Aldehydes may also be thought of as photochemical oxidants. The definition here becomes a bit hazy, because aldehydes in themselves are photooxidative reactants, as well as secondary pollutants that have adverse health effects. Referring to Figure 4-4, we note that aldehyde concentration throughout the day in Rome, Italy, seems to decay at roughly the same rate as the nitric oxide concentration. It would be expected to track the reactive fraction of the hydrocarbons, and this is also borne out approximately by the Rome data. A maximal formaldehyde concen-... 

The role of biomass in the natural carbon cycle is not well understood, and in the light of predictions of a future atmospheric energy balance crisis caused by carbon dioxide accumulation, in turn the result of an exponential increase in the consumption of carbon fuel, the apparent lack of concern by scientists and policy makers is most troubling. Yet there is no other single issue before us in energy supply which will require action long before the worst effects of excess production will be apparent. The only satisfactory model is the action taken by the R D community with respect to the SST in nitric oxide potential and chloro-halocarbon emissions, when it was realised that the stratospheric ozone layer was vulnerable to interference. Almost all other responses to pollution" have been after definitive effects have become apparent. 

THE ENERGY OF ACTIVATION have been made, and which is said to have been retarded by drying, is the union of nitric oxide and oxygen. But this is equally definitely stated to proceed just as well in the absence of water, f... 

The velocity was measured manometrically, definite quantities of nitric oxide and oxygen being allowed to stream into a vacuous vessel, which was provided with a bromnaphthalene manometer, protected from the oxides of nitrogen by an air-buffer. 

The electrophilic attack of nitric oxide on a bent nitrosyl is now realized to be the path by which hyponitrite-bridged Co species are formed. Reaction (93) was known since the time of Werner (217), but the black and red isomers of [Co(NO)(NH3)5]2+ obtained from this reaction defied definitive characterization for many years. It has now been established that the black isomer is a mononuclear, octahedral complex of Co(III) and NO- (218) while the red isomer is a hyponitrite bridged system containing two Co(III) ions (219). 

The hypothesis of the thermal nature of the oxidation of nitrogen leads to definite conclusions as to the relation between the formation and decomposition of nitric oxide in an explosion and the equilibrium concentration of nitric oxide at the explosion temperature. The equilibrium concentration may be computed independently from thermochemical data. The first task confronting us was to check up on these relations. 

Using this expression which refers to definite conditions and knowing how the cooling rate depends on these conditions (dimensions of the vessel, pressure, composition of the explosion products), we can compute the yield of nitric oxide in any case. Tm and [NO] are computed thermodynamically, kmrl by formula (8.8) we take into consideration the difference between r under the conditions of the given experiment and in the series of experiments on which the derivation of (8.8) was based. Then from the curve of Fig. 14 we find NO/[NO] corresponding to the new (because of the different t) value of UNO]r. 

Substituting the law of cooling and our definition of r into Arrhenius expression for the temperature dependence of the reaction rates and the equilibrium amount of nitric oxide, we find ... 

They did not measure the dissociation press, at higher temp., and added that the dissociation does not proceed until a definite dissociation press, has been attained and then ceases as is commonly the case rather does the dissociation press, exhibit a continuous slow change. This is explained by assuming that chromium and its nitride form not two phases, but only one variable phase. J. Feree made the nitride contaminated with a little oxide by heating pyrophoric chromium in a current of nitric oxide and he also obtained this nitride by the action of ammonia on heated chromium. 

G. Baume and M. Robert found that pure nitrogen trioxide can only exist at very low temp, in the solid state or in the liquid state under press, of nitric oxide. At temp, above —100°, it dissociates. It is not possible to distil it in a vacuum because of the immediate formation of an atmosphere of nitric oxide at temperatures at which distillation is possible. The blue liquid has no definite b.p., and by interpolation from the vap. press, curves between —80° and 35°, it is inferred that the b.p. is —27° at 760 mm. By prolonged drying over phosphorus pentoxide,... 

A reaction has an elementary rale law if the reaction order of each species is identical with the stoichiometric coefficient of that species for the reaction as written. For example, the oxidation of nitric oxide presented above has an elementary rate law under this definition, while the phosgene synthesis reaction does not. Another example of this type of reaction with an elementary rate law is the gas-phase reaction between hydrogen and iodine to form hydrogen iodide ... 

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