Behavioural inhibition

Inhibition of mucociliary activity Enhanced memory retention Suppression of glutamate release Suppression of noradrenaline release Inhibition of consumatory behaviour Inhibition of adenylate cyclase Elevation of intracellular calcium... 

A compound 148 which shows stomach secretion inhibition (80EUP48555) and the aminotriazolopyridine 149 (90JHC1649) are reduced catalytically to the 5,6,7,8-tetrahydro derivatives. The polarographic behaviour of Trazodone has been studied (87M12). The quaternary salts 150 are reduced by borohydride to the 4,5,6,7-tetrahydro derivatives (94ZOK440). 

Awad, S. A. and Kamel, K. M. Behaviour of Tin as Metal-metal Phosphate Electrode and Mechanism of Promotion and Inhibition of its Corrosion by Phosphate Ions , Journal of Electroanalytical Chemistry, 24, 217-25 (1969)... 

The mechanisms of corrosion by steam are similar to those for water up to 450°C, but at higher temperatures are more closely related to the behaviour in carbon dioxide. Studies at 100°C have demonstrated that uranium hydride is produced during direct reaction of the water vapour with the metal and not by a secondary reaction with the hydrogen product. Also at 100°C it has been shown that the hydride is more resistant than the metal. Inhibition with oxygen reduces the evolution of hydrogen and does not involve reaction of the oxygen with the uranium . Above 450°C the hydride is not... 

Where possible, some form of continuous monitoring should be employed, although it must be remembered that the results from monitoring devices, probes, coupons etc., refer to the behaviour of that particular component at that particular part of the system. Nevertheless, despite this caution, it must be recognised that the monitoring of the corrosion condition of an inhibited sysem is a well-established procedure and widely used (10 26-10 32). 

The corrosion of iron (or steel) can be inhibited by the anions of most weak acids under suitable conditions " . However, other anions, particularly those of strong acids, tend to prevent the action of inhibitive anions and stimulate breakdown of the protective oxide film. Examples of such aggressive anions are the halides, sulphate, nitrate, etc. Brasher has shown that, in general, most anions exhibit some inhibitive and some aggressive behaviour towards iron. The balance between the inhibitive and aggressive properties of a specific anion depends on the following main factors (which are themselves interdependent). 

The need for temperature cycling should be taken into account when designing or conducting tests. The nature of the test vessel should be considered for tests in aqueous solutions at temperatures above about 60°C since soluble constituents of the test vessel material can inhibit or accelerate the corrosion process. An inhibiting effect of soluble species from glass, notably silica, on the behaviour of steel in hot water has been shown . Pure quartz or polymeric materials are often more appropriate for test vessel construction. 

Of an ion through the double layer towards the electrode and inhibits its transfer in the reverse direction or vice versa f< an, anodic process frequently experirtiental vajups of a aib approximately () 5. Tran assivity active behaviour of a metal atipotehtials, more positive than thbise ieading to passivity. 

A particle size effect has been detected by Chou and Olson [486] in the isothermal decomposition of isothiocyanatopentammine cobalt(III) perchlorate. Below a = 0.09, the larger crystals decompose relatively more rapidly than the smaller, whereas for a > 0.09, the reverse is true. This behaviour was attributed to enhanced nucleation in the larger particles due to strain, but this favourable factor was later offset by the inhibiting influence of the product ammonia which accumulated in the larger crystals. 

A variation of this approach has recently been provided by Lyakhov et al. [598] who, from measurements of water adsorption on CuS04 5 H20, on MgS04 7 H20, and on their respective dehydration products, discern a correlation between strengths of surface bonding and S—T behaviour. At low surface coverages, the mutual dipole—dipole repulsions in the adsorbed layer inhibit water loss, in part by a blocking action on loss of water of crystallization and in part by polarization effects which provide a... 

The behaviour [821] of AgN02 is closer to that expected of a nitro compound than a nitrite. Decomposition (308—363 K) yields Ag metal and N02. a—Time curves are sigmoid with a prominent linear region (0.15 < a < 0.45) but the Arrhenius plot was curved at >333 K. This was attributed to inadequate gaseous product removal. In contrast to the behaviour observed for most other solids, pre-irradiation with 7-rays inhibits subsequent thermal decomposition [829]. 

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