Nickel additive effects

Fig. 3.51 Effect of nickel additions to cast iron in reducing corrosion by caustic alkalis...

Fig. 8.17 Effects of applied potential upon the time to failure ratio in slow strain rate tests of C-Mn steel, with and without a 6% nickel addition, in boiling 8 m NaOH, 1 m NaFICOj + 0.5 m Na2COj at 75°C, and boiling 4.4m MgCl2 (after Parkins elat and...

Pretreatment with the Type I substrate, ethylmorphine, resulted in 100% mortality in both rats and mice, and aminopyrine pretreatment resulted in 100% and 64% mortality in rats and mice, respectively, exposed to disulfoton (Pawar and Fawade 1978). Nickel chloride, cobalt chloride, or cycloheximide decreased the levels of cytochrome bs, cytochrome c reductase, and total heme in rats (Fawade and Pawar 1983). These electron transport components were further decreased in rats pretreated with these inhibitors and given a single dose of disulfoton. Data from this study suggests an additive effect, since disulfoton also decreases the activities of these components. Evidence of an additive effect between disulfoton and these metabolic inhibitors was suggested by the decrease in ethylmorphine N-demethylase and acetanilide hydroxylase activities when rats were given an inhibitor followed by disulfoton. In another experiment, these inhibitors decreased the activity of delta-aminolevulinic acid synthetase, but this decrease was reversed when disulfoton was administered. 

For molyodenum catalysts, the suppression of the washings with water results in a three fold increase in the ratio k b /k bg, thus as an example the maximum citronellal yield over Mo rises from 88% to 95.5%. Although smaller the same effect is ooserved with pure nickel, this effect cannot De attributed to residual sodium iodide in UW catalysts, since the addition of iMaI to WW catalysts does not modify the selectivity. 

Atta-Aly, M.A. (1 999) Effect of nickel addition on the yield and quality of parsley leaves. Scientia Horticulturae 82(1-2), 9-24. 

The combustion tests done using a rocket motor demonstrate a typical T combustion instability. Double-base propellants composed of NC-NG propellants with and without catalyst (1 % nickel powder) are burned. The detailed chemical compositions of both propellants are described in Section 6.4.4 of Chapter 6. The burning rate characteristics are shown in Fig. 6-28. No effect of the nickel addition on burning rate is seen and the pressure exponent is n= 0.70 for both propellants. 

Other transition metals, nickel and cobalt, also promoted gasification (Figure 14) with their activity being comparable to that of iron. Nickel was effective from the onset of the exposure to water vapour, as the hydrogen released by the oxidation was sufficient to ensure that the element was completely reduced. In contrast, cobalt oxide, formed by decomposition of the acetate with which the sample was treated, was only reduced to the elemental state on the addition of hydrogen to the gas phase such that PH2/pH20 exceeded that (0.04) at which the oxide was no longer thermodynamically stable. 

Harada, T., Imachi, Y., Tai, A, and Izumi, Y. (1982) Modification of nickel surface with optieally active substrate the method and meehanism, a Metal-Support and Additive Effects in Catalysis, me k, B. et al. (eds.), Elsevier, Amsterdam, pp. 377 - 384. 

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