Effect of Cobalt

Cobalt is invariably present in commercial MH battery electrodes. It tends to increase hydride thermodynamic stability and inhibit corrosion. However, it is also expensive and substantially increases battery costs thus, the substitution of Co by a lower/cost metal is desirable. Willems and Bu.schow [40] attributed reduced corrosion in LaNi j, Co, (jf=l-5) to low V. Sakai et al. [47] noted that LaNi25Co25 was the most durable of a number of substituted LaNij. Co alloys but it also had the lowest storage capacity. 

The results of a. systematic study of the effect of Co in an alloy series corresponding to LaNi43 jCo Mno4Al 3 are shown in Fig. 13 and summarized in Table 6 and graphically in Fig. 14. The correlation between expansion and corrosion is rather weak e.g., even though the H content is unchanged. It is thus likely that corrosion inhibition by Co is also due to a surface effect as with Ce. In this connection Kanda et al. [48] found evidence that Co sup- 

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In the previous section efficient catalysis of the Diels-Alder reaction by copper(II)nitrate was encountered. Likewise, other bivalent metal ions that share the same row in the periodic system show catalytic activity. The effects of cobalt(II)nitrate, nickel(II)nitrate, copper(II)nitrate and zinc(ll)nitrate... 

Effect of Cobalt on Photoactivity of Commercial Titanium Dioxide Pigments... 

McLaren R.G., Lawson D.M., Swift R.S., Purves D. The effects of cobalt additions on soil and herbage cobalt concentrations in some S. E. Scotland pastures. J Agri Sci 1985 105, 347-363. 

Hertz, Y., Z. Madar, B. Hepher, and A. Gertler. 1989. Glucose metabolism in the common carp (Cyprinus carpio L.) the effects of cobalt and chromium. Aquaculture 76 255-267. 

Oskarsson, A., M.C. Reid, and F.W. Sunderman, Jr. 1981. Effects of cobalt chloride, nickel chloride, and nickel subsulfide upon erythropoiesis in rats. Ann. Clin. Lab. Sci. 11 165-172. 

Handl, J. and A. Pfau. 1989. Long-term transfer of 1-129 into the food chain. Sci. Total Environ. 85 245-252. Handl, J., A. Pfau, and F.W. Huth. 1990. Measurements of 129I into the food chain. Health Phys. 58 609-618. Hanson, L.H. 1990. Sterilizing effects of cobalt-60 and cesium-137 radiation on male sea lampreys. North Amer. Jour. Fish. Manage. 10 352-361. 

A. Sirijaruphan, A. Horvath, J. G. Goodwin, Jr and R. Oukaci, Cobalt aluminate formation in alumina-supported cobalt catalysts effects of cobalt reduction state and water vapor, Catal. Lett., 2003, 91, 89-94. 

The EXAFS data recorded after exposure to air of the unsupported Co-Mo catalysts with different cobalt content allow one to examine the effect of cobalt. In spite of a great uncertainty in the coordination numbers, the promoted catalysts seem to have a somewhat smaller domain size than the unpromoted catalyst as indicated both by the smaller second shell coordination numbers and by the larger effect of air exposure (i.e., reduced sulfur coordination number in first shell). This influence of cobalt on the domain size may be related to the possibility that cobalt atoms located at edges of M0S2 stabilize the domains towards growth in the basal plane direction. Recent results on C0-M0/AI2O3 catalysts indicate that Co may also have a similar stabilizing effect in supported catalysts (36). 

Table 6w4 Effect of Cobalt(lll) Coordination on Rate Constants for Base Hydrolysis of Amino Acid Amides...

Cugell DW, Morgan WKC, et al The respiratory effects of cobalt. Arch Intern Med 150 177-183, 1990... 

Domingo JL, Paternain JL, Llobet JM, et al Effects of cobalt on postnatal development and late gestation in rats upon oral administration. Rev Esp Fisiol 41 293-298, 1985... 

Cornell, R.M. Giovanoli, R. (1989) Effect of cobalt on the formation of crystalline iron oxides from ferrihydrite in alkaline media. Clays Clay Min. 37 65-70... 

Figure 4. Effect of cobalt-60 irradiation on pituitous-ness of 5% aqueous solutions of dry irradiated Poly ox...

Experiment 1. Effect of Carbon Catalyst on Oxidation of Cobalt(ll) to Cobalt (III) and Formation of Ethylenediamine and Effect of Cobalt on Formation of Ethylenediamine. Carbon dioxide-free air was bubbled through the reaction mixture. Nine determinations each of the amounts of ammonia volatilized, the ethylenediamine concentration, and the cobalt (II) concentration were made over a period of 18 hours. The results are shown in Figure 1. 

Figure 1 shows the effect of cobalt and activated carbon on the rate of formation of ethylenediamine from N-hydroxy ethylethylenediamine upon aeration of a hot aqueous solution. When both cobalt and carbon are present in the reaction solution, the rate of formation of ethylenediamine is approximately five times greater than when cobalt is present but carbon is absent, and about 19 times greater than when cobalt is absent and carbon is present. 

Table II, Effect of Cobalt Anion and of Solvent Acid on Oxidation Rate of 4.07M Ethylbenzene with 2 X 10"2M Cobalt and 4 X 10"2M NaBr in Acetic Acid at 65°C.

Hendlin, D. and Ruger, M. L. 1950. The effect of cobalt on the microbial systhesis of LLD-active substances. Science 111, 541-542. 

K. Ratzke, A. Heesemann, and F. Faupel. The vanishing isotope effect of cobalt diffusion in Fe3gNi4oB2i glass. J. Phys. Condens. Matter, 7(39) 7663—7668, 1995. 

Reinoso-Garcra, M.M., Verboom, W., Reinhoudt, D.N., Brisach, R, Arnaud-Neu, R, Liger, K. Solvent extraction of actinides and lanthanides by CMP(O)- and N-acyl(thio) urea-tetrafunctionalized cavitands Strong synergistic effect of cobalt bis(dicarbollide) ions. Solvent Extr. Ion Exch. (2005), 23 (3), 425-437. 

Coupez, B., Wipff, G. The synergistic effect of cobalt-dicarbollide anions on the extraction of M3+ lanthanide cations by calix[4]arenes A molecular dynamics study at the water- oil interface. C.R. Chimie (2004) 7(12), 1153-1164. 

In the previous experiment, where the effect of cobalt contents on steel tensile strength was researched, we are now trying to find out the effect of three percentile contents of cobalt on this response if each alloy was tempered in each of four furnaces. Twelve alloy batches were divided into three samples each, so that the tensile strength for 36 samples were measured. These values in thousands of PSI for measurements or determinations are shown in Table 2.51. Do the analysis of variance. 

Coupez, B., Wipff, G. (2004), The Synergistic Effect of Cobalt-dicarbollide Anions on the Extraction of M Lanthanide Cations by Calix[4]arene-CMPO ligands a Molecular Dynamics Study at the Water-"oil" Interface, C. R. Chimie Acad. Sc. Paris, in press. 

Mechanism of polymerization of methyl methacrylate (MMA) was studied by means of isotope effects. Deuterium isotope effect of cobalt porphyrin catalysed... 

Table X. Effect of Cobalt Salt on Butadiene Polymerization ...

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