Correlations with other metals

Adsorption modes and hydrogenolysis were also correlated with other metal-catalyzed reactions. Gault noticed striking similarities in product distributions of isomerization and ring opening of cycloalkanes. Kinetic and tracer studies provided useful data252 268 to arrive at the conclusion that a common surface intermediate is... 

For the other metals, Hg correlates with Zn, Pb and Cd at SC but not at CBL. Similarly, Hg did not correlate with other metals in Florida (30). The metals Cu, Ni and Cr are strongly correlated at both sites. Mercury, which is transported globally, also likely has a two component signal from local sources -coal combustion emissions and waste (medical and municipal) incineration while Pb and Cd have their primary sources as waste incineration (P, II). The overall inter-relationships of Pb, Cd and Hg suggest that overall, in the city, Pb and Cd do have different sources. The metals Pb, Cd, Cu and Zn are well correlated at CBL (Table III). This suggests that the correlations found for Hg at SC reflect the urban sources and not the regional picture. 

Secondary Ion Mass Spectroscopic Studies of Adsorption and Reaction at Metal Surfaces Correlations with Other Surface-Sensitive Techniques... 

All compounds described in this report have been well characterized by means of IR and NMR spectroscopy. Most valuable is the coupling constant J(WSi) which, as has been demonstrated for J(WP) [17], can be correlated with the s-electron density of the main group element transition metal bond (e. g. J(WSi) = 44.7 Hz (21i), 71.1 Hz (22b)). Related studies concerning metallo-silanols and siloxanes with other metals of groups 6 and 8 are in progress. 

Analysis of trends in transition metal chemical shifts was in most cases attempted by exploring statistical correlations with other observable spectroscopic quantities such as ligand atom chemical shifts or metal-ligand coupling constants... 

However, some of the parameters have also been refined against thermodynamic and/or spectroscopic data. Thus, the hexaaminecobalt(III) force field leads to accurate structural and thermodynamic predictions. Since all parameters are highly correlated, i.e., the parameterization of the ligands and that of the chromophore, the prediction of thermodynamic properties of complexes with other metal centers is also expected to be reasonably accurate. However, this may have to be tested separately for each set of compounds. 

Perhaps the most meaningful comparison in Table 1 is between column (i) [or column (ii)] and colunm (vi). Although there is obviously some scatter in the data, one can discern a definite trend, in which an increasing H-H distance appears to be correlated with decreasing metal-ligand distance in other words, experimental evidence for the... 

At the other end of the spectrum, combined X-ray (fluorescence, absorption and diffraction) and IR microscopic analyses on the same sample represent an activity of growing interest among the biomedical community. For example, protein mis-folding has been correlated with trace metal uptake in Alzheimer s disease [32], Parkinson s disease [91], scrapie [36] and amyotrophic lateral sclerosis [91], Likewise, in human hair the protein and lipid composition of the cuticle, cortex and medulla have been correlated with trace metal content associated with mummification techniques [74], and with environmental metal exposure [92]. 

The surface tension of solids and liquids can be measured by a variety of techniques, or it may be obtained by correlation with other thermodynamic properties. For metals, excellent correlations between 7 and the heat of sublimation can... 

David and Aim s analysis also provided data about the transition metals that mostly fit with the other two analyses. They say that proteins used iron, zinc, and manganese at first, followed by cobalt and nickel. Only later do molybdenum and copper proteins appear, so they appear in later chapters in this book. Oxygen chemistry correlates with these metals like it does with the nitrogen and sulfur compounds. 

The effects of the ions on the structure of the water were then described by Marcus [51, 53] as the ratios AG bj, = A i" °according to Equation 5.13. The water stracture effects of ions according to this approach are shown in Table 5.2 — structure makers having positive values and structure-breakers negative values. These results are unsatisfactory, due to the inaccuracy of the AjU,°° ° data, making the divalent cations Ba and Cd appear as strong water-structure breakers and LP as a mild structure breaker, contrary to aU other information concerning these ions. The available data for the nine alkah metal and hahde ions appear to be the most accurate, and their correlations with other quantities that describe the water structural effects of ions are ... 

The difference between intralayer and interlayer distances is even smaller than in the As-type elements. In other words, the layer character is almost lost. This may be correlated with the metallic properties of these phases. Since an element with three bonding electrons is replaced by an element with (two or) four bonding valence electrons the metallic properties are by no means surprising. Less obvious, however, is the reason why these phases form at all. This structure appears to be much more suited for AsPs or SbPa. 

Unlike double base and composite propellants, the combustion rate of Magnesium/Teflon/Viton (MTV) does not correlate with the adiabatic combustion temperature, which has its maximum at (Mg) = 0.32. The combustion rate of MTV, however, correlates with the metal content as is observed for many other pyrolants such as Mg/NaNOs [1], Ti/KN03 and Zr/KNOs [2]. Thus, it increases exponentially with f (Mg) up to stoichiometries between 55 and 70%. The peak range appears to depend on the surface area of both Mg and polytetrafluorethylene (PTFE) particles applied [3-5]. 

In addition to studies on the effects of salinity, which are by definition confined to marine and estuarine species, two studies have been made of the effects of hardness on mercury toxicity to freshwater species. Carter and Cameron (1973) using the protozoan Tetrahymena pyrU formis and Tabata (1969) using the killifish concluded that there was no correlation between hardness and mercury toxicity. This is contrary to the situation with other metals, i.e, zinc and copper. 

Monk, P.M.S., Ali, T., and Partridge, RX). (1995) The effect of doping electrochromic molybdenum oxide with other metal oxides correlation of optical and kinetic properties. Solid State Ion., 80 (1-2), 75-85. 

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