Basicity-dependent property plots

In contrast, the acidity function approach, which involves a study of the dependence of the ionisation ratio ([S ]/[HS]) on an appropriate acidity function, was recently used for substituted acetophenones and some aliphatic ketones (Cockerill et al., 1974 Earls et al., 1975 Kankaanpera et al., 1978). All these studies used the property that the addition of DMSO increases the basicity of aqueous hydroxide ion solutions p/ s values were determined from (46) by plotting the ionisation ratio versus the H acidity function for... 

In Fig. 7, the do values obtained for MgO, AI2O3 and MgyAlOx oxides were plotted as a function of the density of basic sites, nb (Table 1). It is observed that the initial deactivation correlates linearly with the density of basic sites. No correlation was found between the NH3 site density (n,. Table 1) and do. These results show that although Mg AlOx oxides promote the selfcondensation of acetone by both acid- and base-catalyzed pathways (Fig. 2), the initial deactivation rate is essentially related to the surface basic properties. This dependence of do with nb for MgyAlOx oxides probably reflects the fact that the acetone oligomerization rate decline is significantly higher when coke poisons very active basic Mg-0 pairs than when eliminates moderately active acidic Al-0 pairs. 

Figure 4 shows the survey of different t)q)es of nonlinear hyperbolic inhibition mechanisms and their characteristics. A basic property of aU nonlinear mechanisms, shown in Fig. 4, is that the double reciprocal plot of i/uq versus /A, in the presence of different constant concentrations of an inhibitor is a family of straight lines with a common intersection point. This common intersection point is found either in the I, in, or in the IV quadrant, depending on the mechanism only in Case 5 (hyperbolic uncompetitive type), the double reciprocal plot is a family of parallel straight lines without a common intersection point. 

For Langmuir films, surface pressure is plotted against the area per molecule (A), resulting in n-A isotherms. The pattern of such isotherms depends not only on the chemical structure of the film-forming substance, but also on experimental conditions. The increase in surface pressure corresponds to more ordered phases in the film. The n-A isotherm of a monolayer provides basic information on the material s film-forming properties and the area per molecule at different stages of film compression. Additionally, conclusions may be drawn on the presence and... 

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