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Complex expression

M refer to the density and molecular weight of /, and R is the gas constant. For simplicity, we assume each component to be monodisperse mote complex expressions result when polydispersity is considered (6). This model also assumes the heat of mixing pet unit volume follows a van Laar-type relation where B is... [Pg.409]

However, more complex expressions have been proposed (9). [Pg.496]

Thermo- dynamic Depth Dynamic Complexity expressed purely ais a function of physical quantities Hard to compute in general... [Pg.615]

In computer operations with other kinetic systems, Equation 8 may be used, and all the unique features of the kinetic system may be incorporated into the value of Q which may of course be a very complex expression. This technique is of interest only in that it simplifies the work necessary to analyze data using any specific kinetics for a chemical reaction. The technique requires sectioning the catalyst bed in most cases with normal space velocities, 50-100 sections which require 2-3 min of time on a small computer, appear to be sufficient even when very complex equations are used. [Pg.73]

Although in principle a powerful and elegant method, the position-space renormalization group method yields very complex expressions for the renormalized... [Pg.246]

When in some more complex cases, Cp and AH are functions of temperature, then the substitutions would be as shown in Case C of Sec. 1.2.5.3. This general form, which may give rise to very complex expressions, may be important for gas phase reactions (see also Sec. 4.3.3). Simplifying by assuming only one reaction (R=l) and constant Cpi gives... [Pg.233]

In case of multilayer structures much more complex expressions result. [Pg.104]

The phase shifts by gradient pulses with delays in between [such as shown in Figure 2.9.1(c)] are represented by more complex expressions as published in Ref. [36]. [Pg.213]

Clearly, it would be best to avoid the need to have to make any assumptions about either the constancy of [G] or the relative magnitudes of [R T and [G]T. This can be done for the scheme of Eq. (1.38), and the outcome is a somewhat more complex expression for the concentration of AR G, which is obtainable from the roots of a quadratic equation ... [Pg.39]

These subtle additions to the reaction scheme, coupled with boundary conditions similar to those used by HWPH, led to the following more complex expression describing the relative flux of HA ... [Pg.130]

Tables 4.26 and 4.27 clearly reveal that the strength of metal-to-ligand pi-backbonding in MHmXY complexes (expressed in terms of either A M /2)... Tables 4.26 and 4.27 clearly reveal that the strength of metal-to-ligand pi-backbonding in MHmXY complexes (expressed in terms of either A M /2)...
Table 2.5, together with the subsequent worked examples, illustrates the application of the statistical tests to real laboratory situations. Equation (2.10) is a simplified expression derived on the assumption that the precisions of the two sets of data are not significantly different. Thus the application of the F-test (equation (2.8)) is a prerequisite for its use. The evaluation of t in more general circumstances is of course possible, but from a much more complex expression requiring tedious calculations. Recent and rapid developments in desk top computers are removing the tedium and making use of the general expression more acceptable. The references at the end of the chapter will serve to amplify this point. [Pg.634]

Here, Flffl are matrix elements of a zeroth-order Hamiltonian, which is chosen as a one-electron operator in the spirit of MP2. is an overlap matrix The excited CFs are not in general orthogonal to each other. Finally, Vf)(i represents the interaction between the excited function and the CAS reference function. The difference between Eq. [2] and ordinary MP2 is the more complicated structure of the matrix elements of the zeroth-order Hamiltonian in MP2 it is a simple sum of orbital energies. Here H is a complex expression involving matrix elements of a generalized Fock operator F combined with up to fourth-order density matrices of the CAS wave function. Additional details are given in the original papers by Andersson and coworkers.17 18 We here mention only the basic principles. The zeroth-order Hamiltonian is written as a sum of projections of F onto the reference function 0)... [Pg.255]

A more complex expression is obtained when the absorption and emission transition moments lie in a plane perpendicular to the axis of symmetry... [Pg.149]

A recently proposed semiclassical model, in which an electronic transmission coefficient and a nuclear tunneling factor are introduced as corrections to the classical activated-complex expression, is described. The nuclear tunneling corrections are shown to be important only at low temperatures or when the electron transfer is very exothermic. By contrast, corrections for nonadiabaticity may be significant for most outer-sphere reactions of metal complexes. The rate constants for the Fe(H20)6 +-Fe(H20)6 +> Ru(NH3)62+-Ru(NH3)63+ and Ru(bpy)32+-Ru(bpy)33+ electron exchange reactions predicted by the semiclassical model are in very good agreement with the observed values. The implications of the model for optically-induced electron transfer in mixed-valence systems are noted. [Pg.109]

MBD3 Contains MBD domain and a C-terminal stretch of 12 glutamic acid residues mammalian protein does not bind methylated DNA in vivo or in vitro A component of the Mi2/NuRD and SMRT/HDAC5-7 deacetylase complexes Expressed in somatic tissues and in ES cells... [Pg.320]

Differentiation of this expression in order to find the time corresponding to the maximum rate of production yields a very complex expression. Instead, we find the minimum value of (l/. p) by differentiating the reciprocal of eqn. (27) and this shows that... [Pg.53]

Hollow cylindrical catalyst pellets are sometimes employed in commercial chemical reactors in order to avoid excessive pressure drops across a packed bed of catalyst. A more complex expression for the effectiveness factor is obtained for such geometry. This case was first discussed by Gunn [4]. Figure 2 illustrates the effectiveness factor curves obtained for the slab, sphere and cylinder. [Pg.157]

It is evident that for multiple reactions with variable density, we rapidly arrive at rather complex expressions that require considerable manipulation even to formulate the expressions, which can be used to calculate numerical values of the reactor volume required for a given conversion and selectivity to a desired product. [Pg.180]

Of the two kinds of numerical prefix (see Table 4.2), the simple di-, tri-, tetra-, etc. are generally recommended. The prefixes bis-, tris-, tetrakis-, etc. are to be used only with more complex expressions and to avoid ambiguity. They normally require parentheses around the name they qualify. The nesting order of enclosing marks is as cited on p. 13. There is normally no elision in instances such as tetraammine and the two adjacent letters a are pronounced separately. [Pg.56]

Selection op Most Important Formation Constants for Complexes, Expressed as pk Values (= —log K)... [Pg.33]


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See also in sourсe #XX -- [ Pg.104 , Pg.108 ]




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