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Fundamental grouping

The theoretical methods can be divided into two fundamental groups. The so-called continuum models are characterized by assuming that the medium is a structureless and polarizable dielectricum described only by macroscopic physical constants. On the other hand there are the so-called discrete models. The main advantage of... [Pg.187]

Electrochemical Adsorption at Catalytic Electrodes. A classification of adsorption processes at catalytic electrodes, such as platinum or rhodium, first proposed by Horanyi (24) and further developed by Wieckowski (21,25,26), categorizes adsorption processes into three fundamental groups ... [Pg.248]

Division The fundamental groups into which the plant or animal kingdom are divided, each representing a different stage or progressive movement. [Pg.47]

In Mi and M2, the closed path is homotopic to a null path. In Mi, this cycle is the boundary of a face, while in M2, the closed path is the boundary of all faces put together. More generally, a plane graph and a finite plane graph minus a face are simply connected. But the closed path in M3 is not homotopic to a null path. Actually, this closed path is a generator of the fundamental group Jti(Mf) — Z. [Pg.7]

All anihocyanidins have tile 2 phcnylhen/opyrylium or flavylitim cation structure, a resonance hybrid of oxonium forms and carbcnium forms. There are three fundamental groups of anihocyanidins to which all the other anihocyanidins could be referred. In the following structure R = R = H designates pelargonidin R = OH. R = H is cyanidin and R = R = OH is dclphinidin. [Pg.530]

On the U(l) level, the transverse components of eM are physical but the longitudinal component corresponding to M = 0 is unphysical. This asserts two states of transverse polarization in the vacuum left and right circular. However, this assertion amounts to Cq = e[i = 0, meaning the incorrect disappearance of some vector spherical harmonics that are nonzero from fundamental group theory because some irreducible representations are incorrectly set to zero. [Pg.130]

The urethane linkage is the fundamental group in polyurethane chemistry. The initial step in the preparation of a cast prepolymer is to react a suitable linear diol with a difunctional isocyanate, as illustrated in Figure 2.2. [Pg.273]

There are two fundamental groups of approaches. The first involves performing PCA on an expanding window which we will refer to as EFA. There are several variants on this theme, but a popular one is indicated below. [Pg.376]

In most cases, the types of one-dimensional loops with homotopically different contractibility properties within LDG(K, am, Aa) are more numerous, and the fundamental group Ill(LDG(K, am, Aa)) has a large number of generators. [Pg.631]

A molecule is the smallest fundamental group of atoms of a chemical compoimd that can take part in a chemiccd reaction. The atoms of the molecule are organized in a 3D structure the molecular matrix M is a rectangular matrix Ax3 whose rows represent the molecule atoms and the columns the atom Cartesian coordinates x, y, z) with respect to any rectangular coordinate system with axes X, Y, Z. The cartesian coordinates of a molecule usually correspond to some optimized molecular geometry obtained by the methods of -> computational chemistry. The molecular geometry can also be obtained from crystallographic coordinates or from 2D-3D automatic converters. [Pg.310]


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See also in sourсe #XX -- [ Pg.270 ]




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