Isometric form

It has often been observed that the coloristic properties of an organic pigment are a function not only of the size of particles but also of their shape. This is due to the anisotropy of the optical properties in different crystallographic directions within the crystal forms of a pigment. In 1974 [5, 6], it was demonstrated that of the equally sized but differently shaped particles of beta copper phthalocyanine blue, the almost completely cubic, i.e., more or less isometric form produces greenish blue shades, while acicular forms are responsible for reddish blue hues. The optical behavior of ordered pigment particles in systems has been reported in the literature [7, 8]. 

Polyhedral crystals bounded by flat crystal feces usually take characteristic forms controlled by the symmetry elements of the crystal (point) group to which the crystal belongs and the form and size of the unit cell (see Appendix A.5). When a unit cell is of equal or nearly equal size along the three axes, crystals usually take an isometric form, such as a tetrahedron, cube, octahedron, or dodec-... 

Aminomethylbiphenyls or Met by I hi ph eny la-mines, CnH 1JN, exist in several isometric forms, such as Ha N-C6H4-C6H4-CH, ... 

Argentite is probably die most important primary silver mineral. However, it maintains its cubic (isometric) characteristic only above 179 C (354°F). Upon cooling, the inward structure inverts to a noil-isometric form, usually orthorhombic, yet retaining its original outward form. It is, therefore, a paramorph after argentite, known as acanthite. 

Glucose (or dextrose) is one of aldohexoses which has two isometric forms (Figure 4.1) D and L. The D form predominates in the nature. Glucose is the most common and most important hexose and is found in most sweet fruits and in blood sugar. 

When LSD is in the hands of drug intelligence much can be told about the drug, especially if it is improperly prepared. Each synthesis of LSD creates various isometric forms of the drug. 

Cyclophilin A is a simple example pentamer and decamer share the same isometric form lattice. Moreover, the mutual orientation of the pentamers in the decameric configuration is fixed through a linear scaling transformation leaving the form lattice invariant. The geometry of the entire biomacromolecular system and of its components is expressible in term of the single parameter tq, which is the shortest distance of the monomeric chain from the fivefold axis. 

Fig. 1 shows the effect of instantaneously doubling the entrainment velocity. In these plots clearance and pressure are plotted against position, with the clearance being plotted downwards for clarity. Curves are displayed in isometric form for a number of time steps. The change of velocity occurs at t = 0 and entrainment is on the left of the figure. 

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