Anisotropy determination

In hardness anisotropy determination, maximum differences are observed in minerals of lower symmetry or fibrous and laminar structure. The degree of anisotropy is estimated through the coefficient of anisotropy... 

Comparison of results of crystal hardness anisotropy determination by Vickers and scratch methods... 

Kh—hardness anisotropy the ratio of hardness measured in different directions. Ahv—hardness anisotropy determined by Vickers method. 

TABLE 7.1 Optical Anisotropies for the Isotropic and Nematic Conformation of CBA-9 and CBA-10 Calculated Using the Group Anisotropies Determined in the Isotropic Solution ... 

Layer-thickness dependence of magnetic properties at room temperature. Figure 9a (Shan and Sellmyer 1990b) shows a detailed Fe layer-thickness dependence of hysteresis loops for 5 A DylX A Fe as the Fe layer thickness varies from 2.5 A to 40 A note especially that the interval is only 1.25 A asX ranges from 2.5 to 10 A. The layer-thickness dependences of magnetization and anisotropy determined from fig. 9a are summarized in fig. 10. 

Figure 1 shows the results of anisotropy determinations with the alr-fiiled lattices. Although the points show... 

In nitroxide free radicals characterized by a hyperfine tensor. A, and g-tensor, g, the interaction between the magnetic moment of an unpaired electron and the magnetic moment of nitrogen nucleus is highly anisotropic. The anisotropy determines the line shape of electron spin resonance (ESR) spectrum of completely immobilized nitrox-ides (Fig. 1), and can be completely averaged out for fast thermal Brownian rotational diffusion in low-viscous media. For the " N nucleus with 7=1 and no other interacting nuclei in the nitroxide, three equidistant lines of equal intensities and widths should be observed in ESR spectra in such media. In fact, even in media of... 

Ti values of the carboxylate groups of EDTA and its complexes with Mg, Ca +, Zn + and AF+ have been measured at different fields and the chemical shift anisotropy determined. NMR data have also been reported for [Ba Zn(CH2SiMe3)3 2], and [ (c-C5H9)7Si70i2 2Mg4Cl2(THF)2] 4THF,... 

DJ Rowchiffe, GE Hollox. Hardness anisotropy, determination mechanisms and brittle-to-ductile transition in carbides. J Mater Sci 6 1270, 1971. 

Rheology, or the study of deformation and flow, represents the linking stage between polymerization and application it is concerned with the manufacture of articles and their properties. Liquid crystallinity is a rheological phenomenon it is observed as a result of a flow process producing persistent anisotropy in the fluid, and that anisotropy determines the property spectrum of the product. Thus an appreciation of rheological phenomena is doubly important in the study of liquid crystal polymers. 

The theoretical model of the IR linear dichroism suggests a single-axis orientation of a molecular assembly with axial (cylindrical) synunetry. This means that the molecules are located with their longest axis in the direction, which induces the anisotropy, determined by the director n, and the side groups are randomly fixed or rotate along the length of this axis. Under these conditions, the dipole moments of transition caused by the normal vibrations form conical surfaces with director n (Figure 1.2) [2,3,6-8]. 

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