High structural aspects

Takemura K, Minomura S, Shimomura O, Fu]ii Y and Axe J D 1982 Structural aspects of solid iodine associated with metallization and molecular dissociation under high pressure Phys. Rev. B 26 998... 

Traditionally, the chemical stability of the electrode/electrolyte interface and its electronic properties have not been given as much consideration as structural aspects of solid electrolytes, in spite of the fact that the proper operation of a battery often depends more on the interface than on the solid electrolyte. Because of the high ionic conductivity in the electrolyte and the high electronic conductivity in the electrode, the voltage falls completely within a very narrow region at the electrolyte/electrode interface. 

We start by listing a few of the structural aspects of neutron stars that are affected by high-density microphysics and can be observed astronomically. We assume that the neutron star is in dynamical equilibrium. In this list, by mass we mean the gravitational mass, rather than the sum of the rest masses of the individual particles. 

The electrochemical behaviour of a high number of metalloporphyrins has been reviewed some years ago.90 We would like here to point out a few electrochemical-to-structural aspects of such derivatives. 

S. Klotz, J. M. Besson, G. Hamel, R. J. Nelmes, J. S. Loveday, W. G. Marshall, and R. M. Wilson, Crystal structure studies to 10 GPa with the Paiis-Edinburgji cell high pressure aspects in High-Pressure Science and Technology, S. C. Schmidt, J. W. Shaner, G. A. Samara, and M. Ross, eds. AIP Press, New York, 1993, pp. 1577-1580. 

In the sections that follow, we are going to describe a few representative examples of how histone variability (histone variants and their post-translational modifications) can affect nucleosome stability and folding. This data supports the notion that while some of this variability may be exclusively used to provide an informational code [121,123,165] it can also have important implications for structural aspects involved in the highly dynamic nature of the chromatin fiber. 

The analysis of X-ray contrast agents has not been described in too much detail in the hterature. Only scattered data for individual compounds can be found. In the following paragraphs, we will concentrate both on the determination of physicochemical characteristics, which allow for a classification of different contrast agents, e.g. into high and low-osmolar substances, and on the separation from by-products or biological material and on the determination of concentrations. Structural aspects of iodinated contrast agents have been described by Toennessen et al. [81]. 

In an effort, to study the effect of introduction of -C=C- on thermal stability of polynitroaromatics, Feng and Boren designed 3,3 -bis((2,2, 4,4, 6,6 -hexanitrostilbene) and azo-3,3 -bis (2,2, 4,4, 6,6 -hexanitrostilbene), synthesized and studied their structural aspects by infrared (IR), NMR, elemental analysis and mass spectrometry [64]. These explosives are expected to have high m.p. and thermal stability in view of their large molecular masses and better molecular symmetry. Further, DSC study of these explosives also proves that thermal stability of an explosive is associated with its m.p. Also decomposition rate is accelerated... 

In spite of the wealth of information available on the preparative and structural aspects of the lanthanide chlorides (1-3), experimental thermodynamic, and, in particular, high-temperature vaporization data are singularly lacking. The comprehensive estimates of the enthalpies of fusion, vaporization, heat capacities and other thermal functions for the lanthanide chlorides by Brewer et ah (4, 5) appear internally consistent, but the relatively few experimental measurements (6-/2) do not permit confirmation of the estimates due to the narrow temperature ranges of study. Additionally, the absence of accurate molecular data for the gaseous species has hampered third-law treatment of the limited experimental vapor pressure data available. The one reported study (12) of the vaporization of EuC12 effected by a boiling-point method lacks accuracy for these reasons. 

U. Benedict and W.B. Holzapfel, High-pressure studies - Structural aspects 245... 

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