Chromates, structural variation

Ikemura T. and Aota S. (1988). Alternative chromatic structure at CpG islands and quinacrine-brightness of human chromosomes. Global variation in G-tC content along vertebrate genome DNA. Possible correlation with chromosome band structures. J. Mol. Biol. 60 909-920. 

In the DARC/PELCO method (1), the structural variable makes use of graph theory. It is based on simultaneous representation of ail structures (15) whose structural modifications are to be correlated with variations in property and of the population containing these structures. The environment concept is used to describe each structure as an ordered chromatic graph. The principle of syn chronous generation of a structure and of the series which contains it, called hyperstructure is used to describe the population to be studied. This concept and this principle, when applied to an isofocal population, define a multidimensional variable characterizing the chemical structure. 

Ferraris and colleagues studied laminate films of PEDOTT spin coated on electropolymerized N-methylpolypyrrole, polyaniline spin coated on PEDOT PSS, and polyaniline deposited on electropolymerized N-methylpolypyr-role. The films were analyzed using CIE (x, i/)-chromaticity coordinates. The observed colors in their fully doped and reduced states were found to be linearly dependent on the color coordinates of the two individual polymers of the laminate, which allows for adjusting the observed color by variation of layer thickness of an electrochromic device in a viable and predictable way. Inganas ° studied a laminate structure made from polypyrrole electro-chemically deposited on top of a PEDOTPSS layer formed by spin coating. In contrast to Ferraris et al. he found that the spectra of the laminate electrode matches well with spectra of pure polypyrrole. 

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