Results are discussed in terms of similar conceptual processing networks Fer-1 supplier and we propose a tentative model of the semiotics
“This work deals with the design, synthesis, and characterization of a new solvatochromic dye. The intense solvatochromic behavior of this new synthesized non symmetric viologen was investigated using UV-Vis spectrophotometry. A further purpose was the study of the interactions between the solvent and solute molecules responsible for the solvatochromism. Several protic and aprotic solvents were used, and the resulting absorption maxima wavenumbers obtained via UV-Vis spectrophotometry, were correlated with the solvent polarity parameters, E(T)(30) (Dimroth-Reichardt solvent polarity parameter) and the Gutmann’s donor number (DN) using the biparametric model introduced by Krygowski and Fawcett. The analysis of the relative contribution of each parameter has clearly shown that the dominating interaction responsible for the solvatochromic behavior observed
is the proton donation by the solute molecules see more to the solvent molecules, the latter acting as a Lewis bases. This is an interaction which can be described by DN. Additionally, the good correlation with the Kamlet-Taft parameter beta is in good agreement.”
“In order to satisfy EIA X8R specification, a new type of BaTiO3-based ceramic with hierarchical structure in a formula scheme “a ferroelectric ABO(3) + another ferroelectric ABO(3)”, was designed. There were (Ba, Bi)TiO3 and Ba(Ti, Zr)O-3 phases with different Curie temperatures coexisting in the grains from inside to outside, prepared by wet chemical method under 100 degrees C. The
hierarchical structure of the ceramic grains was proved by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The dielectric constant of (Ba, Bi)TiO3-Ba(Ti, Zr)O-3 ceramic was similar to 6000, the Delta C/C-20 degrees C was -12.0%, 14.1%, and -8.3% at -55 degrees C, 130 degrees C, and 160 degrees C, respectively, and the dielectric loss is less than 0.1, which is obviously superior to (Ba, Bi)TiO3 and Ba(Ti, Zr)O-3. The results of this work showed that the formula scheme “a ferroelectric ABO(3) + another ferroelectric ABO(3)” for solid solutions is a promising find more approach to prepare high performance temperature-stable capacitor materials. (c) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.”
“A novel linear matrix inequality (LMI)-based criterion for the global asymptotic stability of two-dimensional (2-D) state-space digital filters described by the Roesser model employing various combinations of quantization and overflow nonlinearities is presented. The criterion is less restrictive than a previously reported criterion. (C) 2012 Elsevier B.V. All rights reserved.