Synthesis,Structure, Spectral-Luminescent Properties,and Biological Activity of Chlorine-Substituted N-[2-(Phenyliminomethyl)phenyl]-4-methylbenzenesulfamide and Their Zinc(II) Complexes

New azomethine compounds of 2-(N-tosylamino)benzaldehyde or 5-chloro-2-(N-tosylamino)benzaldehyde and the corresponding chlorine-substituted anilines, zinc(II) complexes based on them have been synthesized. The structures of azomethines and their complexes were determined by elemental analysis, IR, ¹H NMR, X-ray spectroscopy, and X-ray diffraction. It is found that all ZnL₂ complexes have a tetrahedral structure according to XAFS and X-ray diffraction data. The photoluminescent properties of azomethines and zinc complexes in methylene chloride solution and in solid form have been studied. It is shown that the photoluminescence quantum yields of solid samples of the complexes are an order of magnitude higher compared to the solutions and range from 11.34% to 48.3%. The thermal properties of Zn(II) complexes were determined by thermal gravimetric analysis (TGA) and differential scanning calorimetry. The TGA curves of all the compounds suggest their high thermal stability up to temperatures higher than 290 °C. The electrochemical properties of all complexes were investigated by the cyclic voltammetry method. The multilayered devices ITO/PEDOT:PSS/NPD/Zn complex/ TPBI/LiF/Al with wide electroluminescence (EL) color range spanning the range from bluish-green (494 nm) to green (533 nm) and the high values of brightness, current and power efficiency were fabricated. The biological activity of azomethines and zinc complexes has been studied. In the case of complexes, the protistocidal activity of the zinc complex with azomethine of 5-chloro-2-(N-tosylamino)benzaldehyde with 4-chloroaniline was two times higher than the activity of the reference drug toltrazuril.     

Double-supply-frequency pressure pulsation in annular linear induction pump: Part I: Measurement and numerical analysis

This paper describes an experimental and analytical study of double-supply-frequency pressure pulsation arising in an annular linear induction pump. In a large-scale induction pump, it is known that the supply frequency should be relatively low in order to satisfy a magnetohydrodynamic stability criterion. Under such a low supply frequency, however, double-supply-frequency pressure and flow rate pulsation generated in an induction pump may be of concern. The experimental data obtained in the present work shows that the amplitude of the pressure pulsation increases with decreasing supply frequency, number of poles and/or slip. The numerical result reveals that the pressure pulsation comes from a disturbance of the electromagnetic force near the stator ends.     

激光辐射下的固体双基推进剂的燃烧特性

燃速与辐射通量之间的关系可以由两支相交直线构成的线性方程进行描述,其中折点(交点)是外界辐射能作用下固体双基推进剂燃烧的一个重要特征。包括折点附近在内的燃烧特性可以采用Fourier方程进行分析。考虑到辐射在燃烧表面上形成的碳化层对辐射传递的阻碍作用,本文分析了1040,1041,N-5和N型推进剂的燃烧特性。导致两段函数和折点形成的主要原因是在辐射能到达凝聚相表面之前部分辐射能已经发生了损失。     

Millimeter wave band open resonators with additional restriction of resonant space

Electromagnetic characteristics of open resonators with a bounded region beside one of the mirrrs are presented. The unknown previously modes are studied and classified. It is the quasi-fundamental modes, associated modes and echelette-echelette oscillations. This result may be used for the applicaiton in the elaboration of oscillation systems of mm-wave devices.     

The theory of search from a statistical viewpoint

Summary The statistical approach to search is a subject which interfaces with many other fields. This work continues a series of papers which studies these relationship with special emphasis on geometric problems in non-sequential search. A targetT is sought using a series of testsX ₁,X ₂.... From each test there is an observationY _i=f(X _i , θ), where θ is an unknown parameter andT=T(θ). Spacing theories and the theories of Voronoi regions can be used to represent the solutions to Bayes and entropy-based formulations to the search problem by partitioning the search field intoconsistent regions where the target is known to lie, given the observations. Other examples are from integration where the target is a function. Covering theory is studied and the last section gives a brief comparison with a sequential approach. Read before the Spanish Statistical Society at a meeting organized by the Universidad de Almería on Friday, April 29, 1994     

Concentration dependence of thermodynamic interaction parameters in a polymer-polymer-solvent system

Summary The concentration dependence of Thermodynamic Interaction Parameters is reported for the system Polystyrene (PS, M_{W 3}=4.4 · 10⁵) — Polybutylmethacrylate (PBMA, M_{W 2}=2.7 · 10⁵) — CCl₄.