Stepwise Stability Constants & Thermodynamic Functions of In (III) Complexes with Some Substituted Derivatives of Quinoline & Pyridine

327-32

Sensitization of Colour Reactions of Lanthanides & Chrome Azurol S with Some Cationic Detergents

189-19

Ultrasonic Nondestructive Evaluation of Composite Materials using Fractal Graphs

In nondestructive evaluation of composites, ultrasonic C-scan technique is perhaps the most versatile and widely practised. In recent years, automated C-scan has become possible. which incorporates advanced features as digitisation and storage of analog data, in real-time. However, C-scan images are still evaluated by visual inspection. In the present work, Fractal theory is proposed as a viable supplement to this human inspection. A simple fractal algorithm has been implemented for such an exercise

Potentiometric Studies of the Complexes of Pr(III) with Ethylenediaminetetraacetic Acid as Primary Ligand & Pyrogallol, Pyrocatechol, Protocatechuic Acid & Protocatechualdehyde as Secondary Ligands

421-42

Ternary Complexes of Y(lII) with Nitrilotriacetic Acid, EDTA or N-Hydroxyethylethylenediaminetriacetic Acid as Primary Ligands & Picolinic Acid or Pyrocatechol Violet as Secondary Ligands

192-19

Studies in Equilibria Involved in Complexation Reaction Between Zr (IV) & Some Organic Dyes

510-51

Potentiometric Studies on Some Ternary Complexes of Yttrium (III) with Nitrilotriacetic Acid, N-Hydroxyethylethylenediaminetriacetic Acid & Ethylenediaminetetraacetic Acid as Primary Ligands

636-63

Evaluation of weak intermolecular interactions in molecular crystals via experimental and theoretical charge densities

Analysis of charge density distributions in molecular crystals has received considerable attention in the last decade both from high-resolution X-ray diffraction studies and from high-level theoretical calculations. An overview of the progress made in deriving one-electron properties, intermolecular interactions in terms of the Atoms in Molecule (AIM) approach (R.F.W. Bader. Atoms in Molecules-A Quantum Theory, Clarendon, Oxford (1990), R.F.W. Bader. J. Phys. Chem., A102, 7314 (1998)) is given with special emphasis on improvements in charge density models and development of both experimental and theoretical techniques to interpret and analyse the nature of weak intermolecular interactions. The significance of the derived results from the charge density of coumarin and its derivatives have been analysed to obtain insights into the nature of intermolecular C-H…O, C-H…π, π…π, C-H…S, and S…S contacts. The appearance of a 'region of overlap' to segregate hydrogen bonds from van der Waals interactions based on the criteria proposed by Koch and Popelier (U. Koch, P.L.A. Popelier. J. Phys. Chem., 99, 9747 (1995), P.L.A. Popelier. Atoms in Molecules. An Introduction, pp. 150-153, Prentice Hall, UK (2000)) and the identification of differences in energy surfaces in concomitant polymorphs of 3-acetylcoumarin are described

Synthetic & Structural Studies on the Polymeric Complexes of Terephthaloyl-bis-(N-phenylhydroxamic Acid) (TPHA) & Sebacyl-bis(N-phenylhydroxamic Acid) (SPHA) with Co(II), Ni(II), Cu(II) & Zn(II)

222-22

Applicability of genetic algorithms to reconstruction of projected data from ultrasonic tomography

In this paper simulation studies of the ultrasound computerized tomography (CT) technique employing time of flight data is presented. An enhanced genetic algorithm based reconstruction technique is proposed that is capable of detecting multiple types of inclusions in the test specimen to be reconstructed. It is assumed that the physical properties of the inclusions are known a priori. The preliminary results of our algorithm for a simple configuration are found to be better than those reported with MART1. In addition to being able to identify inclusions of different materials, both the shape and location of the inclusions could be reconstructed using the proposed algorithm. The results are found to be consistent and satisfactory for a wide range of grid sizes and geometries of inclusion(s). Based on the regression analysis an empirical relation between the number of unknowns and the reconstruction time is found which enables one to predict the reconstruction time for higher resolutions