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The applications of thermal methods in medical science have been summarized, with special regard to kidney stones. Complex thermal analysis can be used successfully for examination of human and animal urinary calculi, bones, odontoliths biological tissues (proteins, skin, callus, nail) etc.

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Abstract  

In present work we have investigated the commonly used base silicone elastomers namely cured poly-dimethyl-siloxanes and the change of the inner polarity of silicone elastomers containing various amounts of polar liquid ingredients and trifunctional silicone additives. It was shown that the polarity of the inside of the matrix is related to the diffusion properties of model substances and thermal properties of silicone elastomers. The ingredients used have changed the matrix framework, that was influenced by the type of trifunctional additive too. These properties show large dependence on the timing of the measurement. Measurements carried out after 48 hour of the production of the polymer showed reproducible properties, indicating that the final structure of the polymer has been formed.These results show that the ingredients influence the properties of the silicone matrices considerably, thus the characteristics of the drug release of pharmaceutical forms can be varied too.

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Summary  

Mixed ligand nickel(II) complexes of different compositions were prepared with water, sulfate ion and 1,2-ethanediol as ligands. The magnetic susceptibility data, the IR spectra and the thermoanalytical curves of the complexes were recorded. Oxygen atoms bound by one or two coordinate bonds to the metal ion, or by hydrogen-bonds in the crystal state were observed. All complexes are sensitive for moisture. The bis complex proved to be the more stable complex.

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Pyridine-type complexes of transition metal halides

IV. Preparation and thermal studies on some new complexes of nickel(II)-halides formed with 2-, 3-, and 4-methyl-pyridines

Journal of Thermal Analysis and Calorimetry
Authors: G. Liptay, G. Kenessey, and P. Bukovec

Abstract  

Formation of nitrogen ligated complexes of types NiL6X2, NiL4X2, NiL2X2 and NiL1X2 (whereL=pyridine, 2-, 3- and 4-methyl-pyridine andX=F, Cl, Br, I) have been studied by traditional preparative methods, i.e. from solutions and by solid-gas phase chemisorption. Quaternary mixed complexes were obtained by chemisorption from heated intermediates. The complexes thus formed were further analysed by simultaneous TG-DTG-DTA. Effects of the ligands on stoichiometry and thermal properties of the complexes are discussed.

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Abstract  

Mixed ligand complexes of different compositions were prepared with water, sulfate ion and 1,2-ethanediol as ligand. IR spectra and the thermoanalytical curves of the complexes were recorded. Oxygen atoms bound by one or two coordinate bonds to the metal ion, or by hydrogen-bonds in the crystal, were observed. As for the water molecule, 1,2-ethanediol molecules of crystal and monohydrate type were found, depending on the type of binding of the oxygen atoms.

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Studies on transition-metal picoline complexes

I. Preparation and thermoanalytical investigations

Journal of Thermal Analysis and Calorimetry
Authors: G. Liptay, A. Borbély-Kuszmann, and G. Nagy
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