19 Result(s)
within
T. Meisel
Physical Chemistry
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Article
Book review
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Article
Book review
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Article
Book review
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Article
Letter to the editor
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Article
The thermal stabilities of alkali metal alkanoates. Part IV
The thermal stabilities of long-chain lithium and potassiumn-alkanoates from tridecanoate to eicosanoate have been investigated up to 873 K with a MOM derivatograph. The results obtained, together with available ...
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Article
Calorimetric test of purity II
Dynamic and stepwise purity test techniques were compared, and it was established that in dynamic measurement the sample in many cases can not be considered to be in a state of equilibrium from the thermodynam...
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Calorimetric test of purity I
Relationships of various levels for the thermodynamical description of two-component eutectic systems have been investigated. It has been established that the van't Hoff relationship describes the melting curve d
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Article
The thermal stabilities of alkali metal alkanoates part III
Simultaneous DTA, TG and DTG analysis has been performed on potassiumn-alkanoates from pentanoate to dodecanoate in the range between room temperature and 873 K. Information has been obtained on the thermal decom...
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On the thermal stability of alkali metal alkanoates II
Lithiumn-alkanoats from pentanoate (LiC5) to dodecanoate (LiC12) have been investigated with regard to their thermal stabilities. None of these salts are stable in the molten state when oxygen is present, but in ...
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Article
The thermal stabilities of alkalimetal alkanoates Part I
Thermal analysis of Li, Na and K isobutyrates, Li and Na isovalerates, and Li and Na isocaproates has been performed between room temperature and 873 K under both inert and oxygen atmospheres. Information has ...
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Preparation and investigations of polyimides III
Polyamide acid powders of pyromellitic dianhydride and 4,4′-diaminodiphenyl ether base were prepared in tetrahydrofuran, in the heterogeneous phase. The imidization of these powders was investigated by thermog...
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Modelling of quantitative DTA equipment I. Electric analog approach
For an electric model, relationships have been established as a function of the DTA baseline shift, the intensity of the signal, the slope of the leading edge, the heating rate, the thermal resistance of the h...
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Article
Thermal behaviour of thallium(I) fatty acid salts, II
The electrical conductivity (EC) changes of thallium(I) salts of fatty acids, which possess liquid crystalline phases, were investigated as a function of temperature. It was found that sharp EC jumps are assoc...
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Thermal behaviour or thallium(I) fatty acid salts, I
We have studied the thermal behaviours of the fatty acid (C1-C9, C12, C14, C16 and C18) thallium(I) salts.
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Investigation of the thermal behaviour of fatty acid sodium salts
The thermal and thermo-electrical behaviour and properties, as well as the type structure and appearance of the liquid crystalline phases of the sodium salts of saturated, non-branching fatty acids were invest...
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Article
Thermal decomposition of some heavy and transition metal benzenesulphonates
The thermal behaviours of Mn(II), Fe(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Ag(I), Cd(II), Pb(II), and VO(II) benzenesulphonates were studied by simultaneous thermoanalytical methods (DTA, TG, DTG, EGA)...
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Article
The thermal decomposition of alkali metal formates
The thermal decompositions of lithium, sodium, potassium, rubidium and caesium formates were investigated by a complex dynamic thermoanalytical method. The ratio of the products in reactions resulting in alkal...
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Thermal properties of tetrahydroperparine derivatives
The thermal behaviour of tetrahydroperparine (THP) and its derivatives with various acids has been investigated. The acid is liberated from the formate derivative basically in two steps, while the other alipha...
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Article
On the thermal analysis of aliphatic carboxylic acids and their salts
The thermal behaviour of oxalic, malonic, succinic, glutaric, adipic, pimelic, suberic, azelaic and sebacic acid, and of their mono- and disodium salts and calcium salts has been studied by derivatography. Som...
