Max Dehn zum Gedächtnis

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Solubility of gases in liquids. 12 Solubility of He,Ne, Ar,Kr, O2, N2, CO,CO2, CH4, CF4, and SF6 in octamethylcyclotetrasiloxane at 292 to 313 K

The solubility of 11 gases in octamethylcyclotetrasiloxane (OMCTS) has been determined at atmospheric pressure in the range 292 to 313 K. From the results partial molar Gibbs energy, enthalpy, and entropy of solution for 1 atm partial pressure of gas and 298.15 K have been dervied. Comparison with results obtained through application of scaled particle theory showed significant deviations of calculated entropies of solution towards more positive values, which increased with increasing size of the solutes.     

Anion Selectivities of Triorganyltin Acetates and Halides in Solvent Polymeric Membranes

A series of triorganyltin compounds of the type R₃SnY and RR²SnY has been studied in view of their anion selectivities exhibited in solvent polymeric membranes. A large variety of selectivity patterns has been observed first by varying the concentration of a given ionophore in the membrane phase, and second by using ionophores which differ in the organic substituents R on the Sn centre. With more space consuming substituents R, the observed selectivity patterns become more and more similar to that of a blank membrane, suggesting steric hindrance for the pentacoordination of the corresponding ionophores by sample anions.     

Generalized solution principles and out-ranking relations in multi-criteria decision-making

In this paper the abstract notion of a solution principle for multi-criteria decision-making problems is introduced as a set-valued mapping which associates to each decision problem (several) sets of potential solutions. Some modeling conditions are imposed on solution principles which relate them with binary (preference or outranking) relations; this relationship is studied, particularly, the concepts of kernel, quasi-kernel, subsolution and supercore are discussed in terms of solution principles.     

Eine Kennzeichnung der desarguesschen projektiven Ebenen durch mehrwertige Ordnungsfunktionen

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