A novel approach for the separation of neutral analytes by means of electrochemically assisted injection coupled to capillary electrophoresis-mass spectrometry

A novel concept for capillary electrophoresis-mass spectrometry (CE-MS) studies of neutral analytes is presented. The experimental approach is based on the implementation of electrochemically assisted injection (EAI) which enables the generation of charged species from neutral analytes. In this way electrophoretic separations can be performed without the use of surfactants leading to an excellent compatibility with ESI-MS. Various ferrocene species have been used as model compounds to demonstrate the potential of the EAI-CE-MS technique.     

Decorrelation of networked communication flow via load-dependent routing weights

Clever assignments of link weights are able to change communication routes in such a way that loads are distributed almost evenly across a network. This is achieved by weight assignments based on the link load. As demonstrated for scale-free as well as synthetic Internet networks, they decorrelate the loads of the nodes and links from the network structure and increase the transport capacity of the network. For various Internet scans the increase of transport capacity amounts to a factor of around five when compared to shortest-path routing.     

Domain structure investigations in triglycine sulphate single crystals

The domain structure of pure and irradiated TGS crystals was investigated by electron microscope decoration technique. Changes in the decoration pictures due to irradiation are shown and the way in which small lenticular domains disappear in the spontaneous ageing process is presented. Moreover, the thickness of the domain wall was assessed to be for good TGS crystals, grown in the paraelectric phase, of about 120 Å.     

Über die Bildung algebraischer Zahlkörper mit auflösbarer Galoisscher Gruppe

Ohne Zusammenfassung     

Thermoelastische und elastische Eigenschaften des tetragonalen Quecksilberdijodids

All elastic constants c_ij and thermoelastic constants T_ij = d log c_ij/dT (T temperature) of tetragonal HgI₂ have been measured by ultrasonic methods on single crystals which had been grown from the vapour phase by the method of dynamical gradient reversal. HgI₂ exhibits strong anisotropic elastic properties which are qualitatively explained by structural details. The temperature dependence of the elastic constants is smaller than expected. Only the very small shear constant c₆₆ is strongly decreasing with increasing temperature. This behaviour might be seen in connection with the known phase transition at about 126°C.