A novel method to prepare membrane electrode assemblies (MEA) for direct methanol fuel cells (DMFC) by a layer-upon-layer fabrication onto a porous substrate is presented. The novel preparation technique is based on a ...

Polymeric materials are unmatched in the diversity of their properties, such as flexibility, stiffness or mechanical strength. One still open point is to tailor these material properties by controlling the molecular ...

In the first subpart, a method was developed to produce stable dispersions through polyaddition reaction. Two systems were prepared: System A, comprising of polyaddition between Polyol PPG 2000 and diisocyanates and System ...

Subject of this study were syntheses of diazoacetamides and diazoacetoacetamides which were catalyzed with different ruthenium(I,I)- and rhodium(II,II)-catalysts to form via a carbenoid C-H-insertion beta- and gamma-lactams. ...

Biological systems, especially the vertebrate brain, are very complex and usually possess a large number of nerve cells to produce flexible behavioural patterns. Therefore, model systems with a lower number of nerve cells ...

For an appropriate interaction with the environment, animals process sensory information with their nervous system. One well suited model systems for the investigation of neural processing is the stomatogastric nervous ...

We describe in this document new advances in miniemulsion polymerizations. We investigated different po-lymerizations in miniemulsion, namely radical, anionic,and condensation polymerizations, in order to obtain different ...

Unsaturated porous media form two-phase systems consisting of the liquid and its vapor. Molecular exchange between the two phases defines an effective diffusion coefficient which substantially deviates from the bulk value ...

As soon as the concept of entanglement was introduced a controversy about its correct interpretation has originated. Today, more than 70 years later, the problem has not been completely resolved. One of the most important ...

Diese Arbeit berichtet über die quantenmechanische Berechnung von [C4H7] + sowie α-, β- und γ-silyl substituierten Carbokationen. Neben Strukturoptimierungen mit Elektronenkorrelationsmethoden (CCSD und RI-MP2) ist die ...