Über einen zusammenhang zwischen gewissen linearen differential- und differenzengleichungen

Ohne Zusammenfassung     

Über α,ω-übergangsmetallsubstituierte Oligosilane

Summary Methyloligosilanes withn=3, 4, 5 and 6 with dicarbonyl-cyclopentadienyl-iron- and tricarbonyl-triphenylphosphane-cobalt-groups in terminal positions were synthesized for the first time and characterized by NMR, IR, and MS. The NMR spectra were discussed in detail.

Herrn Prof. Dr. h.c. Ulrich Wannagat zum 70. Geburtstag gewidmet.     

Use of 13C-NMR in the study of reactions on crosslinked resins

Crosslinked poly(3,4-pyrrolidinediylethylene)s with functional side chains that contain acid and ester groups were synthesized by a number of different methods and the structures of the various resins were compared by ¹³C-NMR studies. The advantages and problems of this technique for structural determination of crosslinked polymers are compared with those methods normally used; for example, infrared (IR) and elemental analysis. Preliminary selective metal chelating abilities of the resins were determined.     

Physicochemical characterization of the endotoxins from Coxiella burnetii strain Priscilla in relation to their bioactivities

Background  

Coxiella burnetiiis the etiological agent of Q fever found worldwide. The microorganism has like other Gram-negative bacteria a lipopolysaccharide (LPS, endotoxin) in its outer membrane, which is important for the pathogenicity of the bacteria. In order to understand the biological activity of LPS, a detailed physico-chemical analysis of LPS is of utmost importace.     

Experimental detection of multipartite entanglement using witness operators

We present the experimental detection of genuine multipartite entanglement using entanglement witness operators. To this aim, we introduce a canonical way of constructing and decomposing witness operators so that they can be directly implemented with present technology. We apply this method to three- and four-qubit entangled states of polarized photons, giving experimental evidence that the considered states contain true multipartite entanglement.     

A simple, quick and reliable method for TEM cross-section preparation of ceramic oxide films on thin metal substrates

We present a preparation method of cross-sectional thin foils for transmission electron microscopy (TEM). Samples are 0.1-1 m thick ceramic oxide films (CeO2, CeO2-YBa2Cu3O7 and CeO2-ZrO2/YO2-YBa2Cu3O7) epitaxially grown on 30-100 m highly textured nickel substrates. This method includes gluing the sample between a copper oxide dummy and a silicon dummy, followed by mechanical polishing and conventional ion milling. TEM cross-sectional samples obtained with this selection of dummies are electron-transparent up to a few tens of m parallel to the film surface. Several layer structures were analyzed by TEM and the results are shown. The preparation technique described here can be applied to any type of oxide film deposited on thin metal substrates.