For developing and testing of power electronic converters and circuits, voltages and currents have to be measured to verify the proper mode of operation. In cascaded converters or multi-level topologies, the voltages to be measured contain common mode components up to several kV with transients up to several tens of kV/μs. Conventional isolated voltage measurement systems do either not meet the...

Analyses of the X-ray data of the five young shell-type supernova remnants Cas A, Kepler, Tycho, SN 1006, and RCW 86 suggest that some of the X-ray emission of these sources is non-thermal. This non-thermal emission is qualitatively consistent with models of the broad-band (radio-to-X-ray) synchrotron spectra of remnants and does not seem to be consistent with other non-thermal X-ray emission p...

1. A dextran synthesized by Leuconoatoc mesenteroides (strainNRRL B-512) has been partly hydrolysed with acid and the products were fractionated on charcoal-Celite. 2. Glucose was the only monosaccharide product and the dito hexa-saccharide fractions each contained a single component. 3. The oligosaccharides have been characterized as the lower members of the isomaltodextrin series and new crys...