Abstract: A circuit arrangement for bridging high voltages using a switching signal as a dynamic voltage level shifter includes switching signal sequences that can be processed or provided at different voltage levels. Thus, any technology for integrated high-voltage circuit involving any isolation method can be used to produce the circuit arrangements. The circuit arrangements make available signal levels with conventional voltage levels of between 3 V and 15 V at another voltage level, using a potential differential of a few volts up to several hundred volts, depending on the technology and application used. The potential differential between the input voltage level, or voltage transmitter and the output voltage level, or voltage receiver, can be either positive or negative, or can vary in intensity.

Abstract: Indolocarbazoles are furanosylated (e.g., 7) with acetals (e.g., 8) or their open chain congeners (e.g., 9) under conditions known to promote acetal exchange or formation, such as protic or Lewis acids. Furanosylated indolocarbazoles (e.g., 10) are also prepared via ring contraction of pyranosylated indolocarbazoles (e.g., 11) under conditions know to effect oxidation and benzylic acid type rearrangements, and pyranosylated indolocarbazoles (e.g., 11) are prepared via ring expansion of the furanosylated congeners (e.g.

Abstract: A process for the production of polyamides is disclosed. In a first reaction step, suitable monomers such as caprolactam or an aliphatic aminocarboxylic acid are reacted with polyfunctional amines, which contain at least one secondary amino group, and/or with salts containing such amines and dicarboxylic acids. The reaction product is in a further process step undergoes solid phase post-condensation.

Abstract: The present invention relates to a process for the preparation of high-viscosity polyesters with a reduced content of acid end groups, wherein a masterbatch of low-viscosity polyesters and oxazolines is prepared, this is then mixed with a higher-viscosity polyester and this mixture (dry blend) is further processed.

Abstract: 2-aryl-ethane-sulphonic acids of the formulaAr.sup.1 --CH.sub.2 --CH.sub.2 --SO.sub.3 H (I),in whichAr.sup.1 denotes a carbocyclic or heterocyclic aromatic radical which can be bound to an anellated benzene nucleus,can be obtained by reaction of the underlying vinyl aromatic compound with sulphurous acid, if the reaction is carried out in the presence of an amine of the formulaN(R.sup.1,R.sup.2,R.sup.3 (III),in whichR.sup.1, R.sup.2 and R.sup.3 have the meaning mentioned in the description.

Abstract: An improved process for the preparation of gamma globulin suitable for intravenous administration comprises dissolving gamma globulin precipitated from blood or blood products in a solution, separating non-dissolved precipitate from the solution, adding polyethylene glycol to the separated solution, separating precipitate from the polyethylene glycol solution, increasing the polyethylene glycol concentration in the solution, separating precipitated purified gamma globulin from the higher concentrated polyethylene glycol solution, dissolving the purified gamma globulin in a solution suitable for intravenous administration, which process is improved by dissolving the gamma globulin precipitated from blood in a solution having a neutral pH, adding polyethylene glycol in the first step to a concentration of 4.0-5.

Abstract: A contact arrangement for vacuum switches with coaxially arranged cup contacts, the slotted contact carrier of which is provided with a contact ring, in which, the exposed surface of the contact ring is provided with bevels extending radially inward and outward and the contact ring and/or the contact carrier contain an annular zone with an electric conductivity which is substantially reduced in comparison with the material of the contact carrier.

Abstract: A centrifuge for biological specimens is constructed to include one or two additional concentric rotors being independently drivable and provided with means for transfer of objects to and/or from the main centrifuge. The rotating specimen is under observation from a stationary observation point.

Abstract: In a process for preparing Moenomycin by the aerobic fermentation of Moenomycin-forming Streptomyces in the presence of fats, the improvement wherein a surfactant of the formulaRO--(CH.sub.2 CH.sub.2 O--).sub.n His present in the fermentation medium, R being saturated or monounsaturated hydrocarbon having 8 to 18 carbon atoms and, in each case, optionally being substituted by hydroxy, and n is an integer from 18 to 30.

Abstract: 2-Phenyliminopyrrolidines of the formula: ##EQU1## or salts thereof, WHEREINR.sub.1 is halogen,R.sub.2 is hydrogen, halogen, alkyl of 1 to 6 carbon atoms, difluoromethyl or trifluoromethyl,R.sub.3 is hydrogen or alkyl, preferably lower alkyl,n is an integer from 1 to 4, andA, b and D each represent hydrogen, alkyl of 1 to 6 carbon atoms, alkenyl of 2 to 6 carbon atoms, or A and B, or B and D are linked to each other to form a ring, provided that at least one of A, B and D is alkyl or alkenyl,Are useful as acaricides.