Abstract: A process for distillative separation of part or all of an imine (III) from a mixture (II) comprising an amine (I) and said imine (III) comprises adding to the distillation mixture a compound (IV) which is inert toward said amine (I) under distillation conditions and whose boiling point is above the boiling point of said amine (I) under said distillation conditions to obtain, after the distillation, a mixture (VI) comprising essentially said compound (IV).

Abstract: A device for connecting two tubular pipe sections. A sealing device is arranged between the pipe sections. At their ends, the pipe sections in each case have a flange-type end piece. The pipe sections are held together by a spring device using a pre-tensioning force, the spring device having a mid-section extending at right angles to the longitudinal axis of the pipe sections. The spring device has a spring element, from whose transverse sides of the mid-section, which extend at right angles to the longitudinal axes of the pipe sections, spring limbs extend. Forming an at least approximate U-shape with the mid-section, the spring limbs extend at least partially over the periphery of the pipe sections, the spring limps each having a centrical cut-out that is adapted to the outside diameter of the pipe sections and in which a pipe section is accommodated in each case in the mounted state of the spring element.

Abstract: An actuator is operatively connected to a closing member via a tappet. The closing member is introduced in a valve chamber and forms, with a conically tapering valve seat as part of a servovalve, a seal resistant to high pressure. The cross section of the closing member is configured to be mushroom-shaped, a closing head being in the form of a part-sphere and having a central flattening, with the result that the tappet has an enlarged bearing surface. A stem of the closing member is surrounded by a valve spring. The closing member is preferably shaped out of a solid sphere.

Abstract: At least one monitor laser having an associated monitor diode. The monitor diode is connected to an electronic circuit that controls the monitor laser, while correspondingly driving the semiconductor lasers in parallel, in such a way that an electrical signal from the monitor diode constantly has a preset value. This value and a nominal signal corresponding to the nominal value of the optical power of the monitor laser are used to form a correction variable. If a current flowing through a semiconductor laser exceeds the current through the monitor laser, weighted by the correction variable, then the power of the semiconductor laser is reduced. In this manner, the transmitting device is of simple construction and at the same time avoids unacceptably high powers in the semiconductor lasers.

Abstract: Paramagnetic 3-,8-substituted deuteroporphyrin derivatives with various substituents in positions 13 and 17 of the porphyrin skeleton, are suitable as diagnostic agents for MR imaging of necrosis and infarction.

Abstract: A carrier strip for fastening elements and including a plurality of ring-shaped receiving members (1) for receiving the fastening elements (5), with the receiving members (1) having each a receiving opening (2) and being arranged one after another and connected with each other, and with each two adjacent receiving members (1) being offset relative to each other in a direction parallel to a longitudinal axis of the receiving opening (2).

Abstract: Compounds of the formula where R1, R2, R3, X and n are as defined in the description, are inhibitors of cysteine protease.

Abstract: A process for decolorizing polymers or copolymers which are obtained by cationic polymerization of tetrahydrofuran or of tetrahydrofuran and alkylene oxide, in the presence or absence of a telogen, comprises a) first, if desired, removing the low-boiling components by vacuum distillation or extraction and b) heating the remaining polymer or copolymer in the presence of at least one auxiliary selected from the group consisting of solid oxides and/or sheet silicates to from 20 to 150° C.

Abstract: A spacing profile for a spacing frame, which is to be fitted in the edge area of a double-glazing unit, forming an interspace, with a profile body of a material possessing low thermal conductivity. The spacing profile additionally comprises a desiccant cavity, and further a metal foil, which extends essentially over the entire width of the spacing profile. Only the metal foil together with a center piece of the connecting flanges forms the walls of the desiccant cavity.

Abstract: The invention concerns a process for the enzymatic preparation of protected di- and oligopeptides and the separation of the protective groups used. The process according to the invention enables peptides to be synthesized simply and economically and the protective group to be separated carefully. The process comprises three reaction steps: 1. Preparation of N-carbamoyl amino acid or N-carbamoyl amino acid derivatives; 2. Formation of the peptide bond between the carbamoyl-protected electrophile and nucelophile; and 3. Separation of the carbamoyl-protective group.

Abstract: The invention relates to the use of dispersions of magneto-ionic particles consisting essentially of superparamagnetic solid particles and at least one polyelectrolyte as dispersing substance in water for the preparation of an MRI contrast medium.

Abstract: The invention relates to a method for producing a Fresnel lens having a staged entrance surface, reflecting surfaces and an exit surface. The entrance surface is subdivided into outer concentric stages and a central part. The central part is aspherically curved on an entrance side and plane on an exit side by satisfying the eikonal condition. Every stage has a top side, underside and outer side, top sides and undersides being of plane design, and the outer sides having curvatures appropriate for satisfying the eikonal condition.

Abstract: The invention relates to novel sulphonylamino(thio)carbonyl compounds of the formula (I), in which A represents a single bond, oxygen, sulphur or the group N—R, in which R represents hydrogen, alkyl, alkenyl, alkinyl or cycloalkyl, Q represents oxygen or sulphur, R1 represents hydrogen or formyl or represents in each case optionally substituted alkyl, alkenyl, alkinyl, alkylcarbonyl, alkoxycarbonyl, alkylsulphonyl, cycloalkyl, cycloalkylcarbonyl or cycloalkylsulphonyl, R2 represents cyano or halogen or represents in each case optionally substituted alkyl, alkenyl, alkinyl, alkoxy, alkenyloxy or alkinyloxy, and R3 represents in each case optionally substituted heterocyclyl having 5 ring members of which at least one is oxygen, sulphur or nitrogen and from one to three further ring members can be nitrogen, and salts of compounds of the formula (I), the previously known compounds 4,5-dimethoxy-2-(2,5-dimethoxy-phenylsulphonylaminocarbonyl)-2,4-dihydro-3H-1,2,4-triazol-3-one, 4,5-di

Abstract: The invention relates to the use of racemic &agr;-lipoic acid or its enantiomers or pharmaceutically acceptable salts, amides, esters or thioesters thereof, in reduced or oxidized form, as active ingredient in the prevention or the acute or chronic treatment of migraine.

Abstract: An oligomerized polyorganosiloxane cocondensate which may be obtained, in part, by mixing an water-soluble amino-functional organosilane represented with at least one of the followoing: a fluoro-functional organosilane, an organosilane, and an organosilane. The cocondensate may be used, for example, in a method of treating surfaces.

Abstract: A switching device has a closing device and a traversing mechanism for insertion and retraction relative to an insertion frame, where the said devices can be operated only in the OFF state of the switching device. A blocking bar having a cam element that cooperates with a carrier of an OFF operator is guided by elongated holes behind an operator's console of the switching device. The carrier and the cam element work together in such a way that the OFF operator can be pulled inward when the blocking bar is operated, thus signaling to the user that the switching device is locked in the OFF state.

Abstract: In an industrial process for the heterogeneously catalyzed gas-phase oxidation of propane with molecular oxygen to give acrolein, the feed gas mixture having an initial undiluted molar ratio of the reactants propane:O2 of 7:3 is diluted with the reactant propane and, if desired, inert gases in such a way that the feed gas mixture comprises more than 70% by volume of propane and at least 5% by volume of O2.

Abstract: A ride leveler system in vehicles with an adjustable wheel suspension device between a vehicle wheel and the vehicle body, with a height sensor for measuring the actual height between a vehicle wheel, and with an electronic control device which specifies a target height and adjusts the wheel suspension device until the attainment of the target height. If there is a deviation between target and actual height, the electronic control device adjusts the wheel suspension device for a minimum period of time independent of the course of the actual height. Following expiration of the minimum control time, the adjustment is switched off at a point in time at which the measured actual height has attained the value of the target height for the first time.

Abstract: In a method and apparatus for controlling a driving engine/transmission unit having a continuously variable automatic transmission, the transmission output torque acting upon the driving wheels of a vehicle and the engine reaction torque retroacting upon the driving engine can be adjusted by way of a regulated transmission variable.

Abstract: In a method for the operation of a CT apparatus with which volume data for a volume region of an examination subject are registered, markings for identifying reconstruction regions are mixed into an x-ray shadowgram containing the volume region. The reconstruction of image data with respect to each reconstruction region ensues taking reconstruction parameters allocated to the respective reconstruction region into consideration.