Abstract: The invention relates to an imaging method. Layer or volume areas are selected by radiating high-frequency pulses and applying at least one magnetic potential field. Nuclear magnetic resonances are excited and are detected as measuring signals in said areas. According to the invention, the method is carried out in such a way that different layer or volume areas are successively selected and the corresponding measuring signals are detected by means of the magnetic potential field and that layer or volume images of the individual layer or volume areas are produced after the measuring signals for the different layer or volume areas have been detected.

Abstract: The invention relates to L-lysine-producing strains of corynebacteria with enhanced lysE gene (lysine export carrier gene), in which strains additional genes chosen from the group comprising the dapA gene (dihydrodipicolinate synthase gene), the lysC gene (aspartate kinase gene), the dapB gene (dihydrodipicolinate reductase gene) and the pyc gene, but especially the dapA gene and the lysC gene (aspartate kinase gene), are enhanced and, in particular, over-expressed, and to a process for the preparation of L-lysine.

Abstract: The invention pertains to a process for the microbial production of amino acids. The process involves boosting the export carrier activity and/or export gene expression of a microorganism which produces the desired amino acid. It was found that a single specific gene is responsible for the export of a given amino acid, and on that basis, a process for the microbial production of amino acids, involving the controlled boosting of the export gene expression and/or export carrier activity of a microorganism was developed, which produces the amino acid. The boosted expression or activity of the export carrier resulting from this process increases the secretion rate and thus increases transport of the desired amino acid.

Abstract: The invention relates to a method for deposition of a catalyst, in particular a method for coating a membrane electrode unit (MEA) for a fuel cell. Said method requires no external electrical field as usual for conventional galvanic techniques. The support for the catalytic layer is first capacitively charged (pseudocapacitance). When brought into contact with an electrolyte solution, comprising the catalyst in the form of dissolved metal salt ions, an in-situ reduction (deposition) of the metal salt ions to give metallic catalyst occurs at the site of contact.

Abstract: The invention relates to a catalyst element for a recombinator for eliminating hydrogen from accident atmospheres, in which the technical problem of continuously efficiently converting both small and large amounts of hydrogen with the atmospheric air-oxygen present in the safety containers within a broad concentration range, and routing away the reaction heat arising in the process to such an extent that the respective ignition temperature is not reached in the present mixture is resolved by having the catalyst element exhibit a flat basic body (2), which is arranged within the area of flow through the recombinator, wherein the surface of the basic body (2) over which the accident atmosphere flows has a varying coverage density with catalyst material (3).

Abstract: This invention relates to isolated polynucleotides containing at least one of the polynucleotide sequences selected from the group a) polynucleotide which is at least 70% identical to a polynucleotide which codes for a polypeptide containing at least one amino acid sequence of SEQ ID no. 3 or 5, b) polynucleotide which codes for a polypeptide which contains an amino acid sequence which is at least 70% identical to the amino acid sequence of SEQ ID no. 3 or 5, c) polynucleotide which is complementary to the polynucleotides of a), b) or c), and d) polynucleotide containing at least 15 successive bases of the polynucleotide sequences of a), b) or c). wherein the polypeptides exhibit the biological activity of the enzymes for which the brnE or bernF (sic)gene codes and a process for the fermentative production of branched-chain L-amino acids with amplification of the stated genes.

Abstract: A ceramic material with a sintering temperature below 1000° C. and a Perovskite Structure with the general stoichiometric composition A′1-x-yA″xB′1-a-bB″aB′″bO3 whereby A′=Y, La, Pr, Nd; A″=Mg, Ca, Sr, Ba; B′=Mn, Ti, V, Cr, Ni, Zn, Pb, Sb, W, Zr; B″=Co; B′″=Cu, Bl; O<x<=0.4; 0<=y<=0.1; 0.09<a<=0.6 and; 0.09<=b<=0.6.

Abstract: The invention relates to a methanol fuel cell comprising a membrane which conducts metallic cations, in which the metallic cations induce the transport of the charge inside the membrane and are advantageously guided in a circuit in the form of a base from the cathode chamber to the anode chamber. The inventive methanol fuel cell prevents the methanol drag associated with proton-conductive membranes, thus producing higher power outputs on a regular basis. A separate transport of the water produced by the reaction is not necessary.

Abstract: The invention relates to a material, in particular for a thermal insulation layer, with increased thermal stability, a low heat conductivity and a large thermal coefficient of expansion. According to the invention, said material comprises lanthanides, in particular the elements La, Ce, Nd, Yb, Lu, Er or Tm, which preferably occur as a mixture in a Perovskite structure. Said thermal insulation layer is particularly suitable for replacing thermal insulation layers comprising yttrium stabilized zirconium oxides (YSZ) as the thermal stability thereof is given as well over 1200° C.

Abstract: An electrode, in the form of a spike, for insertion into a sample, has a large-area jacket adapted for applying an excitation current to the sample and a small-area tip electrically decoupled from the jacket, at which a potential measurement is made.

Abstract: Disclosed is a method for producing a magnetic tunnel contact. A metal layer is disposed on a first ferromagnetic layer (1) and is oxidised for producing an insulation layer (3). A second ferromagnetic layer (2) is produced on the insulation layer (3), whereby oxidation of the metal layer is supported by UV-light.

Abstract: A method and apparatus for the rapid tomographic measurement of conductivity distribution in a sample in which current excitations or voltage excitation is applied to the sample via electrodes or the like and potential differences or magnetic field strengths association with those excitation fields are measured and analyzed, e.g. by a Fourier analysis.

Abstract: The invention relates to a pulse train, to a nuclear magnetic resonance scanner, which comprises means for generating this pulse train, and to an imaging method in which the pulse train according to the invention is used. The pulse train according to the invention comprises an &agr; high-frequency pulse, a preceding 180° pulse or a preceding 180° and a 90° pulse that precedes the 180° pulse, as well as a slice selection and a k-space line coding as well as an acquisition module, which is subsequent thereto for purposes of generating data. This invention is characterized in that the acquisition module for generating data results from at least two slices. By means of the pulse train and imaging method according to the invention, 20 slices of an image can be acquired at 16 different points in time for a matrix size measuring 256×256 during a measuring time of 8 minutes and 28 seconds. As a result, T1 relaxation times can be used for the first time for imaging methods in medical diagnosis.

Abstract: The present invention relates to a process for examining an object, whereby properties of the object are detected at different times within a spatial frequency space formed by spatial frequencies. The process is carried out in such a way that consecutive images are recorded in overlapping areas of the spatial frequency space and, additionally, in areas of the spatial frequency space that differ from each other.

Abstract: The invention relates to L-lysine-producing strains of corynebacteria with enhanced lysE gene (lysine export carrier gene), in which strains additional genes chosen from the group comprising the dapA gene (dihydrodipicolinate synthase gene), the lysC gene (aspartate kinase gene), the dapB gene (dihydrodipicolinate reductase gene) and the pyc gene, but especially the dapA gene and the lysC gene (aspartate kinase gene), are enhanced and, in particular, over-expressed, and to a process for the preparation of L-lysine.

Abstract: A delivery device for a single- or multiphase fluid having a tubular body for axially guiding the fluid, including a motor stator arranged outside the tubular body and a delivery element arranged within the tubular body, comprising a motor rotor. A rotor gap is formed between the delivery element and the hollow body for allowing the fluid to pass through. Mounting arrangements are fixedly disposed in axial direction on each side of the delivery element within the tubular body. Hub gaps are formed between the delivery element and the mounting arrangement. First permanent magnet bearing elements are disposed in the mounting arrangement and second permanent magnet bearing elements are disposed in the delivery element. The first and the second permanent magnet bearing elements functionally work together and are magnetized in axial direction and have opposite polarity. Position sensors associated with each of the first permanent magnet bearing elements and a stabilizer is disposed around the hollow body.

Abstract: The invention relates to a device with a fuel cell or a stack of fuel cells, wherein one electrode of a fuel cell is separated from an adjoining channel or chamber through which an operating substance is supplied by means of a perforated plate. The size and/or the density of the holes increases towards the edge starting from a median line and the median line extends in parallel to the direction of flow of the operating substance. The inventive device more reliably avoids thermal gradients in the interior of the fuel cell or of a stack of fuel cells. In order to prevent the occurrence of temperature gradients, the device is cooled by evaporating a coolant in an external cooling system. The heat is mainly transferred by thermal radiation.

Abstract: A device is made available for producing monocrystals, for example large-diameter gallium arsenide monocrystals, that has a cylindrical heating appliance with a floor heater (2) and a cover heater (3). The heating surfaces of the floor and the cover heater are considerably larger than the cross-sectional area of the monocrystal to be produced. In addition, an insulator (6) is planned for the reaction space that is designed to prevent a radial heat flow and the guarantee a strictly axial heat flow over the complete height of the reaction space between the cover heater (3) and the floor heater (2).

Abstract: The invention relates to an imaging method for examining substances which contain atoms with an indirect nuclear spin-nuclear spin interaction. At least one excitation impulse produces a precession of at least several nuclear spins with an additional phase angle &Dgr;&phgr;=−&ggr;r&Dgr;Bz&tgr; in relation to an already existing precession in an outer magnetic field so that a transversal magnetization spreads out perpendicularly in relation to the outer magnetic field whereby effecting a relaxation of the transversal magnetization with relaxation times T2. The inventive method is characterized in that at least one rephasing pulse, which rephases the transversal magnetiztion, is applied after the excitation pulse and after a recording of at least one highly resolved image, and in that additional images are subsequently recorded with a lower resolution.

Abstract: The invention concerns a process for applying catalytically active material to a polymer diaphragm for low-temperature fuel cells. In accordance with the invention a non-polar solvent, catalytically active material and a polymer solution are processed to form a paste. The paste is applied to the diaphragm in layer form, in particular by screen printing. Then the paste is dried and pressed to the diaphragm with the application of heat. Swelling of the diaphragm is avoided by virtue of the presence of non-polar solvents. It is therefore possible to produce the desired product with a few processing steps. Material losses are minimized by the provision of the screen printing procedure. Overall therefore the process is simple and inexpensive.