Abstract: The disclosure relates to a method of producing an electrical connection to a sheet metal part, in particular to a sheet metal part having a non-conductive or poorly conductive protective layer, using a hollow fastener element which is mounted by means of the riveting or pierce riveting process to the sheet metal part, wherein a terminal lug is attached by means of a screw to the hollow fastener element, i.e. to the sheet metal part. The method is characterized in that the screw which is screwed into the hollow attachment element penetrates the sheet metal part and forms or reforms a thread in the sheet metal part. The disclosure furthermore relates to a component assembly which is produced in accordance with the said method.

Abstract: A clenching device for generating a clenching connection between a first workpiece and a second workpiece using a plunger which is movable from above into a recess of a die, wherein a peripheral wall of the recess has stationary wall sections which extend essentially parallel to a pressure direction. The peripheral wall of the recess has between the stationary wall sections movable wall sections which are arranged on levers. The levers are movable by pressures from above into a working position and are securable therein and from undercut areas and are movable by movement of the workpieces after the workpieces have been jointed in the upward direction into a release position in which the undercut areas are completely released.

Abstract: Pure and extremely stable crystalline (6R)-tetrahydrofolic acids, absolutely inert even when exposed to air and elevated temperature without stabilizers being added, are prepared by a crystallization process at a pH of ≧2.

Abstract: The disclosure relates to a method of producing an electrical connection to a sheet metal part, in particular to a sheet metal part having a non-conductive or poorly conductive protective layer, using a hollow fastener element which is mounted by means of the riveting or pierce riveting process to the sheet metal part, wherein a terminal lug is attached by means of a screw to the hollow fastener element, i.e. to the sheet metal part. The method is characterised in that the screw which is screwed into the hollow attachment element penetrates the sheet metal part and forms or reforms a thread in the sheet metal part. The disclosure furthermore relates to a component assembly which is produced in accordance with the said method.

Abstract: This invention relates to stable crystalline salts of 5-methyl-(6R,S)-, -(6S)- and -(6R)-tetrahydrofolic acid, to methods of producing these salts and to the use thereof use as a constituent for the production of drugs or as a food additive, and to preparations containing these salts.

Abstract: Polyisocyanates are prepared by a process which comprises (i) preparation of an addition product (A) which contains one group which is reactive toward isocyanate and one isocyanate group by reacting (a) a diisocyanate I with (b) compounds containing two groups which are reactive toward isocyanate, where at least one of the components (a) or (b) has functional groups having differing reactivities toward the functional groups of the other component, (ii) if desired, intermolecular addition reaction of the addition product (A) to form a polyaddition product (P) which contains one group which is reactive toward isocyanate and one isocyanate group and (iii) reaction of the addition product (A) and/or the polyaddition product (P) with a diisocyanate or polyisocyanate II which is different from diisocyanate I.

Abstract: The bifunctional compound N-4-carboxyphenyl-3-(6-oxohydropurin-9-yl) propanamide monopotassium salt occurs in a number of crystal forms which differ in their stability. Of these forms, the most stable is designated Type I, which is a monopotassium salt monohydrate in which the water is held as water of crystallization. Other crystalline forms, designated Type II and Type III, convert to Type I. Methods are disclosed for the synthesis of Type I and for the conversion of Type II or Type III to Type I.

Abstract: In a weight sensor operating according to the principle of electromagnetic force compensation, the essential parts are fabricated from a single block of material. The weight sensor has a load receiver (10), which is connected through an upper guide (12) and a lower (11) guide to the housing-integral base body (1) of the material block. The weight sensor also has several force-reduction translating levers (21,22; 24, 25,25′; 27,27′,28) and coupling elements (18,18′, 23, 26,26′) between the translating levers (21, 22; 24 ,25,25′; 27,27′,28). The housing-integral base body (1) projects in the direction of the load receiver (10), extends into the space between the two guides (11, 12) and forms a support point for the first translating lever (21, 22). The weight sensor is equipped with a coil (34), which is fastened at the longer lever arm (28) of the last translating lever (27,27′,28,29,29′) and is situated in the magnetic field of a permanent magnet.

Abstract: High-functionality polyisocyanates are prepared by a process which comprises

Abstract: Polyisocyanates are prepared by a process which comprises

Abstract: In order to provide the pilots with a display or a map of the terrain below the aircraft, a display is generated on a cockpit display, such as a weather radar, of the contours of the terrain below the aircraft. The terrain contour display is generated from aircraft position information, a terrain data base, and a terrain awareness envelope defined by awareness boundaries. Terrain contours are depicted with the highest terrain within the envelope colored red, high intermediate terrain contours in yellow with varying dot densities, low intermediate terrain contours in green with varying dot densities, and the lowest terrain in black. The green contours can be overwritten with a low density yellow based on a pre-caution envelope which extends certain of the awareness boundaries to provide notice to a pilot of upcoming cautions.

Abstract: An element, for example an element with a hollow body or a bolt element, in particular a nut element, for attachment to a plate-like component, has a ring-shaped recess or annular groove present at an end face of the element facing the component within a raised ring-shaped contact surface. At least one undercut is preferably provided in a side wall of the recess, and also features radial recesses and noses which extend into the ring recess providing security against rotation. A cylindrical punch section or pilot concentric to the central longitudinal axis of the element projects at the said end face within the ring-shaped recess and the outer boundary wall of the cylindrical punch section preferably has ring-shaped undercut.

Abstract: Pure and extremely stable crystalline (6S)- and (6R)-tetrahydrofolic acids, absolutely inert even when exposed to air and elevated temperature without stabilizers being added, are prepared by a crystallization process at a pH of ≧3.5 for the preparation of crystalline (6S)-tetrahydrofolic acid and at a pH of ≧2 for the preparation of crystalline (6R)-tetrahydrofolic acid.

Abstract: Pure and extremely stable crystalline (6S)- and (6R)-tetrahydrofolic acids, absolutely inert even when exposed to air and elevated temperature without stabilizers being added, are prepared by a crystallization process at a pH of ≧3.5 for the preparation of crystalline (6S)-tetrahydrofolic acid and at a pH of ≧2 for the preparation of crystalline (6R)-tetrahydrofolic acid.

Abstract: With the present method, a process which can be employed industrially can be used for the first time for the direct production of aminocyanoacetamide. The method is based on the reaction of cyanoacetamide with nitrites to form nitrosocyanoacetamide at a pH of around 2 and on the subsequent catalytic hydrogenation of nitrosocyanoacetamide to form aminocyanoacetamide.

Abstract: A functional element comprising a shaft part and a head part, or a hollow body part, for attachment to a sheet metal part, in particular for liquid-tight and/or gas-tight attachment to the sheet metal part, without penetrating or perforating the sheet metal part, is characterized in that the head or body part has at least one undercut feature either in an open hollow cavity at its end face confronting the sheet metal part and/or at its outer periphery and is formed in the regions which enter into contact with the sheet metal part with exclusively rounded shaping edges which, during the insertion of the element, cooperate with a shaping die button in order to provide a hooked engagement in form-fitted manner of the sheet metal material, with the undercut feature or with the undercut features. A method of attaching a functional element to a sheet metal part, a component assembly and also at least one die button and a setting head are disclosed and claimed.

Abstract: The present invention relates to a novel process for the selective debenzylation of dibenzylbiotin, which is formed as an intermediate in the synthesis of biotin, but is usually not isolated.

Abstract: An element, for example an element with a hollow body or a bolt element, in particular a nut element, for attachment to a plate-like component, has a ring-shaped recess or annular groove present at an end face of the element facing the component within a raised ring-shaped contact surface. At least one undercut is preferably provided in a side wall of the recess, and also features radial recesses and noses which extend into the ring recess providing security against rotation. A cylindrical punch section or pilot concentric to the central longitudinal axis of the element projects at the said end face within the ring-shaped recess and the outer boundary wall of the cylindrical punch section preferably has ring-shaped undercut.

Abstract: An apparatus for determining the position of the center of gravity of a test body with a test-body receiving plate supported on at least two weighing systems with short displacement in which device the position of the center of gravity is calculated from the particular bearing forces on the weighing systems that the connection between the test-body receiving plate (2) and the weighing systems (12, 13) takes place by means of coupling elements (22, 23) which are permanently connected by their one end to the test-body receiving plate (2), which are connected permanently by their other end to a weighing system (12, 13) and which are designed to be elastically flexible by means of at least one thin area (33, 34) defining a horizontal axis of rotation. This avoids an undefined introduction of force possibly overlaid by frictional forces and frictional moments into the weighing systems and thus increases the measuring accuracy.

Abstract: This invention relates to the use of tetrahydrofolates in natural stereoisomeric form for the production of a pharmaceutical preparation suitable for influencing the homocysteine level, particularly for assisting the remethylation of homocysteine. Clinical areas of application include all anomalies of the homocysteine level, particularly the prevention and treatment of cardiovascular diseases and the prevention of neural tube deficiencies.