Abstract: A fuel cell, comprising a housing, at least one first proton-conducting layer covered by catalyst layers on both sides, gas-permeable electrodes on the catalyst layers and second layers arranged on both sides of the first layers, whereby said second layers take the form of electro-conductive plates that are located in closely adjacent electro-conductive contact with the electrodes, define gas conducting channels in conjunction with the electrodes and one layer touches the other layer by means of a substantially planar surface. The electrodes are made of at least one layer of electro-conductive polymer fibers that is intersected by flow channels running parallel to the surface thereof in at least one direction.

Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Abstract: The use of inorganic or organic polyacids for the treatment of inorganic fertilizers, in particular the use of the polyacids as a mixture with at least one nitrification inhibitor for the treatment of inorganic fertilizers; the use of selected pyrazole derivatives as nitrification inhibitor in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations, as well as the corresponding treated inorganic fertilizers per se; and novel pyrazole derivatives which can be used as nitrification inhibitors in inorganic fertilizers and also as stabilizers of liquid manure or liquid fertilizer formulations are described.

Abstract: A gas generator, in particular for vehicle occupant restraint systems, with at least one combustion chamber containing propellant, and with at least one igniter arranged close to the propellant, for igniting the propellant is characterized in that the combustion chamber is separated from the igniter by an expansion chamber surrounding the igniter and provided for the gas developing on deflagration of the ignition material.

Abstract: A process for preparing pyrazoles of the formula I ##STR1## in which R.sup.1,R.sup.2,R.sup.3 independently of one another are C.sub.1 - to C.sub.20 -alkyl, C.sub.3 - to C.sub.8 -cycloalkyl, or C.sub.7 - to C.sub.20 -aralkyl or aryl, unsubstituted or substituted by C.sub.1 - to C.sub.4 -alkyl, halogen and/or nitro,R.sup.1,R.sup.3 are additionally independently of one another hydrogen,by reacting a carbonyl compound of the formula R.sup.1 --CH.sub.2 --CO--R.sup.2, in which R.sup.1 and R.sup.2 are as defined above in the presence of a strong base witha) formic esters of the formula H--COOR.sup.4, in which R.sup.4 is C.sub.1 - to C.sub.8 -alkyl at from (-20) to 70.degree. C. and a pressure of from 1 to 50 bar orb) carbon monoxide at from 0 to 100.degree. C. and a pressure of from 1.5 to 150 barand reacting the resulting intermediate, the hydrazines of the formula R.sup.3 --NH--NH.sub.2, in which R.sup.3 is as defined above, and an inorganic or organic acid at from 0 to 90.degree. C.

Abstract: A regulating valve comprising a housing having a cylindrical valve chamber, the valve chamber being provided with at least one inlet and at least two outlets, the inlet and the outlets being at least partially closeable as needed by a common valve body arranged in the valve chamber and rotatable around an axis, the valve body being operable by an actuator, the inlet and/or at least one of the outlets being surrounded by a sealing device on the side of the housing facing the valve body and the sealing device being able to be brought into sealing engagement with the valve body under elastic preload. The valve body is designed having the shape of the segment of a cylinder and is bounded on the peripheral side by two boundary surfaces which each have an edge on the side facing the housing, the edge overtravelling the inlet during its opening being designed as an efflux edge and having an elliptically shaped recess extending in axial direction.

Abstract: The invention relates to vectors which include an inducible selection gene and a sequence which codes for a heterologous polypeptide. In a particular example the selection gene comprises the tetA and tetR genes. The vector may also include a sequence which is capable of conferring stability on the vector, such as the cer sequence, a transcription terminator, such as gene 32 from bacteriophage T4, a ribosome binding site, and a multi-cloning site. Hosts transformed with the vector, processes for preparing these hosts, and processes for preparing polypeptides using these hosts.

Abstract: A regulating valve comprising a housing having a cylindrical valve chamber, the valve chamber being provided with at least one inlet and at least two outlets, the inlet and the outlets being at least partially closeable as needed by a common valve body arranged in the valve chamber and rotatable around an axis, the valve body being operable by an actuator, the inlet and/or at least one of the outlets being surrounded by a sealing device on the side of the housing facing the valve body and the sealing device being able to be brought into sealing engagement with the valve body under elastic preload. The valve body is designed having the shape of the segment of a cylinder and is bounded on the peripheral side by two boundary surfaces which each have an edge on the side facing the housing, the edge overtravelling the inlet during its opening being designed as an efflux edge and having an elliptically shaped recess extending in axial direction.

Abstract: A mudflap for vehicles, whereby said the mudflap has a flat main body (1) with ribs (11), arranged in a V-formation for the intercepting, slowing-down and diverting of water thrown up from the wheel of a vehicle, and channels (24, 26, 29), for guiding water intercepted and diverted in the central area (9) down and away, located in two side areas (10) arranged symmetrically about the central longitudinal plane (8). The ribs are provided in a V-formation inclined downwardly from their apex in the region of the central longitudinal plane (8), and have a cross-section which tapers from the main body (1) to the free end. They are arranged so close to each other that the grooves (14) between the ribs (11) have approximately the same cross-sectional area, admittedly the other way round, as the cross-sectional area of the ribs (11).

Abstract: A bottom unit for the combustion chamber of a liquid-fueled rocket including a bottom plate held on a swivel bearing and having circumferentially distributed openings for the injection of the two fuel components as well as two separate groups of supply passages which are connected to these fuel injection openings. The swivel bearing consists of a rigid thrust plate and a rigid hanger plate which are held and joined together by an internally situated, first annular body of rubber elastic material and by a second annular body of rubber elastic material surrounding the first at a radial distance therefrom. The one group of supply passages is formed by the cavity surrounded by tthe first annular body and the other group of supply passages by the annular space between the first and the second annular body.

Abstract: A coupler for coupling inner and outer, radially-spaced, rotatable machine components has a generally annular body for location in the radial space between the machine components. Inner and outer drive element devices project from the generally annular body for respectively engaging drivingly the inner and outer machine components. At least one of the drive element devices is at least one at least circumferentially-resilient spring leaf projecting from the generally annular body at one end with a drive element for engaging the machine component engaged thereby on the other end.