Abstract: A catalyst comprising transition metal nanoparticles, stabilizing ligands, and a support material, wherein at least a portion of the stabilizing ligands are adsorbed on the surface of the transition metal nanoparticles such as to form stabilized transition metal nanoparticles, wherein the stabilized transition metal nanoparticles are supported on the support material, wherein the catalyst displays a molar ratio of the stabilizing ligands to the transition metal in the nanoparticles calculated as the element, wherein the molar ratio is comprised in the range of from 0.1 to 25.

Abstract: A torque limiter for a surgical screwdriver that includes an outer sleeve (1); a snap sleeve (3), which is arranged in and rotates with the outer sleeve; a rolling element cage (6), which is arranged in the snap sleeve; an inner sleeve (10), which is arranged in the rolling element cage; and a force-transmitting shaft (11), which is received in and rotates with the inner sleeve. The inner wall of the outer sleeve is provided with recesses (8) that extend parallel to a rotational axis of the force-transmitting shaft. The rolling element cage is provided with a plurality of rolling element receiving areas (5), each of which holds a rolling element (4), and with a number of noses (7), which engage into the recesses. The inner sleeve is provided with a plurality of notches (9), which extend in a V-shape parallel to the axis and which receive the rolling elements.

Abstract: A pretensionable locking system, a method for producing a locking system and a medical-technical instrument including a locking system. The locking system (2) includes a locking body (10) with an inner thread (12), and an inner locking body (20) with an outer thread (22). In a pretensioned position, the inner thread lies against the outer thread in a first longitudinal axial direction (80) and is pretensioned against the outer thread. In a locked position, the outer locking body is fixed on the inner locking body by screwing the inner thread onto the outer thread. The outer locking body has a resilient retaining element (14) that projects radially inward, and the inner locking body has a rigid bulge (24) that projects radially outward. In the pretensioned position, the retaining element lies against the bulge in a second longitudinal axial direction (85) that is opposite the first longitudinal axial direction.

Abstract: A combined cycle power plant and method for operating a combined power plant with stack energy control are presented. The combined cycle power plant includes a gas turbine, a heat recovery steam generator including a plurality of heating surfaces, and a steam turbine. The heating surfaces may be partially bypassed to reduce steam production in the heat recovery steam generator during power plant startup. Less energy may be extracted from exhaust gas of the gas turbine. More energy may be dumped through an exhaust stack. The steam turbine may start without restriction of a gas turbine load during power plant startup. The steam turbine may start without increasing a size of an air cooled condenser while maintaining a higher load of a gas turbine during power plant startup.

Abstract: The present invention is in the field of catalysis. More particularly, the present invention is directed to supported precious metal catalysts, preferably palladium and/or platinum metal catalysts, having a high metal loading, a high degree of dispersion and a high degree of edge-coating. The present invention is further directed to a process for producing these catalysts, as well as to the use of these catalysts in chemical reactions.

Abstract: The present invention is in the field of catalysis. More particularly, the present invention is directed to supported precious metal, preferably palladium and/or gold metal catalysts, having a high degree of dispersion and a high degree of edge-coating. The present invention is further directed to a process for producing these catalysts, as well as to the use of these catalysts in chemical reactions.

Abstract: A combined cycle power plant and method for operating a combined power plant with stack energy control are presented. The combined cycle power plant includes a gas turbine, a heat recovery steam generator including a plurality of heating surfaces, and a steam turbine. The heating surfaces may be partially bypassed to reduce steam production in the heat recovery steam generator during power plant startup. Less energy may be extracted from exhaust gas of the gas turbine. More energy may be dumped through an exhaust stack. The steam turbine may start without restriction of a gas turbine load during power plant startup. The steam turbine may start without increasing a size of an air cooled condenser while maintaining a higher load of a gas turbine during power plant startup.

Abstract: A torque limiter has an outer sleeve whose interior wall possesses at least one peripheral groove and a plurality of recesses running parallel to the axis. An elastic ring is inserted in each groove. A rolling-element cage has the same number of slots as the number of recesses possessed by the outer sleeve that receives it. A plurality of the rolling elements that are inserted into the rolling element slots. The inner sleeve which slots into the rolling-element cage and whose exterior wall possesses the same number of V-shaped notches—running parallel to the axis—as the number of rolling element slots is provided. A tool or system is provided to restrict the relative torsion between the rolling-element cage and the outer sleeve between a first received position—and a second received position—when the outer sleeve is loosened by rotation and the rolling elements which slot into the notches on the inner sleeve change position vis-à-vis the recesses on the outer sleeve.

Abstract: A screw driver for a screw having a drive socket having an axially extending shaft with a bifurcated tip, the tip having a cross-sectional profile for insertion into a cross-sectional profile of the screw socket. The shaft has a tapered section adjacent the bifurcated tip. A bushing is mounted on an outer surface of the shaft for axial movement therealong. The bushing has inwardly extending protrusions for engaging the tapered section on the shaft upon movement in the axial direction along the shaft in a direction away from the tip. This allows the selective capture or release of the screw by the shaft tip by axial movement of the bushing away from and towards the shaft distal tip.

Abstract: A screw driver for a screw having a drive socket having an axially extending shaft with a bifurcated tip, the tip having a cross-sectional profile for insertion into a cross-sectional profile of the screw socket. The shaft has a tapered section adjacent the bifurcated tip. A bushing is mounted on an outer surface of the shaft for axial movement therealong. The bushing has inwardly extending protrusions for engaging the tapered section on the shaft upon movement in the axial direction along the shaft in a direction. away from the tip. This allows the selective capture or release of the screw by the shaft tip by axial movement of the bushing away from and towards the shaft distal tip.

Abstract: A torque limiter has an outer sleeve whose interior wall possesses at least one peripheral groove and a plurality of recesses running parallel to the axis. An elastic ring is inserted in each groove. A rolling-element cage has the same number of slots as the number of recesses possessed by the outer sleeve that receives it. A plurality of the rolling elements that are inserted into the rolling element slots. The inner sleeve which slots into the rolling-element cage and whose exterior wall possesses the same number of V-shaped notches—running parallel to the axis—as the number of rolling element slots is provided. A tool or system is provided to restrict the relative torsion between the rolling-element cage and the outer sleeve between a first received position—and a second received position—when the outer sleeve is loosened by rotation and the rolling elements which slot into the notches on the inner sleeve change position vis-à-vis the recesses on the outer sleeve.

Abstract: A screw driver for a screw having a drive socket having an axially extending shaft with a bifurcated tip, the tip having a cross-sectional profile for insertion into a cross-sectional profile of the screw socket. The shaft has a tapered section adjacent the bifurcated tip. A bushing is mounted on an outer surface of the shaft for axial movement therealong. The bushing has inwardly extending protrusions for engaging the tapered section on the shaft upon movement in the axial direction along the shaft in a direction. away from the tip. This allows the selective capture or release of the screw by the shaft tip by axial movement of the bushing away from and towards the shaft distal tip.

Abstract: Solid mixtures of a reactive size and starch, which are obtainable by mixing at least one reactive size with at least one starch in a melt in the presence of at least one destructuring agent for starch under the action of shear forces at from 65 to 250° C. and cooling the melt to room temperature, are used in the form of aqueous dispersions as process assistants in papermaking.

Abstract: An aqueous stabilized enzyme preparation to be used for measuring the amount of .alpha.-amylase in a liquid sample like serum or urine containing a blocked and labeled oligosaccharide being the substrate for the .alpha.-amylase to be measured in the presence of exo-enzymes which aqueous preparation, preferably consisting of two separate solutions is stabilized by adding a buffer, a taurocholic acid derivative, an albumin, and a polyhydric alcohol.

Abstract: Partial thromboplastin time (PTT) is determined for monitoring and controlling heparin therapy with a test kit having increased sensitivity to heparin. Increased sensitivity is obtained by including with reagents in the test kit an organic sulfuric acid or salt thereof such as dodecylbenzenesulfuric acid--sodium salt and/or an organic sulfuric acid ester or salt thereof such as sodium laurylsulfate.