Abstract: A heat pipe having a working chamber having an evaporator region operatively connected to a heat source, and a condenser region operatively connected to a heat sink. A working fluid is provided in the working chamber, and heat is transferred from the heat source to the heat sink by the working fluid in a first state of operation. The heat pipe is a switchable and/or programmable thermal diode or a switchable and/or programmable heat switch, at least one activatable functional material is provided, which is arranged and configured to keep the evaporator region free of the working fluid and/or to prevent the working fluid from evaporating in a second state of operation, in order to reduce and/or hinder heat transfer and/or to alter the preferential direction of heat conduction. A system and method for switching and/or programming heat transfer in a heat pipe are also provided.

Abstract: A method for producing a thermoelectric module (1) having an inner tube (2), and an outer tube (8), and at least two thermoelectric base elements (5), the method including providing the thermoelectric base elements (5) outside the inner tube (2) or inside the outer tube, and widening the inner tube (2) and/or shrinking the outer tube (8). At least one plastically or elastically deformable functional layer is applied between the inner tube (2) and the thermoelectric base elements (5) and/or between the thermoelectric base elements (5) and the outer tube (8) before the widening/shrinking, and the thermoelectric base elements (5) are operatively connected to the functional layer parallel to the inner tube (2), such that an interference fit assembly is produced by the widening of the inner tube (2) and/or the shrinkage of the outer tube (8).

Abstract: A method for stabilization and/or control and/or regulation of the working temperature of a cyclic-process-based system having at least one heat-exchanger unit with at least one calorically active material element. It is essential that a base temperature of the calorically active material element (11, 12) is controlled by a cooling fluid. A heat-exchanger unit, a refrigeration machine, and a heat pump according to this are also provided.

Abstract: An exhaust-gas aftertreatment system for an internal combustion engine, having a catalyst device, which is designed to catalytically react at least one exhaust-gas component with a reactant, and a reactant-metering device, which is arranged upstream of the catalyst device along a flow path of the exhaust gas through the exhaust-gas aftertreatment system. The reactant-metering device has at least one exhaust-gas flow nozzle.

Abstract: An exhaust-gas aftertreatment system for an internal combustion engine, having a catalyst device, which is designed to catalytically react at least one exhaust-gas component with a reactant, and a reactant-metering device, which is arranged upstream of the catalyst device along a flow path of the exhaust gas through the exhaust-gas aftertreatment system. The reactant-metering device has at least one exhaust-gas flow nozzle.

Abstract: A medical tool for dental treatments by means of a laser, the light guide of which runs in a hand piece. The light guide is provided with a laser module including power circuitry and a second laser module is provided with the first laser module, operating at a different wavelength.

Abstract: Disclosed is a method for the medical treatment of patients by means of a laser beam from a semiconductor laser or diode laser. In said method, the laser beam is to be applied to the area to be treated in the form of pulses.

Abstract: A medical instrument for dental treatments using a laser that comprises at least two laser modules with different wavelengths, the modules being connected to an electronic controller. A changeover switch is situated between the electronic controller and the laser modules, the switch being used to connect the electronic controller to one or other of the laser modules.

Abstract: A handpiece for a medical laser comprising an inner channel (6, 8, 8.1) into which a laser fiber (7) is fitted and protrudes with a free end portion of length (1) from a channel mouth (10), the length (1) of the laser fiber (7) protruding from the channel mouth (10) is adjustable.

Abstract: In a process for treating disorders, especially inflammatory disorders, in the oral cavity, by introducing a substance activable by a light source, the substance comprises the active ingredient indocyanine green and the spectrum of the light source emits significant proportions in the range of 700-1000 nm.

Abstract: A medical tool for dental treatments by means of a laser, the light guide of which runs in a hand piece. The light guide is provided with a laser module including power circuitry and a second laser module is provided with the first laser module, operating at a different wavelength.

Abstract: In a device for the automatic production of dental replacement parts, a blank 13 is fitted in a substantially plate-shaped carrier body 10 which is so dimensioned that the blank 13 does not exceed the carrier body 10 in any direction. The carrier body 10 serves not only for holding the blank 13 in the working machine but also for protecting it during its automatic handling in magazines or the like. The carrier body 10 is provided with a bar code 20 which relates to the material and dimensions of the blank 13 and may identify data according to which the blank 13 is to be worked The bar code 20 is adapted to be changed by the working machine so as to prevent the carrier body 10 from being reused with the same or a different blank 13.

Abstract: In a device for the automatic production of dental replacement parts, a blank 13 is fitted in a substantially plate-shaped carrier body 10 which is so dimensioned that the blank 13 does not exceed the carrier body 10 in any direction. The carrier body 10 serves not only for holding the blank 13 in the working machine but also for protecting it during its automatic handling in magazines or the like. The carrier body 10 is provided with a bar code 20 which relates to the material and dimensions of the blank 13 and may identify data according to which the blank 13 is to be worked The bar code 20 is adapted to be changed by the working machine so as to prevent the carrier body 10 from being reused with the same or a different blank 13.

Abstract: In a device for the automatic production of dental replacement parts, a blank 13 is fitted in a substantially plate-shaped carrier body 10 which is so dimensioned that the blank 13 does not exceed the carrier body 10 in any direction. The carrier body 10 serves not only for holding the blank 13 in the working machine but also for protecting it during its automatic handling in magazines or the like. The carrier body 10 is provided with a bar code 20 which relates to the material and dimensions of the blank 13 and may identify data according to which the blank 13 is to be worked. The bar code 20 is adapted to be changed by the working machine so as to prevent the carrier body 10 from being reused with the same or a different blank 13.