Abstract: An injection device for administering a substance, including a housing, a plunger rod which can be moved relative to the housing, at least one retaining element associated with the rod to hold the rod relative to the housing, and a displaceable locking sleeve which can be displaced relative to the housing from one position in which the sleeve holds the at least one retaining element in a retaining position to a second position in which the at least one retaining element is released.

Abstract: The present invention provides for a structure for use in a thermo chemical fuel production process, said structure having a void phase and a solid phase, wherein the structure has an effective total optical thickness for solar radiation or effective total optical thickness for infrared radiation of from 0.1 to 10, wherein the solid phase has a geometrical specific surface area of more than 2*103 m?1 and wherein the solid phase comprises and preferably consists of a reactive material.

Abstract: The present invention provides for a structure for use in a thermo chemical fuel production process, said structure having a void phase and a solid phase, wherein the structure has an effective total optical thickness for solar radiation or effective total optical thickness for infrared radiation of from 0.1 to 10, wherein the solid phase has a geometrical specific surface area of more than 2*103 m?1 and wherein the solid phase comprises and preferably consists of a reactive material.

Abstract: An electrical resistance heating element for a heating device, with at least one flow canal through which the gaseous medium is able to flow from a canal inlet side to a canal outlet side of the resistance heating element, and with at least one heating resistor that extends essentially in the direction of the flow canal, with the medium flowing past the heating resistor and being heated in the process. The heating resistor is rod-shaped and produced from an electrically conductive ceramic material. The electrical resistance heating element is intended for installation in a heating tube into which air, for example, is blown at one end. The heated flow of air exits from the other end of the heating tube.

Abstract: This catalytically active or inactive diffuser is suitable for exhaust gas cleaning systems of internal combustion engines. It consists of a ceramic structure (8) which is obtained from a ceramized polyurethane foam. This ceramic structure (8) can be coated with surface area-increasing and/or oxygen-storing materials and/or noble metals in order to bring about a catalytic action with the gas molecules flowing through it. Because the diffuser is porous in every direction in its interior, a gas and its pressure can spread out equally on all sides through the entire diffuser volume. A virtually homogeneous velocity distribution arises over the entire flow cross section, and increased turbulence is obtained, which leads to more wall contacts of the harmful substance molecules. At the same time, the flow to and through downstream systems over their cross sections with homogeneously mixed exhaust gas including any reactants metered in is more uniform.