Abstract: A method for the regeneration of an NOx store in the exhaust gas of internal combustion engines is presented. The NOx store takes up NOx from the exhaust gas when there is an oxygen excess therein and regenerates by outputting nitrogen when there is an oxygen deficiency in the exhaust gas. In the method, a reversal is made alternately between first phases having oxygen excess in the exhaust gas and second phases having oxygen deficiency. In the method, the oxygen deficiency in the exhaust gas is generated to regenerate the storage catalytic converter via a specific mass of fuel excess in the exhaust gas ahead of the NOx store. This mass is to be held constant.

Abstract: In a method and device for selective catalytic NOx reduction in oxygen-containing exhaust gases using ammonia and a reduction catalyst, gaseous ammonia is made available by heating a solid storage medium in a container. The method and device are suitable for use in motor vehicles in particular.

Abstract: A structural arrangement for NOx sensors including a first selectively oxygen ion-conductive layer and a second gas-permeable, nonconductive layer, the latter having a porous spinel structure or porous platinum. The oxygen ion-conductive layer made from a mixed-conductive ceramic can have an additional layer of a material which is catalytically inactive to NOx.

Abstract: The invention proposes a sensing element which serves to determine the concentration of oxidizable constituents in a gas mixture, in particular of hydrocarbons, NO, and NH3. Electrically conductive spinels of the general formula ABB′O4, or electrically conductive pseudobrookites of the general formula ABB′O5, serve in this context as the material for the measurement electrode.

Abstract: A method and a device for selective catalytic NOx reduction in oxygen-containing exhaust gases using ammonia and a reduction catalyst (9) are described, according to which gaseous ammonia is made available by heating a solid storage medium (2) in a container (1). The method and the device are suitable for use in motor vehicles in particular.

Abstract: A method and arrangement is described for determining oxidizable constituents in a gas mixture by using a solid electrolyte cell with at least one reference electrode and at least one working electrode made of electrically conducting mixed oxides which is sensitive to the oxidizable constituents, with the current between the reference electrode and the working electrode induced by electrochemical oxidation of a gas constituent to be determined being measured.

Abstract: An intramedullary nail, comprises a proximal portion, a middle portion and a distal portion. The proximal portion has a longitudinal slot and the distal portion has at least one transversal bore. The proximal portion has a longitudinal axis and a longitudinal bore extending over the longitudinal extension of the slot in the distal direction. The longitudinal bore has an internal thread. An insert which is intended to be inserted in the longitudinal bore. The insert comprises a guiding bore in the form of a slot which is intended to receive fixing elements. The alignment of the guiding bore of said insert is transverse with respect to the longitudinal axis of the proximal portion. The insert has a compression screw adapted to be screwed into said internal thread of the longitudinal bore of the proximal portion to move a fixing element in the direction of the longitudinal axis of the intramedullary nail.

Abstract: An intramedullary nail apparatus comprises a nail having a proximal portion, a middle portion and a distal portion. The proximal portion has a longitudinal slot adapted to receive at least one fixing element and the distal portion has at least one transverse bore. The proximal portion has a longitudinal axial bore. The apparatus further includes a set of inserts, each of which is adapted to be inserted in the longitudinal bore. Each insert has at least one guiding bore, the orientation and position of which is different for each of the inserts. A method of treating fractures utilizing the intramedullary nail apparatus is also disclosed.

Abstract: The present invention relates to compounds that exhibit inhibitory activity against matrix metalloproteases ("MMPs"). Because MMPs are known to play a role in tissue degradation, the compounds of the present invention may be useful in preventing or treating diseases associated with excess MMP activity. In particular, the compounds have a structure according to Formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are various substituents as described in the specification; and Q is an alkyl chain, an alkenyl chain, a heteroalkyl chain, or a heteroalkenyl chain, wherein said chain has 2, 3, or 4 chain atoms and is unsubstituted or substituted with one or more alkyl moieties; or a pharmaceutically-acceptable salt, or biohydrolyzable alkoxyamide, acyloxyamide, or imide thereof. Preferred are those compounds where Q is an alkyl chain having 2, 3 or 4 chain atoms.

Abstract: The actabular socket supporting ring has a modular construction and is formed of a supporting ring having two securing straps for a cement-free attachment in and on the corresponding bone portions, of a socket cup which is pivotably adjustable in the supporting ring and attachable to the supporting ring by a securing element without the use of bone cement, and of an insert receiving the joint head. The modular construction, and in particular, the pivotable arrangement of the socket cup in the supporting ring, allows a biomechanically optimal alignment of the socket cup, and thus, of the insert receiving the joint ball, and the securing of the socket cup to the supporting ring by a securing element allows an entirely cement-free anchorage of all components.