Abstract: The present invention relates to a method for continuously obtaining carbon dioxide from a carbon-dioxide containing atmosphere, in which a fibrous carrier material charged with polyethylene imine is guided alternately through at least one adsorption zone and at least one desorption zone. In addition, the present invention relates to a device by which the method according to the invention can be carried out.

Abstract: The invention relates to an acoustic transducer for broad-band loudspeakers or magnet-free, electrodynamic head-phones for generating sound, especially for the use in the homogenous and/or inhomogeneous magnetic field of a magnetic resonance tomograph. According to the advantages of the invention, sound having defined characteristics can be generated in such a way that said sound is provided with good quality and high effectiveness within the strong magnetic field of a magnetic resonance tomograph. In addition to music and voice, this comprises the generation of sound for actively controlling noise by generating sound by means of one or several membranes (1) that form air pockets. Said membranes (1) consist of elastic, non-magnetic or slightly magnetic material and are connected to strip conductors (2) in a two-dimensional and solid manner. A Lorentz force which is caused by the magnetic field of the magnetic resonance tomograph is exerted on said strip conductors as the driving power when current flows.

Abstract: The problem of providing an electroacoustic converter for wide-band loudspeakers or magnetless electrodynamic headphones for generating sound, in particular for application in the homogeneous and/or nonhomogeneous magnetic field of a magnetic resonance tomograph, an electroacoustic converter avoiding the drawbacks of the prior art, is essentially resolved in that the electroacoustic converter for generating sound comprises an elastically suspended oscillating body, whereby the oscillating body consists of a non-elastic or low-elastic, non-magnetic or only weakly magnetic material and is flatly and in a fixed manner connected with conductor paths, on which a Lorentz force is acting as the driving force when current is flowing. The Lorentz force is supplied by the magnetic field of the magnetic resonance tomograph.

Abstract: For producing the bone substitute material from collagen and hydroxyapatite, an aqueous solution of cleaned collagen is mixed with a cross-linking agent causing only a partial cross-linking, and the mixture is lyophilized.The quantity of the cross-linking agent is chosen such that the collagen retains its resorbability and its absorptivity vis-a-vis bodily fluids, the material further showing no undesirable side effects.Preferably less than 1% by weight of formaldehyde, one of the preferred cross-linking agents, is added, with reference to the dry weight of collagen, and sintered apatite grains with a diameter of 50-300 .mu.m are used.Such a bone substitute material is stronger and less tearable as previously known materials and insures a good promotion of the growth of own bone tissue and the substitution by it.

Abstract: A multi-layer container which includes a container forming a body of rotation in a tubular or at least partially spherical or conical shape, and having a plurality of layers of weldable sheet metal therewith. The first one of these layers is wrapped directly upon and around the container and the other layers are wrapped around the first layer and one upon the other. Each layer includes at least one joint extending in the longitudinal direction of the container; at least some are only partially filled with welded material.

Abstract: Method for implanting and subsequently removing mechanical implants of an Ni-Ti or a Ti-Nb alloy material which exhibits the memory effect which occurs due to heating of the implant to a temperature above the specific temperature for the alloy material. The memory effect is actuated by heating the implant after implantation of same in the living tissue, and upon completion of the healing process, the implant is substantially returned to its shape upon implantation by cooling it to a temperature below the temperature which actuates the opposite memory effect to facilitate removal.