Abstract: The invention relates in particular to a hydroxyl apatite/silica granular material of defined morphology, a highly porous bone substitute material based on this granular material and a glass ceramic material based in turn thereon as bone substitute material which is characterized by a variable mechanical strength, and shaped bodies of this material, materials of different mechanical strength being preferably used in the shaped body. The bone substitute materials according to the invention are characterized by a high resorbability in vivo.

Abstract: A material or biomaterial comprising silicic acid condensates with a low degree of crosslinking and methods of producing the same are subject matter of the present invention. A method of producing silicic acid structures having a low degree of crosslinking is disclosed, in which a sol is prepared, with further condensation being prevented if certain cross-linkages of the silicic acid are achieved, and wherein, preferably, structures with a size of 0.5-1000 nm are produced, e.g., polyhedral structures or aggregates of the same. Further condensation can be prevented by a chemical reaction of OH groups of the silicic acid condensates, e.g., by esterification or silylation. In one embodiment, the material primarily includes silicon dioxide (SiO2), in particular silicon dioxide that, because of its modification, e.g., by esterification, is nanostructured and has a low degree of crosslinking.

Abstract: A material or biomaterial comprising silicic acid condensates having a low degree of cross-linking, and methods for its production are subject-matter of the invention. A method for the production of silicic acid structures having a low degree of cross-linking is disclosed, wherein a sol is produced, wherein further condensation is prevented when specific cross-linking of the silicic acid is reached, wherein, preferably, structures having a size of 0.5-1000 nm are produced, e.g. polyhedral structures or aggregates of the same. Further condensation can be prevented by means of mixing with a polymer. In one embodiment, this comprises nano-structured, silicon dioxide (SiO2) having a low degree of cross-linking that is embedded in a polymer matrix. The material can be used in medicine for therapeutic purposes, and can enter into direct contact with biological tissue of the body in this connection.

Abstract: Disclosed is a steel, a steel flat product, a steel part produced from it by hot forming with subsequent hardening, and a method for producing a steel part. In order to guarantee to a high degree of reliability that a part possesses high strength values and an increased elongation at break, the steel contains (in % wt.) C: 0.15-0.40%, Mn: 1.0-2.0%, Al: 0.2-1.6%, Si: 0-1.4%, total of the contents of Si and Al: 0.25-1.6%, P: 0-0.10%, S: 0-0.03%, Cr: 0-0.5%, Mo: 0-1.0%, N: 0-0.01%, Ni: 0-2.0%, Nb: 0.012-0.04%, Ti 0-0.40%, B: 0.0010-0.0050%, Ca: 0-0.0050%, remainder iron and unavoidable impurities.

Abstract: The invention relates in particular to a hydroxyl apatite/silica granular material of defined morphology, a highly porous bone substitute material based on this granular material and a glass ceramic material based in turn thereon as bone substitute material which is characterised by a variable mechanical strength, and shaped bodies of this material, materials of different mechanical strength being preferably used in the shaped body. The bone substitute materials according to the invention are characterised by a high resorbability in vivo.

Abstract: A bending machine (1) is provided wherein components of the existing abutment system, namely a drive part or a carriage (7), which can be directly or indirectly detachably coupled to the lower tool, are used instead of an additionally integrated device (axle) for displacing lower tools (2) transversely in relation to their length. In this way, the existing axle of the abutment system can also be used to adjust the tool.

Abstract: The invention relates in particular to a hydroxyl apatite/silica granular material of defined morphology, a highly porous bone substitute material based on this granular material and a glass ceramic material based in turn thereon as bone substitute material which is characterised by a variable mechanical strength, and shaped bodies of this material, materials of different mechanical strength being preferably used in the shaped body. The bone substitute materials according to the invention are characterised by a high resorbability in vivo.

Abstract: A throttling valve assembly has an outer housing that is sealed. An actuator is connected to a pressure balanced shaft that extends into the housing to operate a plurality of linkages that can rotate blades in tandem. With the surrounding housing sealed, the shaft penetrations of the blade support shafts no longer need seals or a purge system to supply process gas during times of reduced pressure in situations with the blades nearly closed. A pressure equalization system has balance passages internal to the housing to allow flow from higher pressure zones to lower pressure zone of the process gas so as to avoid creation of a condition that can draw air into any zones of reduced pressure in the housing.

Abstract: A bending machine (1) is provided wherein components of the existing abutment system, namely a drive part or a carriage (7), which can be directly or indirectly detachably coupled to the lower tool, are used instead of an additionally integrated device (axle) for displacing lower tools (2) transversely in relation to their length. In this way, the existing axle of the abutment system can also be used to adjust the tool.

Abstract: The invention relates to a higher-strength steel strip or steel sheet comprising a predominantly ferritic-martensitic microstructure with a martensite content of between 4 and 20%, wherein the steel strip or steel sheet, apart from Fe and impurities due to smelting, comprises (in % by weight) 0.05-0.2% C, ≦1.0% Si, 0.8-2.0% Mn, ≦0.1% P, ≦0.015% S, 0.02-0.4% Al, ≦0.005% N, 0.25-1.0% Cr, 0.002-0.01% B. Preferably the martensite content is approximately 5% to 20% of the predominantly martensitic-ferritic microstructure. Such a higher-strength steel strip or steel sheet made from a dual phase steel comprises good mechanical/technological properties even after being subjected to an annealing process which includes an overageing treatment. Furthermore, the invention relates to a method for producing steel strip or steel sheet according to the invention.

Abstract: The invention relates to an inorganic resorbable bone substitute material based on calcium phosphates and to a method for producing the same. The material is characterized in that it comprises a loose cyrstal structure, i.e., the crystallites are not tightly connected as in a solid body (ceramic), but they are interconnected via only a few molecular groups. The volume which is occupied by collagen in natural bone is provided in the material as interconnecting pores in the nanometer range. A second pore size, also interconnecting and in the range of a few micrometers, permits collagen fibers to grow inside during tissue formation. These fibers are nucleators for the inserting biomineralization (formation of the endogenous biological apatite).

Abstract: Preparation of inorganic aerogels based on oxides of the metals magnesium, aluminum, silicon, tin, lanthanum, titanium, zirconium, chromium and/or thorium by producing a hydrogel in a sol/gel process, replacing the water in the hydrogel by an organic solvent, and drying the solvent-moist gel, takes place by conducting the drying step by exposing the solvent-moist gel to an ambient temperature which is above the boiling temperature of the solvent and at a pressure which is below the supercritical pressure of the solvent in such a way that the solvent within the gel is heated up very rapidly and evaporates.