Abstract: A molecular assembly having a structural formation of amphiphilic molecules is disclosed where the amphiphilic molecules are selected from a group containing amphiphilic molecules which a) have a hydrophobic moiety and a hydrophilic moiety b) are soluble in a polar aprotic solvent and form self-organizing layer structures in the absence of the polar aprotic solvent, and c) orient molecularly in formed layer structures at an interfacial layer, or in an aqueous environment. The amphiphilic molecules in the formed layer structure are in contact with an aqueous environment. A method for coating a solid surface with a molecular assembly is also disclosed, wherein the amphiphilic molecules are dissolved in a polar aprotic solvent, and resulting solution is applied to a solid surface by spin coating.

Abstract: A method for detecting and influencing an uptake of bioactive substances in a hydrogel material and/or release of bioactive substances from the hydrogel material, wherein the hydrogel material is a polymer network formed from charged and uncharged building blocks, the affinity of which network for bioactive substances is configurable by parameters defining the charged building blocks, and whose electrical charge storage capacity depend on interaction with the hydrogel binding of bioactive substances to the hydrogel material. When the hydrogel material is contacted with a biofluid, a change in electrical resistance and/or a change in charge storage capacity of the hydrogel material is detected. Uptake or a release of bioactive substances from the hydrogel material into the biofluid is determined by change in electrical resistance. The invention further relates to a suitable electrically conductive hydrogel material.

Abstract: Modified plastic surfaces with perfluoropolymers are provided, whereby plastic surfaces that are intended for use under tribological conditions have substantially improved assembly properties and/or sliding friction properties and exhibit a very low degree of wear. Accordingly, modified plastic surfaces with perfluoropolymers are provided in which modified perfluoropolymer (micro)powders are present at the surface of plastics that comprise olefinically unsaturated double bonds at least at the surface such that the modified perfluoropolymer (micro)powders are chemically covalently bonded via a radical coupling of the olefinically unsaturated double bonds with perfluoropolymer (peroxy) radicals of the modified perfluoropolymer (micro)powders after a reactive conversion under mechanical stress at room temperature.

Abstract: Modified plastic surfaces with perfluoropolymers are provided, whereby plastic surfaces that are intended for use under tribological conditions have substantially improved assembly properties and/or sliding friction properties and exhibit a very low degree of wear. Accordingly, modified plastic surfaces with perfluoropolymers are provided in which, after a reactive conversion under mechanical stress at room temperature, at least the reactive —NH groups and/or —OH groups present at the surface of plastics are present in a chemically covalently coupled manner with the perfluoropolymer carboxylic acid halide present at least in the surface-proximate region of modified perfluoropolymer (micro)powders and/or with the grafted (meth)acrylic acid halide present via perfluoropolymer (peroxy) radicals of the perfluoropolymer (micro)powders and/or (meth)acrylic acid that has been modified into (meth)acrylic acid halide before the reactive conversion.

Abstract: Modified plastic surfaces with perfluoropolymers are provided, whereby plastic surfaces that are intended for use under tribological conditions have substantially improved assembly properties and/or sliding friction properties and exhibit a very low degree of wear. Accordingly, modified plastic surfaces with perfluoropolymers are provided in which modified perfluoropolymer (micro)powders are present at the surface of plastics that comprise olefinically unsaturated double bonds at least at the surface such that the modified perfluoropolymer (micro)powders are chemically covalently bonded via a radical coupling of the olefmically unsaturated double bonds with perfluoropolymer (peroxy) radicals of the modified perfluoropolymer (micro)powders after a reactive conversion under mechanical stress at room temperature.

Abstract: Modified plastic surfaces with perfluoropolymers are provided, whereby plastic surfaces that are intended for use under tribological conditions have substantially improved assembly properties and/or sliding friction properties and exhibit a very low degree of wear. Accordingly, modified plastic surfaces with perfluoropolymers are provided in which, after a reactive conversion under mechanical stress at room temperature, at least the reactive —NH groups and/or —OH groups present at the surface of plastics are present in a chemically covalently coupled manner with the perfluoropolymer carboxylic acid halide present at least in the surface-proximate region of modified perfluoropolymer (micro)powders and/or with the grafted (meth)acrylic acid halide present via perfluoropolymer (peroxy) radicals of the perfluoropolymer (micro)powders and/or (meth)acrylic acid that has been modified into (meth)acrylic acid halide before the reactive conversion.

Abstract: The present invention concerns a process for the preparation of a porous carbon structure comprising the steps: a) providing a template comprising voids, b) filling of at least part of the voids with a precursor for the formation of the porous carbon structure, c) carbonizing the precursor for the formation of the porous carbon structure and d) removing at least part of the template. In preferred embodiments the precursor for the formation of the porous carbon structure is a formaldehyde-phenol resin, especially a cross-linked resorcinol-formaldehyde resin. The template further preferably comprises a block copolymer and an amphiphilic molecule, wherein the block copolymer comprises polymeric units of at least one lipophilic monomer and polymeric units of at least one hydrophilic monomer. Further preferred is a process wherein the template comprises a bimodal mixture of particles of silicon dioxide.

Abstract: A method is disclosed for the differentiated sequestration of substances of different substance groups A and B in a sulfated and/or sulfonated hydrogel while simultaneously releasing substances of substance group A or B from the sulfated and/or sulfonated hydrogel into the biofluid. The sulfated and/or sulfonated hydrogel is selected from a group of hydrogels of Type 1, 2, 3, 4 and consist of uncharged and charged components. The charged components are characterized by calculating the number of sulfated or sulfonated groups per repeat unit divided by the molecular mass of the repeat unit, for each of Type 1 2 3 and 4. The swollen hydrogels have a concentration of sulfated or sulfonated groups in mmol/ml for Type 1, Type 2, Type 3 and Type 4. The concentration of substances of each substance group A and group B in the biofluid is influenced by the selection of the type of hydrogel.

Abstract: The invention relates to a method for forming a functional network of human neuronal and glial cells, wherein the cells are introduced into a synthetic hydrogel system with the components polyethylene glycol (PEG) and heparin and are cultivated therein. The cells are introduced into the PEG heparin hydrogel system together with one of the gel components, either PEG or heparin, with which the cells were previously mixed such that the cells are already located in the hydrogel system during the formation of the three-dimensional hydrogel.

Abstract: A polymer-based material having covalently bonded enzymatically degradable peptide sequences not degradable by the biological and metabolic activity of cells and tissues is disclosed, wherein the peptide sequences are incorporated into the polymer-based material or conjugated to the polymer-based material. The peptide sequence can be part of the three-dimensional or two-dimensional structure of the polymer-based material. A controlled degradation of a covalent bond in the peptide sequence is effected. Use of such polymer-based material for an in vitro production of cell cultures or tissues or organs, for an in vivo stabilization of donated cells, tissues or organs is also disclosed. An adhesive bond between the material and the sample, i.e. cells, tissues, or organs is controlledly degradable without destroying the integrity of the sample.

Abstract: Carriers for biomaterials, for polyelectrolyte materials, for electrically polarizable atoms, ions, molecules are provided wherein the material of the carriers is compatible with materials that are used in microelectronics. The arrangement of the biomaterials or biomolecules and optionally of biomolecules, biomaterials, biological functional units or cells adsorbed thereon can be affected with the carrier in a specific manner. Complex molecular machines can be built and tested by the carriers.

Abstract: The invention relates to the non-covalent, self-organizing hydrogel matrix for biotechnological applications containing a covalent polymer peptide conjugate, wherein the covalent polymer peptide conjugate includes conjugates of two or more peptides that are coupled to a polymer chain and the peptide sequence contains a recurring dipeptide motif (BA)n wherein B is an amino acid having positively charged side chain, A is alanine and n is an integer between 4 and 20.

Abstract: The invention relates to the field of measurement technology and concerns a method and an apparatus, such as may be used, by way of example, in thin-layer technology for organic dielectric semi-conducting or conducting layers on substrates. The object of the invention is to indicate a method and an apparatus with which both the surface topography of the coating and that of the surface may be determined independently of one another, at the same position. The object is achieved by a method wherein the three-dimensional topography of the coating is determined using chromatic white light measurement and, subsequently, the thickness of the coating is determined using UV interferometry, and the surface topography of the coated surface is determined by a comparison with the overall dimensions of the coated surface. The object is further achieved by an apparatus wherein an apparatus for chromatic white light measurement and an apparatus for UV interferometry are disposed on a test bench.

Abstract: The invention relates to a method for separating suspended solid materials from aqueous systems, in which the latter is mixed with a flocculant made of polymer colloidal particles with cationic surface charge and subsequently the flocculated material is separated from the aqueous system.

Abstract: The invention relates to a method for separating suspended solid materials from aqueous systems, in which the latter is mixed with a flocculant made of polymer colloidal particles with cationic surface charge and subsequently the flocculated material is separated from the aqueous system.

Abstract: The invention relates to a method and device for production of a three-dimensional article from a material, by means of layered application. According to the invention, a dropwise application is carried out, whereby drops of reaction components are ejected by a nozzle arrangement (3) and applied to a base reaction component (2), arranged on a substrate (1). The material for the three-dimensional article is formed in layers, with reaction of the base reaction component (2) with reaction components on contact, whereby the material is formed on a reaction of the base reaction component with one of the reaction components to give a material with one material property and on another reaction of the base reaction component with another of the reaction components to give a material with another material property. On production of the three-dimensional article, an article section is produced in which a gradual transition between the one material property and the other material property is generated.

Abstract: The invention relates to the field of chemistry and to a fiber composite material which is used, for example, in aircraft. The invention provides a fiber composite material in which delamination can be significantly reduced. This is achieved by a fiber composite material with multiple layers, each containing a duromer matrix and reinforcing fibers, inner layers contain fibers featuring a high level of adhesion to the duromer matrix, outer layers contain fibers featuring a low level or no adhesion to duromer matrix. There is also provided a method in which the reinforcing fibers include a coating and the layers are structured in such a way that, on the interior of the fiber composite material, layers are arranged which contain fibers with a high level of adhesion to the duromer matrix and that outer layers which contain fibers with a lower or low level of adhesion, or no adhesion to the duromer matrix are arranged on and/or around these inner layers.