Abstract: The present invention relates to a method for testing different selected materials and/or surface structures for the culture of cells and/or microorganisms.

Abstract: The present invention provides an article with at least one switching segment. The switching segment comprises a shape-memory compound and an isolating region surrounding the shape memory compound. The present invention also provides a method of producing such an article.

Abstract: The invention relates to a polyimide microparticles which can be obtained by means of the following steps: a) a polymer solution consisting of at least one polyimide polymer and a solvent or a solvent mixture is produced according to methods known per se, b) microparticles are formed from the polymer solution by spraying or by thermal phase inversion, c) the microparticles obtained in step b) are treated with an aqueous functionalization solution containing an amine-containing modifier at a high temperature, with or without stirring, and d) the modified obtained are washed and optionally dried, according to methods known per se.

Abstract: The present invention relates to a method for testing different selected materials and/or surface structures for the culture of cells and/or microorganisms, said method comprising the following steps: i) providing a plurality of different selected materials and/or surface structures to be tested in the form of beaker-shaped inserts, wherein the beaker-shaped inserts are dimensioned in such a way that a beaker-shaped insert can be inserted in a substantially accurately fitting manner into a well of a multiwell plate suitable for cell culture, wherein each beaker-shaped insert has walls, a base, and an opening in the side facing away from the base, wherein the walls and base of the beaker-shaped inserts are liquid-tight, and wherein each beaker-shaped insert has a selected material and/or a selected surface structure, at least on the inner face of the base; ii) inserting the beaker-shaped inserts into wells of multiwell plates of appropriate dimensioning so that the outer face of the beaker base points towards

Abstract: The invention relates to a molded foam body having anisotropic shape memory properties, to a method for manufacturing such a molded foam body and to an article, which contains or is composed of such a molded foam body. The molded foam body according to the invention comprises at least one shape memory polymer, which forms a foam structure having asymmetric pores oriented substantially in a common, first spatial direction (L). Said molded foam body is manufactured by foaming the polymer by means of the release of a gaseous propellant under conditions that promote the release and the escape of the propellant from the polymer substantially in a main flow direction. Following thermomechanical programming, such a shape memory foam exhibits a direction-dependent level of recovery and recovery forces when reheated.

Abstract: The present invention provides an article with at least one switching segment. The switching segment comprises a shape-memory compound and an isolating region surrounding the shape memory compound. The present invention also provides a method of producing such an article.

Abstract: In a polyimide molded body, in particular a polyimide membrane which is functionalized with a chemical group and a method for production thereof, a molded body or membrane is obtained, whereby a pre-prepared polyimide body, as starting material, is brought into contact with an aqueous modifier solution for a period of 1 second to 1 hour. The modifier solution contains at least one modifier substance at least partially dissolved therein, which comprises a primary or secondary amino group, or a similar amino group and additionally at least one further functional group per molecule. The polyimide molded body is brought to an elevated temperature, either during the contact period with the modifier solution or thereafter and then purified and dried. The membrane obtained according to the invention may be functionalized in a targeted adjustable manner and has a high functionalization degree. The functionalization may be achieved simply and economically in an aqueous medium.

Abstract: The invention is directed to a matrix structure for inducing a neofascia with at least one two-dimensional matrix of at least one biocompatible and resorbable polymer, wherein the surface of the matrix is designed to immobilize tissue cells, in particular autologous fibrocytes of the fascia transversalis, and to reduce a preferably three-dimensional tissue growth in vitro or in vivo. The invention is also directed to a hybrid matrix system, which includes the matrix structure and tissue cells immobilized thereon. The novel matrix as well as the fascia hybrid are characterized by a high biocompatibility and overcome the disadvantages of non-degradable implants, thereby promoting formation of a neofascia with native biomechanical properties.

Abstract: The invention relates to a polyimide microparticles which can be obtained by means of the following steps: a) a polymer solution consisting of at least one polyimide polymer and a solvent or a solvent mixture is produced according to methods known per se, b) microparticles are formed from the polymer solution by spraying or by thermal phase inversion, c) the microparticles obtained in step b) are treated with an aqueous functionalization solution containing an amine-containing modifier at a high temperature, with or without stirring, and d) the modified obtained are washed and optionally dried, according to methods known per se.

Abstract: In a polyimide molded body, in particular a polyimide membrane which is functionalized with a chemical group and a method for production thereof, a molded body or membrane is obtained, whereby a pre-prepared polyimide body, as starting material, is brought into contact with an aqueous modifier solution for a period of 1 second to 1 hour. The modifier solution contains at least one modifier substance at least partially dissolved therein, which comprises a primary or secondary amino group, or a similar amino group and additionally at least one further functional group per molecule. The polyimide molded body is brought to an elevated temperature, either during the contact period with the modifier solution or thereafter and then purified and dried. The membrane obtained according to the invention may be functionalized in a targeted adjustable manner and has a high functionalization degree. The functionalization may be achieved simply and economically in an aqueous medium.