摘要:
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.
摘要:
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.
摘要:
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 the inner face of the base of a well of the multiwell plate; iii) culturing the cells in the lumen of the beaker-shaped inserts, and to a kit for carrying out this method.
摘要:
The present invention relates to a method for testing different selected materials and/or surface structures for the culture of cells and/or microorganisms.
摘要:
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.
摘要:
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. The membranes obtained are suitable for use in the technical, biotechnological and medical fields and as starter membranes for the production of affinity membranes.
摘要:
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.
摘要:
In a method of manufacturing a double-layer membrane of different polymers or polymer mixtures with opposite blood-compatible and tissue-compatible surfaces, a first polymer solution of a blood-compatible polymer and a second solution of a tissue-compatible polymer are extruded concurrently in layered form through a nozzle into a coagulation bath so as to form a double layer membrane.