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:
Methods and compositions are described herein for reconstruction of different functional tissues. Dissociated cells, differentiated cells, adult mesenchymal stem cells or embryonic stem cells are seeded on a scaffold. The scaffold will consist of a biocompatible, biodegradable shape memory (“SM”) polymers. In addition bioactive substances may be incorporated in the scaffold. Thermoplastic as well as thermoset materials with SM-effect can be used. The shape memory effect will be applied as an interactive link between the cells and the used polymeric scaffold. The degradation kinetics as well as shape memory transition temperature will be tailored by adjusting to monomer ratios of the co-oligomers. The shape memory effect will be used to create a degradation or release of bioactive substances on demand, induce forces on seeded cells or induce proliferation and differentiation of cells.
摘要:
Disclosed is a method for achieving a recallable hair deformation. A composition is applied onto hair, comprising at least one active agent, which, alone or in combination with further compounds, is able, after application to the hair and after carrying out the treatment of hair in accordance with the present invention, to provide a shape memory effect. The hair is brought into a defined (permanent) shape and the permanent shape is subsequently fixed by means of inducing a chemical or physical change of the applied agents, wherein after a desired or undesired deformation, the memory shape of the initial memory shape may be recovered by means of a physical stimulation. Suitable active agents are for example macromers which may be cross-linked to provide shape memory polymers, wherein the permanent shape is fixed by means of the chemical cross-linking of the macromer, providing a shape memory polymer, which possesses at least one transition temperature Ttrans. Suitable active agents are also shape memory polymers, which have hard segments which may be cross-linked by physical interactions having a first transition temperature T′trans, which preferably is at least 10° C. above room temperature, and soft segments having a second transition temperature which preferably is at least 10° C. below T′trans. In addition to the permanent hairdo, a second (temporary) shape can be impressed. Furthermore, disclosed is a method for the recovery of a once programmed permanent hairdo, which has been brought into a temporary shape or which has been deformed in any other way.
摘要:
The invention relates to an article (10) made of a shape memory composite material (12) comprising a shape memory polymer (14) and a magnetic material (16) embedded therein, said shape memory polymer (14) after thermomechanical programming being capable of undergoing at least one temperature-induced transition from a temporary shape into a permanent shape, as well as to a method for the production thereof and a method for retrieving stored shapes.It is envisaged that the article (10) has at least two directly or indirectly interconnected sections (18, 20) which differ by a different surface-to-volume ratio (S/V).
摘要:
The invention relates to a method for programming a shape memory polymer, which comprises at least one switching segment having at least one thermal phase transition and covalent and/or non-covalent cross-linking points such that the shape memory polymer after the programming thereof is in a position to transition from a programmed temporary shape into the permanent shape thereof, following a temperature increase to a temperature that at least corresponds to a switching temperature (Tswitch, Tσmax). According to the invention, the method comprises (a) predetermining a programming temperature (tprog) as a function of a desired switching temperature (Tswitch, Tσmax), (b) heating the shape memory polymer to the predetermined programming temperature (tprog), and transferring the polymer into a shape that corresponds to the temporary shape by applying a forced molding state, and (c) cooling the polymer to a temperature below the desired switching temperature (Tswitch, Tσmax) while maintaining the forced molding state.
摘要:
A method for achieving a retrievable hair restyling is described. Here a composition is applied to the hair, said composition containing at least one first active ingredient or active ingredient complex which can provide a shape memory effect by itself or in combination with other substances after being applied to the hair and after the performance of the treatment of the hair according to the invention. The composition additionally contains at least one second active ingredient, namely a hydrophobic substance with a water solubility of ≦5 percent by weight at 20° C. The hair is arranged into a given (permanent) shape and said permanent shape is then fixed by inducing a chemical or physical modification of the applied active ingredients, wherein after a wanted or unwanted deformation of the shape memory, the original shape memory can be restored by means of a physical stimulation. In addition to the permanent hairstyle, a second (temporary) shape can be impressed. A method is also described for restoring a previously programmed permanent hairstyle that was temporarily transformed into a temporary shape or that was otherwise deformed.
摘要:
A cosmetic composition is described, said composition having a content of a block polymer having at least a first block, which block is a polyol selected from polyethers, dimerdiol, derivatives derived from dimerdiol and polyesters of dicarboxylic acids with diols and at least two additional blocks, which blocks are polyesters of hydroxycarboxylic acids or lactones thereof.
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:
A method for restoring a programmed article which contains a shape memory composite material of at least one shape memory polymer network with thermally inducible triple shape properties, the method comprising subjecting the article to a magnetic alternating field and simultaneously to an external heat supply in order to trigger the restoration, wherein at least one of the parameters of magnetic field strength (H) and ambient temperature (TUmg) is increased continuously or discontinuously in such a way that the article first experiences a transition in shape from the first temporary shape (TF1) into the second temporary shape (TF2) and subsequently from the second temporary shape (TF2) into the permanent shape (PF).
摘要:
The invention relates to a method for restoring a programmed article which contains, at least over portions, a shape memory composite material, said composite material comprising (i) at least one shape memory polymer network with thermally inducible triple shape properties which comprises at least one first phase-separated switching segment with a first transition temperature (Ttrans,1) and a second phase-separated switching segment with a second transition temperature (Ttrans,2, where Ttrans,1