摘要:
A culture vessel (100), which is designed for culturing biological cells (1) in hanging drops (2), comprises a vessel wall (10), which has a cover portion (11) and a floor portion (12), wherein the cover portion (11) is designed to provide a culturing surface (13), and the floor portion (12) is designed to receive a liquid (3), the vessel wall (10) encloses an interior (20) of the culture vessel on all sides, the culturing surface (13) has holding elements (14), which are designed to position the drops (2), wherein the culturing surface (13) can receive the drops (2) hanging freely in the interior (20), and the vessel wall (10) is movable such that the holding elements (14) can be wetted with the liquid (3) from the floor portion (12). A method for culturing biological cells (1) in hanging drops (2) in the culture vessel (100) is also described.
摘要:
The invention relates to a method for producing three-dimensional, preferably porous, hydrogel structures (1) by means of layer build-up technique, wherein the method comprises the following steps. Providing (S1) of a liquid hydrogel solution, preferably a liquid alginate solution, and a, preferably transportable, sample carrier. Layerwise applying (S2) the liquid hydrogel solution onto the sample carrier (4) in a temperature environment, the temperature of which is below the freezing point of the hydrogel solution, to produce a frozen 3D layered hydrogel structure (1a). In order to increase advantageously the porosity of the 3D layered hydrogel structure (1a), i.e. the proportion of small voids, cavities and/or depressions in the 3D layered hydrogel structure, the method according to the invention further comprises the step of drying (S3) of the frozen 3D layered hydrogel structure (1a), e.g. by means of freeze-drying, to produce a porous 3D hydrogel structure (1). The invention relates further also to a device (10) for the layerwise building-up of three-dimensional hydrogel structures.
摘要:
The invention relates to a substrate unit (100), in particular for the cryopreservation of a biological sample (1) containing biological cells (2, 2.1, 2.2), comprising a substrate platform (10) having a front side and a back side, wherein the front side of the substrate platform (10) has a cultivation surface (11) for receiving the biological sample (1), a first chamber (20), which comprises the cultivation surface (11) of the substrate platform (10), wherein the first chamber (20) is configured for receiving a cultivation liquid (3), a second chamber (30), which is configured for receiving a temperature control medium (5), and a chamber bracket (50) for receiving the substrate unit (100) in a cryopreservation device in a pivotable manner, wherein the first chamber (20) and the second chamber (30) are connected to each other in an adjacent manner, and the substrate platform (10) forms a separating wall between the first chamber (20) and the second chamber (30), and wherein the back side of the substrate platform (10) faces the second chamber (30). The invention further relates to a cryopreservation device (200), in which the substrate unit (100) is arranged in rotatable manner, and a method for the cryopreservation of a biological sample (1).