摘要:
A method is provided for measuring a state variable of a biological cell (3) located in a nutrient medium (2) and supported on and adhering to a support area (5). Within the support area (5) for the cell (3) and at a distance from the support area edge, an opening is made in the membrane of the cell (3). The edge of the cell membrane that surrounds the opening and adheres to the support area (5) seals off the liquid found inside the cell (3) from the nutrient medium (2). Through the opening the state variable (2) is measured. An apparatus for performing the method is also provided.
摘要:
A method is provided for measuring a state variable of a biological cell (3) located in a nutrient medium (2) and supported on and adhering to a support area (5). Within the support area (5) for the cell (3) and at a distance from the support area edge, an opening is made in the membrane of the cell (3). The edge of the cell membrane that surrounds the opening and adheres to the support area (5) seals off the liquid found inside the cell (3) from the nutrient medium (2). Through the opening the state variable (2) is measured. An apparatus for performing the method is also provided.
摘要:
A process is provided for the intracellular manipulation of a biological cell (3) which is positioned adhering to a support area (5) in a culture medium (2). Inside the support area (5) for the cell (3) an opening into the membrane of the cell (3) is created spaced from its support edge. The edge of the cell membrane surrounding the opening, adhering to the support area (5), thus seals off the cell fluid situated in the interior of the cell (3) from the culture medium (2) and insulates the cell fluid against the culture medium (2). The interior of the cell (3) is manipulated through the opening. An apparatus for implementing the process is also provided, including an object carrier (4) with a support area (5) for adhering the cell and a poration tool (6) for creating the opening in the cell membrane. The poration tool (6) may be any of various chemical, mechanical and/or electrical devices.
摘要:
A process is provided for the intracellular manipulation of a biological cell (3) which is positioned adhering to a support area (5) in a culture medium (2). Inside the support area (5) for the cell (3) an opening into the membrane of the cell (3) is created spaced from its support edge. The edge of the cell membrane surrounding the opening, adhering to the support area (5), thus seals off the cell fluid situated in the interior of the cell (3) from the culture medium (2) and insulates the cell fluid against the culture medium (2). The interior of the cell (3) is manipulated through the opening. An apparatus for implementing the process is also provided, including an object carrier (4) with a support area (5) for adhering the cell and a poration tool (6) for creating the opening in the cell membrane. The poration tool (6) may be any of various chemical, mechanical and/or electrical devices.
摘要:
A device (1) for the carrying out of investigations on cell cultures (2) which take place in a liquid culture medium (4). The device possesses at least a receptacle (3) to contain the culture medium (4) including the cell culture (2), wherein one or more sensors (6) for measurement of the cell culture activities is provided and wherein the receptacle (3) has at least an opening for the adding and the removal of liquid culture medium (4) and the like. A separating element (7) can be introduced into the open upper part of the receptacle (3) and can be brought within the said receptacle (3) in a position close to the bottom (5), in which the said separating element (7) makes a boundary forming a partial space (8) which has a small volume in relation to the entire volume of the receptacle (3). Further, a flow channel (9) is provided, which first, communicates with the small volume partial space (8), and second, communicates with the said reservoir (14). This flow channel (9) and/or the sensors (6) are placed in the area of the small volume partial space (8). By means of the capability for adjustment of the separating element (7) as to its distance from the bottom of the receptacle (3), in the neighborhood of the cell culture (2) a microreaction volume exactly fitting the current requirements can be adjusted. By means of the flow channel (9), the cell culture (2) in the small volume partial space (8) stands in fluid communication with that in the reservoir. For the regeneration of the cell culture solution in the small volume partial space, the separating element (7) can be elevated and depressed, or it is possible, to inject into the small volume partial space of the receptacle (3) a quantity of liquid and by means of a through-flow channel. In this case, a convective mixing of fresh and spent medium takes place through the flow channel (9) between the small volume partial space and the reservoir (14).
摘要:
A device for investigating activities of cell cultures in a liquid culture medium includes a receptacle for the culture medium, and one or more sensors for measurement of cell culture activities. An opening for adding and removing liquid culture medium is provided. A separating element can be placed close to the receptacle bottom, forming a partial space with a small volume relative to the entire volume. A flow channel that communicates with the small volume and the reservoir and/or the sensors are placed in the small volume partial space. By adjustment of the separating element distance from the receptacle bottom, a microreaction volume exactly fitting the current requirements is obtained. For regeneration of the cell culture solution in the small volume partial space, the separating element can be elevated and depressed, or liquid can be injected into the small volume by the through-flow channel, providing convective mixing of fresh and spent medium.
摘要:
The invention relates to a device for measuring living cells or similar biocomponents comprising a field effect transistor which is provided with a source, a drain and a channel area placed on a substrate. Said channel area connects said source and drain and is provided with a gate-electrode mounted thereon. The gate electrode has at least two laterally disposed parallel electrode areas which are perpendicular to a direction in which the channel area connects the source to the drain in such a way that they are distant and electrically insulated from each other.
摘要:
The invention relates to a device for measuring living cells or similar biocomponents comprising a field effect transistor which is provided with a source, a drain and a channel area placed on a substrate. Said channel area connects said source and drain and is provided with a gate-electrode mounted thereon. The gate electrode has at least two laterally disposed parallel electrode areas which are perpendicular to a direction in which the channel area connects the source to the drain in such a way that they are distant and electrically insulated from each other.
摘要:
An electric component comprising a sensor and/or actuator chip with a substrate on which a passivating layer and a sensor and/or actuator structure consisting of an active surface area is arranged. The chip is surrounded by an encapsulation having an opening which forms an access to the at least one active surface area. A layer stack is arranged on the substrate, said stack of layers comprising from the passivating layer to the substrate at least one first strip conductor layer, a first electric insulating layer, a second strip conductor layer and a second electric insulating layer. The first conductor strip layer is fully arranged outside the area of the chip covered by the opening. At least one conductor strip of the second conductor strip layer is connected to the sensor and/or actuator structure.
摘要:
In a method for producing a sensor arrangement and the resulting sensor arrangement, a sensor is provided on or in a chip and the chip is covered with a protective cover, the cover being an interface between the sensor and the environment. An adhesive layer is provided between the chip and the protective cover, the adhesive layer alone or together with the protective cover being an interface between the sensor and the environment. The protective cover and/or the adhesive layer may have a channel formed therein, the channel functioning as the reception channel for a sensor. In an alternative embodiment, the protective cover placed on a wafer with several chips, and the wafer is cut up to produce the individual chips with the protective cover. Thus, a sensor arrangement may have the protective cover applied to the individual chip after the chip is cut from the wafer, or the protective cover may be applied to the wafer, and the wafer and cover are then cut up into the individual chips and corresponding covers. The channel leading from one side of the arrangement to the sensor may be taken through the adhesive layer, through the protective cover, or through both. A hole may be formed in the protective cover above the sensor, with the sensor lying loosely in the hole. The reaction volume may be determined by the dimensions of the hole.