Abstract:
A method of sealing the open mouths of an array of test tubes comprises providing a plurality of plugs with upwardly facing recesses, and a flexible carrier sheet having the same array of mutually spaced downwardly projecting pegs inserted into and frictionally retained within the recesses of respective ones of the plugs. Sealing is effected by aligning the plugs with the open mouths of the test tubes, pressing the carrier sheet towards the test tubes to seat the plugs in the open tube mouths, and peeling the carrier sheet away from the test tubes to extract the pegs from the plug recesses while allowing the plugs to remain seated in the tube mouths.
Abstract:
A sealing mat for sealing the open mouths of an array of test tubes. The mat includes a flexible carrier sheet having an array of mutually spaced pegs projecting downwardly therefrom and a plurality of plugs. The plugs are externally configured and dimensioned to be inserted in and to seal the open mouths of the test tubes. Each of the plugs has an upwardly facing recess internally configured and dimensioned to receive and coact in frictional engagement with a respective one of the pegs to thereby releasably secure the plugs to the carrier sheet. The carrier sheet is separable from the thus inserted plugs by flexure to extract the pegs from the recesses.
Abstract:
A tissue or cell growth device is described for placement within a well of a cluster dish. The device has a cell or tissue retention element detachably attached to a hanger. The hanger preferably has openings allowing access to the well without removal of the member and is capable of positioning the cell or tissue retention element a preselected distance relative to the hanger. Also described are various embodiments of the device having differently shaped hangers and the combination of the device and a cluster dish.
Abstract:
Apparatus for growing tissue cultures in vitro, which permits a concentration gradient of nutrients to develop through a permeable membrane to which a sample of tissue is attached. The permeable membrane is attached to the bottom end of a tubular support that in turn hangs by a flange connected to its upper end on the top of a well containing the nutrients. Typically, the well is part of a tissue culture cluster dish. The flange of the support positions the support and membrane centrally in the well so as to avoid capillary action in the space between the well and support. The configuration of the support and its cooperation with the lid of the cluster dish also prevents the support and membrane from floating in the nutrient solution in the well. Openings in the support provide access for a pipette to add and withdraw fluid from the space between the well and membrane support and from the space below the membrane.
Abstract:
A tissue culture flask having a flat bottom wall with optical properties on the inner surface of which cells are grown. A top wall opposite the bottom wall has a large opening therethrough which provides access to the growing surface for the removal of cells growing on the surface. The opening is closed by a flexible transparent film which is sealed to the top wall and which may be peeled off the top wall to provide access to the flask interior.
Abstract:
A small volume laboratory filter having a thin rectangular body and coaxial inlet and outlet sleeves connected to opposite ends thereof. A very thin filter cavity is formed in the body and lies in a plane inclined slightly to the common axis of the inlet and outlet sleeves. The cavity is divided by a filter membrane into extremely thin chambers, one communicating with the inlet sleeve and the other with the outlet sleeve. A rigid package for the filter is sealed across one end by a flexible cover which when stripped from the package exposes the inlet sleeve so that it may be readily engaged by a syringe nipple or other fluid source without the user having to touch the filter. When the inlet sleeve is engaged, the filter may be withdrawn from the package.
Abstract:
A method of sealing the open mouths of an array of test tubes comprises providing a plurality of plugs with upwardly facing recesses, and a flexible carrier sheet having the same array of mutually spaced downwardly projecting pegs inserted into and frictionally retained within the recesses of respective ones of the plugs. Sealing is effected by aligning the plugs with the open mouths of the test tubes, pressing the carrier sheet towards the test tubes to seat the plugs in the open tube mouths, and peeling the carrier sheet away from the test tubes to extract the pegs from the plug recesses while allowing the plugs to remain seated in the tube mouths.
Abstract:
A tissue or cell growth device is described for placement within a well of a cluster dish. The device has a cell or tissue retention element detachably attached to a hanger. The hanger preferably has openings allowing access to the well without removal of the member and is capable of positioning the cell or tissue retention element a preselected distance relative to the hanger. Also described are various embodiments of the device having differently shaped hangers and the combination of the device and a cluster dish.
Abstract:
The present invention relates to an apparatus for growing tissue culture in vitro. The apparatus features a housing which fits into a well containing media. A bottom membrane surface is maintained at a depth within the well, and the housing centered in the well by a flange and rim which cooperate with the well.