Abstract: A pierceable cap may be used for containing sample specimens. The pierceable cap may prevent escape of sample specimens before transfer with a transfer device. The pierceable cap may fit over a vessel. An access port in the shell of the pierceable cap may allow passage of a transfer device through the pierceable cap. The shell receives a septum that has four half dome indentations, each indentation defining a quadrant of the septum interior. The indentations are separated by the septum floor which extends along respective first and second diameters of the septum and intersect at approximately ninety degrees. The half dome indentations guide a transfer device to the partially slitted portion of the septum floor.

Abstract: The present invention provides a device for assaying living cells comprising a substrate, wherein the substrate comprises one or more tethering molecules which adhere to the substrate and are capable of interacting with cell membranes of the cells, wherein the cells maintain a free-floating, non-adherent character when bound to the one or more tethering molecules.

Abstract: The present invention provides a device for assaying living cells comprising a substrate, wherein the substrate comprises one or more tethering molecules which adhere to the substrate and are capable of interacting with cell membranes of the cells, wherein the cells maintain a free-floating, non-adherent character when bound to the one or more tethering molecules.