A composition comprising a dye fixing agent, a N-heterocyclic polymer, and a nonionic surfactant is described which provides improved fabric color care upon laundry treatment. Each cantilever array block includes a set of cantilevers, with each cantilever including a set of cantilever fingers surrounded by a frame with frame fingers. The invention further provides a method of screening a substance for the ability of the substance to modify human platelet F11 receptor function, and a method for isolating other human platelet F11 receptor molecules. The tapering layer and the buffer oxide layer are etched back so that the tapering layer is remained only at the upper end portion of the etched hole. The device includes a microphone that senses an audio signal generated by the medical device when the medical device alarms.