Abstract: A core assembly apparatus includes a rotating table having a plurality of operation positions. A plurality of fixtures for assembling cores are carried by the rotating table adjacent its periphery, preferably one core assembly fixture for each operation position. The core assembly fixtures are inclined toward the central portion of the rotating table. In one of the operation positions, a completed core assembly is transferred from a core assembly fixture to a horizontal conveyor. A pick-and-place assembly engages a core assembly and removes it from an inclined core assembly fixture of a rotating table and placement on a horizontal conveyor. Alternatively, the fixtures may be pivotally attached to the rotating table and include core assembly gripping mechanisms so that the core assembly fixtures can pivot to lower assembled cores onto a horizontal conveyor.

Abstract: A flow cytometer includes a temperature regulator that maintains the temperature of the piezoelectric actuator sufficiently constant so as to produce a consistent predetermined oscillation frequency, and corresponding consistent predetermined droplet break-off point.

Abstract: A flow cytometer includes a temperature regulator that maintains the temperature of the piezoelectric actuator sufficiently constant so as to produce a consistent predetermined oscillation frequency, and corresponding consistent predetermined droplet break-off point.