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.
In the morning, Christopher Colon, 21, of the South End, was freed on $500 bail in a decision praised by Conley as a model of how such cases should be handled. Colon, listed as Carlos Colon in the court docket, had been convicted in March 2011 of distribution of a Class B substance. That class inclu