The Analysis and Configuration of a Control System for a Mars Propulsive Lander

Analysis and configuration of control system for Mars propulsive lande

Circuit exhibits power efficiency greater than 75 percent

Variable duty cycle pulser increases circuit power efficiency by more than 75 percent when operating solenoid valves. The pulser provides a low-level holding current after a high-level current has actuated the solenoid valves

Isolation of Temperature-Sensitive Mutants of L-Cells

Procedures are described for the isolation of conditional lethal mutants of mouse L-60T cells. The mutant lines were temperature sensitive by the following criteria: (a) colony-forming ability, (b) growth in suspension culture, and (c) rate of uptake of tritiated-thymidine