Infection, Blending and Centrifugation are the three steps followed in the experiments conducted by the following

Hershey and Chase while working with Bacteriophages to demonstrate that DNA is the genetic material in Bacteriophages, used radioactive isotopes of phosphorus and Sulphur and the steps during the experiments as Infection (infecting E.coli with bacteriophages), Blending to detach the ghosts from bacteria and centrifugation to separate the virus protein coats and bacteria.