This experiment's results specifically used the word "subunit" to avoid contradicting Paul Doty’s work in salmon sperm. Initial attempts to incorporate 5-bromouracil failed during this experiment, which came eighteen months after Taylor, Woods, and Hughes did a similar study in (-5[1])fava beans using tritiated thymidine. This experiment used Jerome Vinograd's cesium chloride gradients for ultracentrifugation. (10[1])In this so-called "most beautiful experiment in biology," two bands (-5[1])appeared after two generations, disproving Max Delbrück’s dispersive model. In this experiment, (10[1])E. coli were grown for several generations on media containing nitrogen-15, (-5[1])before being transferred to nitrogen-14 media. For 10 points, name this experiment which showed that DNA replication is semi-conservative. ■END■ (10[1]0[2])