MARY PREVITEâS SPEECH AT THE SIXTIETH ANNIVERSARY CELEBRATION OF THE LIBERATION OF THE WEIHSIEN CONCENTRATION CAMP. August 17, 2005 Weifang, Shandong Province, China. Honorable Mayor Zhang Xinqi, honorable friends of Weifang, you have earned our deepest gratitude by inviting us here to celebrate this Day of Liberation.
TIL that in 1669, Hennig Brand discovered phosphorus by boiling down urine and heating the residue to very high temperatures. He was trying to make gold though, and he hoped that the yellow color of urine meant there was gold in it. (chemicool.com) submitted 4 years ago by virnovus 8. 89 comments; share; save
Thus, this injected substance is the genetic material of the phage. Hershey and Chase designed a very simple experiment to determine which molecule, DNA or protein, acted as the genetic material in phages. To do this, they made use of a technique called radioactive labeling.hus Hershey and Chase concluded that it is DNA, and not protein, that is injected into the bacteria during phage infection and this DNA must be the genetic material that reprograms the bacteria. Comprehension Checkpoint. Hershey and Chase used radioactive phosphorus in their experiment because.