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
Praziquantel was the result of collaborative work between two German pharmaceutical manufacturers: Bayer A.G., Leverkusen, and E. Merck, Darmstadt. The anthelminthic activity of pyrazinoisoquinoline derivatives was discovered in 1972 in the laboratories of Bayer, and was followed up by J. Seubert and others at E. Merck (Andrews, 1981; Seubert et al., 1977a).