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
Phosphorus is a component of DNA, RNA, ATP, and also the phospholipids that form all cell membranes. It is, thus, an essential element for all living cells. The most important commercial use of phosphorus-based chemicals is the production of fertilizers.Phosphorus compounds are also widely used in explosives, nerve agents, friction matches, fireworks, pesticides, toothpaste, and detergents.he most important commercial use of phosphorus-based chemicals is the production of fertilizers. Phosphorus compounds are also widely used in explosives, nerve agents, friction matches, fireworks, pesticides, toothpaste, and detergents.