In general, stainless steel crowns are used for children's teeth because they don't require multiple dental visits to put in place and so are more cost- effective than custom-made crowns and prophylactic dental care needed to protect a tooth without a crown.
Phosphorus comes from many places. You might think that the biggest sources of phosphorus are the obvious onesâsewage treatment plants, chemical factories, and the like. But in fact, identifiable sources such as these contribute less than 20% of the phosphorus in the river.
Potassium comes from potassiumsulfate (K 2 SO 4) or potassium chloride (KCl), which is also called muriate of potash.The phosphorus content of a fertilizer is specified as the amount of P 2 O 5 because this is the anhydrousform of phosphoric acid.roteins contain the element nitrogen in addition to carbon, oxygen, and hydrogen.Some proteins contain sulfur as well. Plants also contain DNA, which carries the genetic information that controlshow a plant grows. DNA contains the element phosphorus, in addition to nitrogen, carbon, oxygen, and hydrogen.