reduction+to+powder
31zinc processing — Introduction preparation of the ore for use in various products. Zinc (Zn) is a metallic element of hexagonal close packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. It has only moderate hardness and can …
32Iron — Fe redirects here. For other uses, see Fe (disambiguation). This article is about the chemical element. For other uses, see Iron (disambiguation). manganese …
33War on Drugs — For other uses, see War on Drugs (disambiguation). As part of the War on Drugs , the U.S. gives hundreds of millions of dollars per year of military aid to Colombia, which is used to combat leftist guerrilla groups such as FARC, who have been… …
34Silicon nitride — Preferred IUPAC name Silicon nitride …
35Heroin — Not to be confused with heroine. For other uses, see Heroin (disambiguation). Heroin …
36DuPont — This article is about E.I. du Pont de Nemours and Company. For other uses, see Dupont (disambiguation). E. I. du Pont de Nemours and Company Type Public Traded as NYSE:  …
37printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… …
38iron processing — Introduction use of a smelting process to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of iron and of its preparation for smelting. Iron (Fe) is a… …
39Drug injection — Shoot up redirects here. For shooting video game genre, see Shoot em up. This article is not about medical practice. For medical practices, see Intramuscular injection or Intravenous therapy. A piece of a hypodermic needle, as seen on X ray, in… …
40Agriculture and Food Supplies — ▪ 2007 Introduction Bird flu reached Europe and Africa, and concerns over BSE continued to disrupt trade in beef. An international vault for seeds was under construction on an Arctic island. Stocks of important food fish species were reported… …
