platinum-cobalt scale

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• Platinum — This article is about the chemical element. For other uses, see Platinum (disambiguation). iridium ← platinum → gold Pd ↑ Pt ↓ Ds …   Wikipedia

• Pt/Co scale — The Platinum Cobalt Scale (Pt/Co scale or Apha Hazen Scale ) is a color scale that was introduced in 1892 by chemist A. Hazen. The index was developed as a way to evaluate pollution levels in waste water. It has since expanded to a common method… …   Wikipedia

• Cobalt — This article is about the metal. For other uses, see Cobalt (disambiguation). iron ← cobalt → nickel ↑ Co ↓ Rh …   Wikipedia

• Mohs scale of mineral hardness — The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and… …   Wikipedia

• Color of water — For the book by James McBride, see The Color of Water. Water portal …   Wikipedia

• Photonic metamaterial — Electromagnetism Electricity · …   Wikipedia

• Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

• pottery — /pot euh ree/, n., pl. potteries. 1. ceramic ware, esp. earthenware and stoneware. 2. the art or business of a potter; ceramics. 3. a place where earthen pots or vessels are made. [1475 85; POTTER1 + Y3] * * * I One of the oldest and most… …   Universalium

• Mineral industry of Africa — The mineral industry of Africa is one of the largest mineral industries in the world. Africa is the second biggest continent, with 30 million km² of land, which implies large quantities of resources. For many African countries, mineral… …   Wikipedia

• Involvement of the People's Republic of China in Africa — This article is primarily about economic relations between the PRC and Africa. For a more general overview, see Sino African relations. The People s Republic of China and Africa Chinese involvement in Africa, which began centuries ago, continues… …   Wikipedia

• Nickel — This article is about the chemical element. For other uses, see Nickel (disambiguation). cobalt ← nickel → copper ↑ Ni ↓ Pd …   Wikipedia