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2009-12-23 13:23:00
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Aluminum The name aluminum is derived from the ancient name for alum (potassium aluminum sulphate), which was alumen (Latin, meaning bitter salt). Alu...
Date
2009-12-29 10:02:00
Description
What is ammonia? Ammonia is one of the most widely produced chemicals in the United States. In pure form, it is known as anhydrous ammonia. Ammonia is...
Date
2009-12-23 13:50:00
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Antimony Antimony si a semimetallic chemical element which can exist in two forms: the metallic form is bright, silvery, hard and brittle; the non met...
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2009-12-23 13:26:00
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Arsenic Arsenic appears in three allotropic forms: yellow, black and grey; the stable form is a silver-gray, brittle crystalline solid. It tarnishes r...
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2009-11-26 14:27:00
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What is arsenic? Arsenic is a semi-metal, a member of the nitrogen family. It occurs naturally in the earth and in the seas. It is odorless and tastel...
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2010-12-08 12:41:00
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The first organism able to substitute one of the six chemical elements crucial to life has been found. The bacterium, found in a California lake, use...
Date
2009-12-29 14:51:00
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Inadequate measures of water quality have been used in many studies of the health effects associated with water supplies in developing countries. The...
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2009-12-23 14:05:00
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Barium Barium is a silvery-white metal that can be found in the environment, where it exists naturally. It occurs combined with other chemicals, such ...
Date
2010-01-08 10:39:00
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A biofilm is a surface deposit of bacteria, other microorganisms, and organic and inorganic materials that accumulate within a slime layer. Biofilms c...
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2009-12-29 11:12:00
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BOD (biochemical oxygen demand) The amount of oxygen required by aerobic microorganisms to decompose the organic matter in a sample of water, such as...
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