| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| soot |
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| black or dull brown deposit of fine powder resulting from incomplete combustion of fuel of high carbon content, e.g., coal, wood, and oil. It consists chiefly of amorphous carbon and tarry substances that cause it to adhere to surfaces. Soot obtained from coal also contains sulfur and ammonia. See carbon black. |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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