Compounds and Elements

The Columbia Encyclopedia, 6th ed. A Dictionary of Food and Nutrition Further reading

anhydride

The Columbia Encyclopedia, 6th ed. | 2008 | Copyright

anhydride [Gr.,=without water], chemical compound formed by removing water, H ₂ O, from another compound; the anhydride can also react with water to form the original compound. An acid anhydride reacts with water to form an acid; e.g., sulfur trioxide, SO ₃ , reacts with water to form sulfuric acid, H ₂ SO ₄ . A basic anhydride reacts with water to form a base; e.g., calcium oxide, CaO, reacts with water to form calcium hydroxide, Ca(OH) ₂ . Anhydrides of organic acids have many uses. They react with alcohols to form esters; e.g., acetic anhydride, (CH ₃ CO) ₂ O, reacts with ethanol, C ₂ H ₅ OH, to form ethyl acetate, CH ₃ COOC ₂ H ₅ , a useful solvent. They also react with ammonia and primary or secondary amines to form amides. Other important acid anhydrides include maleic anhydride and phthalic anhydride.

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creatinine

A Dictionary of Food and Nutrition | 2005 | | Copyright

creatinine Formed non‐enzymically from creatine (chemically the anhydride of creatine). Urinary excretion of creatinine is relatively constant from day to day, and reflects mainly the amount of muscle tissue in the body. Therefore the amounts of various components of urine are often expressed relative to creatinine.

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DAVID A. BENDER. "creatinine." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>.

DAVID A. BENDER. "creatinine." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O39-creatinine.html

DAVID A. BENDER. "creatinine." A Dictionary of Food and Nutrition. 2005. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-creatinine.html

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Free newspaper and magazine articles

	Maleic Anhydride.(production in China)(Brief Article)(Statistical Data Included) Magazine article from: China Chemical Reporter; 10/26/2001
	Maleic anhydride production in China.(Organic) Magazine article from: China Chemical Reporter; 12/21/2010
	Phthalic anhydride market in 2010: raw material supply shortage, brisk... Magazine article from: China Chemical Reporter; 6/21/2010