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activation energy
activation energy in chemistry, minimum energy needed to cause a chemical reaction . A chemical reaction between two substances occurs only when an atom, ion, or molecule of one collides with an atom, ion, or molecule of the other. Only a fraction of the total collisions result in a reaction, be...
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Appleton
Appleton city (1990 pop. 65,695), seat of Outagamie co., E Wis., on the Fox River near its exit from the northern end of Lake Winnebago, in a dairying and stockraising region; inc. 1857. Waterfalls provide power for the city's industries, which produce paper, wood, metal, concrete, and dairy produc...
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Sir Nigel Playfair
Sir Nigel Playfair , 1874-1934, English actor-manager. He made his acting debut in 1902 and later appeared in major London productions of Shaw and Shakespeare. He took on the management of the Lyric Theatre from 1919 to 1932. There Playfair's greatest achievements were his revival (1920) of John Gay...
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fermentation
fermentation process by which the living cell is able to obtain energy through the breakdown of glucose and other simple sugar molecules without requiring oxygen. Fermentation is achieved by somewhat different chemical sequences in different species of organisms. Two closely related paths of ferm...
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New Orleans
New Orleans , city (2006 pop. 187,525), coextensive with Orleans parish, SE La., between the Mississippi River and Lake Pontchartrain, 107 mi (172 km) by water from the river mouth; founded 1718 by the sieur de Bienville , inc. 1805. It was built within a great bend of the Mississippi (and is there...
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tritium
tritium , radioactive isotope of hydrogen with mass number 3. The tritium nucleus, called a triton, contains one proton and two neutrons. It has a half-life of 12.5 years and decays by beta-particle emission. The symbol is T or 3 H. It is one form of heavy hydrogen, the other being deuterium. It ...
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adenosine monophosphate
adenosine monophosphate (AMP) , organic compound composed of an adenine base, the sugar ribose , and one phosphate unit. AMP is one of the possible products of the hydrolysis of adenosine triphosphate (ATP) and is therefore important in the transfer of chemical energy during anabolism. Cyclic...
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metabolite
metabolite organic compound that is a starting material in, an intermediate in, or an end product of metabolism . Starting materials are substances, usually small and of simple structure, absorbed by the organism as food. These include the vitamins and essential amino acids. They can be used to co...
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syndicalism
syndicalism , political and economic doctrine that advocates control of the means and processes of production by organized bodies of workers. Like anarchists, syndicalists believe that any form of state is an instrument of oppression and that the state should be abolished. Viewing the trade union as...
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tempering
tempering process involving slow and moderate heating to increase the hardness and toughness of metals that have undergone previous heat treatment. Metals are usually hardened (see hardening ) by being heated to high temperatures and quenched rapidly. This treatment causes brittleness, which is re...
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