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concentration
concentration
The Oxford Pocket Dictionary of Current English
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2009
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© The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information)
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con·cen·tra·tion
/ ˌkänsənˈtrāshən/
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n.
1.
the action or power of focusing one's attention or mental effort.
∎ (concentration on/upon)
dealing with one particular thing above all others:
concentration on the needs of the young can mean that the elderly are forgotten.
2.
a close gathering of people or things:
the largest concentration of Canada geese on earth.
∎
the action of gathering together closely:
the concentration of power .
3.
the relative amount of a given substance contained within a solution or in a particular volume of space; the amount of solute per unit volume of solution:
the gas can collect in dangerous concentrations.
∎
the action of strengthening a solution by the removal of water or other diluting agent or by the selective accumulation of atoms or molecules.
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Concentration Gradient
Book article from: Chemistry: Foundations and Applications
Concentration Gradient A concentration gradient occurs where the concentration of something changes over a certain distance. For example, a few drops of food dye in a glass of water diffuse along the concentration gradient, from where the dye...
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Concentration Camps
Encyclopedia entry from: International Encyclopedia of the Social Sciences
Concentration Camps The concentration camp has become a paradigmatic symbol for oppression of the...x201C; other. ” The Oxford Dictionary defines a concentration camp as “ a camp where non-combatants of a district...
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concentration camps
Book article from: The Oxford Companion to World War II
concentration camps See also GUlag ; see Map 31 for sites of principal concentration camps. Concentration camps were one of the most important instruments of terror in Nazi Germany. Forecast by Hitler as early as 1921, they were first employed...
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concentration
Book article from: The Columbia Encyclopedia, Sixth Edition
...equilibrium ). Concentration may be expressed...statement of the concentrations of the components...percentages. Very low concentrations may be expressed...of expressing concentration, several others...molecules, their concentrations cannot be expressed...Instead, the concentration ...
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Concentration
Encyclopedia entry from: The Gale Encyclopedia of Science
...accurate. For example, the concentration of nitrogen in the atmosphere...molarity is a useful unit of concentration. It is the number of moles...Other useful units of concentrations are molality, or the number...of dissolved solids. The concentration of a radioactive gas such...
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