activity coefficient

ac·tiv·i·ty (a),

(ak-tiv'i-tē), 1. electroencephalography The presence of neurogenic electrical energy.
See also: radioactivity. 2. physical chemistry an ideal concentration for which the law of mass action will apply perfectly; the ratio of the activity to the true concentration is the activity coefficient (γ), which becomes 1.00 at infinite dilution.
See also: radioactivity. 3. For enzymes, the amount of substrate consumed (or product formed) in a given time under given conditions; turnover number.
See also: radioactivity. 4. The number of nuclear transformations (disintegrations) in a given quantity of a material per unit time. Units: curie (Ci), millicurie (mCi), becquerel (Bq), megabecquerel (MBq).
See also: radioactivity.

Activity Coefficient

An idealised concentration of a solute at which the law of mass action acts in a “perfect” fashion, which can be used to determine the solute’s thermodynamic activity.

activity coefficient

1. A factor used in potentiometry to describe the activity of free ions in solution.2. A vitamin deficiency factor that describes the enhancement of enzyme activity after saturation with a vitamin.See also: coefficient

单词	activity coefficient
释义	DictionarySeeactivity activity coefficient activity coefficient [‚ak′tiv·əd·ē ‚kō·ə′fish·ənt] (physical chemistry) A characteristic of a quantity expressing the deviation of a solution from ideal thermodynamic behavior; often used in connection with electrolytes. activity coefficient ac·tiv·i·ty (a), (ak-tiv'i-tē), 1. electroencephalography The presence of neurogenic electrical energy. See also: radioactivity. 2. physical chemistry an ideal concentration for which the law of mass action will apply perfectly; the ratio of the activity to the true concentration is the activity coefficient (γ), which becomes 1.00 at infinite dilution. See also: radioactivity. 3. For enzymes, the amount of substrate consumed (or product formed) in a given time under given conditions; turnover number. See also: radioactivity. 4. The number of nuclear transformations (disintegrations) in a given quantity of a material per unit time. Units: curie (Ci), millicurie (mCi), becquerel (Bq), megabecquerel (MBq). See also: radioactivity. Activity Coefficient An idealised concentration of a solute at which the law of mass action acts in a “perfect” fashion, which can be used to determine the solute’s thermodynamic activity. activity coefficient 1. A factor used in potentiometry to describe the activity of free ions in solution.2. A vitamin deficiency factor that describes the enhancement of enzyme activity after saturation with a vitamin.See also: coefficient
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