Activity

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Found on http://en.wikipedia.org/wiki/Activity_(disambiguation)

Activity

In effect means:- 'how much Radioactive material' - in terms of rate of transformations where 1 Becquerel (Bq) =1 transformation per second.
Found on http://www.ionactive.co.uk/glossary.html

activity

[n] - (chemistry) the capacity of a substance to take part in a chemical reaction 2. [n] - any specific activity
Found on http://www.webdictionary.co.uk/definition.php?query=activity

Activity

Attribute of an amount of a radionuclide. It is used to describe the rate at which transformations occur in it. Unit: becquerel, symbol: Bq. 1 Bq = 1 transformation per second.
Found on http://www.encyclo.co.uk/local/20474

Activity

The activity of a sample of radioactive material is the number of disintegrations per second taking place in that particular sample. The SI unit of activity is the becquerel (Bq)
Found on http://www.users.zetnet.co.uk/computing/MainPage/SecDepts/Physics/Resources

Activity

The rate at which a collection of radioactive nuclei decay. One curie corresponds to 3.7x1010 decays per second. See also: Curie, Radioactive Decay.
Found on http://www.diracdelta.co.uk/science/source/a/c/activity/source.html

Activity

The number of disintegrations per unit time inside a radioactive source. Expressed in becquerels
Found on http://www.encyclo.co.uk/local/20725

activity

(a) An effective concentration used in thermodynamic calculations in place of the actual concentration to allow equations developed for ideal solutions to be used to treat real solutions.
Found on http://antoine.frostburg.edu/chem/senese/101/glossary/a.shtml

activity

Activity (a) is a thermodynamic function used in place of concentration in equilibrium constants for reactions involving nonideal gases and solutions. For the species i activity is defined as a = f × c where ai is the activity of the species i, ci is its molar concentration, and fi is a dimensionless quantity called the activity coefficient.
Found on http://www.ktf-split.hr/periodni/en/abc/a.html

activity

A measure of the chemical potential of a substance, where chemical potential is not equal to concentration, that allows mathematical relations equivalent to those for ideal systems to be used to correlate changes in an experimentally measured quantity with changes in chemical potential.
Found on http://www.encyclo.co.uk/local/20742

Activity

Ac·tiv'i·ty noun ; plural Activities [ Confer French activité , Late Latin activitas .] The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities . 'The activity
Found on http://www.encyclo.co.uk/webster/A/24

activity

1. The state of being active, the ability to produce some effect, the extent of some function or action. ... 2. <chemistry> A thermodynamic quantity that represents the effective concentration of a solute in a nonideal solution, if concentrations are replaced by activities, the equations for equilibrium constants, electrode potentials, osmoti
Found on http://www.mondofacto.com/facts/dictionary?activity

activity

noun any specific behavior; `they avoided all recreational activity`
Found on http://wordnetweb.princeton.edu/perl/webwn?s=activity

activity

(ak-tiv´ĭ-te) the quality or process of exerting energy or of accomplishing an effect. a thermodynamic quantity that represents the effective concentration of a solute in a non-ideal solution. Symbol a. the number of disintegrations per unit of a radioactive material. Symbol A. t...
Found on http://www.encyclo.co.uk/local/21001

Activity

• (n.) The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.
Found on http://thinkexist.com/dictionary/meaning/activity/

activity

(from the article `liquid`) ...concentration of a substance may not be an accurate measure of its effectiveness, because of physical and chemical interactions, in which case an ...
Found on http://www.britannica.com/eb/a-z/a/14

activity

in radioactive-decay processes, the number of disintegrations per second, or the number of unstable atomic nuclei that decay per second in a given ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/a/14

activity

1. the state of being active; the ability to produce some effect; the extent of some function or action. 2. a thermodynamic quantity that represents the effective concentration of a solute in a nonideal solution; if concentrations are replaced by activities, the equations for equilibrium constants, electrode potentials, osmotic pressure, boiling p.
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio02.html

activity

activity 1. The state of being active. 2. Energetic action or movement; liveliness. 3. A specified pursuit in which a person partakes; such as, an educational process or procedure intended to stimulate learning through actual experience. 4. The intensity of a radioactive source. 5. The ability to take part in a chemical reaction. 6. A physiolo
Found on http://www.wordinfo.info/words/index/info/view_unit/52/

activity

  1. the state of being active
  2. an organic process that takes place in the body
  3. (chemistry) the capacity of a substance to take part in a chemical reaction
  4. a process existing in or produced by nature (rather than by the intent of human beings)
  5. radiation resulting from radioactive decay
  6. the trait of being active; moving or acting ra
    Found on

    activity

    A measure of the chemical potential of a substance, where chemical potential is not equal to concentration, that allows mathematical relations equivalent to those for ideal systems to be used to correlate changes in an experimentally measured quantity with changes in chemical potential
    Found on http://www.encyclo.co.uk/local/21115

    activity

    quotient, for an amount of radionuclide in a particular energy state at a given time, of dN by dt, where dN is the expectation value of the number of spontaneous nuclear transitions from this energy state in the time interval of duration dt: NOTE - This quantity is expressed in becquerels (Bq).
    Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=393-14-12

    activity

    of an amount of a radionuclide in a particular energy state at a given time, the quotient of dN by dt, where dN is the expectation value of the number of spontaneous nuclear transitions from that energy state in the time interval dt: NOTE - The SI unit of activity is the reciprocal second (s-1) and is given the special name b...
    Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-04-42

    activity

    The number of atoms of a radioactive substance that disintegrate per unit time. The SI unit of activity is the becquerel (Bq), named after Henri Becquerel. 1 Bq = 1 event of radiation emission per second. This is such a small unit that multiples of the Bq unit – kBq (kilobecquerel = 1000 Bq), ...
    Found on http://www.daviddarling.info/encyclopedia/A/activity.html

    activity

    (a) Type: Term Pronunciation: ak-tiv′i-tē Definitions: 1. electroencephalography The presence of neurogenic electrical energy. 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
    Found on http://www.medilexicon.com/medicaldictionary.php?t=978
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