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specific activity |
Also found in: Wikipedia | 0.06 sec. |
specific activity, 1 the radioactivity of a radioisotope per unit mass of the element or compound, expressed in microcuries per millimole or disintegrations per second per milligram. 2 the relative radioactivity per unit mass, expressed as counts per minute per milligram. For example, the specific activity of potassium in the human body is the same as that in the environment or diet. Because potassium is associated chiefly with muscle tissue, a whole-body count of 40K, after administration of radioactive potassium, can be used to distinguish lean body mass from total body mass. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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species specificity species-ism species-specific species-specific antigen specific specific absorption rate specific action specific activity Specific Activity Scale specific disease specific dynamic action specific dynamic energy specific granule specific granule deficiency specific gravity |
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