specific activity


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specific activity

[spə′sif·ik ak′tiv·əd·ē]
(nucleonics)
The activity of a radioisotope of an element per unit weight of element present in the sample.
The activity per unit mass of a pure radionuclide.
The activity per unit weight of a sample of radioactive material. In these three cases, specific activity can be expressed in such units as millicuries per gram, disintegrations per second per milligram, or counts per minute per milligram.
References in periodicals archive ?
The specific activity of a radionuclide in a sample (Bq/kg) or volumetric activity in a sample (Bq/m3) is calculated by identifying the radionuclide activity in a sample and sample weight or amount, according to a formula (Dimaviciene, Butkus 2007):
Can you correlate your symptoms with any specific activity, meal, or time of day?
Another of the leads is a tachykinin splice variant that exhibits a specific activity in the peripheral nervous system.
After consultation with the Secretary, the Board will promptly make a written determination regarding whether the specific activity described in the request is included in an activity category listed in paragraph (e)(1) of this section and is therefore either financial in nature or incidental to a financial activity.
To be eligible, a nonprofit organization must show that the money would be used to start or expand an existing program or conduct a specific activity, city officials said.
In recent experiments, Brown and his colleagues demonstrated that the presence of a transcription complex underlies the specific activity of the oocyte gene.
The end product is a precisely defined-novel macromolecule with comparable specific activity in vitro, but superior duration of action in animal models compared to human recombinant erythropoietin.
Operating the Harmony Remote is as simple as selecting an activity, such as "Watch TV" or "Play a DVD," and all the proper commands for that specific activity are transmitted.
Out of more then 150 compounds tested, Alferon N(R) represents one of the most effective compounds, showing high specific activity on the replication of human SARS coronavirus.
Each section provides users with a list of cities relevant to that activity or lifestyle, a selection of maps and a detailed explanation of how to use the maps to plan for the specific activity.
The docQuest Activity Reporting Module (ARM) enables the tracking and gathering of information on docQuest specific activity, an important attribute considering that many systems fail to maximize the use of an audit trail.
One way the VentureCard program differs from existing travel incentives is the card is not a coupon to be used only for a specific activity or for a very limited number of activities.

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