microcurie

Another commonly used measure of radioactivity is the microcurie:

One microcurie (37 kBq) of SeHCAT was given orally in capsule form to each subject.

Note: A microcurie (Ci) is a measure of the disintegration rate, or activity, of a radioactive source; it is 2.22E06 disintegrations per minute.

Turning to the health safety of the experiment, and without going into all the technical details, it is sufficient to point out that each subject received a one-time dose of .85 microcurie of calcium 45.

Bailey created Radithor by dissolving radium salts in water to deliver 1 microcurie of radiation from each of Ra and Ra, claiming its curative properties were due to stimulation of the endocrine system.

In place of or in addition to the keep-alive electrode some krytrons may contain a very tiny amount of radioactive material (usually less than 5 microcurie of nickel-63) which emits beta particles (high-speed electrons) to make ionization easier.

Following the generally accepted human permissible dose levels and parameters of the International Committee on Radiological Protection, about 60 percent of the administered calcium 45 was absorbed (and later eliminated from the body), making the initial effective dose about .5 microcurie.