Rem 12
Rem 12 :
A unit used for measuring the effective (or "equivalent") dose of radiation received by a human or some other living organism. One rem is equal to 0.01 sievert (Sv) or 10 millisieverts, which means it equals the actual dose received in rads (see above), multiplied by a "quality factor" which is larger for more dangerous forms of radiation. The rem is related to the rad in the same way that the sievert is related to the gray. "Rem" is an acronym for "roentgen equivalent: man," meaning that it measures the biological effects of ionizing radiation in humans. The unit was introduced in 1944 by the physicist H.M. Parker of the Manhattan Project
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