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A banana contains naturally occurring radioactive material in the form of potassium-40. Banana equivalent dose (BED) is an informal unit of measurement of ionizing radiation exposure, intended as a general educational example to compare a dose of radioactivity to the dose one is exposed to by eating one average-sized banana.
The banana equivalent dose is the dose of ionizing radiation to which a person is exposed by eating one banana. Bananas contain potassium . Natural potassium consists of 0.0117% of the radioactive isotope 40 K (potassium-40) and has a specific activity of 30,346 becquerels per kilogram, or about 30 becquerels per gram.
Whilst equivalent dose is used for the stochastic effects of external radiation, a similar approach is used for internal, or committed dose. The ICRP defines an equivalent dose quantity for individual committed dose, which is used to measure the effect of inhaled or ingested radioactive materials.
The Food and Drug Administration announced it was investigating "the possible hallucinogenic effects of banana peels". Nonetheless, bananadine became more widely known when William Powell , believing the Berkeley Barb article to be true, reproduced the method in The Anarchist Cookbook in 1970, under the name " Musa sapientum Bananadine ...
The equivalent dose is calculated by multiplying the absorbed energy, averaged by mass over an organ or tissue of interest, by a radiation weighting factor appropriate to the type and energy of radiation. To obtain the equivalent dose for a mix of radiation types and energies, a sum is taken over all types of radiation energy dose. [1]
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This is wrong - Sv is an unit of the equivalent dose, so the same number of sieverts should cause similarly severe health effects. The real issue here is that the conversion from Sv to Bq is very complicated and needs to take into account many factors, including the age of the exposed person, route of exposure, and others.
Acceptable daily intake or ADI is a measure of the amount of a specific substance (originally applied for a food additive, later also for a residue of a veterinary drug or pesticide) in food or drinking water that can be ingested (orally) daily over a lifetime without an appreciable health risk. [1]