Authorities have distributed potassium iodide tablets to the nearby towns of Yerham, Dimona, and Aruar.

Potassium iodide blocks thyroid absorption of radioactive iodine, an early risk in a nuclear release.

Method The peroxide value is determined by measuring the amount of iodine which is formed by the reaction of peroxides (formed in fat or oil) with iodide ion.

Typical administration involves a pill or liquid containing sodium iodide (NaI) taken orally, which contains a small amount of iodine 131, amounting to perhaps less than a grain of salt.

Such efforts, Zheng reports, have involved some 6,533 cannons, 5,939 rocket launchers, and numerous aircraft in an attempt to seed clouds across one third of China s landmass with dry ice, ammonia, and silver iodide.