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How it works
Ruyan, which means “like smoking,” introduced the world’s first electronic cigarette in 2004. It has patented its ultrasonic atomizing technology, in which nicotine is dissolved in a cartridge containing propylene glycol — the liquid that is vaporized in smoke machines in nightclubs or theaters and is commonly used as a solvent in food.
When a person takes a drag on the battery- powered cigarette, the solution is pumped through the atomizer and comes out as an ultrafine spray that resembles smoke.
Nicotine levels range from zero to 16 milligrams. The National Institutes of Health says regular cigarettes contain about 10 milligrams of nicotine. The Associated Press
