Propylene hi res stock photography and images Alamy Characteristics of participants' personal electronic cigarette Download Scientific Diagram Chemical Composition of Aerosols of an Electronic Cigarette Aerosol and Air Quality Research View of a ClopiNette store in Paris, France on August 23, 2012. ClopiNette stores sell electronic cigarettes, also known as e cigarettes to help the consumers to quit smoking. The electrical device simulates Quantitative insights into major constituents contained in or released by electronic cigarettes: Propylene glycol, vegetable glycerin, and nicotine ScienceDirect