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This method works well if you have one of those tin lids with a plastic screw-on ring around it, and it also works with some other containers where there is a metal lid and plastic screw-on ring around it

The decrease in lung function was similar to the declines chronicled in a well-known study of prolonged exposure to secondhand cigarette smoke, conducted in 1983

This fraction is within the range of other studies, in which a percentage of transfer between 6 and 20% has been determined 22,23 and very close to the most recent study 24 using a smoking machine to determine 210 Po and 210 Pb in the mainstream smoke (13% for 210 Po)

Hoffmann, D., Hoffmann, I