… asthmatic volunteers in the Stockholm underground study and 12,13… Stockholm underground
following exposure vs. no exposure, and further examination of the Stockholm underground …

… Suspended particulate matter, PM 1 and PM 2.5 , samples were sampled over two shifts to
allow sufficient numbers of particles to be collected on the filters for gravimetric analysis. Air …

… Exposure of volunteers in the Stockholm underground for 2 h found no change in lung …
A similar lack of obvious effect has been noted in Stockholm underground workers over the …

… particulate matter (PM 2.5 ) and carbon dioxide (CO 2 ) concentrations in stations and in trains
across the entire system. In partially underground … Filter samples of particulate matter are …

… to particulate matter by commuters at 12 underground … (daily and yearly) at the underground
subway stations with mean PM … street levels, the mean underground subway stations' PM 2.5 …

… The Fe/Mn ratio has been applied to assess the contribution of the materials (rails, wheels)
used in underground railroads to the emission of particulate matter; higher Fe/Mn ratio …

… The average concentrations of PM 2.5 and PM 10 in Stockholm… Particulate matters and their
emission sources reported in … be generated internally in the underground station (Salma et al…

… fine particulate matter (PM 2.5 ) across the London Underground … were highly variable within
Underground tunnels, ranging … into the tunnels of the London Underground network. For a …

… Data on urban background air quality provided by Stockholm Air Quality and Noise (SLB)
show that the background particulate matter varied between 0.5 and 31 µg m –3 …

… in underground train stations and tunnels. The concentration of particulate matter (PM10)
measured in Stockholm’… factors for particulate matter concentration levels in underground train …