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The source apportionment of the redox activity of quasi-ultrafine particles (PM0.49), measured by the cell-free dithiothreitol (DTT) assay, was attempted at two urban sites (urban traffic, UT and urban background, UB) in Thessaloniki, northern Greece, following the increased biomass burning due to the economic crisis. Both, the per-mass and per-volume DTT redox activities of PM0.49 particles were...
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