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. 2014 Nov 25;11:60. doi: 10.1186/s12989-014-0060-6

Figure 2.

Figure 2

The correlation between total PAH concentration (PC2, local combustion related constituents) in the PM 10–2.5 and PM 2.5–0.2 samples and inflammatory (A; TNF-α) and cytotoxicity (B; MTT) responses in mouse macrophages after exposure to three different doses (50, 150 and 300 μg/ml for 24 h) of indoor or outdoor air PM samples. The Pearson correlation coefficients are shown in the figure panel. Seasons are differentiated by colors (blue = winter, green = spring, yellow = summer, red = autumn). X-axis and Y-axis (A) are presented in logarithmic scale and Y-axis (B) in linear scale.