Fig. 4

Observation of mouse tissue section and determination of blood lipid index. HE staining and polarizing results of mouse lung (a) and liver (b) tissue sections show that the white arrows are deposited coal particles.TC (C), ALT (D), AST (E), HDL-C (F) and LDL-C (G) were measured in control group, early coal dust exposure group (14 days) and late coal dust exposure group (28 days).