Fig. 1From: Coal dust exposure triggers heterogeneity of transcriptional profiles in mouse pneumoconiosis and Vitamin D remediesThe chemical composition and particle size of coal dust are involved in this experiment. A The image of coal dust particles under scanning electron microscopy. All the particles are symmetrical, and the particle size distribution is narrow and has low silica content. B The distribution of coal dust particles is shown in the graph. C The chemical composition of coal dust particles was analyzed and presented in the tableBack to article page